Details

Autor(en) / Beteiligte

• De Paolis, F
• Ingrosso, G
• Nucita, A A
• Vetrugno, D
• Gurzadyan, V G
• Kashin, A L
• Khachatryan, H G
• Mirzoyan, S
• Jetzer, Ph
• Qadir, A

Titel

CMB as a possible new tool to study the dark baryons in galaxies

Ist Teil von

• Journal of physics. Conference series, 2012-01, Vol.354 (1), p.12004-8

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2012

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Baryons constitute about 4% of our universe, but most of them are missing and we do not know where and in what form they are hidden. This constitute the so-called missing baryon problem. A possibility is that part of these baryons are hidden in galactic halos. We show how the 7-year data obtained by the WMAP satellite may be used to trace the halo of the nearby giant spiral galaxy M31. We detect a temperature asymmetry in the M31 halo along the rotation direction up to about 120 kpc. This could be the first detection of a galactic halo in microwaves and may open a new way to probe hidden baryons in these relatively less studied galactic objects using high accuracy CMB measurements.