Seeing the halo rotation of nearby spiral galaxies using Planck data

Abstract

The rotation of the galactic halos is a fascinating topic which is still waiting to be addressed. Planck data has shown the existence of a temperature asymmetry towards the halo of several nearby galaxies, such as M31, NGC 5128, M33, M81, and M82. However, the cause of this asymmetry is an open problem. A possibility to explain the observed effect relies on the presence of "cold gas clouds" populating the galactic halos, which may be the answer to the so-called missing baryon problem. Here, we present a technique to estimate an upper limit to the rotational velocity of the halo of some nearby spiral galaxies by using both their dynamical masses and the Planck data.

References in corpus (3)

• Planck's confirmation of the M31 disk and halo rotation
• Triangulum galaxy viewed by Planck
• On the nature of the z=0 X-ray absorbers: I. Clues from an external group

Cited by in corpus (4)

• Virial clouds explaining the observed rotational asymmetry in the galactic halos
• The rotational kinetic Sunyaev-Zeldovich contribution to the temperature asymmetry toward the M31 halo
• On the Galactic Halos Rotation by Planck Data
• Evolution of virial clouds-I: from surface of last scattering up to the formation of population-III stars