Near-infrared studies of the 2010 outburst of the recurrent nova U Scorpii

Details Near-infrared studies of the 2010 outburst of the recurrent nova U Scorpii Near-infrared studies of the 2010 outburst of the recurrent nova U Scorpii

2010-08-06

arxiv.org/abs/1008.1210v2

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Accepted by MNRAS

Scientific paper

We present near-IR observations of the 2010 outburst of U Sco. JHK photometry is presented on ten consecutive days starting from 0.59 days after outburst. Such photometry can gainfully be integrated into a larger database of other multi-wavelength data which aim to comprehensively study the evolution of U Sco. Early near-IR spectra, starting from 0.56 days after outburst, are presented and their general characteristics discussed. Early in the eruption, we see very broad wings in several spectral lines, with tails extending up to ~10000km/s along the line of sight; it is unexpected to have a nova with ejection velocities equal to those usually thought to be exclusive to supernovae. From recombination analysis, we estimate an upper limit of 10^-4.64[+0.92.-0.74]Msun for the ejected mass.

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