The Astrophysical Journal Letters最新文献_第7页

Evolution of Cluster Alignments as Evidence of Large-scale Structure Formation in the Universe 星团排列的演化是宇宙大尺度结构形成的证据

The Astrophysical Journal Letters Pub Date : 2025-07-06 DOI: 10.3847/2041-8213/ade66d

Michael J. West, Roberto De Propris, Maret Einasto, Z. L. Wen and J. L. Han

引用次数: 0

Highly Polarized Type III Storm Observed with Parker Solar Probe 帕克太阳探测器观测到的高度极化III型风暴

The Astrophysical Journal Letters Pub Date : 2025-07-06 DOI: 10.3847/2041-8213/ade5a8

Marc Pulupa, Stuart D. Bale, Immanuel Christopher Jebaraj, Orlando Romeo and Säm Krucker

{"title":"Highly Polarized Type III Storm Observed with Parker Solar Probe","authors":"Marc Pulupa, Stuart D. Bale, Immanuel Christopher Jebaraj, Orlando Romeo and Säm Krucker","doi":"10.3847/2041-8213/ade5a8","DOIUrl":"https://doi.org/10.3847/2041-8213/ade5a8","url":null,"abstract":"The Parker Solar Probe (PSP) spacecraft observed a large coronal mass ejection (CME) on 2022 September 5, shortly before closest approach during the 13th PSP solar encounter. For several days following the CME, PSP detected a storm of Type III radio bursts. Stokes parameter analysis of the radio emission indicates that the Type III storm was highly circularly polarized (with fractional polarization up to ∼0.4). Left-hand circularly polarized (LHC) emission dominated at the start of the storm, transitioning to right-hand circularly polarized (RHC) emission at the crossing of the heliospheric current sheet on September 6. We analyze the properties of this Type III storm. The drift rate of the Type IIIs indicates a constant beam speed of ∼0.1c, typical for Type III-producing electron beams. The sense of polarization is consistent with fundamental emission generated primarily in the O-mode. The stable and well organized post-CME magnetic field neatly separates the LHC- and RHC-dominated intervals of the storm, with minimal overlap between the senses of polarization. The proximity of PSP to the source region, both in radial distance and in heliographic longitude, makes this event an ideal case study to connect in situ plasma measurements with remote observations of radio emission.","PeriodicalId":501814,"journal":{"name":"The Astrophysical Journal Letters","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578218","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

An Extremely Metal-poor Lyα Emitter Candidate at z = 6 Revealed through Absorption Spectroscopy 利用吸收光谱法发现z = 6处极贫金属Lyα发射候选体

The Astrophysical Journal Letters Pub Date : 2025-07-06 DOI: 10.3847/2041-8213/ade71c

Dominika Ďurovčíková, Anna-Christina Eilers, Robert A. Simcoe, Louise Welsh, Romain A. Meyer, Jorryt Matthee, Emma V. Ryan-Weber, Minghao Yue, Harley Katz, Sindhu Satyavolu, George Becker, Frederick B. Davies and Emanuele Paolo Farina

{"title":"An Extremely Metal-poor Lyα Emitter Candidate at z = 6 Revealed through Absorption Spectroscopy","authors":"Dominika Ďurovčíková, Anna-Christina Eilers, Robert A. Simcoe, Louise Welsh, Romain A. Meyer, Jorryt Matthee, Emma V. Ryan-Weber, Minghao Yue, Harley Katz, Sindhu Satyavolu, George Becker, Frederick B. Davies and Emanuele Paolo Farina","doi":"10.3847/2041-8213/ade71c","DOIUrl":"https://doi.org/10.3847/2041-8213/ade71c","url":null,"abstract":"We report the discovery of a Lyα emitter (LAE) candidate in the immediate foreground of the quasar PSO J158-14 at zQSO = 6.0685 at a projected distance ∼29 pkpc that is associated with an extremely metal-poor absorption system. This system was found in archival observations of the quasar field with the Very Large Telescope (VLT)/Multi-Unit Spectroscopic Explorer (MUSE) and was previously missed in searches of absorption systems using quasar absorption line spectroscopy, as it imparts no detectable metal absorption lines on the background quasar spectrum. The detected Lyα emission line at a redshift of zLAE = 6.0323 is well aligned with the outer edge of the quasar’s proximity zone and can plausibly cause its observed damping wing if it is associated with a proximate subdamped Lyα absorption system with a column density of . A >10 hr medium-resolution spectrum of the quasar observed with the Magellan/Folded-port InfraRed Echellette (FIRE) and VLT/X-Shooter spectrographs reveals a metallicity constraint of [Z/H] < −3. Such low metallicity makes this system an extremely metal-poor galaxy candidate and provides an exciting site to study possible signatures of Population III stars.","PeriodicalId":501814,"journal":{"name":"The Astrophysical Journal Letters","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144586554","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

A New High-latitude H i Cloud Complex Entrained in the Northern Fermi Bubble 北费米气泡中携带的一个新的高纬度H云复合体

The Astrophysical Journal Letters Pub Date : 2025-07-06 DOI: 10.3847/2041-8213/addd16

Rongmon Bordoloi, Andrew J. Fox and Felix J. Lockman

引用次数: 0

Optical+Near-IR Analysis of a Newly Confirmed Einstein Ring at z ∼ 1 from the Kilo-Degree Survey: Dark Matter Fraction, Total and Dark Matter Density Slope, and Initial Mass Function* 来自千度巡天z ~ 1处新确认的爱因斯坦环的光学+近红外分析：暗物质分数、总密度和暗物质密度斜率以及初始质量函数*

The Astrophysical Journal Letters Pub Date : 2025-07-03 DOI: 10.3847/2041-8213/ade680

Rui Li, Nicola R. Napolitano, Giuseppe D’Ago, Vyacheslav N. Shalyapin, Kai Zhu, Xiaotong Guo, Ran Li, Léon V. E. Koopmans, Chiara Spiniello, Crescenzo Tortora, Francesco La Barbera, Haicheng Feng, Liang Gao, Zhiqi Huang, Koen Kuijken, Hui Li, Linghua Xie, Mario Radovich and Alexey Sergeyev

{"title":"Optical+Near-IR Analysis of a Newly Confirmed Einstein Ring at z ∼ 1 from the Kilo-Degree Survey: Dark Matter Fraction, Total and Dark Matter Density Slope, and Initial Mass Function*","authors":"Rui Li, Nicola R. Napolitano, Giuseppe D’Ago, Vyacheslav N. Shalyapin, Kai Zhu, Xiaotong Guo, Ran Li, Léon V. E. Koopmans, Chiara Spiniello, Crescenzo Tortora, Francesco La Barbera, Haicheng Feng, Liang Gao, Zhiqi Huang, Koen Kuijken, Hui Li, Linghua Xie, Mario Radovich and Alexey Sergeyev","doi":"10.3847/2041-8213/ade680","DOIUrl":"https://doi.org/10.3847/2041-8213/ade680","url":null,"abstract":"We report the spectroscopic confirmation of a bright blue Einstein ring in the Kilo-Degree Survey (KiDS) footprint: the Einstein “blue eye.” Spectroscopic data from X-Shooter at the Very Large Telescope (VLT) show that the lens is a typical early-type galaxy (ETG) at zl = 0.9906, while the background source is a Lyα emitter at zs = 2.823. The reference lens modeling was performed on a high-resolution Y-band adaptive-optics image from HAWK-I at VLT. Assuming a singular isothermal ellipsoid total mass density profile, we inferred an Einstein radius REin = 10.47 ± 0.06 kpc. The average slope of the total mass density inside the Einstein radius, as determined by a joint analysis of lensing and isotropic Jeans equations, is , showing no systematic deviation from the slopes of lower-redshift galaxies. This can be the evidence of ETGs developing through dry mergers plus moderate dissipationless accretion. Stellar population analysis with eight-band (griZYJHKs) photometries from KiDS and VIKING shows that the total stellar mass of the lens is M* = (3.95 ± 0.35) × 1011 M⊙ (Salpeter initial mass function (IMF)), implying a dark matter fraction inside the effective radius of fDM = 0.307 ± 0.151. We finally explored the dark matter halo slope and found a strong degeneracy with the dynamic stellar mass. Dark matter adiabatic contraction is needed to explain the posterior distribution of the slope, unless an IMF heavier than Salpeter is assumed.","PeriodicalId":501814,"journal":{"name":"The Astrophysical Journal Letters","volume":"8 1","pages":"L31"},"PeriodicalIF":0.0,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144565953","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

Observed Antiparallel Correlation between Spiral Galaxy and Cosmic Filament Spins 观察到的螺旋星系和宇宙丝自旋之间的反平行相关

The Astrophysical Journal Letters Pub Date : 2025-07-03 DOI: 10.3847/2041-8213/ade6fe

Hao-da Wang, 昊达汪, Peng Wang, 鹏王, Min Bao, 敏鲍, Yanmei Chen, 燕梅陈, Xiao-xiao Tang, 潇潇唐, Youcai Zhang, 友财张, Xi Kang, 熙康, Quan Guo, 铨郭, Ming-Jie Sheng, 明捷盛, Hao-Ran Yu and 浩然于

{"title":"Observed Antiparallel Correlation between Spiral Galaxy and Cosmic Filament Spins","authors":"Hao-da Wang, 昊达汪, Peng Wang, 鹏王, Min Bao, 敏鲍, Yanmei Chen, 燕梅陈, Xiao-xiao Tang, 潇潇唐, Youcai Zhang, 友财张, Xi Kang, 熙康, Quan Guo, 铨郭, Ming-Jie Sheng, 明捷盛, Hao-Ran Yu and 浩然于","doi":"10.3847/2041-8213/ade6fe","DOIUrl":"https://doi.org/10.3847/2041-8213/ade6fe","url":null,"abstract":"Understanding the origin of galactic angular momentum and its connection to the cosmic web remains a pivotal issue in galaxy formation. Using kinematic data from the MaNGA survey, we investigate the alignment between the spin directions of spiral galaxies and their host cosmic filaments. By incorporating filament spin measurements derived from redshift asymmetry across filament spines, we reveal a mass-dependent antiparallel correlation: low-mass spiral galaxies ( ) exhibit a statistically significant antiparallel alignment between their stellar/gas spins and filament spins, while high-mass spirals show no such trend. Spatial analysis further indicates that high-mass spirals preferentially reside near filament spines, whereas low-mass spirals occupy filament outskirts. These findings extend previous alignment studies that neglected directional spin correlations and provide new insights into how cosmic environments shape galactic angular momentum. The observed antiparallel trend suggests a critical role for filament spin in regulating the angular momentum acquisition of low-mass spirals. This antiparallel alignment is significantly enhanced for low-mass spirals residing in dynamically cold filaments, highlighting the importance of filament properties in shaping galaxy spin.","PeriodicalId":501814,"journal":{"name":"The Astrophysical Journal Letters","volume":"42 1","pages":"L30"},"PeriodicalIF":0.0,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144566576","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 Cosmic Microwave Background Optical Depth Constrains the Duration of Reionization 宇宙微波背景光学深度限制再电离持续时间

The Astrophysical Journal Letters Pub Date : 2025-07-02 DOI: 10.3847/2041-8213/ade141

Christopher Cain, Alexander Van Engelen, Kevin S. Croker, Darby Kramer, Anson D’Aloisio and Garett Lopez

{"title":"The Cosmic Microwave Background Optical Depth Constrains the Duration of Reionization","authors":"Christopher Cain, Alexander Van Engelen, Kevin S. Croker, Darby Kramer, Anson D’Aloisio and Garett Lopez","doi":"10.3847/2041-8213/ade141","DOIUrl":"https://doi.org/10.3847/2041-8213/ade141","url":null,"abstract":"Recently, it was pointed out that invoking a large value of the cosmic microwave background (CMB) optical depth, τCMB = 0.09, could help resolve tensions between Dark Energy Survey Instrument DR2 baryon acoustic oscillation data and the CMB. This is larger than the value of τCMB = 0.058 measured from the Planck low-ℓ polarization data. Traditionally, τCMB is thought of as a constraint on reionization’s midpoint. However, recent observations and modeling of the Lyα forest of high-z quasars at 5 < z < 6 have tightly constrained the timing of the last 10%–20% of reionization, adding nuance to this interpretation. Here, we point out that fixing reionization’s endpoint, in accordance with the latest Lyα forest constraints, renders τCMB a sensitive probe of the duration of reionization, as well as its midpoint. We compare low and high values of τCMB to upper limits on the patchy kinematic Sunyaev–Zel'dovich (pkSZ) effect, another CMB observable that constrains reionization’s duration, and find that a value of τCMB = 0.09 is in ≈2σ tension with existing limits on the pkSZ from the South Pole Telescope (SPT). The strength of this tension is sensitive to the choices involved in modeling the other CMB foregrounds in the SPT measurement, and in the modeling of the pkSZ signal itself.","PeriodicalId":501814,"journal":{"name":"The Astrophysical Journal Letters","volume":"54 1","pages":"L29"},"PeriodicalIF":0.0,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144566606","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

On the Formation of S stars from a Recent Massive Black Hole Merger in the Galactic Center 银河系中心最近一次大质量黑洞合并形成的S型恒星

The Astrophysical Journal Letters Pub Date : 2025-07-01 DOI: 10.3847/2041-8213/addc5d

Tatsuya Akiba, Smadar Naoz and Ann-Marie Madigan

{"title":"On the Formation of S stars from a Recent Massive Black Hole Merger in the Galactic Center","authors":"Tatsuya Akiba, Smadar Naoz and Ann-Marie Madigan","doi":"10.3847/2041-8213/addc5d","DOIUrl":"https://doi.org/10.3847/2041-8213/addc5d","url":null,"abstract":"The Galactic center hosts a rotating disk of young stars between 0.05 and 0.5 pc of Sgr A*. The “S stars” at a distance <0.04 pc, however, are on eccentric orbits with nearly isotropically distributed inclinations. The dynamical origin of the S-star cluster has remained a theoretical challenge. Using a series of N-body simulations, we show that a recent massive black hole merger with Sgr A* can self-consistently produce many of the orbital properties of the Galactic nuclear star cluster within 0.5 pc. A black hole merger results in a gravitational-wave recoil kick, which causes the surrounding cluster to form an apse-aligned eccentric disk. We show that stars near the inner edge of an eccentric disk migrate inward and are driven to high eccentricities and inclinations due to secular torques similar to the eccentric Kozai–Lidov mechanism. In our fiducial model, starting with a thin eccentric disk with e = 0.3, the initially unoccupied region within 0.04 pc is populated with high-eccentricity, high-inclination S stars within a few Myr. This formation channel requires a black hole of mass to have merged with Sgr A* within the last 10 Myr.","PeriodicalId":501814,"journal":{"name":"The Astrophysical Journal Letters","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144547621","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

Was Earth’s Water Acquired Locally during the Earliest Phases of the Solar System Formation? 地球上的水是在太阳系形成的最初阶段局部获得的吗？

The Astrophysical Journal Letters Pub Date : 2025-07-01 DOI: 10.3847/2041-8213/ade5aa

Lise Boitard-Crépeau, Cecilia Ceccarelli, Pierre Beck, Lionel Vacher and Piero Ugliengo

引用次数: 0

A Relativistic Jet in the Radio-quiet Active Galactic Nucleus Mrk 110 无线电安静的活动星系核mrk110中的相对论喷流

The Astrophysical Journal Letters Pub Date : 2025-07-01 DOI: 10.3847/2041-8213/ade14a

Ailing Wang, Tao An, Kenneth I. Kellermann, Hua Feng, Emmanuel K. Bempong-Manful, Roland Timmerman and Shaoguang Guo

{"title":"A Relativistic Jet in the Radio-quiet Active Galactic Nucleus Mrk 110","authors":"Ailing Wang, Tao An, Kenneth I. Kellermann, Hua Feng, Emmanuel K. Bempong-Manful, Roland Timmerman and Shaoguang Guo","doi":"10.3847/2041-8213/ade14a","DOIUrl":"https://doi.org/10.3847/2041-8213/ade14a","url":null,"abstract":"We report the discovery of a relativistic jet in Mrk 110, a narrow-line Seyfert 1 galaxy historically classified as a radio-quiet active galactic nucleus (AGN). Very long baseline interferometry observations reveal intermittent jet activity during 2015–2016 and 2022–2024, with proper-motion measurements yielding superluminal velocities of ∼3.6 ± 0.6c and ∼2.1 ± 0.2c, respectively. The recent jet component decelerates to ∼1.5 ± 0.2c at a projected distance of 1.1 pc from the core, coinciding with the transition zone between broad-line and narrow-line regions. This deceleration accompanies dramatic spectral evolution from steep (spectral index α ≈ −0.63 ± 0.04) to inverted (α ≈ +0.69 ± 0.10) as the 7.6 GHz flux density more than doubled. These episodic jet ejections and their evolutionary pattern match theoretical predictions from magnetically arrested disk (MAD) models for temporary jet formation in systems with Mrk 110’s physical parameters on timescales of months to years. The observed jet deceleration distance matches expectations for relativistic outflows interacting with the circumnuclear environment. These findings demonstrate that the traditional radio-loud/quiet AGN dichotomy may reflect time-averaged states rather than intrinsic capabilities, suggesting that jets may form across the AGN population but become observable only during specific accretion phases when MAD conditions are temporarily established. Mrk 110 serves as a critical “missing link” between radio-loud and radio-quiet AGN, providing insight into jet formation mechanisms, environmental interactions, and physical processes that unify various AGN classifications.","PeriodicalId":501814,"journal":{"name":"The Astrophysical Journal Letters","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144547616","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