通过天体测量微透镜效应探测到的一颗孤立恒星级黑洞
太阳与恒星天体物理
2022-07-25 v4 星系天体物理
高能天体物理现象
摘要
我们报告了首次明确探测并测量了一颗孤立恒星级黑洞 的质量。我们使用哈勃空间望远镜 对朝向银河系凸起方向的长持续时间（ 天）、高放大率微透镜事件 MOA-2011-BLG-191/OGLE-2011-BLG-0462（以下简称 MOA-11-191/OGLE-11-462）的源星进行了精确的天体测量。在六年时间跨度内的八个历元进行的 HST 成像揭示了背景星视位置的清晰相对论天体测量偏转。MOA-11-191/OGLE-11-462 的地基测光显示了地球运动对微透镜光变曲线影响的视差特征。结合 HST 天体测量、地基光变曲线和推导出的视差，我们获得了透镜质量为 ，距离为 kpc。我们表明该透镜不发出可探测的光，加上其质量高于白矮星或中子星的可能质量，证实了其黑洞性质。我们的分析还提供了该黑洞的绝对自行运动。该自行运动与类似距离处银河系盘恒星的平均运动存在偏移，偏移量对应于约 45 km/s 的横向空间速度，表明该黑洞在其超新星爆发时受到了一次“natal kick”。先前对恒星级黑洞的质量测定来自于银河系 X 射线双星的视向速度测量，以及外部星系中双星系统合并黑洞发射的引力辐射。我们的质量测量是使用任何技术对孤立恒星级黑洞进行的首次测量。
引用
@article{arxiv.2201.13296,
title = {An Isolated Stellar-Mass Black Hole Detected Through Astrometric Microlensing},
author = {Kailash C. Sahu and Jay Anderson and Stefano Casertano and Howard E. Bond and Andrzej Udalski and Martin Dominik and Annalisa Calamida and Andrea Bellini and Thomas M. Brown and Marina Rejkuba and Varun Bajaj and Noe Kains and Henry C. Ferguson and Chris L. Fryer and Philip Yock and Przemek Mroz and Szymon Kozlowski and Pawel Pietrukowicz and Radek Poleski and Jan Skowron and Igor Soszynski and Michael K. Szymanski and Krzysztof Ulaczyk and Lukasz Wyrzykowski and Richard Barry and David P. Bennett and Ian A. Bond and Yuki Hirao and Stela Ishitani Silva and Iona Kondo and Naoki Koshimoto and Clement Ranc and Nicholas J. Rattenbury and Takahiro Sumi and Daisuke Suzuki and Paul J. Tristram and Aikaterini Vandorou and Jean-Philippe Beaulieu and Jean-Baptiste Marquette and Andrew Cole and Pascal Fouque and Kym Hill and Stefan Dieters and Christian Coutures and Dijana Dominis-Prester and Clara Bennett and Etienne Bachelet and John Menzies and Michael Alb-row and Karen Pollard and Andrew Gould and Jennifer Yee and William Allen and Leonardo Andrade de Almeida and Grant Christie and John Drummond and Avishay Gal-Yam and Evgeny Gorbikov and Francisco Jablonski and Chung-Uk Lee and Dan Maoz and Ilan Manulis and Jennie McCormick and Tim Natusch and Richard W. Pogge and Yossi Shvartzvald and Uffe G. Jorgensen and Khalid A. Alsubai and Michael I. Andersen and Valerio Bozza and Sebastiano Calchi Novati and Martin Burgdorf and Tobias C. Hinse and Markus Hundertmark and Tim-Oliver Husser and Eamonn Kerins and Penelope Longa-Pena and Luigi Mancini and Matthew Penny and Sohrab Rahvar and Davide Ricci and Sedighe Sajadian and Jesper Skottfelt and Colin Snodgrass and John Southworth and Jeremy Tregloan-Reed and Joachim Wambsganss and Olivier Wertz and Yiannis Tsapras and Rachel A. Street and Daniel M. Bramich and Keith Horne and Iain A. Steele},
journal= {arXiv preprint arXiv:2201.13296},
year = {2022}
}
备注
37 pages, Published in ApJ