Zobrazeno 1 - 10
of 350
pro vyhledávání: '"Glebbeek, A."'
In young dense clusters repeated collisions between massive stars may lead to the formation of a very massive star (above 100 Msun). In the past the study of the long-term evolution of merger remnants has mostly focussed on collisions between low-mas
Externí odkaz:
http://arxiv.org/abs/1307.2445
Autor:
Wong, Tsing-Wai, Valsecchi, Francesca, Ansari, Asna, Fragos, Tassos, Glebbeek, Evert, Kalogera, Vassiliki, McClintock, Jeffrey
The extragalactic X-ray binary IC 10 X-1 has attracted attention as it is possibly the host of the most massive stellar-mass black-hole (BH) known to date. Here we consider all available observational constraints and construct its evolutionary histor
Externí odkaz:
http://arxiv.org/abs/1304.3756
We created artificial color-magnitude diagrams of Monte Carlo dynamical models of globular clusters, and then used observational methods to determine the number of blue stragglers in those clusters. We compared these blue stragglers to various cluste
Externí odkaz:
http://arxiv.org/abs/1303.2667
Blue straggler stars (BSS) are abundantly observed in all Galactic globular clusters (GGC) where data exist. However, observations alone cannot reveal the relative importance of various formation channels or the typical formation times for this well
Externí odkaz:
http://arxiv.org/abs/1302.7284
Autor:
Leigh, Nathan, Knigge, Christian, Sills, Alison, Perets, Hagai, Sarajedini, Ata, Glebbeek, Evert
(abridged) We use newly available empirical binary fractions for globular clusters to carry out a direct test of the binary evolution hypothesis, and of collisional channels that involve binary stars. More specifically, using the previously reported
Externí odkaz:
http://arxiv.org/abs/1210.0542
Publikováno v:
A&A 547, A76, 2012
Most carbon-enhanced metal-poor (CEMP) stars are thought to result from past mass transfer of He-burning material from an asymptotic giant branch (AGB) star to a low-mass companion star, which we now observe as a CEMP star. Because AGB stars of inter
Externí odkaz:
http://arxiv.org/abs/1209.6082
Autor:
Ivanova, N., Justham, S., Chen, X., De Marco, O., Fryer, C. L., Gaburov, E., Ge, H., Glebbeek, E., Han, Z., Li, X. -D., Lu, G., Marsh, T., Podsiadlowski, Ph., Potter, A., Soker, N., Taam, R., Tauris, T. M., Heuvel, E. P. J. van den, Webbink, R. F.
This work aims to present our current best physical understanding of common-envelope evolution (CEE). We highlight areas of consensus and disagreement, and stress ideas which should point the way forward for progress in this important but long-standi
Externí odkaz:
http://arxiv.org/abs/1209.4302
Autor:
Leigh, Nathan, Umbreit, Stefan, Sills, Alison, Knigge, Christian, de Marchi, Guido, Glebbeek, Evert, Sarajedini, Ata
We present a new technique to quantify cluster-to-cluster variations in the observed present-day stellar mass functions of a large sample of star clusters. Our method quantifies these differences as a function of both the stellar mass and the total c
Externí odkaz:
http://arxiv.org/abs/1202.2851
Observations indicate blue globular clusters have half-light radii systematically larger than those of red globular clusters. In this paper, we test whether the different metallicity-dependent stellar evolution timescales and mass-loss rates within t
Externí odkaz:
http://arxiv.org/abs/1110.5878
Subdwarf B stars show chemical peculiarities that cannot be explained by diffusion theory alone. Both mass loss and turbulence have been invoked to slow down atomic diffusion in order to match observed abundances. The fact that some sdB stars show pu
Externí odkaz:
http://arxiv.org/abs/1108.1318