UGPS J194310+183851: an unusual optical and X-ray faint cataclysmic variable?
Abstract
The growing number of multi-epoch optical and infrared sky surveys are uncovering unprecedented numbers of new variable stars, of an increasing number of types. The short interval between observations in adjacent near-infrared filters in the UKIDSS Galactic Plane Survey (UGPS) allows for the discovery of variability on the time-scale of minutes. We report on the nature of one such object, through the use of optical spectroscopy, time series photometry, and targeted X-ray observations. We propose that UGPS J194310.32+183851.8 is a magnetic cataclysmic variable star of novel character, probably featuring a longer than average spin period and an orbital period likely to be shorter than the period gap (i.e. Porb < 2 h). We reason that the star is likely a member of the short-period intermediate-polar subclass that exists below this period boundary, but with the additional feature that system’s spectral energy distribution is fainter and redder than other members of the group.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 21, 2022
- Source ID
- 10.1093/mnras/stac1718
Entities
People
- C T Britt
- C. S. Morris
- J Strader
- Janet E. Drew
- Nathan Miller
- P. W. Lucas
- S J Swihart
- Thomas J. Maccarone
- William Cooper
- Zhen Guo
Organizations
- CONICYT
- California Department of Pesticide Regulation
- Michigan State University
- National Academies of Sciences, Engineering, and Medicine
- National Aeronautics and Space Administration
- National Fund for Scientific and Technological Development
- National Institute for Astrophysics
- National Science Foundation
- Nuclear Regulatory Commission
- Science and Technology Facilities Council
- Space Telescope Science Institute
- Texas Tech University
- United States Naval Research Laboratory
- University College London
- University of Hertfordshire
- University of Valparaíso