NGC 1316 BVI images (Cantiello+, 2013)

Scritto il 24 Apr 2013 alle 01:40 in Pubblicazioni

This work is based on data of NGC1316 from the Very Large Telescope
(VLT). We used B, V and I-band observations obtained with the FORS1
Imager at ESO’s VLT in Paranal (Program 64.H-0624(A), P.I. M. Della
Valle).

The data reduction was carried out with the VST-Tube imaging pipeline.
VST-Tube is a very versatile software for astronomical data analysis,
tested against imaging data taken with different telescopes/detectors,
adaptable to existing or future multi-CCD cameras

(2 data files).

I misteri del tempo e la ricerca spaziale - Conferenza

Scritto il 14 Apr 2013 alle 04:10 in News

Domenica 21 Aprile alle ore 18.00 a Frasso Sabino, nella Chiesa al centro del
paese
il prof. Ignazio Ciufolini dell’Università del Salento e il prof. Antonio
Paolozzi dell’Università La Sapienza terranno una conferenza
dal titolo “I
misteri del tempo e la ricerca spaziale”.

A seguire ci sarà un concerto di
musica classica

FIR-detected Lyman break galaxies at z ~ 3: Dust attenuation and dust correction factors at high redshift

Scritto il 13 Apr 2013 alle 01:39 in Pubblicazioni

Lyman break galaxies (LBGs) represent one of the kinds of star-forming
galaxies that are found in the high-redshift universe. The detection of
LBGs in the FIR domain can provide very important clues on their dust
attenuation and total SFR, allowing a more detailed study than those
performed so far. In this work we explore the FIR emission of a sample
of 16 LBGs at z ~ 3 in the GOODS-North and GOODS-South fields that are
individually detected in PACS-100um or PACS-160um. These detections
demonstrate the possibility of measuring the dust emission of LBGs at
high redshift. We find that…

continua

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

Scritto il 09 Apr 2013 alle 01:39 in Pubblicazioni

The old nova V728 Sco has been recently recovered via photometric and
spectroscopic observations, 150 yr 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 a…

continua