A fast-rising tidal disruption event from a candidate intermediate-mass black hole

被引：37

作者：

Angus, C. R. ^{[1
]}

Baldassare, V. F. ^{[2
]}

Mockler, B. ^{[3
]}

Foley, R. J. ^{[3
]}

Ramirez-Ruiz, E. ^{[1
,3
]}

Raimundo, S., I ^{[1
,4
,5
]}

French, K. D. ^{[6
,7
]}

Auchettl, K. ^{[3
,8
,9
]}

Pfister, H. ^{[1
,10
]}

Gall, C. ^{[1
]}

Hjorth, J. ^{[1
]}

Drout, M. R. ^{[11
,12
]}

Alexander, K. D. ^{[13
,14
]}

Dimitriadis, G. ^{[3
,15
]}

Hung, T. ^{[3
]}

Jones, D. O. ^{[3
]}

Rest, A. ^{[16
,17
]}

Siebert, M. R. ^{[3
]}

Taggart, K. ^{[3
]}

Terreran, G. ^{[18
,19
]}

Tinyanont, S. ^{[3
]}

Carroll, C. M. ^{[2
]}

DeMarchi, L. ^{[13
,14
]}

Earl, N. ^{[6
]}

Gagliano, A. ^{[6
,7
]}

Izzo, L. ^{[1
]}

Villar, V. A. ^{[20
,21
,22
]}

Zenati, Y. ^{[16
]}

Arendse, N. ^{[1
]}

Cold, C. ^{[1
]}

de Boer, T. J. L. ^{[23
]}

Chambers, K. C. ^{[23
]}

Coulter, D. A. ^{[3
]}

Khetan, N. ^{[1
]}

Lin, C. C. ^{[23
]}

Magnier, E. A. ^{[23
]}

Rojas-Bravo, C. ^{[3
]}

Wainscoat, R. J. ^{[23
]}

Wojtak, R. ^{[1
]}

机构：

[1] Univ Copenhagen, Niels Bohr Inst, Dark, Copenhagen, Denmark

[2] Washington State Univ, Dept Phys & Astron, Pullman, WA 99164 USA

[3] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA

[4] Univ Southampton, Southampton, Hants, England

[5] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA USA

[6] Univ Illinois, Dept Astron, Champaign, IL USA

[7] Natl Ctr Supercomp Applicat, Ctr Astrophys Surveys, Urbana, IL USA

[8] Univ Melbourne, Sch Phys, OzGrav, Parkville, Vic, Australia

[9] ARC Ctr Excellence All Sky Astrophys 3 Dimens AST, Melbourne, Vic, Australia

[10] Univ Hong Kong, Dept Phys, Hong Kong, Peoples R China

[11] Univ Toronto, David A Dunlap Dept Astron & Astrophys, Toronto, ON, Canada

[12] Observ Carnegie Inst Sci, Pasadena, CA USA

[13] Northwestern Univ, Ctr Interdisciplinary Explorat & Res Astrophys, Evanston, IL USA

[14] Northwestern Univ, Dept Phys & Astron, Evanston, IL USA

[15] Univ Dublin, Trinity Coll Dublin, Sch Phys, Dublin, Ireland

[16] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[17] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA

[18] Las Cumbres Observ, Goleta, CA USA

[19] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[20] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA

[21] Penn State Univ, Inst Computat & Data Sci, University Pk, PA 16802 USA

[22] Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA

[23] Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA

来源：

NATURE ASTRONOMY | 2022年 / 6卷 / 12期

基金：

澳大利亚研究理事会; 美国国家科学基金会; 加拿大自然科学与工程研究理事会; 新加坡国家研究基金会;

关键词：

RAPIDLY EVOLVING TRANSIENTS; HOST GALAXIES; LINE SPECTRA; STAR; CLASSIFICATION; SUPERNOVA;

D O I：

10.1038/s41550-022-01811-y

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 10(2) < M-BH < 10(6) solar masses (M-circle dot). 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 10(4.7)-10(5.9) M-circle dot BH. We find the observable rate of fast-rising nuclear transients like AT 2020neh to be low, at less than or similar to 2 x 10(-8) events Mpc(-3) yr(-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.

引用

页码：1452 / +

页数：15

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