Automated Extraction of DIBs from Cool Star Spectra

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 m...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2013-05, Vol.9 (S297), p.110-112
Main Authors: Chen, H.-Ch, Lallement, R., Puspitarini, L., Bonifacio, P., Babusiaux, C., Hill, V.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics
Contributed Papers
Stars & galaxies
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Summary: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.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921313015688