Temporal UV emission from the peculiar star RX Puppis.
Abstract
The peculiar emission star RX Puppis was monitored with the International Ultraviolet Explorer in low and high dispersion. The ultraviolet spectrum of RX Ruppis is characterized by strong permitted and intercombination emission lines similar to that observed in slow novae and symbiotic stars. The absolute emission fluxes of most lines appear to have increased since the first year of observations, during which the reasonance doublet of C IV lambda lambda1548,1550 increased by approximately 14 percent. During this period the intensity ratio of the C II I(lambda1548)/I(lambda1550) typically had values less than unity, and thus exceeded the optically thick limit. Over the several years of observations following maximum UV emission, the doublet ratio appears to be approaching values approximately 1. C IV doublet ratios 1 could be explained by P-Cygni structure in the lambda1550.7 line, in which the broad absorption component deminishes emission at lambda1548.2 during ejection. This would imply expansion velocities 500 Km/s. The high dispersion line profile structure in both permitted and intercombination lines appear generally complex and time dependent.
- Publication:
-
NASA Conference Publication
- Pub Date:
- December 1984
- Bibcode:
- 1984NASCP2349..326K
- Keywords:
-
- Astronomy;
- Emission Spectra;
- Stellar Spectra;
- Ultraviolet Radiation;
- Infrared Radiation;
- Iue;
- Kinematics;
- Ratios;
- Stellar Mass Ejection;
- Time Dependence;
- Line Profiles:Peculiar Stars;
- Peculiar Stars:Ejecta;
- Peculiar Stars:Line Profiles;
- Peculiar Stars:UV Spectra;
- UV Spectra:Peculiar Stars