An extremely powerful long-lived superluminal ejection from the black hole MAXI J1820+070

被引：86

作者：

Bright, J. S. ^{[1
]}

Fender, R. P. ^{[1
,2
]}

Motta, S. E. ^{[1
]}

Williams, D. R. A. ^{[1
]}

Moldon, J. ^{[3
,4
]}

Plotkin, R. M. ^{[5
,6
]}

Miller-Jones, J. C. A. ^{[6
]}

Heywood, I. ^{[1
,7
,8
]}

Tremou, E. ^{[9
]}

Beswick, R. ^{[4
]}

Sivakoff, G. R. ^{[10
]}

Corbel, S. ^{[9
,11
]}

Buckley, D. A. H. ^{[12
]}

Homan, J. ^{[13
,14
,15
]}

Gallo, E. ^{[16
]}

Tetarenko, A. J. ^{[17
]}

Russell, T. D. ^{[18
]}

Green, D. A. ^{[19
]}

Titterington, D. ^{[19
]}

Woudt, P. A. ^{[2
,20
]}

Armstrong, R. P. ^{[1
,2
,8
]}

Groot, P. J. ^{[2
,12
,21
]}

Horesh, A. ^{[22
]}

van der Horst, A. J. ^{[23
,24
]}

Kording, E. G. ^{[21
]}

McBride, V. A. ^{[2
,25
]}

Rowlinson, A. ^{[18
,26
]}

Wijers, R. A. M. J. ^{[18
]}

机构：

[1] Univ Oxford, Dept Phys, Astrophys, Oxford, England

[2] Univ Cape Town, Dept Astron, Rondenbosch, South Africa

[3] IAA, CSIC, Granada, Spain

[4] Univ Manchester, Jodrell Bank Ctr Astrophys, Manchester, Lancs, England

[5] Univ Nevada, Dept Phys, Reno, NV 89557 USA

[6] Curtin Univ, Int Ctr Radio Astron Res, Perth, WA, Australia

[7] Rhodes Univ, Dept Phys & Elect, Grahamstown, South Africa

[8] SARAO, Cape Town, South Africa

[9] Univ Paris Diderot, CNRS, AIM CEA Paris Saclay, Gif Sur Yvette, France

[10] Univ Alberta, Dept Phys, Edmonton, AB, Canada

[11] Univ Orleans, CNRS, PSL Res Univ, Stat Radioastron Nancay,Observ Paris, Nancay, France

[12] South African Astron Observ, Cape Town, South Africa

[13] Eurika Sci Inc, Oakland, CA USA

[14] SRON Netherlands Inst Space Res, SRON, Utrecht, Netherlands

[15] MIT Kavli Inst Astrophys & Space Res, Cambridge, MA USA

[16] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA

[17] East Asian Observ, Hilo, HI USA

[18] Univ Amsterdam, Anton Pannekoek Inst, Amsterdam, Netherlands

[19] Cavendish Lab, Astrophys Grp, Cambridge, England

[20] Univ Cape Town, Interuniv Inst Data Intens Astron, Dept Astron, Cape Town, South Africa

[21] Radboud Univ Nijmegen, IMAPP, Dept Astrophys, Nijmegen, Netherlands

[22] Hebrew Univ Jerusalem, Inst Phys, Jerusalem, Israel

[23] George Washington Univ, Dept Phys, Washington, DC USA

[24] APSIS, Washington, DC USA

[25] IAU Off Astron Dev, Cape Town, South Africa

[26] Netherlands Inst Radio Astron ASTRON, Dwingeloo, Netherlands

来源：

NATURE ASTRONOMY | 2020年 / 4卷 / 07期

基金：

新加坡国家研究基金会; 澳大利亚研究理事会; 欧洲研究理事会;

关键词：

X-RAY JETS; LARGE-SCALE; RELATIVISTIC JETS; XTE J1550-564; EMISSION; OUTBURST; ORIGIN; MODEL; GHZ;

D O I：

10.1038/s41550-020-1023-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Radio observations of black hole MAXI J1820+070's 2018 outburst captured an isolated radio flare that the authors connect with the launch of bipolar relativistic ejecta. Following the oncoming ejecta for more than half a year reveals that black hole jet energetics have been systematically underestimated. Black holes in binary systems execute patterns of outburst activity where two characteristic X-ray states are associated with different behaviours observed at radio wavelengths. The hard state is associated with radio emission indicative of a continuously replenished, collimated, relativistic jet, whereas the soft state is rarely associated with radio emission, and never continuously, implying the absence of a quasi-steady jet. Here we report radio observations of the black hole transient MAXI J1820+070 during its 2018 outburst. As the black hole transitioned from the hard to soft state, we observed an isolated radio flare, which, using high-angular-resolution radio observations, we connect with the launch of bipolar relativistic ejecta. This flare occurs as the radio emission of the core jet is suppressed by a factor of over 800. We monitor the evolution of the ejecta over 200 days and to a maximum separation of 10 '', during which period it remains detectable due to in situ particle acceleration. Using simultaneous radio observations sensitive to different angular scales, we calculate an accurate estimate of energy content of the approaching ejection. This energy estimate is far larger than that derived from the state transition radio flare, suggesting a systematic underestimate of jet energetics.

引用

页码：697 / +

页数：11

共 55 条

[1]

[Anonymous], 2018, Astron. Telegr.

[2]

Arnaud KA, 1996, ASTR SOC P, V101, P17

[3]

Atri P, 2019, RADIO PARALLAX BLACK

[4] HYDROMAGNETIC FLOWS FROM ACCRETION DISKS AND THE PRODUCTION OF RADIO JETS [J].