Banerjee, D. P. K., Das, R. K., Ashok, N. M., Rushton, M. T., Eyres, S. P. S., Maxwell, M. P., Worters, H. L., Evans, A. and Schaefer, B. E.
Near-infrared studies of the 2010 outburst of the recurrent nova U Scorpii.
Monthly Notices of the Royal Astronomical Society: Letters, 408
Official URL: http://dx.doi.org/10.1111/j.1745-3933.2010.00932.x
We present near-infrared (near-IR) observations of the 2010 outburst of U Sco. JHK photometry is presented on 10 consecutive days starting from 0.59 d after outburst. Such photometry can gainfully be integrated into a larger data base of other multiwavelength data which aim to comprehensively study the evolution of U Sco. Early near-IR spectra, starting from 0.56 d 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 ∼10 000 km s−1 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 [inline image] for the ejected mass.
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