Pubblicazioni

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

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U Sco 2010 outburst: a new understanding of the binary accretion disk and the secondary star

Scritto il 04 Lug 2012 alle 01:39 in Pubblicazioni

We present optical and NIR spectroscopic observations of U Sco 2010
outburst. From the analysis of lines profiles we identify a broad and a
narrow component and show that the latter originates from the reforming
accretion disk. We show that the accretion resumes shortly after the
outburst, on day +8, roughly when the super-soft (SSS) X-ray phase
starts. Consequently U Sco SSS phase is fueled (in part or fully) by
accretion and should not be used to estimate $m_{\mathrm{rem}}$, the
mass of accreted material which has not been ejected during the
outburst. In addition, most of the He emission…

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Life after eruption - I. Spectroscopic observations of 10 nova candidates

Scritto il 26 Giu 2012 alle 01:39 in Pubblicazioni

We have started a project to investigate the connection of post-novae
with the population of cataclysmic variables (CVs). Our first steps in
this concern improving the sample of known post-novae and their
properties. Here we present the recovery and/or confirmation of the old
novae MT Cen, V812 Cen, V655 CrA, IL Nor, V2109 Oph, V909 Sgr, V2572 Sgr
and V728 Sco. Principal photometric and spectroscopic properties of
these systems are discussed. We find that V909 Sgr is a probable
magnetic CV, and that V728 Sco is a high-inclination system. We
furthermore suggest that the two candidate novae…

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2012 JO4

Scritto il 12 Giu 2012 alle 01:41 in Pubblicazioni

Available from the Minor Planet Center.