Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...138..140d&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 138, no. 1, Sept. 1984, p. 140-160. Sponsorship: Deutsche Forschungsgemeinscha
Astronomy and Astrophysics
Astronomy
22
Astronomical Spectroscopy, B Stars, Stellar Envelopes, Stellar Spectra, Ultraviolet Astronomy, Variable Stars, Absorption Spectra, Balmer Series, Emission Spectra, Stellar Atmospheres, Stellar Models
Scientific paper
A spectroscopic/photometric survey was performed on the Be star HR 5223 to characterize physical conditions in high- and low-velocity regions and the source regions of observed stellar winds and Balmer line-emitting envelopes of Be stars. Data were gathered from 1978-82 at La Silla and with the IUE spacecraft, and comprised UBV, IR, and UV photometry and coude, Balmer line H-alpha, -beta, and -gamma line and UV spectroscopy. The fast rotating object was viewed pole-on and exhibited a dense, about 10,000 K, disk-shaped envelope centered around the equator and identified as the source of the hydrogen emission lines. Fe II emissions were confined to compact areas of the envelope. Superionization above the pole was indicated by the presence of N V, S IV, and C IV lines, which are also features of a hot stellar wind with a velocity of at least 500 km/sec. The stellar wind might feed the cool disk, which forms from energy dissipation and angular momentum transport in the envelope during self-accretion.
Dachs Joachim
Hanuschik Reinhard
No associations
LandOfFree
A study of the expanding envelope around the pole-on Be star HR 5223 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 A study of the expanding envelope around the pole-on Be star HR 5223, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A study of the expanding envelope around the pole-on Be star HR 5223 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1389393