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The First Low-Mass ...
The First Low-Mass Black Hole X-Ray Binary Identified in Quiscence Outside of a Globular Cluster
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- Tetarenko, B. E. (författare)
- University of Alberta
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- Bahramian, A. (författare)
- University of Alberta
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- Arnason, R. M. (författare)
- Western University,University of Alberta
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- Miller-Jones, J. C. A. (författare)
- Curtin University
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- Repetto, S. (författare)
- Technion – Israel Institute of Technology,Radboud Universiteit,Radboud University
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- Heinke, C. O. (författare)
- University of Alberta
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- Maccarone, T. J. (författare)
- Texas Tech University at Lubbock
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- Chomiuk, L. (författare)
- Michigan State University
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- Sivakoff, G. R. (författare)
- University of Alberta
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- Strader, J. (författare)
- Michigan State University
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- Kirsten, F. (författare)
- Curtin University
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- Vlemmings, Wouter, 1974 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2016
- 2016
- Engelska.
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Ingår i: Astrophysical Journal. - 1538-4357 .- 0004-637X. ; 825:1
- Relaterad länk:
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http://publications.... (primary) (free)
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https://research.cha...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- The observed relation between the X-ray and radio properties of low-luminosity accreting black holes (BHs) has enabled the identification of multiple candidate black hole X-ray binaries (BHXBs) in globular clusters (GCs). Here, we report an identification of the radio source VLA J213002.08+120904 (aka M15 S2), recently reported in Kirsten et al., as a BHXB candidate. They showed that the parallax of this flat-spectrum variable radio source indicates a - + 2.2 0.30.5 kpc distance, which identifies it as lying in the foreground of the GC M15. We determine the radio characteristics of this source and place a deep limit on the X-ray luminosity of ∼4 × 1029 erg s.1. Furthermore, we astrometrically identify a faint red stellar counterpart in archival Hubble images with colors consistent with a foreground star; at 2.2 kpc, its inferred mass is 0.1-0.2Me. We rule out that this object is a pulsar, neutron star X-ray binary, cataclysmic variable, or planetary nebula, concluding that VLA J213002.08+120904 is the first accreting BHXB candidate discovered in quiescence outside of a GC. Given the relatively small area over which parallax studies of radio sources have been performed, this discovery suggests a much larger population of quiescent BHXBs in our Galaxy, 2.6 ± 104-1.7 × 108 BHXBs at 3× confidence, than has been previously estimated (∼102-104) through population synthesis.The observed relation between the X-ray and radio properties of low-luminosity accreting black holes (BHs) has enabled the identification of multiple candidate black hole X-ray binaries (BHXBs) in globular clusters (GCs). Here, we report an identification of the radio source VLA J213002.08+120904 (aka M15 S2), recently reported in Kirsten et al., as a BHXB candidate. They showed that the parallax of this flat-spectrum variable radio source indicates a - + 2.2 0.30.5 kpc distance, which identifies it as lying in the foreground of the GC M15. We determine the radio characteristics of this source and place a deep limit on the X-ray luminosity of ∼4 × 1029 erg s.1. Furthermore, we astrometrically identify a faint red stellar counterpart in archival Hubble images with colors consistent with a foreground star; at 2.2 kpc, its inferred mass is 0.1-0.2Me. We rule out that this object is a pulsar, neutron star X-ray binary, cataclysmic variable, or planetary nebula, concluding that VLA J213002.08+120904 is the first accreting BHXB candidate discovered in quiescence outside of a GC. Given the relatively small area over which parallax studies of radio sources have been performed, this discovery suggests a much larger population of quiescent BHXBs in our Galaxy, 2.6 ± 104-1.7 × 108 BHXBs at 3× confidence, than has been previously estimated (∼102-104) through population synthesis.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- black hole physics
- stars: individual (VLA J213002.08+120904)
- X-rays: binaries
- radio continuum: general
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Tetarenko, B. E.
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Bahramian, A.
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Arnason, R. M.
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Miller-Jones, J. ...
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Repetto, S.
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Heinke, C. O.
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visa fler...
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Maccarone, T. J.
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Chomiuk, L.
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Sivakoff, G. R.
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Strader, J.
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Kirsten, F.
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Vlemmings, Woute ...
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