Results 101 to 110 of about 2,806,307 (206)

The stellar IMF from Isothermal MHD Turbulence

, 2018
We address the turbulent fragmentation scenario for the origin of the stellar initial mass function (IMF), using a large set of numerical simulations of randomly driven supersonic MHD turbulence.
Haugbølle, Troels, Nordlund, Aake, Padoan, Paolo   +2 more
core   +1 more source

Constraining the initial mass function of stars in the Galactic Centre

, 2009
(abridged) Here we discuss the question whether the extreme circumstances in the centre of the Milky Way may be the reason for a significant variation of the IMF.
Alexander, Amaro-Seoane, Bahcall, Bailey, Bartko, Bartko, Baumgardt, Baumgardt, Baumgardt, Baumgardt, Bertelli, Binney, Bonnell, Buchholz, Cohen, Dabringhausen, Dale, Davies, Espinoza, Figer, Figer, Freitag, Fujii, Genzel, Genzel, Gerhard, H. Baumgardt, Hurley, Kalirai, Kim, Klessen, Kroupa, Kroupa, Kroupa, Larson, Levin, Lu, Lu, Löckmann, Löckmann, Löckmann, Löckmann, Maness, Mapelli, Marigo, McMillan, Merritt, Morris, Muno, Nayakshin, Nayakshin, Nayakshin, P. Kroupa, Paumard, Portegies Zwart, Preto, Salpeter, Schödel, Schödel, Sellwood, Sheth, Stolte, Thorsett, U. Löckmann   +63 more
core   +1 more source

The minimum stellar metallicity observable in the Galaxy

, 2008
The first stars fundamentally transformed the early Universe through their production of energetic radiation and the first heavy chemical elements. The impact on cosmic evolution sensitively depends on their initial mass function (IMF), which can be ...
Adelman-McCarthy, Anna Frebel, Barkana, Beers, Bondi, Bromm, Bromm, Carollo, Christlieb, Ciardi, Collet, Frebel, Frebel, Frebel, Freeman, Fulbright, Heger, Iben, Iwamoto, Jarrett L. Johnson, Johnson, Johnston, Karlsson, Lacey, Lee, Munn, Norris, Oey, Pagel, Salvadori, Schneider, Talbot, Tumlinson, Umeda, Volker Bromm, Yoshii   +35 more
core   +1 more source

The SL2S Galaxy-scale Lens Sample. V. Dark Matter Halos and Stellar IMF of Massive Early-type Galaxies out to Redshift 0.8

, 2014
We investigate the cosmic evolution of the internal structure of massive early-type galaxies over half of the age of the Universe. We perform a joint lensing and stellar dynamics analysis of a sample of 81 strong lenses from the SL2S and SLACS surveys ...
Auger, Matthew W., Gavazzi, Raphael, Marshall, Philip J., Nipoti, Carlo, Sonnenfeld, Alessandro, Suyu, Sherry H., Treu, Tommaso   +6 more
core   +3 more sources

The effects of the IMF on the chemical evolution of elliptical galaxies

, 2017
14 pages, 6 figures, accepted for publication in ...
De Masi, Carlo Maria, Matteucci, Francesca, Vincenzo, Fiorenzo   +2 more
openaire   +2 more sources

Simulating a White Dwarf-dominated Galactic Halo

, 2003
Observational evidence has suggested the possibility of a Galactic halo which is dominated by white dwarfs (WDs). While debate continues concerning the interpretation of this evidence, it is clear that an initial mass function (IMF) biased heavily toward
B. K. Gibson, C. B. Brook, D. Kawata, Graff   +3 more
core   +2 more sources

Evolution of close binaries after the burst of starformation for different IMFs

, 1997
12 pages, 4 PostScript figures, to be presented as a poster at the conference "Cosmology: from COBE to galaxy formation", 1-7 December 1997 ...
Popov, S. B., Lipunov, V. M., Prokhorov, M. E., Postnov, K. A.   +3 more
openaire   +2 more sources

Mass-loss and expansion of ultra compact dwarf galaxies through gas expulsion and stellar evolution for top-heavy stellar initial mass functions

, 2010
(abridged) The dynamical V-band mass-to-light ratios of ultra compact dwarf galaxies (UCDs) are higher than predicted by simple stellar population models with the canonical stellar initial mass function (IMF).
Adams, Barnes, Baugh, Baumgardt, Binney, Blumenthal, Boily, Bonnell, Bonnell, Carroll, Casares, Chary, Chevalier, Clark, D'Antona, Dabringhausen, Dabringhausen, Decressin, Decressin, Drinkwater, Drinkwater, Elmegreen, Elmegreen, Elmegreen, Evstigneeva, Fellhauer, Fellhauer, Fellhauer, Fellhauer, Fellhauer, Figer, Figer, Figer, Forbes, Goerdt, Goodwin, Goodwin, Hartmann, Haşegan, Heggie, Hilker, Hilker, J. Dabringhausen, Jordán, King, Koester, Kormendy, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kumar, Lada, Larson, Lyne, M. Fellhauer, Maness, Maraston, Massey, McLaughlin, Melioli, Metz, Mieske, Mieske, Mieske, Mieske, Mieske, Mieske, Murray, Murray, Nagashima, Oey, P. Kroupa, Phillipps, Plummer, Prantzos, Recchi, Schaller, Tenorio-Tagle, Thorsett, Van Dokkum, Weidner, Woosley, Wuchterl   +85 more
core   +1 more source

Chemical enrichment of Damped Lyman Alpha systems as a direct constraint on Population III star formation

, 2013
Damped Ly-alpha absorbers (DLAs) can be used to measure gas-phase metallicities at large cosmological lookback times with high precision. Relative abundances can still be measured accurately deep into the reionization epoch (z > 6) using transitions ...
Hennawi, Joseph F., Kulkarni, Girish, Rollinde, Emmanuel, Vangioni, Elisabeth   +3 more
core   +2 more sources

First Detection of CO Isotopologues in a High-redshift Main-sequence Galaxy: Evidence of a Top-heavy Stellar Initial Mass Function

The Astrophysical Journal
Recent observations and theories have presented a strong challenge to the universality of the stellar initial mass function (IMF) in extreme environments. A notable example has been found for starburst conditions, where evidence favors a top-heavy IMF, i.
Ziyi Guo, Zhi-Yu Zhang, Zhiqiang Yan, Eda Gjergo, Allison W. S. Man, R. J. Ivison, Xiaoting Fu, Yong Shi   +7 more
doaj   +1 more source