The surface gravities of AP stars - Spectroscopic estimates from H-beta profiles and comparison with photometry

Details The surface gravities of AP stars - Spectroscopic estimates from H-beta profiles and comparison with photometry The surface gravities of AP stars - Spectroscopic estimates from H-beta profiles and comparison with photometry

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26as...78..325n&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 78, no. 2, May 1989, p. 325-343. Research supported by SNSF.

Astronomy and Astrophysics

Astrophysics

28

A Stars, H Beta Line, Peculiar Stars, Stellar Evolution, Stellar Gravitation, Stellar Spectra, Stellar Spectrophotometry, Astronomical Models, Galactic Clusters, Magnetic Stars, Metallic Stars, Stellar Atmospheres, Temperature Distribution

Scientific paper

Observations of 86 Ap stars and 7 normal stars, obtained in H-beta using the IDS on the 1.5-m telescope at ESO during March-April 1985 and September 1986, are reported and analyzed. Surface gravities (log g) are determined by fitting the spectroscopic data to Kurucz stellar-atmosphere models with 10-times-solar metallicity and some He deficiency. These log g values, which depend strongly on the temperature scale, are then compared with estimates based on uvby-beta or Geneva photometry in extensive graphs. It is shown that both types of photometry give log g in good agreement with spectroscopic values for HgMn stars. For magnetic Ap stars, however, only the log g results obtained with uvby-beta photometry agree well with the spectroscopic values. No highly evolved Ap stars with log g less than 3 are found.

Affiliated with

Also associated with

No associations

Rating

The surface gravities of AP stars - Spectroscopic estimates from H-beta profiles and comparison with photometry 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 The surface gravities of AP stars - Spectroscopic estimates from H-beta profiles and comparison with photometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The surface gravities of AP stars - Spectroscopic estimates from H-beta profiles and comparison with photometry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1873950