Dario Fadda

Star formation and black hole accretion activity in rich local clusters of galaxies

We present a study of the star formation and central black hole accretion activity of the galaxies hosted in the two nearby (z

Galaxy evolution in the cluster Abell 85: new insights from the dwarf population

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Transient effects in Herschel/PACS spectroscopy

0.2) rich galaxy clusters Abell 983 and 1731. Aims: We are able to quantify both the obscured and unobscured star formation rates, as well as the presence of active galactic nuclei (AGN) as a function of the environment in which the galaxy is located. Methods: We targeted the clusters with unprecedented deep infrared Spitzer observations (0.2 mJy @ 24 micron), near-IR Palomar imaging and optical WIYN spectroscopy. The extent of our observations (

Using all of your CPU's in HIPE

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Correcting Transients in Unchopped PACS/Herschel Spectroscopy

3 virial radii) covers the vast range of possible environments, from the very dense cluster centre to the very rarefied cluster outskirts and accretion regions. Results: The star forming members of the two clusters present star formation rates comparable with those measured in coeval field galaxies. The analysis of the spatial arrangement of the spectroscopically confirmed members reveals an elongated distribution for A1731 with respect to the more uniform distribution of A983. The emerging picture is compatible with A983 being a fully evolved cluster, in contrast with the still actively accreting A1731. Conclusions: The analysis of the specific star formation rate reveals evidence of on-going galaxy pre-processing along A1731s filament-like structure. Furthermore, the decrease in the number of star forming galaxies and AGN towards the cluster cores suggests that the cluster environment is accelerating the ageing process of galaxies and blocking further accretion of the cold gas that fuels both star formation and black hole accretion activity.

Transient Correction for PACS/Herschel Unchopped Spectroscopy

We present the first results of a new spectroscopic survey of the cluster Abell 85 targeting 1466 candidate cluster members within the central

Close Pairs of Galaxies at z<= 1.5: Mid-Infrared Properties in the Spitzer First Look Survey

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Shocked Baryons and Star Formation in a High-Redshift Protocluster

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The IR Properties of Interacting and Merging Galaxies to z = 1.3

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An atlas of mid-infrared spectra of high-redshift galaxies in the Spitzer First Look Survey.

of the cluster and having magnitudes