234 citations · 969 across the 22 of their papers we have counts for
5 papers · 1 filter
The Be/X-ray transient 4U 0115+63/V635 Cassiopeiae. III. Quasi-cyclic variability
P. Reig, V. Larionov, I. Negueruela +2
4u 0115+63 is one of the most active and best studied Be/X-ray transients. Previous studies of 4u0115+63 have led to the suggestion that it undergoes relatively fast quasi-cyclic a…
A search for counterparts to massive X-ray binaries using photometric catalogues
Ignacio Negueruela, Matthew Schurch
(abridged) INTEGRAL has discovered large numbers of new hard X-ray sources, many of which are believed to be high mass X-ray binaries. However, for a significant fraction, their co…
A census of the Wolf-Rayet content in Westerlund 1 from near-infrared imaging and spectroscopy
Paul A. Crowther, L. J. Hadfield, J. S. Clark +2
New NTT/SOFI imaging and spectroscopy of the Wolf-Rayet population in Westerlund 1 are presented. Narrow-band near-IR imaging together with follow up spectroscopy reveals four new…
New Gamma Cas-like objects: X-ray and optical observations of SAO49725 and HD161103
Raimundo Lopes de Oliveira, Christian Motch, Frank Haberl +2
A growing number of early Be stars exhibit unusually hard X-ray spectra and luminosities intermediate between those typical of early type stars and those emitted by most Be/X-ray b…
Multiplicity, activity and fast rotation in early-type stars
Ignacio Negueruela
There are obvious and direct ways in which the presence of binary companions may affect activity in OB stars through tidal interactions. In this review, however, I consider a more…