One of the challenges in star formation studies is to link the intra-cloud understanding of the processes, obtained in the Milky Way, to the picture of kpc-scale relations usually studied in external galaxies.
Nearby galaxies are the ideal laboratory for this investigation since they allow the study of star formation processes on large-scale, while still being close enough to reveal the local...
The interstellar medium (ISM) is of vital importance for the lifecycle of galaxies thanks to its ability to condense and form stars, and to be regenerated by stellar evolution. Only a large and coherent dataset of all components of the ISM (dust, atomic and molecular gas, metals) can provide a definitive view of the ISM in galaxies. Thanks to a sample of ~400 DustPedia late-type galaxies, we...
We present estimates of the atomic gas mass MHI in galaxies within the APERTIF SNS survey region. To do this, we have relied on empirical gas scaling relations based on stellar mass and star-formation rate established in the Local Universe. From the inferred HI masses, we derive HI mass functions (HIMFs), and find reasonable agreement with HIMFs derived observationally. The comparison with...
I will present the high-resolution 1.5-GHz radio observations of 280
nearby galaxies with the eMERLIN array, part of the LeMMINGs survey.
The sample consists of active and non-active galaxies, taken from
the Palomar sample. The radio images reveal a broad variety of
morphologies: one/two-sided jets, double-lobed jets, complex
structures and star formation regions on a typical...
Low excitation radio galaxies (LERGs) are a class of AGN accreting gas at low rates (<< 1% of the Eddington limit) and producing almost entirely kinetic (i.e. jet-induced) feedback. LERGs are, by number, the dominant radio galaxy population in the local Universe, preferentially hosted by massive nearby early-type galaxies (ETGs). Despite their prevalence, the powering mechanisms of these...
The SKA precursors and pathfinders (e.g. MeerKAT, ASKAP) opened a new era of investigation of neutral atomic (HI) gas studies in nearby galaxies. The possibility of reaching high spatial ($\sim 10-30$’’) and spectral resolution ($\sim ~4 - 20$ km s$^{-1}$) with short ($\sim 10$ hrs) observations, combined with a large field of view ($\sim 1^\circ$), now enables us to investigate the presence...
The HI emission line at 21 cm is arguably the best tool to trace the internal dynamics of galaxies and was indeed pivotal to establish the dark matter problem. The HI emission typically traces rotating gas disks that extend further out than the stellar component of galaxies, so one can measure extended rotation curves out to large radii, where the dark matter effect becomes predominant....
