Two Long-period Cataclysmic Variable Stars: ASASSN-14ho and V1062 Cyg
AuthorGasque, L. Claire
Hening, Callum A.
Hviding, Raphael E.
Thorstensen, John R.
Woudt, Patrick A.
AffiliationUniv Arizona, Steward Observ
MetadataShow full item record
PublisherIOP PUBLISHING LTD
CitationL. Claire Gasque et al 2019 AJ 158 156
RightsCopyright © 2019. The American Astronomical Society. All rights reserved.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at email@example.com.
AbstractWe report spectroscopy and photometry of the cataclysmic variable stars ASASSN-14ho and V1062 Cyg. Both are dwarf novae with spectra dominated by their secondary stars, which we classify approximately as K4 and M0.5, respectively. Their orbital periods, determined mostly from the secondary stars' radial velocities, proved to be nearly identical, respectively 350.14 +/- 0.15 and 348.25 +/- 0.60 minutes. The H alpha emission line in V1062 Cyg displays a relatively sharp emission component that tracks the secondary's motion, which may arise on the irradiated face of the secondary; this is not often seen and may indicate an unusually strong flux of ionizing radiation. Both systems exhibit double-peaked orbital modulation consistent with ellipsoidal variation from the changing aspect of the secondary. We model these variations to constrain the orbital inclination i, and estimate approximate component masses based on i and the secondary velocity amplitude K-2.
VersionFinal published version
SponsorsUniversity of Cape Town; Dartmouth College's Frank J. Guarini Institute for International Education; Robert Martin Ayers Sciences Fund; National Science FoundationNational Science Foundation (NSF); National Research Foundation of South AfricaNational Research Foundation - South Africa; National Research Foundation of South Africa (NRF) through a South African Radio Astronomy Observatory (SARAO) bursary; University of Cape Town (UCT)