Precise temperatures of classical Cepheids and yellow supergiants from line-depth ratios

Authors
Kovtyukh, VV Gorlova, NI
Citation
Vv. Kovtyukh et Ni. Gorlova, Precise temperatures of classical Cepheids and yellow supergiants from line-depth ratios, ASTRON ASTR, 358(2), 2000, pp. 587-592
Citations number
21
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
00046361 → ACNP
Volume
358
Issue
2
Year of publication
2000
Pages
587 - 592
Database
ISI
SICI code
0004-6361(200006)358:2<587:PTOCCA>2.0.ZU;2-8
Abstract
The ratios of spectral line-depths are powerful indicators of the effective temperature. Thirty-two functional formulas to estimate the effective temp eratures from line-depth ratios for Cepheids and F-G supergiants are offere d. For high-quality spectra we find errors in the temperature as small as 1 0-15 K. These calibrations are only little sensitive to other stellar param eters and allow to derive highly precise T-eff for supergiants in the range 4700-6700 K.