Planck view of the M82 galaxy

Authors :: Gurzadyan, V. G.
De Paolis, F.
Nucita, A. A.
Ingrosso, G.
Kashin, A. L.
Khachatryan, H. G.
Sargsyan, S.
Yegorian, G.
Jetzer, Ph.
Qadir, A.
Vetrugno, D.
Source :: A&A 582, A77 (2015)
Publication Year :: 2015
Abstract: Planck data towards the galaxy M82 are analyzed in the 70, 100 and 143 GHz bands. A substantial north-south and East-West temperature asymmetry is found, extending up to 1 degree from the galactic center. Being almost frequency-independent, these temperature asymmetries are indicative of a Doppler-induced effect regarding the line-of-sight dynamics on the halo scale, the ejections from the galactic center and, possibly, even the tidal interaction with M81 galaxy. The temperature asymmetry thus acts as a model-independent tool to reveal the bulk dynamics in nearby edge-on spiral galaxies, like the Sunyaev-Zeldovich effect for clusters of galaxies.<br />Comment: 4 pages, 3 figures, in press on A&A