A multiwavelength view of the outflowing short-period X-ray binary UW CrB

ABSTRACT Previous work detected transient ultraviolet outflow features for the short-period (P$_{\mathrm{orb}}{\approx }111$ min), low-mass X-ray binary (LMXB) UW CrB, suggesting the presence of a disc wind in the system. However, because of the transient nature of the outflow features, and the limited amount of data available, the features were challenging to interpret. To follow up on this work, we present a comprehensive multiwavelength campaign on UW CrB. We observe complex phenomenology and find several features that could be naturally interpreted as being associated with a persistent disc wind. Moreover, we identify a blue-shifted absorption in the H $\beta$ line during one of the epochs, which might be the signature of such an outflow. We present an X-ray to radio campaign of the source, discuss our results in the context of accretion disc wind outflows, present a ‘toy model’ interpretation of the outflow scattering the X-ray emission into our line of sight, and explore the implications for binary evolution models. If correct, our preferred scenario of a persistent disc wind suggests that mass transfer for LMXBs can be non-conservative down to short orbital periods, and thereby opens an important parameter space for angular momentum loss in compact binaries.

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Publication Details

Journal
Monthly Notices of the Royal Astronomical Society
Published
2025-10-20
DOI
https://doi.org/10.1093/mnras/staf1790
Citations
1
Primary Topic
Atomic and Subatomic Physics Research
Type
article
Field-Weighted Citation Impact
1.25

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article

A multiwavelength view of the outflowing short-period X-ray binary UW CrB

J V Hernández Santisteban, Lauren Rhodes, M. Armas Padilla, N. Degenaar et al.
1 citations
Monthly Notices of the Royal Astronomical Society
Atomic and Subatomic Physics Research
1.25
article

A multiwavelength view of the outflowing short-period X-ray binary UW CrB

J V Hernández Santisteban, Lauren Rhodes, M. Armas Padilla, N. Degenaar, Noel Castro Segura, Thomas J. Maccarone, S Fijma, Joe Bright, C. Knigge, D. Mata Sánchez, J. van den Eijnden, David A. Green, T. Muñoz‐Darias
article en
1 citations

Abstract

ABSTRACT Previous work detected transient ultraviolet outflow features for the short-period (P$_{\mathrm{orb}}{\approx }111$ min), low-mass X-ray binary (LMXB) UW CrB, suggesting the presence of a disc wind in the system. However, because of the transient nature of the outflow features, and the limited amount of data available, the features were challenging to interpret. To follow up on this work, we present a comprehensive multiwavelength campaign on UW CrB. We observe complex phenomenology and find several features that could be naturally interpreted as being associated with a persistent disc wind. Moreover, we identify a blue-shifted absorption in the H $\beta$ line during one of the epochs, which might be the signature of such an outflow. We present an X-ray to radio campaign of the source, discuss our results in the context of accretion disc wind outflows, present a ‘toy model’ interpretation of the outflow scattering the X-ray emission into our line of sight, and explore the implications for binary evolution models. If correct, our preferred scenario of a persistent disc wind suggests that mass transfer for LMXBs can be non-conservative down to short orbital periods, and thereby opens an important parameter space for angular momentum loss in compact binaries.

Monthly Notices of the Royal Astronomical SocietyVol. 544(4)
Texas Tech University (US), Universidad de La Laguna (ES), University of St Andrews (GB), University of Warwick (GB), University of Oxford (GB), Bridge University (SS), Breakthrough (US), Instituto de Astrofísica de Canarias (ES), Astronomical Institute of the Slovak Academy of Sciences (SK), University of Southampton (GB), McGill University (CA), University of Amsterdam (NL)
National Aeronautics and Space Administration, Texas Tech University, Space Telescope Science Institute, Ministerio de Ciencia, Innovación y Universidades, University of Leicester, European Commission, Leids Kerkhoven-Bosscha Fonds, European Southern Observatory, Instituto de Astrofísica de Canarias, HORIZON EUROPE Framework Programme, Science and Technology Facilities Council, Agencia Estatal de Investigación
Openalex Percentile: Top 16%
Atomic and Subatomic Physics Research
1.25
DOIOpen Access PDFOpenAlex
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