Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:1209.0342)
· On-line Data
· References in the article
· Citations to the Article (8) (Citation History)
· Refereed Citations to the Article
· Associated Articles
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
TMCalc - a fast code to derive Teff and [Fe/H] for FGK stars
Authors:
Sousa, S. G.; Santos, N. C.; Israelian, G.
Affiliation:
AA(Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762, Porto, Portugal ; Instituto de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain), AB(Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762, Porto, Portugal; Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 4169-007, Porto, Portugal), AC(Instituto de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidade de La Laguna, 38205 La Laguna, Tenerife, Spain)
Publication:
Astronomy & Astrophysics, Volume 544, id.A122, 10 pp. (A&A Homepage)
Publication Date:
08/2012
Origin:
EDP Sciences
Astronomy Keywords:
stars: fundamental parameters, stars: abundances, stars: statistics, methods: data analysis, techniques: spectroscopic
DOI:
10.1051/0004-6361/201219260
Bibliographic Code:
2012A&A...544A.122S

Abstract

We present a new direct spectroscopic calibration for a fast estimation of the stellar metallicity [Fe/H]. This calibration was computed using a large sample of 451 solar-type stars for which we have precise spectroscopic parameters derived from high quality spectra. The new [Fe/H] calibration is based on weak Fe I lines, which are expected to be less dependent on surface gravity and microturbulence, and require only a pre-determination of the effective temperature. This temperature can be obtained using a previously presented line-ratio calibration. We also present a simple code that uses the calibrations and procedures presented in these works to obtain both the effective temperature and the [Fe/H] estimate. The code, written in C, is freely available for the community and may be used as an extension of the ARES code. We test these calibrations for 582 independent FGK stars. We show that the code can be used as a precise and fast indicator of the spectroscopic temperature and metallicity for dwarf FKG stars with effective temperatures ranging from 4500 K to 6500 K and with [Fe/H] ranging from -0.8 dex to 0.4 dex.

Based on observations collected at La Silla Observatory, ESO, Chile, with the HARPS spectrograph at the 3.6-m telescope (072.C-0488(E)).The code is available for download at http://www.astro.up.pt/~sousasag/TMCalc.

Associated Articles

Described in     Source Software    

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints