We report on the spectroscopic observations of the 2011 outburst of the Recurrent Nova T Pyx. The observations were obtained over the first two months of the outburst and they were made using two different high resolution echelle spectrographs: VLT-XSHOOTER and TNG-SARG. The first observation was obtained one day after the discovery of the outburst, so that we were able to follow the evolution of the nova from the very early emission before the maximum luminosity of the nova. Such early observation allowed us to detect the transition of the nova spectral emission from a He-N to a Fe II spectrum. The multiple absorptions observed in the P-Cyg profiles suggest the presence of a clumpy wind surrounding the white dwarf. The ejecta velocities are of the order of 1600-1800 km/s, similar to the velocities reported in the previous outburst in 1966. Further observations are planned in order to follow the late behavior of this peculiar recurrent nova.
Optical and near infrared multi-site follow up of the recurrent nova T Pyx / Izzo, L.; Ederoclite, A.; Della Valle, M.; Mason, E.; Williams, R. E.; Altamore, T.; Cassatella, A.; Gilmozzi, R.; Patat, F.; Schmidtobreick, L.; Selvelli, P.; Tappert, C.; Thater, S.; Covone, Giovanni; Dall'Ora, M.; Paolillo, Maurizio. - In: MEMORIE DELLA SOCIETÀ ASTRONOMICA ITALIANA. - ISSN 1824-016X. - 83:(2012), pp. 830-834. (Intervento presentato al convegno Workshop on the golden age of cataclysmic variables and related objects tenutosi a Palermo nel 12-17 settembre 2011).
Optical and near infrared multi-site follow up of the recurrent nova T Pyx
COVONE, GIOVANNI;PAOLILLO, MAURIZIO
2012
Abstract
We report on the spectroscopic observations of the 2011 outburst of the Recurrent Nova T Pyx. The observations were obtained over the first two months of the outburst and they were made using two different high resolution echelle spectrographs: VLT-XSHOOTER and TNG-SARG. The first observation was obtained one day after the discovery of the outburst, so that we were able to follow the evolution of the nova from the very early emission before the maximum luminosity of the nova. Such early observation allowed us to detect the transition of the nova spectral emission from a He-N to a Fe II spectrum. The multiple absorptions observed in the P-Cyg profiles suggest the presence of a clumpy wind surrounding the white dwarf. The ejecta velocities are of the order of 1600-1800 km/s, similar to the velocities reported in the previous outburst in 1966. Further observations are planned in order to follow the late behavior of this peculiar recurrent nova.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
