Abundance Determinations and a Hot Zone Model for the Interacting Binary, V356 SGR

Details Abundance Determinations and a Hot Zone Model for the Interacting Binary, V356 SGR Abundance Determinations and a Hot Zone Model for the Interacting Binary, V356 SGR

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...19410509r&link_type=abstract

American Astronomical Society Meeting 194, #105.09

Other

Scientific paper

The eclipsing, interacting binary system, V356 Sgr, provides a rare opportunity to directly examine the exposed core of a star for the signatures of nuclear processing. This Algol-type system is composed of a Roche-lobe filling A2II star which is nearing the end of a long-term mass transfer to its B3V companion. We report new determinations of carbon and nitrogen abundances in each stellar component derived from IUE high dispersion spectra. Differential abundances derived from comparison stars of similar temperatures suggest that both surfaces are contaminated with CN-cycled material. In a previous report (Fraser et al, 1998) on new mass determinations for this system, we noted anomalies in our velocity curve for the B star. We have had some success in explaining these anomalies by proposing an equatorial hot zone where the mass transfer stream hits the B star. The hot zone creates the anomalies by emphasizing the B star spin velocity (roughly 7 times larger than the orbital velocity) as it comes in and out of view. Since the relative brightness of the hot zone changes with wavelength, we are measuring new velocities at different wavelengths to see if the anomalies are wavelength dependent . We are also checking other temperature indicators vs. orbital phase for additional confirmation of the hot zone. This project is supported by a NASA JOVE grant to SUNY Oswego.

Affiliated with

Also associated with

No associations

Rating

Abundance Determinations and a Hot Zone Model for the Interacting Binary, V356 SGR does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Abundance Determinations and a Hot Zone Model for the Interacting Binary, V356 SGR, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Abundance Determinations and a Hot Zone Model for the Interacting Binary, V356 SGR will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1767133