Globular clusters: Simple after all? (new paper accepted for MNRAS)

18 Sep

Screen Shot 2014-12-07 at 6.19.41 PMGlobular clusters are old compact systems containing up to a about a million of stars. How so many stars form in such a small area still remains unclear.  A particular puzzling feature is that effectively all globular cluster appear to harbor more than one stellar population within them.

In this paper we propose that a first generation of massive stars polluted their lower mass sisters while they were still fully convective PMS stars.  While details still need to be worked out, a very attractive feature of this scenario is that it provides a solution for the long standing mass budget problem.

Early Disc Accretion as the Origin of Abundance Anomalies in Globular Clusters“, by Bastian, Lamers, de Mink, Longmore, Goodwin & Gieles, 2013, MNRAS in press.

Multiple populations in Trumpler 20: stellar rotation or differential reddening? (New Paper)

29 Dec

The effects of differential reddening and stellar rotation  on the appearance of multiple populations in star clusters: the case of Trumpler 20. I. Platais, C. Melo, S. N. Quinn, J. L. Clem, S. E. de Mink, A. Dotter, V. Kozhurina-Platais, … Read More »

Fastest Rotating Star Found in Neighboring Galaxy (Press release ESO/STScI)

5 Dec

An international team of astronomers using the European Southern Observatory’s Very Large Telescope have found the fastest spinning star ever discovered. VFTS 102 rotates at a dizzying 1 million miles per hour and is very close to the point at … Read More »

A new record for the fastest rotating O-type star (New ApJ Letter)

1 Nov

The VLT-FLAMES Tarantula Survey: The fastest rotating O-type star and shortest period LMC pulsar – remnants of a supernova disrupted binary? P. L. Dufton, P. R. Dunstall, C. J. Evans, I. Brott, M. Cantiello, A. de Koter, S.E. de Mink, … Read More »