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astro-ph.SR2015★ 9 cited
Follow-up observations of X-ray emitting hot subdwarf star: the He-rich sdO BD +37° 1977
N. La Palombara, P. Esposito, S. Mereghetti +2
We report on the results of the first XMM-Newton satellite observation of the luminous and helium-rich O-type subdwarf BD +37° 1977 carried out in April 2014. X-ray emission is det…
astro-ph.SR2011
The progenitor of a type Ia supernova with a short delay time?
S. Mereghetti, N. La Palombara, A. Tiengo +3
HD49798/RXJ0648.0-4418 is the only known X-ray binary composed of a hot subdwarf and a massive white dwarf (M=1.28+/-0.05 Msun). This system, with an orbital period of 1.55 days, i…