Thesis Topic: The physics of a nearby galaxy sample (HRS): gas, dust and stellar population and their relationship
Thesis Supervisor: Paola Andreani
External supervisors: Alessandro Boselli (LAM, Marseille), Luigi Spinoglio (INAF-IAPS, Rome)
Abstract
The HRS is a volume-limited sample (i.e., 15<D<25 Mpc) including late-type galaxies (Sa and later) and early-type galaxies (S0a and earlier) selected from the 2MASS sample at high Galactic latitude and low Galactic extinction. The HRS was targeted as part of the Herschel/SPIRE guaranteed time and extensively studied at all wavelengths. A variety of data together with morphological information and distances have been accurately estimated.
Our group has accumulated a huge amount of multi-frequency data for this sample: SDSS imaging, UV GALEX, narrow band imaging HЮБ HI and CO, WISE photometry, radio continuum, which can be deeply exploited to extract statistical meaningful information about the physical characteristics of nearby galaxies. The ultimate goal would be to create a solid template for comparison with larger redshift galaxy samples.
The aim is to exploit the wide coverage of electromagnetic spectrum to probe the relationship between the warm dust (mid and far-IR), cold dust (submm) and the atomic (21cm line) and molecular (CO 2.6mm line) gas components, with the different stellar populations (UV to near-IR spectral range), and with the electrons in magnetic field (radio continuum) to help addressing the issues of how primordial galaxies transform their huge gas reservoir into stars.