Morphology and variability of helium line profiles in the P Cygni spectrum

Details Morphology and variability of helium line profiles in the P Cygni spectrum Morphology and variability of helium line profiles in the P Cygni spectrum

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.201...61m&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 201, no. 1, p. 61-70.

Astronomy and Astrophysics

Astrophysics

5

Helium, Line Shape, Line Spectra, Peculiar Stars, Stellar Spectra, Curve Fitting, Variability, Visible Spectrum

Scientific paper

Results are presented on a three-year study of the morphology and variability of 13 helium lines in the P Cygni optical spectrum. It was found that most lines in the P Cygni spectrum show profiles with a complicated structure: discrete components (with the most probable values for the velocity ranging from -140 to -180 km/s and from -200 to -220 km/s), which are superposed on a broader 'underlying' P Cygni profile. The central velocity of the helium discrete components is nearly the same for all lines in a given spectrum (sigma(v) = +/- 4 km/s). However, this velocity varies with time; the variations are qualitatively similar to those observed in other ions in the spectrum, e.g., HI (Markova, 1986, 1990), O II, Si III, and N II (Markova and Kolka, 1988), and Fe III (Lamers et al., 1985).

Affiliated with

Also associated with

No associations

Rating

Morphology and variability of helium line profiles in the P Cygni spectrum 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 Morphology and variability of helium line profiles in the P Cygni spectrum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Morphology and variability of helium line profiles in the P Cygni spectrum will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1441713