Document Type

Letter to the Editor

Publication Date



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 000kms-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 10-4.64+0.92-0.74M⊙, for the ejected mass. © 2010 The Authors. Journal compilation © 2010 RAS.

Publication Source (Journal or Book title)

Monthly Notices of the Royal Astronomical Society: Letters