Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...183..287r&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 183, no. 2, Sept. 1987, p. 287-294.
Astronomy and Astrophysics
Astrophysics
6
Early Stars, Emission Spectra, Spectral Energy Distribution, Spectral Line Width, Stellar Envelopes, Ultraviolet Spectra, Balmer Series, H Alpha Line, Iue, Planetary Nebulae, Spectrum Analysis, Stellar Spectrophotometry
Scientific paper
A description is presented of the spectral features that characterize the spectrum of HD 190073 both in the photographic region from about 3600 Å to about 6600 Å, and in the IUE ultraviolet, from about 1150 to about 3200 Å. A number of different types of profiles can be distinguished and this seems to imply that many different "broad" regions of line formation coexist in the extended envelope of the star, including regions with densities differing in several orders of magnitude. A very interesting feature in the spectrum of HD 190073 is the presence of relatively narrow emissions at 3685 Å, 3760 Å and at Hα which suggests a similarity between a compact planetary nebula - NGC 7027 - and this A star with infrared excess.
Cidale Lydia
Ringuelet Adela E.
Rovira Marta
Sahade Jorge
No associations
LandOfFree
Different regions of line formation in the envelope of the early emission line star HD 190073 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 Different regions of line formation in the envelope of the early emission line star HD 190073, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Different regions of line formation in the envelope of the early emission line star HD 190073 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1668036