3D tomography of local interstellar gas and dust

Séverine Raimond (1) , Rosine Lallement (1) , Jean-Luc Vergely (2)

1 HELIOS - LATMOS
2 ACRI-ST - Analytic and Computational Research, Inc. - Earth Sciences

Interstellar absorption data and Strömgren photometric data for target stars possessing a Hipparcos parallax have been combined to build a 3D tomography of local gas and dust. We show the latest inverted 3D distributions within 250 pc, compare gas and dust maps and discuss the present limitations and work in progress. Gaia extinction data and follow-up ground-based stellar spectra (e.g. with GYES at the CFHT) will provide a far larger database that should allow a 3D tomography of much higher quality and extended to much larger distances.

Domaines: Astrophysique stellaire et solaire [astro-ph.SR]; Astrophysique stellaire et solaire [astro-ph.SR]

Séverine Raimond, Rosine Lallement, Jean-Luc Vergely. 3D tomography of local interstellar gas and dust. SF2A-2010: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics, Jun 2010, Marseille, France. pp.45-49. ⟨hal-00550512⟩