Accurate spectroscopic redshift estimation using non-negative matrix factorization: application to MUSE spectra

本文提出了一种基于非负矩阵分解的数据驱动方法,通过构建星系光谱的静止帧表示并最小化重构误差来准确估算红移,在 MUSE 光谱数据上取得了 93.7% 的成功率,并有效实现了真实与虚假源分离及混叠源检测。

Masten Bourahma, Nicolas F. Bouché, Roland Bacon, Johan Richard, Tanya Urrutia, Afonso Vale, Martin Wendt, T. T. ThaiWed, 11 Ma🔭 astro-ph

Detection and Astrometry of the Ba-Bb Subsystem in α\alpha Piscium: First Dual-Field Interferometry at the CHARA Array

该论文报告了 CHARA 阵列首次成功实施双场干涉观测,直接解析并确认了亮星α\alpha Piscium 中 B 分量内存在一个由两颗近等质量 F 型恒星组成的短周期(25 天)双星子系统(Ba-Bb),并通过结合干涉测量、VLTI 天体测量及光谱数据精确测定了其动力学质量,同时验证了该阵列在角秒级双星亚毫角秒级天体测量方面的新能力。

Narsireddy Anugu (The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), Robert Klement (European Organisation for Astronomical Research in the Southern Hemisphere, Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Boulevard de l'Observatoire, CS 34229, 06304 Nice Cedex 4, France, The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), John D. Monnier (Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA), Douglas R. Gies (Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA), Gail H. Schaefer (The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), Stefan Kraus (Astrophysics Group, Department of Physics and Astronomy, University of Exeter, Stocker Road, Exeter, EX4 4QL, UK), Sebastián Carrazco-Gaxiola (Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA), Akshat S. Chaturvedi (Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA), Mayra Gutierrez (Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA), Becky Flores (Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA), Jeremy Jones (Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA), Colin Kane (Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA), Rainer Köhler (The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), Karolina Kubiak (The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), Olli W. Majoinen (The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), Nicholas J. Scott (The CHARA Array of Georgia State University, Mount Wilson Observatory, Mount Wilson, CA 91023, USA), Kayvon Sharifi (Center for High Angular Resolution Astronomy and Department of Physics and Astronomy, Georgia State University, P.O. Box 5060, Atlanta, GA 30302-5060, USA)Wed, 11 Ma🔭 astro-ph

Optical calibration systems of the Pacific Ocean Neutrino Experiment

本文介绍了太平洋中微子实验(P-ONE)光学校准系统的设计与性能表征,包括基于氮化镓技术的新型光脉冲驱动电路以及方向性和各向同性自监测校准仪器,并详细报告了其在 365-520 nm 波长范围内高达$10^{11}光子发射强度、1.4ns脉冲宽度以及在全立体角范围内实现光子发射强度、1.4 ns 脉冲宽度以及在全立体角范围内实现1.00 \pm 0.01$各向同性等级的实验与模拟验证结果。

M. Agostini, A. Alexander Wight, M. Altomare, K. Bas, N. Baily, P. S. Barbeau, A. J. Baron, S. Bash, C. Bellenghi, M. Boehmer, M. Brandenburg, P. Bunton, N. Cedarblade-Jones, B. Crudele, M. Danninger, T. DeYoung, A. Gärtner, J. Garriz, D. Ghuman, L. Ginzkey, T. Glukler, V. Gousy-Leblanc, D. Grant, A. Grimes, C. Haack, R. Hall, R. Halliday, D. Hembroff, F. Henningsen, M. Herle, O. Janik, H. Johnson, W. Kang, S. Karanth, T. Kerscher, S. Kerschtien, K. Kopanski, C. Kopper, P. Krause, C. B. Krauss, N. Kurahashi, C. Lagunas Gualda, A. Lam, T. Lavallee, K. Leismüller, R. Li, S. Loipolder, C. Magee, S. Magel, P. Malecki, T. Martin, A. Maunder, C. Miller, N. Molberg, R. Moore, B. Nührenbörger, B. Nichol, W. Noga, R. Ørsøe, L. Papp, V. Parrish, P. Pfahler, J. Pflanz, B. Pirenne, E. Price, A. Rahlin, M. Rangen, E. Resconi, S. Robertson, M. F. Rodriguez-Pilco, D. Salazar-Gallegos, A. Scholz, L. Schumacher, S. Sharma, B. R. Smithers, C. Spannfellner, J. Stacho, I. Taboada, K. Tchiorniy, J. P. Twagirayezu, M. Un Nisa, B. Veenstra, M. Velazquez, L. von der Werth, C. Weaver, N. Whitehorn, L. Winter, R. Wronski, J. P. Yañez, S. Yun-Cárcamo, A. ZaalishviliWed, 11 Ma🔭 astro-ph

CubeSats Reach the Millisecond X-Ray Domain: Crab Pulsar Timing with SpIRIT/HERMES

搭载于 SpIRIT 立方星上的 HERMES 仪器利用其独特的宽能段和高时间分辨率,成功在毫秒尺度上探测到了蟹状脉冲星的双峰脉冲轮廓,证明了小型卫星在毫秒级高能天体物理观测领域的卓越潜力。

Wladimiro Leone, R. Mearns, T. Di Salvo, L. Burderi, M. Thomas, M. Trenti, F. Fiore, E. J. Marchesini, R. Campana, G. Baroni, M. Dafcikova, A. Anitra, Y. Evangelista, A. Sanna, S. Puccetti, R. Iaria, S. Barraclough, M. Ortiz del Castillo, R. Bertacin, P. Bellutti, G. Bertuccio, A. Chapman, G. Cabras, F. Ceraudo, T. Chen, M. Citossi, R. Crupi, G. Della Casa, E. Demenev, G. Dilillo, M. Feroci, F. Ficorella, M. Fiorini, N. Gao, A. Guzman, P. Hedderman, A. Hudrap, C. Labanti, G. La Rosa, P. Malcovati, J. McRobbie, F. Mele, G. Molera Calves, J. Morgan, G. Morgante, B. Negri, D. Novel, P. Nogara, A. Nuti, E. O'Brien, G. Pepponi, M. Perri, A. Picciotto, R. Piazzolla, S. Pirrotta, S. Pliego Caballero, A. Rachevski, I. Rashevskaya, A. Riggio, F. Russo, A. Santangelo, G. Sottile, C. Tenzer, Y. Tao, S. Trevisan, A. Vacchi, G. Zampa, N. Zampa, S. Xiong, S. Yi, A. Woods, S. Zhang, N. ZorziWed, 11 Ma🔭 astro-ph

CHRONOS: Cryogenic sub-Hz cROss torsion bar detector with quantum NOn-demolition Speed meter

本文提出了一种名为 CHRONOS 的下一代地基引力波探测器,该探测器利用环形腔 Sagnac 干涉仪与扭摆测试质量结合量子非破坏性速度表技术,旨在填补 0.1-10 Hz 频段空白,实现对中间质量黑洞并合、随机引力波背景及地震重力梯度信号的高灵敏度探测。

Yuki Inoue, Hsiang-Chieh Hsu, Hsiang-Yu Huang, M. Afif Ismail, Vivek Kumar, Miftahul Ma'arif, Avani Patel, Daiki Tanabe, Henry Tsz-King Wong, Ta-Chun YuTue, 10 Ma🔭 astro-ph

Astrometric view of companions in the inner dust cavities of protoplanetary disks

该研究利用盖亚(Gaia)天体测量数据对 98 个过渡盘进行了伴星搜寻,发现其中 32% 存在伴星信号,但大多数已探测到的伴星质量过大或轨道位置不符,无法解释盘内尘埃空腔的形成,暗示若空腔由伴星塑造,则需存在尚未被探测到的、位于更远轨道的行星质量天体。

Miguel Vioque, Richard A. Booth, Enrico Ragusa, Álvaro Ribas, Nicolás T. Kurtovic, Giovanni P. Rosotti, Zephyr Penoyre, Stefano Facchini, Antonio Garufi, Carlo F. Manara, Nuria Huélamo, Andrew Winter, Sebastián Pérez, Myriam Benisty, Ignacio Mendigutía, Nicolás Cuello, Anna B. T. Penzlin, Alfred Castro-Ginard, Richard TeagueTue, 10 Ma🔭 astro-ph

Polarimetric and spectropolarimetric observations with FoReRo2: Instrument overview and standard star monitoring

本文介绍了安装在保加利亚罗日恩 2 米望远镜上的多模式仪器 FoReRo2 的极化与光谱偏振观测功能,通过标准星监测(包括对 HD 204827 和 HD 183143 的评估及塞尔科夫定律参数的首次统计分析)以及 RS Oph 新星、C/2019 Y4 彗星和 Z And 共生星的观测实例,全面展示了该仪器的性能与科学应用潜力。

Yanko Nikolov, Galin Borisov, Stefano Bagnulo, Plamen Nikolov, Rumen Bogdanovski, Tanyu BonevTue, 10 Ma🔭 astro-ph

A differentiable and optimizable 3D model for interpretation of observed spectral data cubes

该论文提出了一种可微分且可优化的三维几何模型,用于从观测光谱数据立方体中反演原恒星核的物理化学性质,并应用于 L1544 核心分析,发现其密度和速度的不对称结构是解释 p-NH2D 与 N2D+ 谱线速度差异的关键。

T. Grassi, J. E. Pineda, S. Spezzano, D. Arzoumanian, F. Lique, Y. Misugi, E. Redaelli, S. S. Jensen, P. CaselliTue, 10 Ma🔭 astro-ph

An Attempt to Search for Unintended Electromagnetic Radiation from Starlink Satellites with the 21 Centimeter Array: Methodology and RFI Characterization

本文利用 21 厘米阵列(21CMA)构建了针对星链卫星非预期电磁辐射的观测与检测流程,通过轨道预测成功验证了 ORBCOMM 卫星信号的识别能力,并证实观测到的宽带脉冲干扰源于阵列附近的电力线电弧而非卫星辐射。

Xupiao Yang, Qijun Zhi, Yanbin Yang, Quan Guo, Juhua Gu, Jianfeng Wang, Yan Huang, Yun Yu, Feiyu ZhaoTue, 10 Ma🔭 astro-ph