High resolution observations of interstellar NA I and CA II towards the Scorpio-Centaurus association

Details High resolution observations of interstellar NA I and CA II towards the Scorpio-Centaurus association High resolution observations of interstellar NA I and CA II towards the Scorpio-Centaurus association

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...247..183c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 247, no. 1, July 1991, p. 183-201.

Astronomy and Astrophysics

Astrophysics

63

B Stars, Interstellar Matter, Stellar Spectra, Absorption Spectra, Atmospheric Models, Calcium, Graphs (Charts), Line Spectra, Sodium, Solar Neighborhood, Stellar Atmospheres, Stellar Models, Stellar Spectrophotometry

Scientific paper

High-resolution observations (3.6 km/s FWHM) of interstellar Na I and Ca II toward 28 stars in the direction of the Sco-Cen association are presented. The observed velocity structure, velocity dispersions, column densities and Na I/Ca II ratios are discussed. Of the 58 identified velocity components (toward 23 stars), 46 (or 79 percent) were found to have negative LSR velocities. This is in agreement with previous results, and indicates a general outflow from the Sco-Cen association. By fitting an expanding shell model to the observed velocities an expansion velocity of 7 km/s was obtained. If the further assumption is made that only one component per star arises in such a shell, the best-fitting expansion velocity was found to be 9 km/s. In the latter case, the remaining components were variously identified (depending on their velocities and Na I/Ca II ratios).

Affiliated with

Also associated with

No associations

Rating

High resolution observations of interstellar NA I and CA II towards the Scorpio-Centaurus association 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 High resolution observations of interstellar NA I and CA II towards the Scorpio-Centaurus association, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High resolution observations of interstellar NA I and CA II towards the Scorpio-Centaurus association will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-859795