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Title: 3D distribution of interstellar medium in the Galaxy: Preparation for analysis of Gaia observations

Abstract

Accurate and detailed three-dimensional (3D) maps of Galactic interstellar medium (ISM) are still lacking. One way to obtain such 3D descriptions is to record a large set of individual absorption or reddening measurements toward target stars located at various known distances and directions. The inversion of these measurements using a tomographic method can produce spatial distribution of the ISM. Until recently absorption data were very limited and distances to the target stars are still uncertain, but the situation will greatly improve thanks to current and future massive stellar surveys from ground, and to Gaia mission. To prepare absorption data for inversion from a huge number of stellar spectra, automated tools are needed. We have developed various spectral analysis tools adapted to different type of spectra, early- or late- type star. We also have used diffuse interstellar bands (DIBs) to trace IS structures and kinematics. Although we do not know yet their carriers, they can be a promising tool to trace distant interstellar clouds or Galactic arms. We present some examples of the interstellar fitting and show the potentiality of DIBs in tracing the ISM. We will also briefly show and comment the latest 3D map of the local ISM whichmore » reveal nearby cloud complexes and cavities.« less

Authors:
 [1];  [1]
  1. GEPI Observatoire de Paris, CNRS, Paris Diderot University, 5 Place Jules Janssen, 92190, Meudon (France)
Publication Date:
OSTI Identifier:
22488917
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1677; Journal Issue: 1; Conference: 5. international conference on mathematics and natural sciences, Bandung (Indonesia), 2-3 Nov 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABSORPTION; CLOUDS; EMISSION SPECTRA; INTERSTELLAR GRAINS; INTERSTELLAR SPACE; MILKY WAY; SPATIAL DISTRIBUTION; STARS

Citation Formats

Puspitarini, Lucky, Bosscha Observatory and Department of Astronomy, FMIPA, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, and Lallement, Rosine. 3D distribution of interstellar medium in the Galaxy: Preparation for analysis of Gaia observations. United States: N. p., 2015. Web. doi:10.1063/1.4930678.
Puspitarini, Lucky, Bosscha Observatory and Department of Astronomy, FMIPA, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, & Lallement, Rosine. 3D distribution of interstellar medium in the Galaxy: Preparation for analysis of Gaia observations. United States. https://doi.org/10.1063/1.4930678
Puspitarini, Lucky, Bosscha Observatory and Department of Astronomy, FMIPA, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, and Lallement, Rosine. 2015. "3D distribution of interstellar medium in the Galaxy: Preparation for analysis of Gaia observations". United States. https://doi.org/10.1063/1.4930678.
@article{osti_22488917,
title = {3D distribution of interstellar medium in the Galaxy: Preparation for analysis of Gaia observations},
author = {Puspitarini, Lucky and Bosscha Observatory and Department of Astronomy, FMIPA, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132 and Lallement, Rosine},
abstractNote = {Accurate and detailed three-dimensional (3D) maps of Galactic interstellar medium (ISM) are still lacking. One way to obtain such 3D descriptions is to record a large set of individual absorption or reddening measurements toward target stars located at various known distances and directions. The inversion of these measurements using a tomographic method can produce spatial distribution of the ISM. Until recently absorption data were very limited and distances to the target stars are still uncertain, but the situation will greatly improve thanks to current and future massive stellar surveys from ground, and to Gaia mission. To prepare absorption data for inversion from a huge number of stellar spectra, automated tools are needed. We have developed various spectral analysis tools adapted to different type of spectra, early- or late- type star. We also have used diffuse interstellar bands (DIBs) to trace IS structures and kinematics. Although we do not know yet their carriers, they can be a promising tool to trace distant interstellar clouds or Galactic arms. We present some examples of the interstellar fitting and show the potentiality of DIBs in tracing the ISM. We will also briefly show and comment the latest 3D map of the local ISM which reveal nearby cloud complexes and cavities.},
doi = {10.1063/1.4930678},
url = {https://www.osti.gov/biblio/22488917}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1677,
place = {United States},
year = {Wed Sep 30 00:00:00 EDT 2015},
month = {Wed Sep 30 00:00:00 EDT 2015}
}