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Identification of an X-ray Pulsar in the BeXRB system IGR J182191347
B. O'Connor, E. Gogus, D. Huppenkothen +25
We report on observations of the candidate Be/X-ray binary IGR J182191347 with \textit{Swift}/XRT, \textit{NuSTAR}, and \textit{NICER} during Type-I outbursts in March and June…
Confirming NGC 6231 as the parent cluster of the runaway high-mass X-ray binary HD 153919/4U 1700-37 with Gaia DR2
Vincent van der Meij, Difeng Guo, Lex Kaper +1
A significant fraction of the most massive stars move through space with a high velocity. One of the possible physical explanations is that a supernova in a compact binary system r…
Fine structure in the luminosity function in young stellar populations with Gaia DR2
Difeng Guo, Alex de Koter, Lex Kaper +2
A pioneering study showed that the fine structure in the luminosity function (LF) of young star clusters contains information about the evolutionary stage (age) and composition of…
A relation between the radial velocity dispersion of young clusters and their age: Evidence for hardening as the formation scenario of massive close binaries
M. C. Ramírez-Tannus, F. Backs, A. de Koter +8
The majority of massive stars ( ) in OB associations are found in close binary systems. Nonetheless, the formation mechanism of these close massive binaries is…