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Automated Extraction of DIBs from Cool Star Spectra

Published online by Cambridge University Press:  21 February 2014

H.-Ch. Chen ,
R. Lallement ,
L. Puspitarini ,
P. Bonifacio ,
C. Babusiaux  and
V. Hill
H.-Ch. Chen
Affiliation:
GEPI Observatoire de Paris, CNRS, Université Paris-Diderot, Place Jules Janssen, F-92195 Meudon Cedex, France email: hui-chen.chen@obspm.fr
R. Lallement
Affiliation:
GEPI Observatoire de Paris, CNRS, Université Paris-Diderot, Place Jules Janssen, F-92195 Meudon Cedex, France email: hui-chen.chen@obspm.fr
L. Puspitarini
Affiliation:
GEPI Observatoire de Paris, CNRS, Université Paris-Diderot, Place Jules Janssen, F-92195 Meudon Cedex, France email: hui-chen.chen@obspm.fr
P. Bonifacio
Affiliation:
GEPI Observatoire de Paris, CNRS, Université Paris-Diderot, Place Jules Janssen, F-92195 Meudon Cedex, France email: hui-chen.chen@obspm.fr
C. Babusiaux
Affiliation:
GEPI Observatoire de Paris, CNRS, Université Paris-Diderot, Place Jules Janssen, F-92195 Meudon Cedex, France email: hui-chen.chen@obspm.fr
V. Hill
Affiliation:
Université de Nice Sophia Antipolis, CNRS, Observatoire de la Côte d'Azur, Laboratoire Cassiopée, B.P. 4229, 06304 Nice Cedex 4, France
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Abstract

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We have developed a method allowing to extract DIBs from cool star spectra, based on combinations of stellar synthetic, telluric transmission (when necessary), and DIB profile models. It is applicable when the star temperature, surface gravity and metallicity have been previously estimated. Such a method aims at extracting extensive data from stellar spectroscopic surveys such as the Gaia-ESO Survey in progress at the VLT. The method has been applied to several strong DIBs detected towards stars from various programs and located at various distances from the solar neighborhood to the Galactic Bulge. Here we illustrate the extraction of the 8620 Å DIB, and compare its strength to the one of the 6284 Å band, both for nearby and bulge stars.

Keywords

ISM: lines and bandsMethods: data analysis
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S297: The Diffuse Interstellar Bands , May 2013 , pp. 110 - 112
Copyright
Copyright © International Astronomical Union 2014 

References

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