Nature Astronomy最新文献_第7页

Astro-tourism offers opportunities to SKA locals 天文旅游为SKA当地人提供了机会

IF 15.2 1区物理与天体物理

Nature Astronomy Pub Date : 2026-08-14 DOI: 10.1038/s41550-026-02942-2

Ray Mwareya

引用次数: 0

Ionospheric escape of {bf{H}}_{mathbf{3}}^{mathbf{+}}{bf{H}}_{mathbf{3}}^{mathbf{+}} from Jupiter’s polar regions 电离层逃脱的{ bf {H}} _ { mathbf {3}} ^ { mathbf {+}} { bf {H}} _ { mathbf {3}} ^ { mathbf{+}}从木星的极地

IF 14.1 1区物理与天体物理

Nature Astronomy Pub Date : 2026-08-13 DOI: 10.1038/s41550-026-02950-2

Jian-zhao Wang, Fran Bagenal, Jamey R. Szalay, Philip W. Valek, Ali H. Sulaiman, Licia C. Ray, Bertrand Bonfond, Robert J. Wilson, Robert W. Ebert, Frederic Allegrini, George Clark, Thomas K. Kim, Jack H. Waite

{"title":"Ionospheric escape of {bf{H}}_{mathbf{3}}^{mathbf{+}}{bf{H}}_{mathbf{3}}^{mathbf{+}} from Jupiter’s polar regions","authors":"Jian-zhao Wang, Fran Bagenal, Jamey R. Szalay, Philip W. Valek, Ali H. Sulaiman, Licia C. Ray, Bertrand Bonfond, Robert J. Wilson, Robert W. Ebert, Frederic Allegrini, George Clark, Thomas K. Kim, Jack H. Waite","doi":"10.1038/s41550-026-02950-2","DOIUrl":"https://doi.org/10.1038/s41550-026-02950-2","url":null,"abstract":"Trihydrogen cations ({{rm{H}}}_{3}^{+}{{rm{H}}}_{3}^{+}), a key diagnostic of atmospheric energy balance, are produced through ionization by solar radiation and particle impacts in hydrogen-rich planetary atmospheres. At Jupiter, {{rm{H}}}_{3}^{+}{{rm{H}}}_{3}^{+} is produced most efficiently in the auroral region through electron precipitation and has a leading role in magnetosphere–ionosphere coupling by regulating ionospheric conductance. Previously, the properties of {{rm{H}}}_{3}^{+}{{rm{H}}}_{3}^{+} have been determined from remote sensing, with plasma parameters retrieved from its infrared emissions, although these measurements are limited by line-of-sight integration and restricted altitude resolution. Here we report the unambiguous, direct in situ detection of {{rm{H}}}_{3}^{+}{{rm{H}}}_{3}^{+} plasma in the auroral region. Furthermore, intermittent {{rm{H}}}_{3}^{+}{{rm{H}}}_{3}^{+} outflows are measured high above the ionosphere, with upwards velocities exceeding Jupiter’s escape speed, confirming atmospheric escape of {{rm{H}}}_{3}^{+}{{rm{H}}}_{3}^{+}. We propose that {{rm{H}}}_{3}^{+}{{rm{H}}}_{3}^{+} outflow originates in the auroral upwards electric current region, initially triggered by plasma-wave interactions and subsequently accelerated by the electric potential structure above the ionosphere. This study reveals a {{rm{H}}}_{3}^{+}{{rm{H}}}_{3}^{+}-mediated pathway for mass and energy transfer between the ionosphere and magnetosphere of Jupiter, constituting an atmospheric escape with a loss rate of order 1026 s−1. Similar mechanisms may operate at other planets with infrared aurorae and strong magnetic fields.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"17 1","pages":""},"PeriodicalIF":14.1,"publicationDate":"2026-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148728963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

BlackHolistic 2026 BlackHolistic 2026

IF 15.2 1区物理与天体物理

Nature Astronomy Pub Date : 2026-08-13 DOI: 10.1038/s41550-026-02941-3

Rob Fender, Jane Dai, Erin Kara, Sera Markoff, Francesca Panessa, Jiri Svoboda, Heino Falcke

引用次数: 0

Chemical fingerprints of binary mass transfer in massive stars 大质量恒星中二元质量传递的化学指纹图谱

IF 14.1 1区物理与天体物理

Nature Astronomy Pub Date : 2026-08-12 DOI: 10.1038/s41550-026-02943-1

Harim Jin, Norbert Langer

{"title":"Chemical fingerprints of binary mass transfer in massive stars","authors":"Harim Jin, Norbert Langer","doi":"10.1038/s41550-026-02943-1","DOIUrl":"https://doi.org/10.1038/s41550-026-02943-1","url":null,"abstract":"The majority of massive stars are born in close binary systems. As stars expand when they age, mass transfer or even a merger with their companion is inevitable. However, most binary interaction products appear as single stars, such that the main evidence of their exciting past is lost. Here, in a comprehensive grid of detailed massive binary evolution models, we find systematic trends in chemical surface abundances that allow the identification of the past mass gainers. We develop an analytic framework that is independent of specific evolutionary models, to constrain the amount and composition of the accreted material from their observed surface abundances. This yields tight constraints on the uncertain mass transfer physics in massive binary stars and allows us to reconstruct the past evolutionary history of the progenitor binary system. This method, which is shown to also constrain binary mergers (for example, SN 1987A), is applied to some of the best-studied OB stars so far. For γ Columbae, suggested to be an envelope-stripped star, we show that it is a mass gainer instead, whose companion star probably formed a stripped-envelope supernova. Our results highlight surface abundance measurements as a powerful tool to improve our understanding of massive binary systems evolving towards supernovae and compact object binaries.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"26 1","pages":""},"PeriodicalIF":14.1,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148728966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Widespread corrugations superimposed on the Galactic warp in the outer CO disk 广泛的波纹叠加在外层CO盘的银河曲上

IF 15.2 1区物理与天体物理

Nature Astronomy Pub Date : 2026-08-07 DOI: 10.1038/s41550-026-02938-y

Yan Sun, Shaobo Zhang, Ji Yang, Yang Su, Qing-Zeng Yan, Xin Zhou, Xuepeng Chen, Min Fang, Fujun Du

{"title":"Widespread corrugations superimposed on the Galactic warp in the outer CO disk","authors":"Yan Sun, Shaobo Zhang, Ji Yang, Yang Su, Qing-Zeng Yan, Xin Zhou, Xuepeng Chen, Min Fang, Fujun Du","doi":"10.1038/s41550-026-02938-y","DOIUrl":"10.1038/s41550-026-02938-y","url":null,"abstract":"Vertical corrugations—wave-like undulations in galactic disks—are potential imprints of past dynamical events that offer key constraints on galaxy evolution. While large-scale corrugations superimposed on the Galactic warp have recently been detected using young stellar tracers, the corresponding widespread structure within the molecular gas remains largely unexplored due to the challenge of disentangling subtle amplitudes from the dominant warp signal. By analysing over 30,000 molecular clouds from the Milky Way Imaging Scroll Painting survey, we systematically characterize widespread corrugations across the outer CO disk. After subtracting a global CO warp model, residual vertical displacements reveal coherent wave-like structures spanning much of the outer disk. Quantitative modelling yields characteristic vertical amplitudes of ~100–200 pc and radial wavelengths of ~3.9–7.9 kpc, and identifies a coherent azimuthal corrugation mode with a 52.6° (~11.6 kpc) wavelength at Galactocentric radius R ≈ 12.7 kpc, extending ~40 kpc. These findings provide direct evidence that vertical corrugations are a common large-scale feature of the outer Galactic molecular disk, offering insights into the three-dimensional structure and dynamics of spiral galaxies. Using more than 30,000 molecular clouds, this study reveals widespread wave-like corrugations superimposed on the warp of the Milky Way’s outer molecular disk, offering insight into its three-dimensional structure and dynamics.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"10 10","pages":"1560-1569"},"PeriodicalIF":15.2,"publicationDate":"2026-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148693510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A high-significance detection of primordial tidal torque imprints 原始潮汐扭矩印记的高显著性检测

IF 14.1 1区物理与天体物理

Nature Astronomy Pub Date : 2026-08-05 DOI: 10.1038/s41550-026-02948-w

Ming-Jie Sheng, Hao-Ran Yu, Min Bao, Bing-Hang Chen, Fang-Na Shao, Qi Guo, Yan-Mei Chen, Huiyuan Wang, Ue-Li Pen, Jie Wang, Xiaohu Yang

引用次数: 0

A discrete picture of magnetic fields in microquasar jets 微类星体喷流中磁场的离散图像

IF 15.2 1区物理与天体物理

Nature Astronomy Pub Date : 2026-07-29 DOI: 10.1038/s41550-026-02935-1

Ildar Khabibullin

引用次数: 0

Primary evaporite in southern Utopia Planitia on Mars from Zhurong rover observations 朱荣火星车观测火星乌托邦平原南部的原生蒸发岩

IF 15.2 1区物理与天体物理

Nature Astronomy Pub Date : 2026-07-29 DOI: 10.1038/s41550-026-02917-3

Jiacheng Liu, Bo Wu, Wenyuan Gao, James W. Head III, Joseph R. Michalski, Mei-Fu Zhou, Anthony E. Williams-Jones, Xingao Hou, Zongcheng Ling, Zhongchen Wu, Changqing Liu, Yuqi Qian, Honglei Lin, Sen Hu, Yu Sun, Wei Tan, Xiao Wang, Guochun Zhao

{"title":"Primary evaporite in southern Utopia Planitia on Mars from Zhurong rover observations","authors":"Jiacheng Liu, Bo Wu, Wenyuan Gao, James W. Head III, Joseph R. Michalski, Mei-Fu Zhou, Anthony E. Williams-Jones, Xingao Hou, Zongcheng Ling, Zhongchen Wu, Changqing Liu, Yuqi Qian, Honglei Lin, Sen Hu, Yu Sun, Wei Tan, Xiao Wang, Guochun Zhao","doi":"10.1038/s41550-026-02917-3","DOIUrl":"10.1038/s41550-026-02917-3","url":null,"abstract":"The Zhurong rover has identified a layer consisting of platy rocks enriched in hydrous minerals on a ~0.76-Ga surface in southern Utopia Planitia, indicating unexpected recent aqueous activity on Mars. The exact type of these hydrous minerals has remained uncertain, inhibiting our understanding of the aqueous processes and potential habitability on recent Mars. Here we document unique decimetre-scale crystal morphologies observed by the Zhurong rover within the 5–10-cm-thick surface layer, indicative of euhedral selenite, a distinctive variety of gypsum. We interpret it as a signature of primary evaporite, distinct from previously identified sulfate deposits on Mars, which can only form in the presence of surface water with a cumulative water-equivalent column over time of at least 6.25–25 m. This cumulative thickness could have been achieved by either sustained or episodic upwelling of saline groundwater driven by magmatic activity into a very shallow, mostly ice-covered surface water body, whereas at any given time the actual liquid water layer would probably have been on the order of a metre or less. The large crystals of gypsum var. selenite are likely to contain abundant fluid inclusions—microscale pockets of ancient brine that could provide a unique window into the geochemical and potentially even biological environment of the Martian subsurface during the Amazonian period. China’s Zhurong rover has discovered long-sought primary evaporites in ~0.76-Ga-old rocks during its traverse in southern Utopia Planitia on Mars. Trapped fluids within them could preserve crucial clues to the planet’s past environment and habitability.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"10 10","pages":"1500-1508"},"PeriodicalIF":15.2,"publicationDate":"2026-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148612598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vigorous turbulence driven by quasar-mode feedback in a cluster core 星团核心中由类星体模式反馈驱动的剧烈乱流

IF 14.1 1区物理与天体物理

Nature Astronomy Pub Date : 2026-07-28 DOI: 10.1038/s41550-026-02939-x

Satoshi Yamada, Shutaro Ueda, Hirofumi Noda, Yutaka Fujita, Misaki Mizumoto, Kentaro Nagamine, Claudio Ricci, Shoji Ogawa, Taiki Kawamuro, Shinya Yamada, Yuichi Terashima, Yoshihiro Ueda

{"title":"Vigorous turbulence driven by quasar-mode feedback in a cluster core","authors":"Satoshi Yamada, Shutaro Ueda, Hirofumi Noda, Yutaka Fujita, Misaki Mizumoto, Kentaro Nagamine, Claudio Ricci, Shoji Ogawa, Taiki Kawamuro, Shinya Yamada, Yuichi Terashima, Yoshihiro Ueda","doi":"10.1038/s41550-026-02939-x","DOIUrl":"https://doi.org/10.1038/s41550-026-02939-x","url":null,"abstract":"Quasars are among the most luminous objects. They are powered by accretion onto supermassive black holes. They are thought to impact cosmological evolution primarily through energetic winds, known as quasar-mode feedback, yet the efficiency and spatial extent of this process remain poorly constrained. Here we present X-Ray Imaging and Spectroscopy Mission (XRISM) observations of H1821+643—the nearest galaxy cluster with a central quasar (redshift z = 0.297)—which was a rare opportunity to directly probe quasar-mode feedback in the intracluster medium. High-resolution spectroscopy reveals exceptionally broadened Fe XXV emission lines from the intracluster medium, with a velocity dispersion of approximately 300 km s−1, far exceeding values observed in nearby cluster cores. These lines originate predominantly at radii of 20–100 kpc from the centre. Assuming that turbulence from a quasar-driven shock led to the broadening of the lines, the energy injected by the quasar beyond galactic scales (≳20 kpc) is estimated to be ≳1–10% of its radiative energy. Notably, this feedback efficiency exceeds previous multiwavelength estimates by orders of magnitude (≲0.01%) and reaches the levels required by the latest cosmological hydrodynamical simulations. This finding of vigorous turbulence indicates that quasar-mode feedback plays a central role in regulating galaxy and cluster evolution at high redshift.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"43 1","pages":""},"PeriodicalIF":14.1,"publicationDate":"2026-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148612599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-adiabatic entropy increase in the solar wind governed by velocity spikes 太阳风中由速度峰值控制的非绝热熵增加

IF 15.2 1区物理与天体物理

Nature Astronomy Pub Date : 2026-07-28 DOI: 10.1038/s41550-026-02923-5

Chuanpeng Hou, Jiansen He, Alexis P. Rouillard, Chuan Li, Shihao Rao, Xingyu Zhu, Ziqi Wu, Daniel Verscharen, Zesen Huang, Liping Yang, Xiangjing Xu

{"title":"Non-adiabatic entropy increase in the solar wind governed by velocity spikes","authors":"Chuanpeng Hou, Jiansen He, Alexis P. Rouillard, Chuan Li, Shihao Rao, Xingyu Zhu, Ziqi Wu, Daniel Verscharen, Zesen Huang, Liping Yang, Xiangjing Xu","doi":"10.1038/s41550-026-02923-5","DOIUrl":"10.1038/s41550-026-02923-5","url":null,"abstract":"The solar wind cools more slowly than adiabatic expansion predicts, implying the presence of an additional heat source. A key unknown is the physical carriers that transport energy into the solar wind. Here we track the same fast solar wind stream from its source to Earth’s orbit. Using a rare quasi-radial alignment of Solar Orbiter near 0.38 au and wind near 1 au, together with remote sensing from Chinese Hα Solar Explorer and Solar Dynamics Observatory, we show that intermittent velocity spikes are the dominant energy carriers that drive the solar wind’s non-adiabatic evolution. These spikes dissipate during propagation, reducing the cooling rate and increasing plasma entropy. The resulting temperature and entropy at 1 au are in good agreement with predictions from Alfvénic turbulence theory. The solar wind source region shows abundant magnetic reconnection activity, probably providing the initial fluctuations that seed the formation of velocity spikes. Our results provide observational constraints on how intermittent velocity spikes and Alfvénic turbulence shape the thermodynamic evolution of collisionless plasmas in the heliosphere. By tracking the same fast solar wind stream from Solar Orbiter to Earth, this study shows that intermittent velocity spikes transport energy and contribute to entropy increase, helping explain why the solar wind cools more slowly than adiabatic expansion predicts.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"10 10","pages":"1467-1477"},"PeriodicalIF":15.2,"publicationDate":"2026-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148612600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0