An effective temperature calibration for solar type stars using equivalent width ratios. A fast and easy spectroscopic temperature estimation

Bibcode
2010A&A...512A..13S
DOI
10.1051/0004-6361/200913388
Sousa, S. G.; Alapini, A.; Israelian, G.; Santos, N. C.
Bibliographical reference

Astronomy and Astrophysics, Volume 512, id.A13

Advertised on:
3
2010
Journal
Astronomy and Astrophysics
Number of authors
4
IAC number of authors
2
Citations
31
Refereed citations
29
Description
Aims: Precise determination of the stellar effective temperature of solar type stars is extremely important for astrophysics. We present an effective temperature calibration for FGK dwarf stars using the line equivalent width ratios of spectral absorption lines. Methods: We used the automatic code ARES to measure the equivalent width for several spectral lines. These measurements were used for calibration with the precise effective temperature derived from spectroscopy presented in a previous work. Results: We present the effective temperature calibration for 433 line equivalent width ratios built from 171 spectral lines of different chemical elements. We also make a free code available that uses this calibration and that can be an extension to ARES for fast and automatic estimation of spectroscopic effective temperature of solar type stars. Full Table 2 and line list are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/512/A13
Related projects
Project Image
Observational Tests of the Processes of Nucleosynthesis in the Universe
Several spectroscopic analyses of stars with planets have recently been carried out. One of the most remarkable results is that planet-harbouring stars are on average more metal-rich than solar-type disc stars. Two main explanations have been suggested to link this metallicity excess with the presence of planets. The first of these, the “self
Garik
Israelian
In progress
Type
Refereed
Stellar & Interstellar Physics (FEEI)
Methods
Techniques
Solar neighborhood

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