Similarities and Differences in Spectral Behavior Between W Ser and UX Mon in the UV

Details Similarities and Differences in Spectral Behavior Between W Ser and UX Mon in the UV Similarities and Differences in Spectral Behavior Between W Ser and UX Mon in the UV

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21943303b&link_type=abstract

American Astronomical Society, AAS Meeting #219, #433.03

Astronomy and Astrophysics

Astronomy

Scientific paper

We present ultraviolet spectra of two eclipsing interacting binary systems, W Ser and UX Mon. The data contain good coverage over the 14.16-day and 5.9-day orbital periods, respectively, using observations taken by the International Ultraviolet Explorer (IUE) during periods between 1978 - 1993 and 1981 - 1991 for the two systems respectively. Two profiles of both W Ser and UX Mon showing variations of line fluxes at two orbital phases are presented. We investigated the N V emission line at 1240 Å, C II emission line at 1336 Å, C IV emission line at 1550 Å, O III emission line at 1666 Å, and Si III emission line at 1892 Å (which are produced in an extended gaseous envelope around the mass-gaining component), by calculating the line fluxes of these spectral lines. Our results show that there are spectral variations of line fluxes at different orbital phases, correlated with the light curves found for both W Ser and UX Mon. We attribute these spectral variations to effects from the eclipse and to variations in the mass transfer rate.
M.B. acknowledges support from NASA, through grant number HST-AR-10304.04-A from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555.

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