Whiting 1: A New Halo Young Globular Cluster →
The Astrophysical Journal Letters (01 March 2005), L61.
We report on BVI CCD photometry of a field centered in the region of the Galactic star cluster Whiting 1 down to V = 23.0. This cluster has…
Is the massive young cluster Westerlund I bound? →
(19 Dec 2011)
Context. Westerlund I is the richest young cluster currently known in our Galaxy, making it one of the most massive clusters for which we can resolve the individual stars even in the…
Simulations of the Hyades →
Astronomy & Astrophysics, Vol. 536, A64.
A Ernst, A Just, P Berczik, C Olczak
Relaxation-limited evaporation of globular clusters →
(9 Dec 2011)
Evaporative evolution of stellar clusters is shown to be relaxation limited when the number of stars satisfies $N»N_c$, where $N_c∼eq 1600$. For a Maxwell velocity distribution that…
The first confirmed microlens in a globular cluster →
(2 Dec 2011)
In July/August 2000 a microlensing event occurred at a distance of 2.33 arcmin from the center of the globular cluster M22 (NGC6656), observed against the dense stellar field of the…
Search for and Characterization of Galactic Open Clusters with 2MASS →
(30 Nov 2011)
We have developed a star-counting algorithm and tested it on the 2MASS star catalog to search for density enhancements significantly above the field in Galactic latitude…
Millihertz quasi-periodic oscillations and thermonuclear bursts from Terzan 5: A showcase of burning regimes →
(16 Nov 2011)
We present a comprehensive study of the thermonuclear bursts and millihertz quasi-periodic oscillations (mHz QPOs) from the neutron star (NS) transient and 11 Hz X-ray pulsar IGR…
2MASS photometry and age estimate of globular clusters in the outer halo of M31 →
(11 Nov 2011)
We present the first photometric results in J, H, and K_s from 2MASS imaging of 10 classical globular clusters in the far outer regions of M31. Combined with the V and I photometric…
