276 citations · 488 across the 6 of their papers we have counts for
6 papers
Variation of the cluster luminosity function across the disk of M51
M. R. Haas, M. Gieles, R. A. Scheepmaker +3
We study the luminosity function (LF) of the star clusters in M51. Comparing the observed LF with the LF resulting from artificial cluster populations suggests that there exists an…
Star cluster disruption by giant molecular clouds
M. Gieles, S. F. Portegies Zwart, H. Baumgardt +4
We investigate encounters between giant molecular clouds (GMCs) and star clusters. We propose a single expression for the energy gain of a cluster due to an encounter with a GMC, v…
Small Magellanic Cloud Be stars: colour-magnitude relations and mass-loss
W. J. de Wit, H. J. G. L. M. Lamers, J. B. Marquette +1
We present an analysis of optical lightcurves of Small Magellanic Cloud Be-type stars. Observations show that (1) optical excess flux is correlated with near-IR excess flux indicat…
The Star Cluster Population of M51: II. Age distribution and relations among the derived parameters
N. Bastian, M. Gieles, H. J. G. L. M. Lamers +2
We use archival {\it Hubble Space Telescope} observations of broad-band images from the ultraviolet (F255W-filter) through the near infrared (NICMOS F160W-filter) to study the star…
Theoretical and Observational Agreement on Mass Dependence of Cluster Life Times
M. Gieles, H. Baumgardt, N. Bastian +1
Observations and N-body simulations both support a simple relation for the disruption time of a cluster as a function of its mass of the form: t_dis = t_4 * (M/10^4 Msun)^gamma. Th…
WRAY 977 (GX301-2): A HYPERGIANT WITH PULSAR COMPANION
L. Kaper, H. J. G. L. M. Lamers, E. Ruymaekers +2
Wray 977, the B supergiant companion of the X-ray pulsar GX301-2, should be classified as B1~Ia+, based on a comparison of its optical spectrum to that of zeta1 Sco, a well-known B…