Nature Astronomy最新文献_第10页

The shallow subsurface heterogeneities of asteroid Ryugu revealed by its gravity field 龙宫小行星浅层地下非均质性的重力场揭示

IF 15.2 1区物理与天体物理

Nature Astronomy Pub Date : 2026-06-30 DOI: 10.1038/s41550-026-02908-4

Wutong Gao, Jianguo Yan, Jian-Yang Li, Denggao Qiu, Mohamed Ramy El-Maarry, Sho Sasaki, Jean-Pierre Barriot

{"title":"The shallow subsurface heterogeneities of asteroid Ryugu revealed by its gravity field","authors":"Wutong Gao, Jianguo Yan, Jian-Yang Li, Denggao Qiu, Mohamed Ramy El-Maarry, Sho Sasaki, Jean-Pierre Barriot","doi":"10.1038/s41550-026-02908-4","DOIUrl":"10.1038/s41550-026-02908-4","url":null,"abstract":"Small celestial bodies provide key insights into the formation and evolution of the Solar System, as their internal structures retain records of the early planetary environment. However, direct measurements of their gravity fields are rare, limiting our understanding of their internal composition. Here we report the gravity field of asteroid (162173) Ryugu from Hayabusa2 laser altimetry and image landmark tracking data. By comparing the estimated gravity field with a constant-density gravity model, we reveal a distinct west–east dichotomy, characterized by significant surface gravity anomalies concentrated in the western hemisphere. We interpret these signals as evidence for shallow subsurface density variations plausibly arising from heterogeneous reaccumulation of parent-body fragments and/or asymmetric alteration by spin-driven surface processes. Comparison with asteroid (101955) Bennu suggests that these two rubble-pile bodies may have experienced divergent evolutionary pathways, leading to their heterogeneous density patterns. Our findings revealed that seemingly similar rubble-pile asteroids can have distinct internal structures shaped by their specific dynamical histories, providing new insights for understanding their diversity and informing future exploration missions. The gravity field of asteroid Ryugu is estimated using Hayabusa2 mission data. A significant surface gravity anomaly in the west indicates shallow subsurface density variations, possibly shaped by past spin-driven asymmetric deformation.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"10 9","pages":"1292-1300"},"PeriodicalIF":15.2,"publicationDate":"2026-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148385800","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

The Universe as a lens for finding meaning at home 宇宙是一个寻找家庭意义的镜头

IF 15.2 1区物理与天体物理

Nature Astronomy Pub Date : 2026-06-29 DOI: 10.1038/s41550-026-02926-2

May Chiao

引用次数: 0

Seismic evidence for a melt-depleted lower crust and transcrustal magmatism on Mars 火星下地壳融化耗尽和跨地壳岩浆活动的地震证据

IF 15.2 1区物理与天体物理

Nature Astronomy Pub Date : 2026-06-26 DOI: 10.1038/s41550-026-02907-5

T. Mackay-Champion, M. Anderson Loake, R. Palin, J. Wade, J.-M. Kendall

{"title":"Seismic evidence for a melt-depleted lower crust and transcrustal magmatism on Mars","authors":"T. Mackay-Champion, M. Anderson Loake, R. Palin, J. Wade, J.-M. Kendall","doi":"10.1038/s41550-026-02907-5","DOIUrl":"10.1038/s41550-026-02907-5","url":null,"abstract":"The crust of Mars preserves a record of early planetary evolution in the absence of plate tectonics, offering crucial insights into the development of terrestrial planets. Seismic data from NASA’s InSight mission reveal a stratified crust with an intracrustal seismic discontinuity at ~24 km, overlying the crust–mantle boundary at ~38 km. The nature of this intracrustal discontinuity remains unresolved. Here, however, using phase equilibrium modelling integrated with petrophysics and Bayesian statistics, we show that it marks a transition from mafic to ultramafic lithologies and interpret the lowermost ultramafic layer as a ~14-km-thick melt-depleted cumulate zone overlying the petrologic crust–mantle boundary. Thermal modelling indicates that such a melt-depleted layer could not have formed under ambient temperature conditions; instead, it requires an elevated heat flow probably driven by mantle upwelling and magmatic intrusion, promoting magmatic differentiation and partial melting within the crust. Together with prior evidence for evolved melts and upper-crustal differentiation, our results indicate that Mars once hosted vertically integrated transcrustal magmatic systems akin to those common on Earth. This demonstrates that these systems and their attendant geochemical differentiation can form without plate tectonics, offering a universal mechanism for building secondary and tertiary crust on hot rocky planets. Seismic data from NASA’s InSight mission reveal a melt-depleted lower crust on Mars and indicate that Earth-like, vertically integrated, transcrustal magmatic systems and associated crustal differentiation can occur on stagnant lid planets.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"10 9","pages":"1301-1308"},"PeriodicalIF":15.2,"publicationDate":"2026-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41550-026-02907-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148336455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new window on neutrino astronomy at cosmological distances 在宇宙距离上研究中微子天文学的新窗口

IF 15.2 1区物理与天体物理

Nature Astronomy Pub Date : 2026-06-26 DOI: 10.1038/s41550-026-02904-8

引用次数: 0

Pulsed radio emission from a central compact object 从中心致密物体发出的脉冲无线电发射

IF 15.2 1区物理与天体物理

Nature Astronomy Pub Date : 2026-06-25 DOI: 10.1038/s41550-026-02899-2

Lei Zhang 张蕾, Alessandro Ridolfi, Di Li 李菂, Erbil Gügercinoğlu, Fernando Camilo, Wynn C. G. Ho, Matthew Bailes, Ping Zhou 周平, Craig O. Heinke, Marcus E. Lower

{"title":"Pulsed radio emission from a central compact object","authors":"Lei Zhang 张蕾, Alessandro Ridolfi, Di Li 李菂, Erbil Gügercinoğlu, Fernando Camilo, Wynn C. G. Ho, Matthew Bailes, Ping Zhou 周平, Craig O. Heinke, Marcus E. Lower","doi":"10.1038/s41550-026-02899-2","DOIUrl":"10.1038/s41550-026-02899-2","url":null,"abstract":"Located at the centres of supernova remnants, central compact objects (CCOs) are among the most puzzling neutron stars. CCOs are bright in thermal X-rays, yet have evaded detection by major radio telescopes for decades, giving rise to the view that they are intrinsically radio-quiet and possess exceptionally weak magnetic fields. Here we show that the prototypical young CCO 1E 1207.4–5209 is in fact a faint radio pulsar rotating at the 0.4-s X-ray period. Analysis of its polarization indicates that the radio beam intersects our line of sight near the magnetic pole, affirming that its radio faintness is intrinsic. Once its supernova remnant dissipates, this source would be misidentified as an apparently gigayear-old pulsar. The CCO’s low radio flux density may explain why many supernova remnants lack detectable radio pulsars and suggests a hidden population of young, slowly rotating neutron stars. The young neutron star 1E 1207.4–5209 is the central compact object of its supernova remnant. Using the sensitive MeerKAT array, it has now been detected at radio wavelengths, suggesting that other central compact objects might also be radio pulsars.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"10 9","pages":"1345-1352"},"PeriodicalIF":15.2,"publicationDate":"2026-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148336458","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 potential intrinsic magnetic field for the Neptunian moon Triton 海王星卫星海卫一的潜在固有磁场

IF 15.2 1区物理与天体物理

Nature Astronomy Pub Date : 2026-06-23 DOI: 10.1038/s41550-026-02869-8

引用次数: 0

Ram-pressure stripping caught in action in a young cluster at z = 2.51 撞击压力剥离在z = 2.51的年轻星团中发生

IF 15.2 1区物理与天体物理

Nature Astronomy Pub Date : 2026-06-22 DOI: 10.1038/s41550-026-02892-9

Ke Xu, Tao Wang, Emanuele Daddi, David Elbaz, Hanwen Sun, Longyue Chen, Qiaoyang Hao, Raphael Gobat, Anita Zanella, Daizhong Liu, Mengyuan Xiao, Renyue Cen, Tadayuki Kodama, Kotaro Kohno, Tiancheng Yang, Can Xu, Zhi-Yu Zhang, Luwenjia Zhou, Francesco Valentino

{"title":"Ram-pressure stripping caught in action in a young cluster at z = 2.51","authors":"Ke Xu, Tao Wang, Emanuele Daddi, David Elbaz, Hanwen Sun, Longyue Chen, Qiaoyang Hao, Raphael Gobat, Anita Zanella, Daizhong Liu, Mengyuan Xiao, Renyue Cen, Tadayuki Kodama, Kotaro Kohno, Tiancheng Yang, Can Xu, Zhi-Yu Zhang, Luwenjia Zhou, Francesco Valentino","doi":"10.1038/s41550-026-02892-9","DOIUrl":"10.1038/s41550-026-02892-9","url":null,"abstract":"Galaxy clusters in the local Universe are dominated by massive quiescent galaxies with old ages, formed at high redshifts. Whether their quenching is driven by internal processes or environmental effects is a matter of debate that has been challenging to resolve due to the lack of observations during their peak formation epoch. Here we report clear evidence from the Atacama Large Millimeter/submillimeter Array of extended and elongated gas tails in five galaxies in a forming cluster at z = 2.51. The single-tailed gas distributions, which extend notably beyond the stellar emission probed by JWST in galaxies that are relatively isolated and lack signatures of mergers or interactions (features that are very uncommon in the field), provide evidence of ram-pressure stripping. These very distant confirmed cases of ram-pressure stripping highlight the critical role of environmental effects in gas removal at high redshifts, an often-overlooked quenching pathway. Ram-pressure stripping in a distant galaxy protocluster at z = 2.51 reveals that the dense intracluster medium was already removing star-forming fuel from galaxies just 3 billion years after the Big Bang.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"10 8","pages":"1208-1217"},"PeriodicalIF":15.2,"publicationDate":"2026-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41550-026-02892-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148290372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Queer in astronomy 天文学中的奇怪现象

IF 15.2 1区物理与天体物理

Nature Astronomy Pub Date : 2026-06-19 DOI: 10.1038/s41550-026-02891-w

Isa Cox, Charlotte Olsen, Jenny Calahan

引用次数: 0

The genealogy of the stars 星星的家谱

IF 15.2 1区物理与天体物理

Nature Astronomy Pub Date : 2026-06-19 DOI: 10.1038/s41550-026-02920-8

引用次数: 0

Polymeric organics in primitive asteroids and their potential roles in chemical evolution 原始小行星中的聚合有机物及其在化学演化中的潜在作用

IF 15.2 1区物理与天体物理