Pubblicazioni

Sono presenti le pubblicazioni avvenute grazie al lavoro professionale o amatoriale dei soci ARA.

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X-ray luminosity functions of different morphological and X-ray type AGN populations

Scritto il 01 Mar 2013 alle 01:39 in Pubblicazioni

Luminosity functions are one of the most important observational clues
when studying galaxy evolution over cosmic time. In this paper we
present the X-ray luminosity functions of X-ray detected AGN in the SXDS
and GWS fields. The limiting fluxes of our samples are 9.0×10^(-15) and
4.8×10^(-16) erg/cm^2/sec^(-1) in the 0.5 – 7.0 keV band in the two
fields, respectively. We carried out analysis in three X-ray bands and
in two redshift intervals up to z < 1.4. Moreover, we derive the
luminosity functions for different optical morphologies and X-ray types.
We confirm strong luminosity…

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Life after eruption - II. The eclipsing old nova V728 Scorpii

Scritto il 26 Feb 2013 alle 01:39 in Pubblicazioni

The old nova V728 Sco has been recently recovered via photometric and
spectroscopic observations, 150 years after the nova eruption. The
spectral properties pointed to a high-inclination system with a
comparatively low mass-transfer rate. In this paper we show that the
object is an eclipsing system with an orbital period of 3.32 h. It has
enhanced long-term variability that can be interpreted as 'stunted'
dwarf-nova-type outbursts. Using the ingress and egress times of the
eclipsed components we calculate the radius of the central object. The
latter turns out to be significantly larger than…

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Lyman break and UV-selected galaxies at $z \sim 1$ I. Stellar populations from ALHAMBRA survey

Scritto il 13 Feb 2013 alle 01:39 in Pubblicazioni

We take advantage of the exceptional photometric coverage provided by
the combination of GALEX data in the UV and the ALHAMBRA survey in the
optical and near-IR to analyze the physical properties of a sample of
1225 GALEX-selected Lyman break galaxies (LBGs) at $0.8 \lesssim z
\lesssim 1.2$ located in the COSMOS field. This is the largest sample of
LBGs studied at that redshift range so far. According to a spectral
energy distribution fitting with synthetic stellar population templates,
we find that LBGs at $z \sim 1$ are mostly young galaxies with a median
value of 341 Myr and have…

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