ORFEUS-SPAS II EUV Spectroscopy of epsilon Canis Majoris (B2 II)
Astrophysics
2009-09-25 v2
Abstract
We report on extreme-ultraviolet (EUV) spectroscopic observations of the B bright giant epsilon Canis Majoris made during the ORFEUS-SPAS II mission. We assess the performance of the instrument in the EUV and find that the effective area is roughly 3 times that of the Extreme-Ultraviolet Explorer (EUVE) long-wavelength spectrometer and that the spectral resolution is lambda/Delta(lambda) = 1250. We identify most of the features, qualitatively compare different models, and examine the wind-broadened O V and Si IV lines, which display blue edge velocities up to 800 km/s.
Cite
@article{arxiv.astro-ph/9712093,
title = {ORFEUS-SPAS II EUV Spectroscopy of epsilon Canis Majoris (B2 II)},
author = {David H. Cohen and Mark Hurwitz and Joseph P. Cassinelli and Stuart Bowyer},
journal= {arXiv preprint arXiv:astro-ph/9712093},
year = {2009}
}
Comments
10 pages LaTeX, 5 figures, accepted by ApJ Letters, replacement includes just a few editorial changes