@article{aae35523898842d1b5409a92708c7a74,
title = "Constraining the nature of the accreting binary in CXOGBS J174623.5-310550",
abstract = "We report optical and infrared observations of theX-ray source CXOGBS J174623.5.310550. This Galactic object was identified as a potential quiescent low-mass X-ray binary accreting from anM-type donor on the basis of optical spectroscopy and the broadHα emission line. The analysis of X-shooter spectroscopy covering three consecutive nights supports an M2/3-type spectral classification. Neither radial velocity variations nor rotational broadening is detected in the photospheric lines. No periodic variability is found in I- and r-band light curves. We derive r = 20.8, I = 19.2, and Ks ≈ 16.6 for the optical and infrared counterparts with the M-type star contributing .90 per cent to the I-band light. We estimate its distance to be 1.3. 1.8 kpc. The lack of radial velocity variations implies that the M-type star is not the donor star in the X-ray binary. This could be an interloper or the outer body in a hierarchical triple. We constrain the accreting binary to be a ≲2.2 h orbital period eclipsing cataclysmic variable or a low-mass X-ray binary lying in the foreground of the Galactic bulge.",
keywords = "Binaries: close, Stars: individual: CXOGBS J174623.5-310550, X-rays: binaries",
author = "Torres, {M. A.P.} and S. Repetto and T. Wevers and M. Heida and Jonker, {P. G.} and Hynes, {R. I.} and G. Nelemans and Z. Kostrzewa-Rutkowska and L. Wyrzykowski and Britt, {C. T.} and Heinke, {C. O.} and J. Casares and Johnson, {C. B.} and Maccarone, {T. J.} and Steeghs, {D. T.H.}",
note = "Funding Information: Based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme ID 088.D-0096(A) and 095.D-0973(A). This research has used the SIMBAD data base, operated at CDS, Strasbourg, France, and of the NASA{\textquoteright}s Astrophysics Data System. IRAF is distributed by the National Optical Astronomy Observatory, which is operated by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation. Tom Marsh is thanked for developing and sharing his package MOLLY. We thank the anonymous referee for constructive comments. MAPT and JC acknowledge support by the Spanish Ministry of Economy, Industry, and Competitiveness (MINECO) under grant AYA2017-83216-P. MAPT also acknowledges support via a Ram{\'o}n y Cajal Fellowship (RYC-2015-17854). The work of SR was supported by the Netherlands Research School for Astronomy (NOVA). PGJ and ZKR acknowledge support from European Research Council Consolidator grant 647208. RIH and CBJ acknowledge support from NASA through Chandra Award Number AR3-14002X issued by the Chandra X-ray Observatory Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of the National Aeronautics Space Administration under contract NAS8-03060. The work of LW has been supported by the Polish National Science Centre grant no. DEC-2011/03/B/ST9/02573. The OGLE project has received funding from the National Science Centre, Poland, grant MAESTRO 2014/14/A/ST9/00121 and 2015/18/M/ST9/00544 to Andrzej Udalski. COH is supported by NSERC Discovery grant RGPIN-2016-04602, and a Discovery Accelerator Supplement. SR is thankful to Hagai Perets for his insights on the triple scenario. Publisher Copyright: {\textcopyright} 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.",
year = "2019",
month = aug,
day = "1",
doi = "10.1093/mnras/stz1405",
language = "English",
volume = "487",
pages = "2296--2306",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
number = "2",
}