Title

Radial Velocity Studies Of Heii And Hβ Emission From Cataclysmic Variables

Keywords

Accretion; Accretion disks; Binaries: close; Binaries: general; Cataclysmic variables; Hydrodynamics; Novae; Radial velocity curves; Stars: dwarf novae

Abstract

Radial velocity (RV) plots of HeII and Hβ emission lines from non-magnetic Cataclysmic Variable (CV) systems are frequently fit with a sin curve but sometimes contain outlying data points around phase ∼1.0. A lack of consensus exists on the origin of these outlying points. In this work, we develop an analytical model that is based upon our 3D Smoothed Particle Hydrodynamic (SPH) numerical model to simulate these RV curves. Our chosen targets are CV SW Sextanis-like systems UX Uma and RW Tri as well as SU UMa dwarf novae systems Hα0242-28 and 1RXSJ1808+10, which have secondary-to-primary mass ratios of q = (0.43, 0.86, 0.27, 0.18), respectively. In our model, we include disk eccentricity, inclination angle, degree of disk-tilt, bright spot (s), and/or gas stream overflow. Our model provides good non-sinusoidal fits to the observed RV data, including outlying data points near ∼1.0, suggesting these excess points may be caused by gas-stream overflow.© 2013 Elsevier B.V. All rights reserved.

Publication Date

1-1-2014

Publication Title

New Astronomy

Volume

27

Number of Pages

73-80

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.newast.2013.08.006

Socpus ID

84885600845 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84885600845

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