VLBA Discovery of a Resolved Source in the Candidate Black Hole X-Ray Binary AT2019wey
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1.
California Institute of Technology
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2.
National Radio Astronomy Observatory
Abstract
AT2019wey is a Galactic low-mass X-ray binary with a candidate black hole accretor first discovered as an optical transient by ATLAS in 2019 December. It was then associated with an X-ray source discovered by SRG/eROSITA and SRG/ART-XC instruments in 2020 March. After a brightening in X-rays in 2020 August, VLA observations of the source revealed an optically thin spectrum that subsequently shifted to optically thick, as the source continued to brighten in the radio. This motivated us to observe AT2019wey with the VLBA. We found a resolved source that we interpret to be a steady compact jet, a feature associated with black hole X-ray binary systems in hard X-ray spectral states. The jet power is comparable to the accretion-disk X-ray luminosity. Here, we summarize the results from these observations.
Additional Information
© 2021. The American Astronomical Society. Received 2020 December 24; revised 2021 February 25; accepted 2021 February 25; published 2021 March 16. We thank Tim Pearson, Gregg Hallinan, and Katie Bouman for useful discussions on interpreting these results. These observations were conducted with the Very Long Baseline Array. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. This research has made use of NASA's Astrophysics Data System.Attached Files
Published - Yadlapalli_2021_ApJL_909_L27.pdf
Submitted - 2012.13426.pdf
Files
2012.13426.pdf
Additional details
Identifiers
- Eprint ID
- 107857
- Resolver ID
- CaltechAUTHORS:20210202-095234473
Related works
- Describes
- https://arxiv.org/abs/2012.13426 (URL)
Funding
- NSF
Dates
- Created
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2021-02-03Created from EPrint's datestamp field
- Updated
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2021-04-08Created from EPrint's last_modified field
Caltech Custom Metadata
- Caltech groups
- Astronomy Department , Division of Geological and Planetary Sciences (GPS)