Constraining the nature of the accreting binary in CXOGBS J174623.5-310550

M. A.P. Torres; S. Repetto; T. Wevers; M. Heida; P. G. Jonker; R. I. Hynes; G. Nelemans; Z. Kostrzewa-Rutkowska; L. Wyrzykowski; C. T. Britt; C. O. Heinke; J. Casares; C. B. Johnson; T. J. Maccarone; D. T.H. Steeghs

doi:10.1093/mnras/stz1405

Constraining the nature of the accreting binary in CXOGBS J174623.5-310550

M. A.P. Torres, S. Repetto, T. Wevers, M. Heida, P. G. Jonker, R. I. Hynes, G. Nelemans, Z. Kostrzewa-Rutkowska, L. Wyrzykowski, C. T. Britt, C. O. Heinke, J. Casares, C. B. Johnson, T. J. Maccarone, D. T.H. Steeghs

Physics

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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 K_s ≈ 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.

Original language	English
Pages (from-to)	2296-2306
Number of pages	11
Journal	Monthly Notices of the Royal Astronomical Society
Volume	487
Issue number	2
DOIs	https://doi.org/10.1093/mnras/stz1405
State	Published - Aug 1 2019

Keywords

Binaries: close
Stars: individual: CXOGBS J174623.5-310550
X-rays: binaries

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Torres, M. A. P., Repetto, S., Wevers, T., Heida, M., Jonker, P. G., Hynes, R. I., Nelemans, G., Kostrzewa-Rutkowska, Z., Wyrzykowski, L., Britt, C. T., Heinke, C. O., Casares, J., Johnson, C. B., Maccarone, T. J., & Steeghs, D. T. H. (2019). Constraining the nature of the accreting binary in CXOGBS J174623.5-310550. Monthly Notices of the Royal Astronomical Society, 487(2), 2296-2306. https://doi.org/10.1093/mnras/stz1405

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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 = "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",

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Torres, MAP, Repetto, S, Wevers, T, Heida, M, Jonker, PG, Hynes, RI, Nelemans, G, Kostrzewa-Rutkowska, Z, Wyrzykowski, L, Britt, CT, Heinke, CO, Casares, J, Johnson, CB, Maccarone, TJ & Steeghs, DTH 2019, 'Constraining the nature of the accreting binary in CXOGBS J174623.5-310550', Monthly Notices of the Royal Astronomical Society, vol. 487, no. 2, pp. 2296-2306. https://doi.org/10.1093/mnras/stz1405

TY - JOUR

T1 - Constraining the nature of the accreting binary in CXOGBS J174623.5-310550

AU - Torres, M. A.P.

AU - Repetto, S.

AU - Wevers, T.

AU - Heida, M.

AU - Jonker, P. G.

AU - Hynes, R. I.

AU - Nelemans, G.

AU - Kostrzewa-Rutkowska, Z.

AU - Wyrzykowski, L.

AU - Britt, C. T.

AU - Heinke, C. O.

AU - Casares, J.

AU - Johnson, C. B.

AU - Maccarone, T. J.

AU - Steeghs, D. T.H.

PY - 2019/8/1

Y1 - 2019/8/1

N2 - 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.

AB - 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.

KW - Binaries: close

KW - Stars: individual: CXOGBS J174623.5-310550

KW - X-rays: binaries

UR - http://www.scopus.com/inward/record.url?scp=85071170964&partnerID=8YFLogxK

U2 - 10.1093/mnras/stz1405

DO - 10.1093/mnras/stz1405

M3 - Article

AN - SCOPUS:85071170964

SN - 0035-8711

VL - 487

SP - 2296

EP - 2306

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

Constraining the nature of the accreting binary in CXOGBS J174623.5-310550

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