2022A&A...657A.104C


Query : 2022A&A...657A.104C

2022A&A...657A.104C - Astronomy and Astrophysics, volume 657A, 104-104 (2022/1-1)

A long-lived compact jet in the black hole X-ray binary candidate AT2019wey.

CAO H.-M., MIGLIORI G., GIROLETTI M., FREY S., YANG J., GABANYI K.E., CUI L., AN T., HONG X.-Y. and ZHANG W.-D.

Abstract (from CDS):

AT2019wey is a transient discovered by the Asteroid Terrestrial-impact Last Alert System survey in December of 2019. Follow-up optical, radio, and X-ray observations led to classification of this source as a Galactic black hole X-ray binary candidate. We carried out one-epoch 6.7 GHz European Very Long Baseline Interferometry Network and two-epoch multi-frequency (1.6, 4.5, 6.7 GHz) Very Long Baseline Array observations within a year after its discovery. These observations reveal a fading and flat-spectrum radio source with no discernible motion. These features suggest the detection of a compact jet. The source appears resolved at milliarcsecond scales, and the source angular size versus frequency trend is consistent with scatter broadening. This allows us to constrain the lower limit of the source distance to 6 kpc if the scattering medium is in a Galactic spiral arm. For a source location at greater than 3 kpc, the estimated upper limit of the peculiar velocity suggests the asymmetric natal kick may have occurred during the black hole formation stage.

Abstract Copyright: © ESO 2022

Journal keyword(s): stars: individual: AT2019wey - ISM: jets and outflows - X-rays: binaries

CDS comments: Calibrator J0442+5436 not identified.

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NAME Per Arm PoG 03 30 +45.0           ~ 1432 0
2 6C 041421+544930 Bz? 04 18 19.34026781 +54 57 15.3348120           ~ 10 1
3 ATLAS 19bcxp LXB 04 35 23.280 +55 22 34.25           ~ 27 0
4 NAME Gal Anticenter reg 05 46 +28.9           ~ 838 0
5 7C 055201.39+394824.00 QSO 05 55 30.80561419 +39 48 49.1649683     18.0 17.5   ~ 492 2
6 MAXI J1659-152 LXB 16 59 01.680 -15 15 28.73           ~ 230 0
7 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13433 0
8 NAME Outer Arm PoG 21 48 +69.4           ~ 288 0

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2023.01.31-01:21:44

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