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Дата изменения: Tue Jan 10 15:40:47 2012 Дата индексирования: Tue Oct 2 17:35:38 2012 Кодировка: Поисковые слова: ngc 253 |
My main research interests are:
Star formation history in Virgo Cluster.
Using high resolution spectra and multiwavelengths photometry, I developed a
tool that reconstruct the star formation history of a defined region of a
galaxy. The tool is based on Beaysian method and produces an independent way to
study environmental effects in clusters. The method has been applied to a
galaxy that underwent ram pressure stripping in its recent past, NGC 4388. The
method showed that the star formation in the external disc was quenched about
200 Myr ago, because of the gas removal due to the ram pressure (Pappalardo et
al. 2010).
Molecular gas and dust in spiral discs.
Using different observational
facilities, mainly IRAM 30m telescope, I am investigating the presence of
molecular gas in spiral disc and I analyze possible correlation with neutral
gas and dust. In particular I am interested in the relation with HI deficiency
parameter (Giovanelli & Haynes 1984) and the gas to dust ratio in spiral discs.
Source Extractions in HeViCS.
I make part of the HeViCS consortium and I am
investigating the possibility to detect as many source as possible in the
cosmic infrared background. Since the number of sources is enormous, in the
order of thousands in a square of 0.5 degrees of side, I am investigating a way
to overcome the confusion noise limit.
Analysis of dust in ETG.
I am studying the presence of dust in early type
galaxies, from S0 to faint elliptical dwarfs. Using ALFALFA we want to compare
the dust emission with the neutral gas distribution.
Dust removal in spiral discs.
In 2006 I observed at IRAM-30m telescope NGC
4522, a galaxy that is undergoing at present the peak of the ram pressure, as
shown by extraplanar neutral gas observed at 21 cm. In the related paper
(Vollmer et al. 2008) we showed that also the molecular component can be
dislocated and removed, partially, from the disc. Starting from this
consideration I am at present analyzing all the spirals discs in the HeVICS
sample, to find evidences of dust removed or strongly perturbed by
environments, both ram pressure and/or tidal interactions.