Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...112..174k&link_type=abstract
Astronomy and Astrophysics, vol. 112, no. 1, Aug. 1982, p. 174-177. Deutsche Forschungsgemeinschaft
Astronomy and Astrophysics
Astrophysics
12
B Stars, Balmer Series, Emission Spectra, Herbig-Haro Objects, Stellar Envelopes, Stellar Spectrophotometry, Absorption Spectra, H Alpha Line, H Beta Line, H Gamma Line, Main Sequence Stars, Radiant Flux Density, Spectral Line Width, Stellar Evolution, Variable Stars
Scientific paper
Recent observational material on the Balmer emission lines of the Herbig Be star HD 200775 is reviewed. Rectifying the interchange of the H-alpha profiles observed by Garrison and Anderson (1977) in HD 200775 and BD + 61 deg 154, no time variations are found of the profile shape or the strength of H-alpha. The profiles of H-alpha, H-beta, H-gamma, and H-delta are symmetrical with central absorption dips in H-alpha and H-beta. Numerical calculations of the level populations of hydrogen have been done to explain the observed line ratios H-alpha/H-beta, H-gamma/H-beta, and H-delta/H-beta. It is concluded that the Balmer emission lines are produced in a compact (characteristic size, 1000 solar radii) and fairly dense (10 to the 9th per cu cm) envelope.
Beltrametti M.
Finkenzeller Ulrich
Koeppen Joachim
Mundt Reinhard
No associations
LandOfFree
On the Balmer emission lines of the Herbig Be star HD 200775 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 On the Balmer emission lines of the Herbig Be star HD 200775, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Balmer emission lines of the Herbig Be star HD 200775 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-899215