The Salamander: A case study of the magnetic field and peculiar morphology of G309.8-2.6 through radio polarimetry

该研究利用 ASKAP 的 EMU 和 POSSUM 巡天数据,结合多波段观测,揭示了超新星遗迹 G309.8-2.6(“火蜥蜴”)中延伸的遗迹脉冲星风云及其独特的 S 形偏振形态和高度有序的磁场结构,从而深化了对该天体物理性质及其与星际介质相互作用的理解。

Wenhui Jing (Yunnan University), Jennifer L. West (Dominion Radio Astrophysical Observatory, National Research Council Canada), Xiaohui Sun (Yunnan University), Roland Kothes (Dominion Radio Astrophysical Observatory, National Research Council Canada), Isabel Sander (University of Manitoba), Samar Safi-Harb (University of Manitoba), Denis Leahy (University of Calgary), B. M. Gaensler (University of California Santa Cruz, University of Toronto), Xianghua Li (Yunnan University), Brianna Ball (University of Alberta), Craig Anderson (Australian National University), W. Becker (Max-Planck-Institut für extraterrestrische Physik, Max-Planck-Institut für Radioastronomie), Miroslav D. Filipovic (Western Sydney University), Andrew M. Hopkins (Macquarie University), Yik Ki Ma (Max-Planck-Institut für Radioastronomie), Naomi McClure-Griffiths (Australian National University), Syed Faisal ur Rahman (Lahore University of Management Sciences, NED University of Engineering,Technology), Cameron L. van Eck (The Australian National University), Jacco Th. van Loon (Keele University), Jayde Willingham (Macquarie University)Wed, 11 Ma🔭 astro-ph

Stellar age determination using deep neural networks: Isochrone ages for 1.3 million stars, based on BaSTI, MIST, PARSEC, Dartmouth and SYCLIST evolutionary grids

该研究提出了一种基于恒星演化网格训练模型驱动深度神经网络的恒星年龄测定新方法,成功为 130 万颗恒星估算了年龄并发布了 NEST 工具包,在保持与贝叶斯等龄线拟合方法一致性的同时实现了高达 60,000 倍的计算加速,从而为大规模银河系考古研究提供了高效解决方案。

T. Boin, L. Casamiquela, M. Haywood, P. Di Matteo, Y. Lebreton, M. Uddin, D. R. ReeseWed, 11 Ma🔭 astro-ph

ODIN: Confirmation and 3D Reconstruction of Six Massive Protoclusters at Cosmic Noon

该研究利用 ODIN 巡天的宽视场 Lyα\alpha成像与 DESI 等光谱数据,确认了六个位于宇宙正午时期(z2.4z\approx 2.4和$3.1$)的大质量原星系团,重建了其三维结构,并揭示了高密度环境对星系发射线性质及早期淬灭的显著影响。

Ashley Ortiz, Vandana Ramakrishnan, Kyoung-Soo Lee, Arjun Dey, Yucheng Guo, Ethan Pinarski, Anand Raichoor, Francisco Valdes, J. Aguilar, Steven Ahlen, Maria Celeste Artale, Davide Bianchi, August Bliese, David Brooks, Rebecca Canning, Maria Cerdosino, Todd Claybaugh, Andrei Cuceu, Axel de la Macorra, Peter Doel, Jaime Forero, Eric Gawiser, Enrique Gaztanaga, Satya Gontcho, Caryl Gronwall, Lucia Guaita, Gaston Gutierrez, Hiram K. Herrera-Alcantar, Ho Seong Hwang, Woong-Seob Jeong, Dick Joyce, Robert Kehoe, Theodore Kisner, Anthony Kremin, Ankit Kumar, Ofer Lahav, Martin Landriau, Jaehyun Lee, Seong-Kook Lee, Laurent Le Guillou, Marc Manera, Aaron Meisner, Ramon Miquel, Byeongha Moon, John Moustakas, Adam Myers, Seshadri Nadathur, Nathalie Palanque-Delabrouille, Changbom Park, Will Percival, Ignasi Perez-Rafols, Francisco Prada, Eshwar Puvvada, Graziano Rossi, Eusebio Sanchez, David Schlegel, Michael Schubnell, Joseph Harry Silber, Hyunmi Song, David Sprayberry, Gregory Tarle, Paulina Troncoso, Ana Sofia Uzsoy, Benjamin Weaver, Yujin Yang, Rongpu Zhou, Hu ZouWed, 11 Ma🔭 astro-ph

POLAR-II: modeling star formation history of galaxies on the 21-cm signal from Epoch of Reionization

该研究利用 Jiutian-300 模拟与 L-Galaxies 2020 模型,揭示了星系恒星形成历史(特别是恒星年龄加权年龄)的变化会显著改变再电离时期的电离与加热过程,进而影响 21 厘米信号的全局特征和功率谱。

Qing-Bo Ma, Raghunath Ghara, Benedetta Ciardi, Anshuman Acharya, Bin Yue, Ilian T. Iliev, Léon V. E. Koopmans, Garrelt Mellema, Saleem ZaroubiWed, 11 Ma🔭 astro-ph

Going Wide and Deep with Roman: The z~6-9 UV luminosity function in a Roman Deep Field

该论文通过基于半解析模型的模拟研究,优化了南希·格蕾丝·罗曼太空望远镜的超深场巡天策略,建议覆盖至少两个视场并使用全部六个滤光片,以显著降低红移z69z\sim6-9星系紫外光度函数的不确定性。

Micaela B. Bagley, Steven L. Finkelstein, James Rhoads, Sangeeta Malhotra, L. Y. Aaron Yung, Rachel S. Somerville, Casey PapovichWed, 11 Ma🔭 astro-ph

FEAST: a NIRSpec/MOS survey of emerging young star clusters in NGC 628

本文介绍了利用 JWST/NIRSpec 多目标光谱对邻近螺旋星系 NGC 628 中正在从母分子云中涌现的年轻星团(eYSCs)进行的 FEAST 巡天初步研究,首次证实了 JWST 能够解析这些星团及其周围介质的光谱特征,揭示了以光致电离为主导、超新星激波贡献极小的反馈机制,并展示了其在本地群之外研究恒星形成最早阶段的能力。

Helena Faustino Vieira, Angela Adamo, Neville Shane, Linda J. Smith, Arjan Bik, Thomas S. -Y. Lai, Alex Pedrini, Leslie K. Hunt, Sean T. Linden, Giacomo Bortolini, Anne S. Buckner, Daniela Calzetti, Matteo Correnti, Ana Duarte-Cabral, Kathryn Grasha, Kelsey E. Johnson, Drew Lapeer, Matteo Messa, Göran Östlin, Linn Roos, Elena SabbiWed, 11 Ma🔭 astro-ph

Mass regulates the emerging timescale of young star clusters

该研究利用哈勃和韦伯望远镜对四个邻近星系中数千个年轻星团的观测发现,星团质量越大,其从母体气体中显现并驱散周围物质的时间越短,这一关键发现不仅为恒星反馈模拟提供了重要约束,还揭示了大质量星团在驱动电离辐射逃逸及限制其内部行星形成时间窗口中的核心作用。

Alex Pedrini, Angela Adamo, Daniela Calzetti, Arjan Bik, Thomas J. Haworth, Bruce G. Elmegreen, Mark R. Krumholz, Sean T. Linden, Benjamin Gregg, Helena Faustino Vieira, Varun Bajaj, Jenna E. Ryon, Ahmad A. Ali, Eric P. Andersson, Giacomo Bortolini, Michele Cignoni, Ana Duarte-Cabral, Kathryn Grasha, Natalia Lahén, Thomas S. -Y. Lai, Drew Lapeer, Matteo Messa, Göran Östlin, Elena Sabbi, Linda J. Smith, Monica TosiWed, 11 Ma🔭 astro-ph

The role of mass loss in constraining quenching time in dwarf galaxies from AGB and RGB star counts

该研究利用包含尘埃形成机制的恒星演化模型,通过矮星系中渐近巨星支与红巨星支恒星数量比(NAGB/NRGB)对质量损失过程的敏感性分析,建立了该比率与星系 90% 恒星形成完成时间(T90)之间的定量关系,从而将 T90 的估算不确定性控制在约 10 亿年以内。

Paolo Ventura, Richard D'Souza, Flavia Dell'Agli, Eric Bell, Claudio Gavetti, Chiara Fiumi, Marco TailoWed, 11 Ma🔭 astro-ph

Forward-modelling Milky Way Cepheids: selection effects and physical priors in the Gaia-HST calibration

该研究通过构建一个同时考虑银河系几何结构、HST 巡天选择效应及物理先验的完全前向建模贝叶斯框架,利用 Gaia EDR3 视差数据对银河系造父变星进行了重新校准,证实了忽略选择效应会导致周光关系零点出现显著偏差,从而强化了本地距离阶梯对哈勃常数 H0H_0 的测定并巩固了哈勃张力。

Richard Stiskalek, Adam Riess, Harry Desmond, Guilhem Lavaux, Dan ScolnicWed, 11 Ma🔭 astro-ph

ODIN: Spectroscopic Validation of Lyα\alpha-Emitting Galaxy Samples with DESI

本文利用 DESI 光谱数据验证了 ODIN 巡天在红移 z=2.4、3.1 和 4.5 处选定的莱曼α发射星系样本,确认其高置信度红移的确认率分别高达 93%、96% 和 92%,并表明窄带超量测光要求能有效剔除主要的低红移污染。

Ethan Pinarski, Govind Ramgopal, Nicole Firestone, Kyoung-Soo Lee, Eric Gawiser, Arjun Dey, A. Raichoor, Francisco Valdes, Robin Ciardullo, Jessica N. Aguilar, S. Ahlen, D. Bianchi, D. Brooks, F. J. Castander, M. Candela Cerdosino, T. Claybaugh, A. Cuceu, K. S. Dawson, A. de la Macorra, P. Doel, S. Ferraro, A. Font-Ribera, J. E. Forero-Romero, E. Gaztañaga, S. Gontcho A Gontcho, Lucia Guaita, G. Gutierrez, Stephen Gwyn, H. K. Herrera-Alcantar, Ho Seong Hwang, R. Joyce, S. Juneau, R. Kehoe, D. Kirkby, T. Kisner, A. Kremin, Ankit Kumar, C. Lamman, M. Landriau, L. Le Guillou, M. E. Levi, Yufeng Luo, M. Manera, P. Martini, A. Meisner, R. Miquel, J. Moustakas, A. D. Myers, S. Nadathur, Gautam R. Nagaraj, N. Palanque-Delabrouille, Changbom Park, W. J. Percival, I. Pérez-Ràfols, F. Prada, G. Rossi, E. Sanchez, Marcin Sawicki, D. Schlegel, M. Schubnell, J. Silber, Hyunmi Song, D. Sprayberry, G. Tarlé, Paulina Troncoso Iribarren, B. A. Weaver, Yujin Yang, Ann ZabludoffWed, 11 Ma🔭 astro-ph

Resolved molecular gas and star-formation in massive unquenched spirals : I. UGC 8179

该研究利用 NOEMA 对超巨型螺旋星系 UGC 8179 进行了高分辨率分子气体与恒星形成观测,证实尽管其质量极大且中心存在由星 bulge 驱动的恒星形成抑制,但其局部仍遵循典型的恒星形成物理规律。

Romane Cologni, Simon Flesch, Philippe Salomé, Damien Le Borgne, Médéric Boquien, Jonathan Freundlich, Pierre Guillard, Ute Lisenfeld, Francoise Combes, Laure BouscasseWed, 11 Ma🔭 astro-ph

Far-infrared Polarization Properties of Nearby Star-forming Regions: A New Compendium of SOFIA/HAWC+ Observations

该研究利用 SOFIA/HAWC+ 的 52 组档案数据,对 26 个邻近恒星形成区的远红外偏振特性进行了综合分析,揭示了偏振谱随分辨率和柱密度的变化规律,并指出小尺度结构中的暖尘埃发射可能追踪了与大尺度银河系平面磁场解耦的不同磁场几何结构。

Kaitlyn Karpovich, Susan E. Clark, Enrique Lopez-RodriguezWed, 11 Ma🔭 astro-ph

Black Hole Properties of Type-1 Active Galactic Nuclei in the North Ecliptic Pole Wide Field: I. Mid-infrared Sources with Optical Counterparts

该研究利用北黄极宽视场(NEP-Wide)中同时具备光学与中红外数据的 861 个 I 型活动星系核,通过光谱能量分布和谱线拟合,在有效消除尘埃消光影响的情况下,成功推导了其中约 450 个天体的黑洞质量、光度及爱丁顿比等关键物理参数,并发现该区域约 34% 的 I 型活动星系核存在尘埃遮蔽现象。

Dohyeong Kim, Myungshin Im, Hyunjin Shim, Minjin Kim, Gu Lim, Junyeong Park, Hayeong Jeong, Yongjung Kim, Yongmin Yoon, Seong Jin Kim, Yoshiki Toba, Tomotsugu Goto, Nagisa Oi, Hyunmi SongWed, 11 Ma🔭 astro-ph

Explainable classification of astronomical uncertain time series

该论文提出了一种将数据不确定性作为额外输入的可解释子序列模型,在保持与最先进方法相当分类性能的同时,解决了现有可解释时间序列方法在处理天文不确定时间序列时性能不足的问题,并能为天体物理理论建模提供新的见解。

Michael Franklin Mbouopda (LIMOS, UCA), Emille E. O. Ishida (LIMOS, UCA), Engelbert Mephu Nguifo (LIMOS, UCA), Emmanuel Gangler (LPC, UCA)Tue, 10 Ma🔭 astro-ph

Dynamical reconstruction of SPARC galactic halos within self-interacting fuzzy dark matter

该论文提出具有非零四次自相互作用的模糊暗物质(SFDM)模型,通过结合超高斯核心与 NFW 晕轮廓,成功利用单一参数点拟合了 SPARC 数据库中 17 个矮星系的旋转曲线,并展示了基于该模型对宿主暗物质晕进行动力学重构及数值模拟的可行性。

Milos Indjin, I-Kang Liu, Nick P. Proukakis, Gerasimos Rigopoulos, Aditya VermaTue, 10 Ma🔭 astro-ph