GS 2000+25: The Least Luminous Black Hole X-Ray Binary
© 2020. The American Astronomical Society. All rights reserved.. Little is known about the properties of the accretion flows and jets of the lowest-luminosity quiescent black holes. We report new, strictly simultaneous radio and X-ray observations of the nearby stellar-mass black hole X-ray binary G...
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| Format: | Journal Article |
| Language: | English |
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IOP PUBLISHING LTD
2020
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| Online Access: | http://purl.org/au-research/grants/arc/FT140101082 http://hdl.handle.net/20.500.11937/80166 |
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| author | Rodriguez, J. Urquhart, R. Plotkin, Richard Panurach, T. Chomiuk, L. Strader, J. Miller-Jones, James Gallo, E. Sivakoff, G.R. |
| author_facet | Rodriguez, J. Urquhart, R. Plotkin, Richard Panurach, T. Chomiuk, L. Strader, J. Miller-Jones, James Gallo, E. Sivakoff, G.R. |
| author_sort | Rodriguez, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2020. The American Astronomical Society. All rights reserved.. Little is known about the properties of the accretion flows and jets of the lowest-luminosity quiescent black holes. We report new, strictly simultaneous radio and X-ray observations of the nearby stellar-mass black hole X-ray binary GS 2000+25 in its quiescent state. In deep Chandra observations we detect the system at a faint X-ray luminosity of erg s-1 (1-10 keV). This is the lowest X-ray luminosity yet observed for a quiescent black hole X-ray binary, corresponding to an Eddington ratio L X/L Edd ∼ 10-9. In 15 hours of observations with the Karl G. Jansky Very Large Array, no radio continuum emission is detected to a 3σ limit of <2.8 μJy at 6 GHz. Including GS 2000+25, four quiescent stellar-mass black holes with L X < 1032 erg s-1 have deep simultaneous radio and X-ray observations and known distances. These sources all have radio to X-ray luminosity ratios generally consistent with, but slightly lower than, the low-state radio/X-ray correlation for stellar-mass black holes with L X > 1032 erg s-1. Observations of these sources tax the limits of our current X-ray and radio facilities, and new routes to black hole discovery are needed to study the lowest-luminosity black holes. |
| first_indexed | 2025-11-14T11:15:05Z |
| format | Journal Article |
| id | curtin-20.500.11937-80166 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:15:05Z |
| publishDate | 2020 |
| publisher | IOP PUBLISHING LTD |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-801662022-03-15T01:29:39Z GS 2000+25: The Least Luminous Black Hole X-Ray Binary Rodriguez, J. Urquhart, R. Plotkin, Richard Panurach, T. Chomiuk, L. Strader, J. Miller-Jones, James Gallo, E. Sivakoff, G.R. Science & Technology Physical Sciences Astronomy & Astrophysics QUIESCENT STATE HARD STATE NOVA MASS LIMITS © 2020. The American Astronomical Society. All rights reserved.. Little is known about the properties of the accretion flows and jets of the lowest-luminosity quiescent black holes. We report new, strictly simultaneous radio and X-ray observations of the nearby stellar-mass black hole X-ray binary GS 2000+25 in its quiescent state. In deep Chandra observations we detect the system at a faint X-ray luminosity of erg s-1 (1-10 keV). This is the lowest X-ray luminosity yet observed for a quiescent black hole X-ray binary, corresponding to an Eddington ratio L X/L Edd ∼ 10-9. In 15 hours of observations with the Karl G. Jansky Very Large Array, no radio continuum emission is detected to a 3σ limit of <2.8 μJy at 6 GHz. Including GS 2000+25, four quiescent stellar-mass black holes with L X < 1032 erg s-1 have deep simultaneous radio and X-ray observations and known distances. These sources all have radio to X-ray luminosity ratios generally consistent with, but slightly lower than, the low-state radio/X-ray correlation for stellar-mass black holes with L X > 1032 erg s-1. Observations of these sources tax the limits of our current X-ray and radio facilities, and new routes to black hole discovery are needed to study the lowest-luminosity black holes. 2020 Journal Article http://hdl.handle.net/20.500.11937/80166 10.3847/1538-4357/ab5db5 English http://purl.org/au-research/grants/arc/FT140101082 IOP PUBLISHING LTD fulltext |
| spellingShingle | Science & Technology Physical Sciences Astronomy & Astrophysics QUIESCENT STATE HARD STATE NOVA MASS LIMITS Rodriguez, J. Urquhart, R. Plotkin, Richard Panurach, T. Chomiuk, L. Strader, J. Miller-Jones, James Gallo, E. Sivakoff, G.R. GS 2000+25: The Least Luminous Black Hole X-Ray Binary |
| title | GS 2000+25: The Least Luminous Black Hole X-Ray Binary |
| title_full | GS 2000+25: The Least Luminous Black Hole X-Ray Binary |
| title_fullStr | GS 2000+25: The Least Luminous Black Hole X-Ray Binary |
| title_full_unstemmed | GS 2000+25: The Least Luminous Black Hole X-Ray Binary |
| title_short | GS 2000+25: The Least Luminous Black Hole X-Ray Binary |
| title_sort | gs 2000+25: the least luminous black hole x-ray binary |
| topic | Science & Technology Physical Sciences Astronomy & Astrophysics QUIESCENT STATE HARD STATE NOVA MASS LIMITS |
| url | http://purl.org/au-research/grants/arc/FT140101082 http://hdl.handle.net/20.500.11937/80166 |