The Planetary Science Journal最新文献

There’s More to Life in Reflected Light: Simulating the Detectability of a Range of Molecules for High-contrast, High-resolution Observations of Nontransiting Terrestrial Exoplanets 反射光中有更多的生命：模拟一系列分子的可探测性，用于高对比度，高分辨率的非过境类地系外行星观测

The Planetary Science Journal Pub Date : 2025-04-01 DOI: 10.3847/psj/adc004

Miles Currie, Victoria Meadows

{"title":"There’s More to Life in Reflected Light: Simulating the Detectability of a Range of Molecules for High-contrast, High-resolution Observations of Nontransiting Terrestrial Exoplanets","authors":"Miles Currie, Victoria Meadows","doi":"10.3847/psj/adc004","DOIUrl":"https://doi.org/10.3847/psj/adc004","url":null,"abstract":"Abstract The upcoming extremely large telescopes (ELTs) will provide the first opportunity to search for signs of habitability and life on nontransiting terrestrial exoplanets using high-contrast, high-resolution instrumentation. However, the suite of atmospheric gases in terrestrial exoplanet environments that are accessible to ground-based reflected light observations has not been thoroughly explored. In this work, we use an upgraded ELT detectability pipeline to simulate the detectability of gases that can serve as habitability markers, potential biosignatures, and false-positive discriminants in the atmospheres of Earth-sized and sub-Neptune planets. We calculate molecular detectability for five photochemically self-consistent atmosphere types, including the modern and Archean Earth, uninhabited biosignature “false-positive” environments, and a sub-Neptune, over a grid of observational configurations for nontransiting targets within 10 pc of Earth. For the most accessible nearby target, Proxima Centauri b, our results suggest that we may be able to rule out a sub-Neptune atmosphere in as little as a single hour of observing, and two biosignature disequilibrium pairs (O 2 /CH 4 and CO 2 /CH 4 ) may be accessible in ∼10 hr for the most optimistic scenario. It may also be possible to discriminate uninhabited worlds and rule out biosignature false positives by identifying contextual indicators (CO and H 2 O) of abiotic O 2 and/or CH 4 buildup on similar timescales. In the near term, ELT reflected light observations will likely allow us to characterize multiple nearby terrestrial atmospheres and ultimately search for signs of habitability and life.","PeriodicalId":507360,"journal":{"name":"The Planetary Science Journal","volume":"6 4","pages":"96-96"},"PeriodicalIF":0.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147893601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Spectroscopic Analysis of Ca–Sr, Ba–Sr, and Ca–Ba Sulfate Solid Solutions for In Situ Observations on Mars 火星上原位观测中Ca-Sr， Ba-Sr和Ca-Ba硫酸盐固溶体的光谱分析

The Planetary Science Journal Pub Date : 2025-03-01 DOI: 10.3847/psj/adb39b

Erbin Shi, Xiaojia Zeng, Jian Chen, Enming Ju, Zongcheng Ling

{"title":"Spectroscopic Analysis of Ca–Sr, Ba–Sr, and Ca–Ba Sulfate Solid Solutions for In Situ Observations on Mars","authors":"Erbin Shi, Xiaojia Zeng, Jian Chen, Enming Ju, Zongcheng Ling","doi":"10.3847/psj/adb39b","DOIUrl":"https://doi.org/10.3847/psj/adb39b","url":null,"abstract":"Abstract Calcium sulfates are widely distributed in Gale crater and Endeavour crater on Mars. However, the mole ratios of Ca 2+ and SO 3 in some Sr–Ba-rich sulfate veins are less than 1. This indicates that there may be additional solid solution phases on Mars, including Ca–Sr, Ba–Sr, and Ca–Ba sulfates, which, on Earth, are typically found in marine environments. In this study, we synthesized a series of Ca–Sr, Ba–Sr, and Ca–Ba sulfate solid solutions in the laboratory. These synthesized solid solutions were then characterized using various techniques, including X-ray powder diffraction (XRD), Raman, mid-infrared, and visible and near-infrared. Our results show that the XRD and Raman spectra of Ca–Sr and Ba–Sr sulfates varied with their cation contents. In particular, the linear relationships ( R 2 ≥ 0.98) between the mole ratios of cation ions and peak positions of <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" overflow=\"scroll\"> <mml:msubsup> <mml:mrow> <mml:mi mathvariant=\"normal\">SO</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>4</mml:mn> </mml:mrow> <mml:mrow> <mml:mn>2</mml:mn> <mml:mi mathvariant=\"italic\">−</mml:mi> </mml:mrow> </mml:msubsup> </mml:math> tetrahedron ( v 1 ) in Raman spectra were obtained. The mole content of Ca 2+ , Sr 2+ , and Ba 2+ can be precisely constrained in Ca–Sr, Ba–Sr, and Ca–Ba sulfate solid solution phases through linear relationships, respectively. These results are the experimental basis for analyzing in situ detection data (e.g., SHERLOC, SuperCam, and Oxia planum) and can be used to precisely constrain the mineral phases of calcium sulfate veins on Mars.","PeriodicalId":507360,"journal":{"name":"The Planetary Science Journal","volume":"6 3","pages":"55-55"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147334029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Uranus Orbiter and Probe: A Radio Science Investigation to Determine the Planet’s Gravity Field, Depth of the Winds, and Tidal Deformations 天王星轨道器和探测器：无线电科学调查：确定行星引力场、风的深度和潮汐变形

The Planetary Science Journal Pub Date : 2024-05-01 DOI: 10.3847/psj/ad4034

M. Parisi, A. Friedson, C. R. Mankovich, M. Hofstadter, A. Akins, Reza Karimi, Damon F. Landau

{"title":"Uranus Orbiter and Probe: A Radio Science Investigation to Determine the Planet’s Gravity Field, Depth of the Winds, and Tidal Deformations","authors":"M. Parisi, A. Friedson, C. R. Mankovich, M. Hofstadter, A. Akins, Reza Karimi, Damon F. Landau","doi":"10.3847/psj/ad4034","DOIUrl":"https://doi.org/10.3847/psj/ad4034","url":null,"abstract":"\u0000 The most recent Planetary Science and Astrobiology Decadal Survey has proposed Uranus as the target for NASA’s next large-scale mission. The interior structure and atmosphere of the planet are currently poorly understood, and objectives for investigating Uranus’s deeper regions and composition are highly ranked. Traditionally, gravity science has served as one of the primary means for probing the depths of planetary bodies and inferring their internal density distributions. In this work, we present precise numerical simulations of an onboard radio science experiment designed to determine Uranus’s gravity field and tidal deformations, which would offer a rare view into the planet’s interior. We focus on the mission’s orbital planning, discussing crucial parameters such as the number of pericenter passes, orbital inclination, and periapsis altitude necessary to meet the gravity measurement requirements for a Uranus orbiter. Our findings suggest that eight close encounters may be sufficient to determine the zonal gravity field up to J\u0000 8 with a relative accuracy of 10%, if the trajectory is optimized. This would allow for the decoupling of the gravity field components due to interior structure and zonal winds. Additionally, we find that the expected end-of-mission uncertainty on Uranus’s Love number k\u0000 22 is of order ∼0.01 (3σ). This level of accuracy may offer crucial information about Uranus’s inner state and allow for discriminating between a liquid and solid core, thus shedding light on crucial aspects of the planet’s formation and evolution.","PeriodicalId":507360,"journal":{"name":"The Planetary Science Journal","volume":"46 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141033230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dry Downhill Particle Motion on Mars 火星上干燥的下坡粒子运动

The Planetary Science Journal Pub Date : 2024-05-01 DOI: 10.3847/psj/ad3df4

Tetyana Bila, G. Wurm, Kai Stuers, Kolja Joeris, J. Teiser

引用次数: 0

VADER: Probing the Dark Side of Dimorphos with LICIACube LUKE VADER：与 LICIACube LUKE 一起探索 Dimorphos 的黑暗面

The Planetary Science Journal Pub Date : 2024-04-01 DOI: 10.3847/psj/ad3826

A. Zinzi, P. Hasselmann, V. Della Corte, J. Deshapriya, I. Gai, A. Lucchetti, A. Pajola, A. Rossi, E. Dotto, E. Mazzotta Epifani, R. T. Daly, M. Hirabayashi, T. Farnham, C. M. Ernst, S. Ivanovski, J.-Y. Li, L. Parro, M. Amoroso, J. Beccarelli, I. Bertini, J. Brucato, Andrea Capannolo, S. Caporali, M. Ceresoli, G. Cremonese, M. Dall’Ora, L. Gomez Casajus, E. Gramigna, S. Ieva, G. Impresario, R. Lasagni Manghi, M. Lavagna, M. Lombardo, D. Modenini, B. Negri, P. Palumbo, D. Perna, S. Pirrotta, G. Poggiali, P. Tortora, F. Tusberti, M. Zannoni, G. Zanotti

{"title":"VADER: Probing the Dark Side of Dimorphos with LICIACube LUKE","authors":"A. Zinzi, P. Hasselmann, V. Della Corte, J. Deshapriya, I. Gai, A. Lucchetti, A. Pajola, A. Rossi, E. Dotto, E. Mazzotta Epifani, R. T. Daly, M. Hirabayashi, T. Farnham, C. M. Ernst, S. Ivanovski, J.-Y. Li, L. Parro, M. Amoroso, J. Beccarelli, I. Bertini, J. Brucato, Andrea Capannolo, S. Caporali, M. Ceresoli, G. Cremonese, M. Dall’Ora, L. Gomez Casajus, E. Gramigna, S. Ieva, G. Impresario, R. Lasagni Manghi, M. Lavagna, M. Lombardo, D. Modenini, B. Negri, P. Palumbo, D. Perna, S. Pirrotta, G. Poggiali, P. Tortora, F. Tusberti, M. Zannoni, G. Zanotti","doi":"10.3847/psj/ad3826","DOIUrl":"https://doi.org/10.3847/psj/ad3826","url":null,"abstract":"\u0000 The ASI cubesat LICIACube has been part of the first planetary defense mission DART, having among its scopes to complement the DRACO images to better constrain the Dimorphos shape. LICIACube had two different cameras, LEIA and LUKE, and to accomplish its goal, it exploited the unique possibility of acquiring images of the Dimorphos hemisphere not seen by DART from a vantage point of view, in both time and space. This work is indeed aimed at constraining the tridimensional shape of Dimorphos, starting from both LUKE images of the nonimpacted hemisphere of Dimorphos and the results obtained by DART looking at the impacted hemisphere. To this aim, we developed a semiautomatic Computer Vision algorithm, named VADER, able to identify objects of interest on the basis of physical characteristics, subsequently used as input to retrieve the shape of the ellipse projected in the LUKE images analyzed. Thanks to this shape, we then extracted information about the Dimorphos ellipsoid by applying a series of quantitative geometric considerations. Although the solution space coming from this analysis includes the triaxial ellipsoid found by using DART images, we cannot discard the possibility that Dimorphos has a more elongated shape, more similar to what is expected from previous theories and observations. The result of our work seems therefore to emphasize the unique value of the LICIACube mission and its images, making even clearer the need of having different points of view to accurately define the shape of an asteroid.","PeriodicalId":507360,"journal":{"name":"The Planetary Science Journal","volume":"107 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140757042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sulfur Implantation into Water Ice with Propane: Implications for Organic Chemistry on the Surface of Europa 用丙烷将硫植入水冰：欧罗巴表面有机化学的意义

The Planetary Science Journal Pub Date : 2024-04-01 DOI: 10.3847/psj/ad3204

A. Bouquet, Cíntia Aparecida Pires da Costa, P. Boduch, Hermann Rothard, Alicja Domaracka, G. Danger, Isabelle Schmitz, C. Afonso, P. Schmitt-Kopplin, V. Hue, T. Nordheim, Alexander Ruf, F. Duvernay, Maryse Napoleoni, N. Khawaja, F. Postberg, Thomas Javelle, O. Mousis, Laura Isabel Tenelanda Osorio

{"title":"Sulfur Implantation into Water Ice with Propane: Implications for Organic Chemistry on the Surface of Europa","authors":"A. Bouquet, Cíntia Aparecida Pires da Costa, P. Boduch, Hermann Rothard, Alicja Domaracka, G. Danger, Isabelle Schmitz, C. Afonso, P. Schmitt-Kopplin, V. Hue, T. Nordheim, Alexander Ruf, F. Duvernay, Maryse Napoleoni, N. Khawaja, F. Postberg, Thomas Javelle, O. Mousis, Laura Isabel Tenelanda Osorio","doi":"10.3847/psj/ad3204","DOIUrl":"https://doi.org/10.3847/psj/ad3204","url":null,"abstract":"\u0000 We performed experiments of implantation of energetic sulfur ions (105 keV) into 2:1 water:propane ices at 80 K and analyzed the resulting refractory organic matter with ultrahigh-resolution mass spectrometry. Our goal was to characterize the organic matter processed in the surface conditions of Europa, where it would receive a heavy flux of energetic particles, including sulfur ions, and determine whether organosulfurs could be formed in these conditions, using the simplest alkane that can exist in solid form on Europa’s surface. We find that the produced organic matter contains a large variety of both aliphatic and aromatic compounds (several thousand unique formulae), including polycyclic aromatic hydrocarbons (PAHs), with masses up to 900 amu. A large number of aromatic hydrocarbons is found along with oxygenated, mostly aliphatic, compounds. Organosulfurs are found in both CHS and CHOS form, demonstrating they can be formed from any organic compound through sulfur implantation. These organosulfurs’ properties (aromaticity, mass) appear similar to the rest of the organic matter, albeit their low quantity does not allow for a thorough comparison. Our results have implications for the type of refractory organic matter that could be observed by the JUICE and Europa Clipper space missions and how the surface of Europa could generate complex organics, including PAHs and organosulfurs, that could then enrich the subsurface ocean. In particular, they indicate that a large diversity of organic matter, including organosulfurs, can be formed from simple precursors in a geologically short time frame under the ion flux that reaches Europa.","PeriodicalId":507360,"journal":{"name":"The Planetary Science Journal","volume":"9 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140769917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tectonics and Seismicity of the Lunar South Polar Region 月球南极地区的构造和地震活动

The Planetary Science Journal Pub Date : 2024-01-01 DOI: 10.3847/psj/ad1332

T. R. Watters, N. C. Schmerr, R. C. Weber, C. L. Johnson, E. Speyerer, M. S. Robinson, M. E. Banks

{"title":"Tectonics and Seismicity of the Lunar South Polar Region","authors":"T. R. Watters, N. C. Schmerr, R. C. Weber, C. L. Johnson, E. Speyerer, M. S. Robinson, M. E. Banks","doi":"10.3847/psj/ad1332","DOIUrl":"https://doi.org/10.3847/psj/ad1332","url":null,"abstract":"\u0000 The lunar south pole regions are subjected to global stresses that result in contractional deformation and associated seismicity. This deformation is mainly expressed by lobate thrust fault scarps; examples are globally distributed, including polar regions. One small cluster of lobate scarps falls within the de Gerlache Rim 2 Artemis III candidate landing region. The formation of the largest de Gerlache scarp, less than 60 km from the pole, may have been the source of one of the strongest shallow moonquakes recorded by the Apollo Passive Seismic Network. The scarp is within a probabilistic space of relocated epicenters for this event determined in a previous study. Modeling suggests that a shallow moonquake with an M\u0000 \u0000 w\u0000 of ∼5.3 may have formed the lobate thrust fault scarp. We modeled the peak ground acceleration generated by such an event and found that strong to moderate ground shaking is predicted at a distance from the source of at least ∼40 km, while moderate to light shaking may extend beyond ∼50 km. Models of the slope stability in the south polar region predict that most of the steep slopes in Shackleton crater are susceptible to regolith landslides. Light seismic shaking may be all that is necessary to trigger regolith landslides, particularly if the regolith has low cohesion (on the order of ∼0.1 kPa). The potential of strong seismic events from active thrust faults should be considered when preparing and locating permanent outposts and pose a possible hazard to future robotic and human exploration of the south polar region.","PeriodicalId":507360,"journal":{"name":"The Planetary Science Journal","volume":"311 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139635886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Relative Effects of Surface and Subsurface Morphology on the Deflection Efficiency of Kinetic Impactors: Implications for the DART Mission 表面和次表面形态对动能撞击器偏转效率的相对影响：对 DART 任务的影响

The Planetary Science Journal Pub Date : 2024-01-01 DOI: 10.3847/psj/ad11ec

M. DeCoster, R. Luther, Gareth S. Collins, Kaiyi Dai, T. Davison, D. Graninger, Felix Kaufmann, E. Rainey, A. Stickle

{"title":"The Relative Effects of Surface and Subsurface Morphology on the Deflection Efficiency of Kinetic Impactors: Implications for the DART Mission","authors":"M. DeCoster, R. Luther, Gareth S. Collins, Kaiyi Dai, T. Davison, D. Graninger, Felix Kaufmann, E. Rainey, A. Stickle","doi":"10.3847/psj/ad11ec","DOIUrl":"https://doi.org/10.3847/psj/ad11ec","url":null,"abstract":"\u0000 The Double Asteroid Redirection Test (DART) mission impacted Dimorphos, the moonlet of the binary asteroid 65803 Didymos, on 2022 September 26 and successfully tested a kinetic impactor as an asteroid deflection technique. The success of the deflection was partly due to the momentum of the excavated ejecta material, which provided an extra push to change Dimorphos’s orbital period. Preimpact images provided constraints on the surface but not the subsurface morphology of Dimorphos. DART observations indicated that Dimorphos contained a boulder-strewn surface, with an impact site located between a cluster of large surface boulders. In order to better understand the momentum enhancement factor (β) resulting from the impact, we performed impact simulations into two types of targets: idealized homogeneous targets with a single boulder of varying size and buried depth at the impact site and an assembly of boulders at the impact site with subsurface layers. We investigated the relative effects of surface morphology to subsurface morphology to put constraints on the modeling phase space for DART following impact. We found that surface features created a 30%–96% armoring effect on β, with large surface boulders measuring on the order of the spacecraft bus creating the largest effect. Subsurface effects were more subtle (3%–23%) and resulted in an antiarmoring effect on β, even when layers/boulders were close to the surface. We also compared our 2D axisymmetric models to a 3D rectilinear model to understand the effects of grid geometry and dimension on deflection efficiency computational results.","PeriodicalId":507360,"journal":{"name":"The Planetary Science Journal","volume":"24 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139633192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dimorphos Orbit Determination from Mutual Events Photometry 通过相互事件光度测定法确定迪莫非斯轨道

The Planetary Science Journal Pub Date : 2024-01-01 DOI: 10.3847/psj/ad12cf

P. Scheirich, P. Pravec, A. J. Meyer, H. Agrusa, Derek C. Richardson, S. Chesley, S. Naidu, Cristina A. Thomas, N. Moskovitz

{"title":"Dimorphos Orbit Determination from Mutual Events Photometry","authors":"P. Scheirich, P. Pravec, A. J. Meyer, H. Agrusa, Derek C. Richardson, S. Chesley, S. Naidu, Cristina A. Thomas, N. Moskovitz","doi":"10.3847/psj/ad12cf","DOIUrl":"https://doi.org/10.3847/psj/ad12cf","url":null,"abstract":"\u0000 The NASA Double Asteroid Redirection Test spacecraft successfully impacted the Didymos–Dimorphos binary asteroid system on 2022 September 26 UTC. We provide an update to its preimpact mutual orbit and estimate the postimpact physical and orbital parameters, derived using ground-based photometric observations taken from 2022 July to 2023 February. We found that the total change of the orbital period was −33.240 ± 0.072 minutes (all uncertainties are 3σ). We obtained the eccentricity of the postimpact orbit to be 0.028 ± 0.016 and the apsidal precession rate was 7.3 ± 2.0 degrees day−1 from the impact to 2022 December 2. The data taken later in 2022 December to 2023 February suggest that the eccentricity dropped close to zero or the orbit became chaotic approximately 70 days after the impact. Most of the period change took place immediately after the impact, but in the few weeks following the impact it was followed by an additional change of \u0000 \u0000\u0000\u0000 \u0000 −\u0000 \u0000 \u0000 27\u0000 \u0000 \u0000 −\u0000 58\u0000 \u0000 \u0000 +\u0000 19\u0000 \u0000 \u0000 \u0000 \u0000 s or −19 ± 18 s (the two values depend on the approach we used to describe the evolution of the orbital period after the impact—an exponentially decreasing angular acceleration or the assumption of a constant orbital period, which changed abruptly some time after the impact, respectively). We estimate the preimpact Dimorphos–Didymos size ratio was 0.223 ± 0.012 and the postimpact is 0.202 ± 0.018, which indicate a marginally significant reduction of Dimorphos’ volume by (9 ± 9)% as the result of the impact.","PeriodicalId":507360,"journal":{"name":"The Planetary Science Journal","volume":"2 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139635269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Cassini UVIS Observations of the Enceladus Auroral Footprint on Saturn in 2017 卡西尼号紫外可见光谱仪 2017 年对土星上的恩克拉多斯极光足迹的观测

The Planetary Science Journal Pub Date : 2024-01-01 DOI: 10.3847/psj/ad0cbc

W. Pryor, Fabiola P. Magalhães, Laurent Lamy, R. Prangé, Larry W. Esposito, J. Gustin, A. Rymer, A. Sulaiman

引用次数: 0