Zobrazeno 1 - 10
of 548
pro vyhledávání: '"Parmentier G"'
Autor:
Parmentier, G., Pasquali, A.
We present a novel approach to the riddle of star cluster multiple populations. Stars form from molecular cores. But not all cores form stars. Following their initial compression, such 'failed' cores re-expand, rather than collapsing. We propose that
Externí odkaz:
http://arxiv.org/abs/2110.14470
Autor:
Parmentier, G., Pasquali, A.
It is well-established that a gas density gradient inside molecular clouds and clumps raises their star formation rate compared to what they would experience from a gas reservoir of uniform density. This effect should be observed in the relation betw
Externí odkaz:
http://arxiv.org/abs/2009.10652
We study the impact of the tidal field on the survivability of star clusters following instantaneous gas expulsion. Our model clusters are formed with a centrally-peaked star-formation efficiency profile as a result of star-formation taking place wit
Externí odkaz:
http://arxiv.org/abs/1903.09560
Stars mostly form in groups consisting of a few dozen to several ten thousand members. For 30 years, theoretical models provide a basic concept of how such star clusters form and develop: they originate from the gas and dust of collapsing molecular c
Externí odkaz:
http://arxiv.org/abs/1408.6021
Direct N-body calculations are presented of the early evolution of exposed clusters to quantify the influence of gas expulsion on the time-varying surface brightness. By assuming that the embedded OB stars drive out most of the gas after a given time
Externí odkaz:
http://arxiv.org/abs/1112.1068
Autor:
Parmentier, G., Fritze, U.
Publikováno v:
Astrophys.J.690:1112-1118,2009
We investigate the impact of the star formation efficiency in cluster forming cores on the evolution of the mass in star clusters over the age range 1-100Myr, when star clusters undergo their infant weight-loss/mortality phase. Assuming a constant fo
Externí odkaz:
http://arxiv.org/abs/0809.2416
We explore how the expulsion of gas from star-cluster forming cloud-cores due to supernova explosions affects the shape of the initial cluster mass function, that is, the mass function of star clusters when effects of gas expulsion are over. We demon
Externí odkaz:
http://arxiv.org/abs/0802.1452
We present new results on the evolution of the mass function of the globular cluster system of the Milky Way, taking the effect of residual gas expulsion into account. We assume that gas embedded star clusters start with a power-law mass function wit
Externí odkaz:
http://arxiv.org/abs/0712.1591
Autor:
Steinmetz, M., Zwitter, T., Siebert, A., Watson, F. G., Freeman, K. C., Munari, U., Campbell, R., Williams, M., Seabroke, G. M., Wyse, R. F. G., Parker, Q. A., Bienayme, O., Roeser, S., Gibson, B. K., Gilmore, G., Grebel, E. K., Helmi, A., Navarro, J. F., Burton, D., Cass, C. J. P., Dawe, J. A., Fiegert, K., Hartley, M., Russell, K. S., Saunders, W., Enke, H., Bailin, J., Binney, J., Bland-Hawthorn, J., Boeche, C., Dehnen, W., Eisenstein, D. J., Evans, N. W., Fiorucci, M., Fulbright, J. P., Gerhard, O., Jauregi, U., Kelz, A., Mijovic, L., Minchev, I., Parmentier, G., Penarrubia, J., Quillen, A. C., Read, M. A., Ruchti, G., Scholz, R. -D., Siviero, A., Smith, M. C., Sordo, R., Veltz, L., Vidrih, S., von Berlepsch, R., Boyle, B. J., Schilbach, E.
Publikováno v:
Astron.J.132:1645-1668,2006
We present the first data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities and stellar atmosphere parameters (temperature, metallicity, surface gravity) of up to one million stars using
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606211
Publikováno v:
Mon.Not.Roy.Astron.Soc. 364 (2005) 1054-1062
We explore whether we can constrain the shape of the INITIAL mass distribution of the star cluster population in M82's ~1 Gyr-old post-starburst region "B", in which the present-day cluster mass function (CMF) is closely approximated by a log-normal
Externí odkaz:
http://arxiv.org/abs/astro-ph/0509721