MAXI J1820+070 with NuSTAR - II. Flaring during the hard to soft state transition with a long soft lag

被引：10

作者：

Buisson, D. J. K. ^{[1
,2
]}

Fabian, A. C. ^{[2
]}

Gandhi, P. ^{[1
]}

Kara, E. ^{[3
]}

Parker, M. L. ^{[4
]}

Shaw, A. W. ^{[5
]}

Tomsick, J. A. ^{[6
]}

Walton, D. J. ^{[2
]}

Wang, J. ^{[3
]}

机构：

[1] Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England

[2] Inst Astron, Madingley Rd, Cambridge CB3 0HA, England

[3] MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[4] European Space Astron Ctr ESA ESAC, E-28691 Madrid, Spain

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

[6] Univ Calif Berkeley, Space Sci Lab, 7 Gauss Way, Berkeley, CA 94720 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 500卷 / 03期

基金：

英国科学技术设施理事会; 美国国家航空航天局;

关键词：

accretion; accretion discs; black hole physics; X-rays: binaries; QUASI-PERIODIC OSCILLATIONS; X-RAY BINARY; ACCRETION DISC VISCOSITY; NGC; 5408; X-1; BLACK-HOLE; DOMINATED ACCRETION; XTE J1550-564; LIGHT CURVES; CYGNUS X-1; TIME LAGS;

D O I：

10.1093/mnras/staa3510

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We continue the analysis of NuSTAR data from the recent discovery outburst of MAXI J1820+070 (optical counterpart ASASSN-18ey), focussing on an observation including unusual flaring behaviour during the hard to soft state transition, which is a short phase of outbursts and so comparatively rarely observed. Two plateaus in flux are separated by a variable interval lasting similar to 10 ks, which shows dipping then flaring stages. The variability is strongest (with fractional variability up to F-Var similar to 10 per cent) at high energies and reduces as the contribution from disc emission becomes stronger. Flux-resolved spectra show that the variability is primarily due to the power-law flux changing. We also find a long soft lag of the thermal behind the power-law emission, which is 20(-1.2)(+1.6) s during the flaring phase. The lag during the dipping stage has a different lag-energy spectrum, which may be due to a wave passing outwards through the disc. Time-resolved spectral fitting suggests that the lag during the flaring stage may be due to the disc re-filling after being disrupted to produce the power-law flare, perhaps related to the system settling after the jet ejection which occurred around 1 d before. The time-scales of these phenomena imply a low viscosity parameter, alpha similar to 10(-3), for the inner region of the disc.

引用

页码：3976 / 3986

页数：11

共 100 条

[1] THE FAINT "HEARTBEATS" OF IGR J17091-3624: AN EXCEPTIONAL BLACK HOLE CANDIDATE [J].

Altamirano, D. ;

Belloni, T. ;

Linares, M. ;

van der Klis, M. ;

Wijnands, R. ;

Curran, P. A. ;

Kalamkar, M. ;

Stiele, H. ;

Motta, S. ;

Munoz-Darias, T. ;

Casella, P. ;

Krimm, H. .

ASTROPHYSICAL JOURNAL LETTERS, 2011, 742 (02)

[2]

[Anonymous], 2019, ASTROPHYS J, DOI DOI 10.3847/2041-8213/AB2C00

[3] A radio parallax to the black hole X-ray binary MAXI J1820+070 [J].

Atri, P. ;

Miller-Jones, J. C. A. ;

Bahramian, A. ;

Plotkin, R. M. ;

Deller, A. T. ;

Jonker, P. G. ;

Maccarone, T. J. ;

Sivakoff, G. R. ;

Soria, R. ;

Altamirano, D. ;

Belloni, T. ;

Fender, R. ;

Koerding, E. ;

Maitra, D. ;

Markoff, S. ;

Migliari, S. ;

Russell, D. ;

Russell, T. ;

Sarazin, C. L. ;

Tetarenko, A. J. ;

Tudose, V .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2020, 493 (01) :L81-L86

[4] Estimating Distance from Parallaxes. IV. Distances to 1.33 Billion Stars in Gaia Data Release 2 [J].

Bailer-Jones, C. A. L. ;

Rybizki, J. ;

Fouesneau, M. ;

Mantelet, G. ;

Andrae, R. .

ASTRONOMICAL JOURNAL, 2018, 156 (02)

[5] The evolution of the timing properties of the black-hole transient GX 339-4 during its 2002/2003 outburst [J].

Belloni, T ;

Homan, J ;

Casella, P ;

van der Klis, M ;

Nespoli, E ;

Lewin, WHG ;

Miller, JM ;

Méndez, M .

ASTRONOMY & ASTROPHYSICS, 2005, 440 (01) :207-U132

[6]

Belloni T, 2000, ASTRON ASTROPHYS, V355, P271

[7] An unstable central disk in the superluminal black hole X-ray binary GRS 1915+105 [J].

Belloni, T ;

Mendez, M ;

King, AR ;

vanderKlis, M ;

vanParadijs, J .

ASTROPHYSICAL JOURNAL, 1997, 479 (02) :L145-L148

[8]

Bogensberger D., 2020, A A, V641, P31

[9] An extremely powerful long-lived superluminal ejection from the black hole MAXI J1820+070 [J].

Bright, J. S. ;

Fender, R. P. ;

Motta, S. E. ;

Williams, D. R. A. ;

Moldon, J. ;

Plotkin, R. M. ;

Miller-Jones, J. C. A. ;

Heywood, I. ;

Tremou, E. ;

Beswick, R. ;

Sivakoff, G. R. ;

Corbel, S. ;

Buckley, D. A. H. ;

Homan, J. ;

Gallo, E. ;

Tetarenko, A. J. ;

Russell, T. D. ;

Green, D. A. ;

Titterington, D. ;

Woudt, P. A. ;

Armstrong, R. P. ;

Groot, P. J. ;

Horesh, A. ;

van der Horst, A. J. ;

Kording, E. G. ;

McBride, V. A. ;

Rowlinson, A. ;

Wijers, R. A. M. J. .

NATURE ASTRONOMY, 2020, 4 (07) :697-+

[10] MAXI J1820+070 with NuSTAR I. An increase in variability frequency but a stable reflection spectrum: coronal properties and implications for the inner disc in black hole binaries [J].

Buisson, D. J. K. ;

Fabian, A. C. ;

Barret, D. ;

Furst, F. ;

Gandhi, P. ;

Garcia, J. A. ;

Kara, E. ;

Madsen, K. K. ;

Miller, J. M. ;

Parker, M. L. ;

Shaw, A. W. ;

Tomsick, J. A. ;

Walton, D. J. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2019, 490 (01) :1350-1362

← 1 2 3 4 5 6 7 8 9 10 →