The surface brightness of the Galaxy at the Solar Neighbourhood

Abstract

We present a new determination of the surface brightness of our Galaxy at the Solar Neighbourhood as observed from outside the Galaxy. We rely on various existing optical and infra-red surveys to obtain a multiwavelength estimate. On the one hand, scattered light does not contribute significantly to the surface brightness. On the other hand, optical and infrared integrated all-sky surveys (Pioneer 10/11 and COBE/DIRBE) show a systematically larger value than our synthetic local estimate based on Hipparcos data. This local estimate is also compatible with our Galactic simulations normalised at the Solar Neighbourhood and assuming an homogeneous stellar distribution. We interpret this disagreement as a signature of the presence of a local minimum of the stellar density compatible with Gould's belt. According to this result, the global luminosity of the Milky Way should follow the Tully-Fisher relation established for external galaxies.

arXiv comment27 pages (including 13 pages of appendices), 45 figures; accepted for publication in Astronomy and Astrophysics

References in corpus (10)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• Correcting for the Effects of Interstellar Extinction
• The USNO-B Catalog
• A Hipparcos census of the nearby OB associations
• The COBE Diffuse Infrared Background Experiment Search for the Cosmic Infrared Background: II. Model of the Interplanetary Dust Cloud
• A three-dimensional Galactic extinction model
• On the mass-to-light ratio of the local Galactic disc and the optical luminosity of the Galaxy
• Semi-analytic modelling of galaxy evolution in the IR/submm range
• The COBE Diffuse Infrared Background Experiment Search for the Cosmic Infrared Background: III. Separation of Galactic Emission from the Infrared Sky Brightness
• Detection of Extended Red Emisson in the Diffuse Interstellar Medium

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