2021MNRAS.504.2168G

Query : 2021MNRAS.504.2168G

2021MNRAS.504.2168G - Mon. Not. R. Astron. Soc., 504, 2168-2180 (2021/June-3)

Physical origin of the non-physical spin evolution of MAXI J1820 + 070.

GUAN J., TAO L., QU J.L., ZHANG S.N., ZHANG W., ZHANG S., MA R.C., GE M.Y., SONG L.M., LU F.J., LI T.P., XU Y.P., CHEN Y., CAO X.L., LIU C.Z., ZHANG L., WANG Y.N., CHEN Y.P., BU Q.C., CAI C., CHANG Z., CHEN L., CHEN T.X., CHEN Y.B., CUI W.W., DU Y.Y., GAO G.H., GAO H., GU Y.D., GUO C.C., HAN D.W., HUANG Y., HUO J., JIA S.M., JIANG W.C., JIN J., KONG L.D., LI B., LI C.K., LI G., LI W., LI X., LI X.B., LI X.F., LI Z.W., LIANG X.H., LIAO J.Y., LIU B.S., LIU H.W., LIU H.X., LIU X.J., LU X.F., LUO Q., LUO T., MA X., MENG B., NANG Y., NIE J.Y., OU G., REN X.Q., SAI N., SONG X.Y., SUN L., TAN Y., WANG C., WANG L.J., WANG P.J., WANG W.S., WANG Y.S., WEN X.Y., WU B.B., WU B.Y., WU M., XIAO G.C., XIAO S., XIONG S.L., YANG R.J., YANG S., YANG Y.J., YANG Y.J., YI Q.B., YIN Q.Q., YOU Y., ZHANG F., ZHANG H.M., ZHANG J., ZHANG P., ZHANG W.C., ZHANG Y.F., ZHANG Y.H., ZHAO H.S., ZHAO X.F., ZHENG S.J., ZHENG Y.G. and ZHOU D.K.

Abstract (from CDS):

We report on the Insight-HXMT observations of the new black hole X-ray binary MAXI J1820+070 during its 2018 outburst. Detailed spectral analysis via the continuum fitting method shows an evolution of the inferred spin during its high soft sate. Moreover, the hardness ratio, the non-thermal luminosity and the reflection fraction also undergo an evolution, exactly coincident to the period when the inferred spin transition takes place. The unphysical evolution of the spin is attributed to the evolution of the inner disc, which is caused by the collapse of a hot corona due to condensation mechanism or may be related to the deceleration of a jet-like corona. The studies of the inner disc radius and the relation between the disc luminosity and the inner disc radius suggest that, only at a particular epoch, did the inner edge of the disc reach the innermost stable circular orbit and the spin measurement is reliable. We then constrain the spin of MAXI J1820 + 070 to be a*=0.2+0.2^–0.3. Such a slowly spinning black hole possessing a strong jet suggests that its jet activity is driven mainly by the accretion disc rather than by the black hole spin.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): accretion, accretion discs - black hole physics - stars: individual: (MAXI J1820 + 070) - X-rays: binaries

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 MAXI J1820+070 LXB 18 20 21.9423816480 +07 11 07.284859440           ~ 511 0

Query : 2021MNRAS.504.2168G

Basic data :
MAXI J1820+070 -- Low Mass X-ray Binary
Other object types: otypes_help 		X (2022MNRAS,MAXI), MIR (WISEA,WISE), ev (AT,Gaia), LXB (2018ApJ), * (Gaia), NIR (2MASS), Opt (LAMOST)
ICRS coord. (ep=J2000) : 		18 20 21.9423816480 +07 11 07.284859440 (Optical) [ 0.0613 0.0678 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		18 17 56.5515459820 +07 09 43.917239167 [ 0.0613 0.0678 90 ]
Gal coord. (ep=J2000) : 		035.8535790606644 +10.1591590860057 [ 0.0613 0.0678 90 ]
Proper motions mas/yr : 		-3.093 -6.286 [0.091 0.094 90] A 2020yCat.1350....0G
Parallaxes (mas): 		0.3692 [0.078] A 2020yCat.1350....0G
Fluxes (4) :
G 17.386671 [0.031558] C 2020yCat.1350....0G
J 15.867 [0.066] C 2003yCat.2246....0C
H 15.444 [0.102] D 2003yCat.2246....0C
K 15.118 [0.120] D 2003yCat.2246....0C
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Identifiers (12) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

2MASS J18202194+0711073 LAMOST J182021.96+071107.2 WISEA J182021.94+071107.2 Gaia DR2 4477902563164690816
ASASSN -18ey MAXI J1820+070 WISE J182021.94+071107.2 Gaia 18as
AT 2018amn TIC 317984780 Gaia DR3 4477902563164690816 Gaia DR1 4477902563164690816

References (511 between 1850 and 2026) (Total 511)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Var : 1    Plx : 2    PM : 2   

   

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Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

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2MASS J18202194+0711073 WISEA J182021.94+071107.2 WISE J182021.94+071107.2 Gaia DR3 4477902563164690816 Gaia DR2 4477902563164690816
Gaia DR1 4477902563164690816

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