Nature Astronomy最新文献_第4页

Rewinding the chemical clock to cosmic noon 把化学时钟倒转到宇宙正午

IF 14.3 1区物理与天体物理

Nature Astronomy Pub Date : 2025-08-18 DOI: 10.1038/s41550-025-02643-2

Bokyoung Kim

引用次数: 0

Rubin’s Universe 红宝石是世界

IF 14.3 1区物理与天体物理

Nature Astronomy Pub Date : 2025-08-18 DOI: 10.1038/s41550-025-02644-1

Bokyoung Kim

引用次数: 0

H is for hydrocarbon H代表碳氢化合物

IF 14.3 1区物理与天体物理

Nature Astronomy Pub Date : 2025-08-18 DOI: 10.1038/s41550-025-02642-3

Paul Woods

引用次数: 0

Challenges to the cosmological constant model following results from the Dark Energy Survey 暗能量调查结果对宇宙常数模型的挑战

IF 14.3 1区物理与天体物理

Nature Astronomy Pub Date : 2025-08-18 DOI: 10.1038/s41550-025-02618-3

Santiago Avila, Juan Mena-Fernández, Maria Vincenzi

引用次数: 0

The star-crossed paths of the Milky Way and Andromeda 银河系和仙女座星形交叉的轨迹

IF 14.3 1区物理与天体物理

Nature Astronomy Pub Date : 2025-08-18 DOI: 10.1038/s41550-025-02629-0

Andreea S. Font

引用次数: 0

Looking beyond lambda 超越lambda

IF 14.3 1区物理与天体物理

Nature Astronomy Pub Date : 2025-08-18 DOI: 10.1038/s41550-025-02627-2

Alexie Leauthaud, Adam Riess

{"title":"Looking beyond lambda","authors":"Alexie Leauthaud, Adam Riess","doi":"10.1038/s41550-025-02627-2","DOIUrl":"10.1038/s41550-025-02627-2","url":null,"abstract":"Widening cracks are appearing in the Λ cold dark matter (ΛCDM) model (where Λ is the cosmological constant) and it is becoming increasingly clear that the standard cosmological model struggles to describe the full expansion history of the Universe as revealed by the cosmic microwave background, baryon acoustic oscillation measurements, and locally calibrated type Ia supernovae. Taken at face value, recent results suggest a dark sector that may be more complex than commonly assumed. We must prepare for the possibility of moving beyond the ΛCDM era, where merely testing if the dark energy equation of state w = −1 is no longer sufficient, and embrace the challenge of unravelling the physics of dark matter, dark energy and gravity on cosmic scales. Guided by increasingly robust data—secured through considerable investment—we should pursue deeper understanding while being open to complexity in the dark sector, rather than settling for the simplest phenomenology. Data from new facilities and a new Dark Energy Task Force could help illuminate the path forward while changes to our scientific practices will be essential to navigate the potentially rocky road ahead. The Dark Energy Spectroscopic Survey’s latest results indicate a tension between observations and the cosmological constant model of dark energy. This Perspective puts these findings in context and suggests a way forward for dark energy research.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"9 8","pages":"1123-1128"},"PeriodicalIF":14.3,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144900149","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

Scientific change demands new ways to collaborate 科学变革需要新的合作方式

IF 14.3 1区物理与天体物理

Nature Astronomy Pub Date : 2025-08-18 DOI: 10.1038/s41550-025-02648-x

引用次数: 0

A tapestry of gravitational waveforms to study black hole mergers 研究黑洞合并的引力波形织锦

IF 14.3 1区物理与天体物理

Nature Astronomy Pub Date : 2025-08-18 DOI: 10.1038/s41550-025-02630-7

Zack Carson

引用次数: 0

Constraints on axion-like particles from active galactic nuclei seen through galaxy clusters 通过星系团观测到的活动星系核对轴子样粒子的约束

IF 14.3 1区物理与天体物理

Nature Astronomy Pub Date : 2025-08-15 DOI: 10.1038/s41550-025-02621-8

Denys Malyshev, Lidiia Zadorozhna, Yuriy Bidasyuk, Andrea Santangelo, Oleg Ruchayskiy

{"title":"Constraints on axion-like particles from active galactic nuclei seen through galaxy clusters","authors":"Denys Malyshev, Lidiia Zadorozhna, Yuriy Bidasyuk, Andrea Santangelo, Oleg Ruchayskiy","doi":"10.1038/s41550-025-02621-8","DOIUrl":"10.1038/s41550-025-02621-8","url":null,"abstract":"Hypothetical axion-like particles (ALPs) are of interest because of their potential to act as dark matter or to reveal information about yet undiscovered fundamental constituents of matter. Such particles may be created when photons traverse regions of magnetic fields. The conversion probability depends on both the magnetic field parameters and the photon energy, leading to several spectral absorption features as light passes through magnetized regions. Traditionally, astrophysical searches have focused on detecting such features in individual objects. However, our limited understanding of the properties of cosmic magnetic fields has hindered progress. Here we introduce a new approach based on analysing the stacked (rather than individual) spectra of active galactic nuclei behind galaxy clusters, which are gigantic magnetic field reservoirs. Stacking efficiently averages over the uncertainties in magnetic fields, predicting a distinct step-like spectral signature of photon-to-ALP conversion. With this approach, we advance into previously inaccessible regions of the ALP parameter space for nano-electronvolt masses. Adopting this method using data from different telescopes and increasing the size of the stacked datasets will significantly improve existing bounds across a wide range of masses. The Cherenkov Telescope Array Observatory will enable this method to probe a broad region of parameter space where ALPs could serve as dark matter. A new method for detecting axion-like particles through stacked spectra of active galactic nucleus–galaxy-cluster pairs probes previously inaccessible regions of their parameter space.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"9 9","pages":"1387-1395"},"PeriodicalIF":14.3,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.comhttps://www.nature.com/articles/s41550-025-02621-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851694","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

Extended enriched gas in a multi-galaxy merger at redshift 6.7 在红移6.7的多星系合并中扩展的富集气体

IF 14.1 1区物理与天体物理

Nature Astronomy Pub Date : 2025-08-15 DOI: 10.1038/s41550-025-02636-1

Weida Hu, Casey Papovich, Lu Shen, Zixuan Peng, L. Y. Aaron Yung, Brian C. Lemaux, Justin Spilker, Justin Cole

{"title":"Extended enriched gas in a multi-galaxy merger at redshift 6.7","authors":"Weida Hu, Casey Papovich, Lu Shen, Zixuan Peng, L. Y. Aaron Yung, Brian C. Lemaux, Justin Spilker, Justin Cole","doi":"10.1038/s41550-025-02636-1","DOIUrl":"https://doi.org/10.1038/s41550-025-02636-1","url":null,"abstract":"Recent JWST observations have uncovered high-redshift galaxies characterized by multiple star-forming clumps, many of which appear to be undergoing mergers. Such mergers, especially those of two galaxies with equivalent masses, play a critical role in driving galaxy evolution and regulating the chemical composition of their environments. Here we report a major merger of at least 5 galaxies, dubbed JWST’s Quintet (JQ), at redshift 6.7. This system resides in a small area of approximately 4.5″ × 4.5″ (24.6 × 24.6 pkpc2), containing over 17 galaxy-size clumps with a total stellar mass of 1010 M⊙. JQ has a total star formation rate of 255 M⊙ yr−1, placing it approximately 1 dex above the star formation rate–mass main sequence at this epoch. The high mass and star formation rate of JQ are consistent with the star formation history of those unexpected massive quiescent galaxies observed at redshift 4–5, offering a plausible evolutionary pathway for the formation of such galaxies. We also detect a large [O iii] + Hβ gaseous halo surrounding and connecting four galaxies in JQ, suggesting the existence of metals in the surrounding medium—the inner part of its circumgalactic medium. This provides direct evidence for metal enrichment of galaxies’ environments through merger-induced tidal stripping, just 800 Myr after the Big Bang.","PeriodicalId":18778,"journal":{"name":"Nature Astronomy","volume":"23 1","pages":""},"PeriodicalIF":14.1,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851396","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