Triangulum galaxy viewed by Planck

Abstract

We used Planck data to study the M33 galaxy and find a substantial temperature asymmetry with respect to its minor axis projected onto the sky plane. This temperature asymmetry correlates well with the HI velocity field at 21 cm, at least within a galactocentric distance of 0.5 degree, and it is found to extend up to about 3 degrees from the galaxy center. We conclude that the revealed effect, that is, the temperature asymmetry and its extension, implies that we detected the differential rotation of the M33 galaxy and of its extended baryonic halo.

8 pages, 8 figures, in press on Astronomy and Astrophysics, main journal

References in corpus (9)

• Separation of anomalous and synchrotron emissions using WMAP polarization data
• Dynamical signatures of a LCDM-halo and the distribution of the baryons in M33
• The building up of the disk galaxy M33 and the evolution of the metallicity gradient
• HI clouds in the proximity of M33
• Formation of a giant HI bridge between M31 and M33 from their tidal interaction
• Bar imprints on the inner gas kinematics of M33
• The Stellar Populations of M33's Outer Regions II: Deep ACS Imaging
• Planck's confirmation of the M31 disk and halo rotation
• Unearthing Foundations of a Cosmic Cathedral: Searching the Stars for M33's Halo