The near-IR NA I doublet and CA II triplet in late-type stars and the determination of stellar atmosphere parameters

Details The near-IR NA I doublet and CA II triplet in late-type stars and the determination of stellar atmosphere parameters The near-IR NA I doublet and CA II triplet in late-type stars and the determination of stellar atmosphere parameters

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...248..367z&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 248, no. 2, Aug. 1991, p. 367-388. Research supported by Ministere des Affaire

Astronomy and Astrophysics

Astrophysics

51

Giant Stars, Late Stars, Metallicity, Spectral Line Width, Stellar Atmospheres, Stellar Spectra, Calcium, Charge Coupled Devices, Near Infrared Radiation, Sodium, Stellar Composition, Stellar Gravitation, Stellar Spectrophotometry

Scientific paper

CCD spectroscopic observations in the near-IR (7990-8680 A) for a sample of 144 late type stars are presented. The dependence of the Na I doublet (8183 and 8194 A) and the Ca II triplet (8498, 8542 and 8662 A) on stellar atmospheric parameters is investigated. It is confirmed in stars of spectral types later than G0 a dependence of line strength on effective temperature, surface gravity, and metallicity in good agreement with previous studies. However, the present sample contains many more very late type stars than previous studies, and these stars show a strong dependence of Ca-II triplet strength on temperature. These lines, together with the (R - I) color index which is known to be a good temperature indicator, were used to estimate the metal abundance and the surface gravity of the present program stars.

Affiliated with

Also associated with

No associations

Rating

The near-IR NA I doublet and CA II triplet in late-type stars and the determination of stellar atmosphere parameters 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 near-IR NA I doublet and CA II triplet in late-type stars and the determination of stellar atmosphere parameters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The near-IR NA I doublet and CA II triplet in late-type stars and the determination of stellar atmosphere parameters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1724376