Cosmic rays, gas and dust in nearby anticentre clouds

Author： Remy Q. Grenier I. A. Marshall D. J. Casandjian J. M.

E-ISSN： 1432-0746|601|issue|A78-A78

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.601, Iss.issue, 2017-05, pp. : A78-A78

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Abstract

Aims. We aim to explore the capabilities of dust emission and γ rays for probing the properties of the interstellar medium in the nearby anti-centre region, using γ-ray observations with the Fermi Large Area Telescope (LAT), and the thermal dust optical depth inferred from Planck and IRAS observations. We also aim to study massive star-forming clouds including the well known Taurus, Auriga, Perseus, and California molecular clouds, as well as a more diffuse structure which we refer to as Cetus. In particular, we aim at quantifying potential variations in cosmic-ray density and dust properties per gas nucleon across the different gas phases and different clouds, and at measuring the CO-to-H₂ conversion factor, X_CO, in different environments.