28 citations · 141 across the 10 of their papers we have counts for
4 papers · 1 filter
On the association of ULXs with young superclusters: M82 X-1 and a new candidate in NGC 7479
R. Voss, M. T. B. Nielsen, G. Nelemans +2
We investigate the spatial coincidence of ultra-luminous X-ray sources (ULXs) with young massive stellar clusters. In particular we perform astrometry on Chandra and HST data of tw…
Obscuring Supersoft X-ray Sources in Stellar Winds
Mikkel Thomas Bøje Nielsen, Carsten Dominik, Gijs Nelemans
We investigate the possibility of obscuring supersoft X-ray sources in the winds of companion stars. We derive limits on the amount of circumstellar material needed to fully obscur…
Upper limits on bolometric luminosities of ten type Ia supernova progenitors from Chandra observations
Mikkel T. B. Nielsen, Rasmus Voss, Gijs Nelemans
We present an analysis of Chandra observations of the position of ten nearby (< 25 Mpc) type Ia supernovae, taken before the explosions. No sources corresponding to progenitors wer…
Finding Supernova Ia Progenitors with the Chandra X-ray Observatory
Mikkel T. B. Nielsen, Gijs Nelemans, Rasmus Voss
We examine pre-supernova Chandra images to find X-ray luminosities of type Ia supernova progenitors. At present, we have one possible direct detection and upper limits for the X-ra…