A Systematic Search for Near-Infrared Counterparts of Nearby Ultraluminous X-ray sources (II)
López, K.M.; Heida, M.; Jonker, P.G.; Torres, M.A.P.; Roberts, T.P.; Walton, D.J.; Moon, D.-S.; Harrison, F.A.
Professor Tim Roberts email@example.com
We present the results of our continued systematic search for near-infrared (NIR) candidate counterparts to ultraluminous X-ray sources (ULXs) within 10 Mpc. We observed 42 ULXs in 24 nearby galaxies and detected NIR candidate counterparts to 15 ULXs. Fourteen of these ULXs appear to have a single candidate counterpart in our images and the remaining ULX has 2 candidate counterparts. Seven ULXs have candidate counterparts with absolute magnitudes in the range between -9.26 and -11.18 mag, consistent with them being red supergiants (RSGs). The other eight ULXs have candidate counterparts with absolute magnitudes too bright to be a single stellar source. Some of these NIR sources show extended morphology or colours expected for Active Galactic Nuclei (AGN), strongly suggesting that they are likely stellar clusters or background galaxies. The red supergiant candidate counterparts form a valuable sample for follow-up spectroscopic observations to confirm their nature, with the ultimate goal of directly measuring the mass of the compact accretor that powers the ULX using binary Doppler shifts.
López, K., Heida, M., Jonker, P., Torres, M., Roberts, T., Walton, D., …Harrison, F. (2017). A Systematic Search for Near-Infrared Counterparts of Nearby Ultraluminous X-ray sources (II). Monthly Notices of the Royal Astronomical Society, 469(1), 671-682. https://doi.org/10.1093/mnras/stx857
|Journal Article Type||Article|
|Acceptance Date||Apr 4, 2017|
|Online Publication Date||Apr 6, 2017|
|Publication Date||Jul 21, 2017|
|Deposit Date||Apr 7, 2017|
|Publicly Available Date||Apr 18, 2017|
|Journal||Monthly Notices of the Royal Astronomical Society|
|Publisher||Royal Astronomical Society|
|Peer Reviewed||Peer Reviewed|
|Related Public URLs||https://arxiv.org/abs/1704.01068|
Accepted Journal Article
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. ©: 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Published Journal Article
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