Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences最新文献_第4页

Characterizing longitude variation on Chariklo's main ring. 描绘查里克洛主环上的经度变化。

IF 4.3 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2025-02-27 DOI: 10.1098/rsta.2024.0199

A R Gomes-Junior, A L R Mitidiero, B E Morgado, B Sicardy

引用次数: 0

Stellar occultations: a gateway to advances in planetary science. 恒星掩星：通往行星科学进步的大门。

IF 4.3 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2025-02-27 DOI: 10.1098/rsta.2024.0202

D Souami, R Sfair, S Renner, M El Moutamid

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Contributions of 'citizen science' to occultation astronomy. “公民科学”对掩星天文学的贡献。

IF 4.3 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2025-02-27 DOI: 10.1098/rsta.2024.0197

Wolfgang Beisker, Konrad Guhl, Thierry Midavaine

{"title":"Contributions of 'citizen science' to occultation astronomy.","authors":"Wolfgang Beisker, Konrad Guhl, Thierry Midavaine","doi":"10.1098/rsta.2024.0197","DOIUrl":"https://doi.org/10.1098/rsta.2024.0197","url":null,"abstract":"The modern term 'citizen science' describes a very old tradition in the natural sciences. Until the specialization of the sciences at the end of the eighteenth century, the emergence of technical universities and the formation of a modern scientific enterprise, citizen science was the norm. Since the 1960s, amateur astronomers have increasingly observed stellar occultations, first by the Moon and in the last three decades by main belt asteroids and outer solar system bodies. As in other branches of astronomy, occultation work has profited tremendously from technological advances in the last 40 years. Special for occultation work citizen scientists have developed cameras with millisecond-precise absolute timing that is necessary in occultation work. Modern star catalogues, such as the Hipparcos, UCAC and, lately, the Gaia catalogues, have helped to improve predictions of such events. Easy to handle software to predict occultations has been developed for the occultation observers. Cooperations and networks between professionals and amateurs have led to scientific improvement and coverage of occultations. This results in many peer-reviewed publications, where amateurs play an increasing role.This article is part of the theme issue 'Major advances in planetary sciences thanks to stellar occultations'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"383 2291","pages":"20240197"},"PeriodicalIF":4.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143516479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Shapes of large main belt asteroids, deviation from hydrostatic equilibria and geophysical properties. 大型主带小行星的形状，流体静力平衡的偏差和地球物理性质。

IF 4.3 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2025-02-27 DOI: 10.1098/rsta.2024.0186

J Vermersch, N Rambaux, B Sicardy

{"title":"Shapes of large main belt asteroids, deviation from hydrostatic equilibria and geophysical properties.","authors":"J Vermersch, N Rambaux, B Sicardy","doi":"10.1098/rsta.2024.0186","DOIUrl":"https://doi.org/10.1098/rsta.2024.0186","url":null,"abstract":"A recent high-angular resolution imaging survey of 42 large main belt asteroids, with the SPHERE/ZIMPOL instrument of VLT, has provided shape models with unprecedented kilometre accuracy. The aim of this paper is to determine the equilibrium figures of these asteroids from their shape models, in order to define a size limit between dwarf planets and small bodies. Therefore, we quantify the deviation of asteroids from homogeneous hydrostatic equilibria (Maclaurin and Jacobi ellipsoids) using a spherical harmonic analysis and a minimization criterion computation. Then, this deviation is interpreted through a study of the physical and geophysical properties of asteroids. As a result, although 80% of asteroids tend towards spheroidal figures, only nine volatile-rich asteroids are compatible with Maclaurin ellipsoids. Among the remaining asteroids, about 30% could be differentiated or fossil shape, and 50% require failure criteria to describe their shape, damaged by interactions with their environments (families, satellites, collisions). The geophysical parameters calculated for these bodies are: topography perceptible through high and odd degree coefficients, internal friction angles between [Formula: see text] and [Formula: see text], stress deviation tensors higher than 0.2 MPa, strength lower than 5 MPa.This article is part of the theme issue 'Major advances in planetary sciences thanks to stellar occultations'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"383 2291","pages":"20240186"},"PeriodicalIF":4.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143516164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating the formation of small Solar System objects using stellar occultations by satellites: present, future and its use to update satellite orbits. 利用卫星掩星研究小型太阳系天体的形成：现在、未来及其用于更新卫星轨道。

IF 4.3 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2025-02-27 DOI: 10.1098/rsta.2024.0200

F Braga-Ribas, F Vachier, J Desmars, G Margoti, B Sicardy

{"title":"Investigating the formation of small Solar System objects using stellar occultations by satellites: present, future and its use to update satellite orbits.","authors":"F Braga-Ribas, F Vachier, J Desmars, G Margoti, B Sicardy","doi":"10.1098/rsta.2024.0200","DOIUrl":"https://doi.org/10.1098/rsta.2024.0200","url":null,"abstract":"The history of the outer solar system is intrinsically related to the Giant Planets migration. A massive disk of material within a radius of 30 au was scattered during the planetary migration, creating different dynamic populations in the Transneptunian region. They were formed in a collisional environment when massive collisions allowed them to grow and form much smaller moons than the primary body. The dynamical group, known as the Cold Classicals, was formed in a sparse disk from 42 to about 47 au and did not suffer much from planet migration. Observations show that many of Cold Classical are binary, consistent with the streaming instability process. The stellar occultation technique, with a spatial resolution of a few kilometres, can be used to search for binaries where other techniques are unable to do so, and to characterize the known satellites of Trans-Neptunian Objects (TNO), constraining their formation scenarios. We review here the first stellar occultations by TNO's satellites (besides Charon), and discuss the methods used to detect these events. We also fit new orbital elements and system mass for Vanth (Orcus/1) and Weywot (Quaoar/1), finding reasonable solutions for pure Keplerian orbits. Finally, we discuss the prospects regarding the stellar occultations by TNO binaries and their implications for the study of the history of the Solar System.This article is part of the theme issue 'Major advances in planetary sciences thanks to stellar occultations'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"383 2291","pages":"20240200"},"PeriodicalIF":4.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143516488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physical characteristics of Jupiter's Trojan (1437) Diomedes from a tri-chord stellar occultation in 2020 and dimensionless three-dimensional model. 2020年三弦星掩星对木星特洛伊（1437）狄俄墨德斯的物理特征和无维三维模型。

IF 4.3 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2025-02-27 DOI: 10.1098/rsta.2024.0187

H Dutra, M Assafin, B Sicardy, J L Ortiz, A R Gomes-Júnior, B E Morgado, G Benedetti-Rossi, F Braga Ribas, G Margoti, E Gradovski, J I B Camargo, R Boufleur, R Vieira-Martins, J Desmars, D Oesper, K Bender, C Kitting, R Nolthenius

{"title":"Physical characteristics of Jupiter's Trojan (1437) Diomedes from a tri-chord stellar occultation in 2020 and dimensionless three-dimensional model.","authors":"H Dutra, M Assafin, B Sicardy, J L Ortiz, A R Gomes-Júnior, B E Morgado, G Benedetti-Rossi, F Braga Ribas, G Margoti, E Gradovski, J I B Camargo, R Boufleur, R Vieira-Martins, J Desmars, D Oesper, K Bender, C Kitting, R Nolthenius","doi":"10.1098/rsta.2024.0187","DOIUrl":"https://doi.org/10.1098/rsta.2024.0187","url":null,"abstract":"Jupiter Trojans preserve primitive formation characteristics owing to their collisionless, stable orbits. Determination of their shapes and size-frequency distribution helps constrain the collisional evolution of their parent population, which also originated the Kuiper Belt. We started a programme to find precise sizes/shapes for Trojans, combining stellar occultations and the Database of Asteroid Models from Inversion Techniques (DAMIT) three-dimensional shape models. We report results for Diomedes, by fitting its unit dimensionless three-dimensional model to three chords of a stellar occultation observed in 2020, using iterative [Formula: see text] procedures. The pole coordinates, rotation period, volume-equivalent radius and geometric albedo were [Formula: see text] = 153.73°[Formula: see text] 2.5°, [Formula: see text] = 12.69° [Formula: see text] 2.6°, [Formula: see text] = 24.4984 [Formula: see text] 0.0002 h, [Formula: see text] = 59.4 [Formula: see text] 0.3 km and [Formula: see text] = 0.030 [Formula: see text] 0.004, respectively. A precise position was also obtained.This article is part of the theme issue 'Major advances in planetary sciences thanks to stellar occultations'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"383 2291","pages":"20240187"},"PeriodicalIF":4.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143515739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Centaur 29P/Schwassmann-Wachmann 1 and its near-nucleus environment from a stellar occultation. 半人马座29P/Schwassmann-Wachmann 1及其近核环境的恒星掩星。

IF 4.3 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2025-02-27 DOI: 10.1098/rsta.2024.0189

C L Pereira, F Braga-Ribas, B Sicardy, B E Morgado, J L Ortiz, M Assafin, R Miles, J Desmars, J I B Camargo, G Benedetti-Rossi, M Kretlow, R Vieira-Martins

{"title":"Centaur 29P/Schwassmann-Wachmann 1 and its near-nucleus environment from a stellar occultation.","authors":"C L Pereira, F Braga-Ribas, B Sicardy, B E Morgado, J L Ortiz, M Assafin, R Miles, J Desmars, J I B Camargo, G Benedetti-Rossi, M Kretlow, R Vieira-Martins","doi":"10.1098/rsta.2024.0189","DOIUrl":"https://doi.org/10.1098/rsta.2024.0189","url":null,"abstract":"Comets offer valuable insights into the early Solar System's conditions and processes. Stellar occultations enable detailed study of cometary nuclei typically hidden by their coma. Observing the star's light passing through the coma helps infer dust's optical depth near the nucleus and determine dust opacity detection limits. 29P/Schwassmann-Wachmann 1, a Centaur with a diameter of approximately 60 km, lies in a region transitioning from Centaurs to Jupiter-family comets. Our study presents the first-ever observed occultation by 29P, allowing in the future for a more refined orbit and thus better predictions for other occultations. The light curve reveals a solid-body detection lasting [Formula: see text] s, corresponding to a chord length of approximately 54 km. This provides a lower limit for the object's radius, measured at [Formula: see text] km. We identified features on both sides of the main-body occultation around 1700 km from the nucleus in the sky plane for which upper limits on apparent opacity and equivalent width were determined. Gradual dimming within 23 km of the nucleus during ingress only is interpreted as a localized dust cloud/jet above the surface with an optical depth of approximately [Formula: see text].This article is part of the theme issue 'Major advances in planetary sciences thanks to stellar occultations'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"383 2291","pages":"20240189"},"PeriodicalIF":4.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143516536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Origins of rings in the Solar System. 太阳系环的起源。

IF 4.3 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2025-02-27 DOI: 10.1098/rsta.2024.0193

B Sicardy, M El Moutamid, S Renner, R Sfair, D Souami

引用次数: 0

Formation of the International Occultation Timing Association/East Asia (IOTA/EA) and occultation observations of asteroid (3200) Phaethon. 国际掩星计时协会/东亚（IOTA/EA）的成立和小行星（3200）Phaethon的掩星观测。

IF 4.3 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2025-02-27 DOI: 10.1098/rsta.2024.0190

Fumi Yoshida, Tsutomu Hayamizu, Hayato Watanabe, Hiroshi Akitaya, Kazuhisa Miyashita, Hirotomo Noda, Mitsuru Sôma, Chilong Lin, Ye Yuan, Wai-Chun Yue, Toshihiro Horaguchi, Sean Marshall

引用次数: 0

Yarkovsky and YORP effects simulation on 3200 Phaethon. 3200 Phaethon上Yarkovsky和YORP效应模拟。

IF 4.3 3区综合性期刊

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Pub Date : 2025-02-27 DOI: 10.1098/rsta.2024.0205

Hiroki Senshu, Hirotomo Noda, Fumi Yoshida, Takashi Ito, Maximilian Hamm, Sean Marshall

{"title":"Yarkovsky and YORP effects simulation on 3200 Phaethon.","authors":"Hiroki Senshu, Hirotomo Noda, Fumi Yoshida, Takashi Ito, Maximilian Hamm, Sean Marshall","doi":"10.1098/rsta.2024.0205","DOIUrl":"10.1098/rsta.2024.0205","url":null,"abstract":"We carry out a numerical study on the thermal behaviour of asteroid 3200 Phaethon, the parent body of the Geminid meteor shower. Phaethon's orbit is highly eccentric, with the perihelion distance as small as [Formula: see text]. During the perihelion passage the surface temperature rises so much that the reaction force of the thermal radiation from its surface affects Phaethon's orbital and spin motion. We evaluate this thermal effect precisely by numerically modelling the thermal variation during an orbital period. We find that the thermal effect, both on the orbital motion and spin, changes its sign near the perihelion owing to the geometric configuration of the spin axis direction relative to the Phaethon-Sun direction. Consequently, the canonical expression of the thermally induced momentum is not applicable for the case of bodies on a highly eccentric orbit such as Phaethon. Nevertheless, the resulting orbital-averaged thermal effect is consistent with ground-based observation and previous estimates.This article is part of the theme issue 'Major advances in planetary sciences thanks to stellar occultations'.","PeriodicalId":19879,"journal":{"name":"Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences","volume":"383 2291","pages":"20240205"},"PeriodicalIF":4.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11866604/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143516089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0