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pro vyhledávání: '"Weidner, Carsten"'
It has been claimed in the recent literature that a non-trivial relation between the mass of the most-massive star, mmax, in a star cluster and its embedded star cluster mass (the mmax-Mecl relation) is falsified by observations of the most-massive s
Externí odkaz:
http://arxiv.org/abs/1404.1075
Observational studies are showing that the galaxy-wide stellar initial mass function are top-heavy in galaxies with high star-formation rates (SFRs). Calculating the integrated galactic stellar initial mass function (IGIMF) as a function of the SFR o
Externí odkaz:
http://arxiv.org/abs/1309.6634
Recent evidence based independently on spectral line strengths and dynamical modelling point towards a non-universal stellar Initial Mass Function (IMF), probably implying an excess of low-mass stars in elliptical galaxies with a high velocity disper
Externí odkaz:
http://arxiv.org/abs/1306.6332
We introduce a new method to measure the dispersion of mmax values of star clusters and show that the observed sample of mmax is inconsistent with random sampling from an universal stellar initial mass function (IMF) at a 99.9% confidence level. The
Externí odkaz:
http://arxiv.org/abs/1306.1229
Autor:
Kroupa, Pavel, Weidner, Carsten, Pflamm-Altenburg, Jan, Thies, Ingo, Dabringhausen, Joerg, Marks, Michael, Maschberger, Thomas
The current knowledge on the stellar IMF is documented. It appears to become top-heavy when the star-formation rate density surpasses about 0.1Msun/(yr pc^3) on a pc scale and it may become increasingly bottom-heavy with increasing metallicity and in
Externí odkaz:
http://arxiv.org/abs/1112.3340
The question whether or not massive stars can form in isolation or only in star clusters is of great importance for the theory of (massive) star-formation as well as for the stellar initial mass function of whole galaxies (IGIMF-theory). While a seem
Externí odkaz:
http://arxiv.org/abs/1111.0294
Star formation rates (SFR) larger than 1000 Msun/ yr are observed in extreme star bursts. This leads to the formation of star clusters with masses > 10^6 Msun in which crowding of the pre-stellar cores may lead to a change of the stellar initial mass
Externí odkaz:
http://arxiv.org/abs/1011.3814
The functional form of the galaxy-wide stellar initial mass function is of fundamental importance for understanding galaxies. So far this stellar initial mass function has been assumed to be identical to the IMF observed directly in star clusters. Bu
Externí odkaz:
http://arxiv.org/abs/1011.2200
Over the past years observations of young and populous star clusters have shown that the stellar initial mass function (IMF) can be conveniently described by a two-part power-law with an exponent alpha_2 = 2.3 for stars more massive than about 0.5 Ms
Externí odkaz:
http://arxiv.org/abs/1011.1905
Autor:
Weidner, Carsten, Vink, Jorick
Context. The "mass discrepancy" in massive O stars represents a long-standing problem in stellar astrophysics with far-reaching implications for the chemical and dynamical feedback in galaxies. Aims. Our goal is to investigate this mass discrepancy b
Externí odkaz:
http://arxiv.org/abs/1010.2204