Advanced

The Gaia-ESO Survey: Tracing interstellar extinction

Schultheis, M.; Kordopatis, G.; Recio-Blanco, A.; de Leverny, P.; Hill, V.; Gilmore, G.; Alfaro, E. J.; Costado, M. T.; Bensby, Thomas LU and Damiani, F., et al. (2015) In Astronomy & Astrophysics 577.
Abstract
Context. Large spectroscopic surveys have in recent years enabled computing three-dimensional interstellar extinction maps thanks to the accurate stellar atmospheric parameters and line-of-sight distances these surveys provide. Interstellar extinction maps are complementary to 3D maps extracted from photometry and allow a more thorough studying of the dust properties. Aims. Our goal is to use the high-resolution spectroscopic survey Gaia-ESO to obtain with a good distance resolution the interstellar extinction and its dependency as a function of the environment and the Galactocentric position. Methods. We used the stellar atmospheric parameters of more than 5000 stars, obtained from the Gaia-ESO survey second internal data release, and... (More)
Context. Large spectroscopic surveys have in recent years enabled computing three-dimensional interstellar extinction maps thanks to the accurate stellar atmospheric parameters and line-of-sight distances these surveys provide. Interstellar extinction maps are complementary to 3D maps extracted from photometry and allow a more thorough studying of the dust properties. Aims. Our goal is to use the high-resolution spectroscopic survey Gaia-ESO to obtain with a good distance resolution the interstellar extinction and its dependency as a function of the environment and the Galactocentric position. Methods. We used the stellar atmospheric parameters of more than 5000 stars, obtained from the Gaia-ESO survey second internal data release, and combined them with optical (SDSS) and near-infrared (VISTA) photometry as well as different sets of theoretical stellar isochrones to calculate line-of-sight extinction and distances. The extinction coefficients were then compared with the literature to discuss their dependency on the stellar parameters and position in the Galaxy. Results. Within the errors of our method, our work does not show any dependence of the interstellar extinction coefficient on the stellar atmospheric parameters. We find no evidence of a variation of E(J - H) = E(J - K) with the angle from the Galactic centre or with Galactocentric distance. This suggests that we are dealing with a uniform extinction law in the SDSS ugriz bands and the near-IR JHKs bands. Therefore, extinction maps built from mean colour-excesses that assume a constant extinction coefficient can be used without introducing any systematic errors. (Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Galaxy: structure, extinction, dust, Galaxy: stellar content
in
Astronomy & Astrophysics
volume
577
publisher
EDP Sciences
external identifiers
  • wos:000357345900029
  • scopus:84930508364
ISSN
0004-6361
DOI
10.1051/0004-6361/201425333
language
English
LU publication?
yes
id
761f43ab-7f97-4c68-baf0-963ec2c3aa48 (old id 7790434)
date added to LUP
2015-09-04 10:32:16
date last changed
2017-11-05 04:16:56
@article{761f43ab-7f97-4c68-baf0-963ec2c3aa48,
  abstract     = {Context. Large spectroscopic surveys have in recent years enabled computing three-dimensional interstellar extinction maps thanks to the accurate stellar atmospheric parameters and line-of-sight distances these surveys provide. Interstellar extinction maps are complementary to 3D maps extracted from photometry and allow a more thorough studying of the dust properties. Aims. Our goal is to use the high-resolution spectroscopic survey Gaia-ESO to obtain with a good distance resolution the interstellar extinction and its dependency as a function of the environment and the Galactocentric position. Methods. We used the stellar atmospheric parameters of more than 5000 stars, obtained from the Gaia-ESO survey second internal data release, and combined them with optical (SDSS) and near-infrared (VISTA) photometry as well as different sets of theoretical stellar isochrones to calculate line-of-sight extinction and distances. The extinction coefficients were then compared with the literature to discuss their dependency on the stellar parameters and position in the Galaxy. Results. Within the errors of our method, our work does not show any dependence of the interstellar extinction coefficient on the stellar atmospheric parameters. We find no evidence of a variation of E(J - H) = E(J - K) with the angle from the Galactic centre or with Galactocentric distance. This suggests that we are dealing with a uniform extinction law in the SDSS ugriz bands and the near-IR JHKs bands. Therefore, extinction maps built from mean colour-excesses that assume a constant extinction coefficient can be used without introducing any systematic errors.},
  articleno    = {A77},
  author       = {Schultheis, M. and Kordopatis, G. and Recio-Blanco, A. and de Leverny, P. and Hill, V. and Gilmore, G. and Alfaro, E. J. and Costado, M. T. and Bensby, Thomas and Damiani, F. and Feltzing, Sofia and Flaccomio, E. and Lardo, C. and Jofre, P. and Prisinzano, L. and Zaggia, S. and Jimenez-Esteban, F. and Morbidelli, L. and Lanzafame, A. C. and Hourihane, A. and Worley, C. and Francois, P.},
  issn         = {0004-6361},
  keyword      = {Galaxy: structure,extinction,dust,Galaxy: stellar content},
  language     = {eng},
  publisher    = {EDP Sciences},
  series       = {Astronomy & Astrophysics},
  title        = {The Gaia-ESO Survey: Tracing interstellar extinction},
  url          = {http://dx.doi.org/10.1051/0004-6361/201425333},
  volume       = {577},
  year         = {2015},
}