A fast-rising tidal disruption event from a candidate intermediate-mass black hole
A fast-rising tidal disruption event from a candidate intermediate-mass black hole
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DOI：
10.1038/s41550-022-01811-y
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发表时间：
2022-08
期刊：
影响因子：
14.1
通讯作者：
C. Angus;V. Baldassare;B. Mockler;R. Foley;E. Ramirez-Ruiz;S. Raimundo;K. D. French;K. Auchettl;H. Pfister;C. Gall;J. Hjorth;M. Drout;K. Alexander;G. Dimitriadis;T. Hung;D. Jones;A. Rest;M. Siebert;Kirsty Taggart;G. Terreran;S. Tinyanont;C. M. Carroll;L. DeMarchi;N. Earl;Alexander T Gagliano;L. Izzo;V. Villar;Y. Zenati;N. Arendse;C. Cold;T. D. Boer;K. Chambers;D. Coulter;N. Khetan;C. C. Lin-C.;E. Magnier;C. Rojas-Bravo;R. Wainscoat;R. Wojtak
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文献类型：
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作者：
C. Angus;V. Baldassare;B. Mockler;R. Foley;E. Ramirez-Ruiz;S. Raimundo;K. D. French;K. Auchettl;H. Pfister;C. Gall;J. Hjorth;M. Drout;K. Alexander;G. Dimitriadis;T. Hung;D. Jones;A. Rest;M. Siebert;Kirsty Taggart;G. Terreran;S. Tinyanont;C. M. Carroll;L. DeMarchi;N. Earl;Alexander T Gagliano;L. Izzo;V. Villar;Y. Zenati;N. Arendse;C. Cold;T. D. Boer;K. Chambers;D. Coulter;N. Khetan;C. C. Lin-C.;E. Magnier;C. Rojas-Bravo;R. Wainscoat;R. Wojtak
大质量星系中心的大质量黑洞（BH）无处不在。另一方面，矮星系中黑洞的数量还不清楚。矮星系被认为拥有相对较小质量的黑洞，包括中等质量的黑洞，质量为102<MBH<106太阳质量（M）。这些系统的识别历来依赖于检测从靠近黑洞的吸积气体盘发出的光。如果没有这种光，它们很难被发现。潮汐破裂事件，即当星星偏离黑洞并被撕碎时产生的发光耀斑，是探测大质量黑洞的直接方法。这些耀斑的上升时间理论上与BH质量相关。在这里，我们介绍了AT 2020 neh，一个快速上升的潮汐破坏事件候选者，由矮星系主办。AT 2020 neh可以用104.7- 105.9 M的黑洞对主序星星星的潮汐破坏来描述。我们发现像AT 2020 neh这样快速上升的核瞬变的可观测率很低，只有102 × 10− 8次Mpc− 3 yr −1。在矮星系中发现非吸积黑洞对于确定这些星系中黑洞的普遍程度以及限制黑洞形成的模型非常重要。AT 2020 neh类事件可能提供一种测量中等质量黑洞质量的独立于星系的方法。
Massive black holes (BHs) at the centres of massive galaxies are ubiquitous. The population of BHs within dwarf galaxies, on the other hand, is not yet known. Dwarf galaxies are thought to harbour BHs with proportionally small masses, including intermediate-mass BHs, with masses 102<MBH< 106solar masses (M⊙). Identification of these systems has historically relied on the detection of light emitted from accreting gaseous disks close to the BHs. Without this light, they are difficult to detect. Tidal disruption events, the luminous flares produced when a star strays close to a BH and is shredded, are a direct way to probe massive BHs. The rise times of these flares theoretically correlate with the BH mass. Here we present AT 2020neh, a fast-rising tidal disruption event candidate, hosted by a dwarf galaxy. AT 2020neh can be described by the tidal disruption of a main sequence star by a 104.7–105.9M⊙BH. We find the observable rate of fast-rising nuclear transients like AT 2020neh to be low, at ≲2 × 10−8events Mpc−3yr−1. Finding non-accreting BHs in dwarf galaxies is important to determine how prevalent BHs are within these galaxies, and to constrain models of BH formation. AT 2020neh-like events may provide a galaxy-independent method of measuring the masses of intermediate-mass BHs.