2020MNRAS.493L..81A

Query : 2020MNRAS.493L..81A

2020MNRAS.493L..81A - Mon. Not. R. Astron. Soc., 493, L81 (2020/March-3)

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

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. and TUDOSE V.

Abstract (from CDS):

Using the Very Long Baseline Array and the European Very Long Baseline Interferometry Network, we have made a precise measurement of the radio parallax of the black hole X-ray binary MAXI J1820+070, providing a model-independent distance to the source. Our parallax measurement of (0.348 ± 0.033) mas for MAXI J1820+070 translates to a distance of (2.96 ± 0.33) kpc. This distance implies that the source reached (15 ± 3) per cent of the Eddington luminosity at the peak of its outburst. Further, we use this distance to refine previous estimates of the jet inclination angle, jet velocity, and the mass of the black hole in MAXI J1820+070 to be (63 ± 3)°, (0.89 ± 0.09) c, and (9.2 ± 1.3) M☉, respectively.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): astrometry - parallaxes - stars: black holes - radio continuum: transients - X-rays: binaries - high angular resolution

VizieR on-line data: <Available at CDS (J/MNRAS/493/L81): table1.dat table2.dat>

Simbad objects: 6

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Number of rows : 6
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 ICRF J181333.4+061542 BLL 18 13 33.4116177456 +06 15 42.035846688       17.48   ~ 75 1
2 MAXI J1820+070 LXB 18 20 21.9423816480 +07 11 07.284859440           ~ 511 0
3 NVSS J182127+054911 Rad 18 21 27.3024 +05 49 10.670           ~ 5 1
4 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2810 0
5 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4590 0
6 V* V404 Cyg HXB 20 24 03.8247037434 +33 52 01.961154861           G9/K0III/V 1370 0

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