Clues to Substellar Formation: Rotation and the Low-Mass End of the Initial Mass Function

Author(s):  
María Rosa Zapatero Osorio ◽  
José Caballero ◽  
Eduardo L. Martín ◽  
Víctor J. S. Béjar ◽  
Rafael Rebolo
1998 ◽  
Vol 508 (1) ◽  
pp. 347-369 ◽  
Author(s):  
K. L. Luhman ◽  
G. H. Rieke ◽  
C. J. Lada ◽  
E. A. Lada

2006 ◽  
Vol 460 (1) ◽  
pp. 133-144 ◽  
Author(s):  
F. Damiani ◽  
G. Micela ◽  
S. Sciortino ◽  
N. Huélamo ◽  
A. Moitinho ◽  
...  

1999 ◽  
Vol 186 ◽  
pp. 243-250
Author(s):  
Claus Leitherer

Starburst galaxies are currently forming massive stars at prodigious rates. I discuss the star-formation histories and the shape of the initial mass function, with particular emphasis on the high- and on the low-mass end. The classical Salpeter IMF is consistent with constraints from observations of the most massive stars, irrespective of environmental properties. The situation at the low-mass end is less clear: direct star counts in nearby giant H II regions show stars down to ~1 M⊙, whereas dynamical arguments in some starburst galaxies suggest a deficit of such stars.


2000 ◽  
Vol 541 (2) ◽  
pp. 977-1003 ◽  
Author(s):  
Joan R. Najita ◽  
Glenn P. Tiede ◽  
John S. Carr

2004 ◽  
Vol 21 (2) ◽  
pp. 144-147 ◽  
Author(s):  
L. Portinari ◽  
J. Sommer-Larsen ◽  
R. Tantalo

AbstractCosmological simulations of disk galaxy formation, when compared to the observed Tully–Fisher relation, suggest a low mass to light (M/L) ratio for the stellar component in spirals. We show that a number of 'bottom-light' initial mass functions (IMFs) suggested independently in the literature, do imply M/L ratios as low as required, at least for late type spirals (Sbc–Sc). However the typical M/L ratio, and correspondingly the zero point of the Tully–Fisher relation, is expected to vary considerably with Hubble type.Bottom-light IMFs tend to have a metal production in excess of what is typically estimated for spiral galaxies. Suitable tuning of the IMF slope and mass limits, post-supernova fallback of metals onto black holes or metal outflows must then be invoked, to reproduce the observed chemical properties of disk galaxies.


2009 ◽  
Vol 392 (3) ◽  
pp. 1034-1050 ◽  
Author(s):  
J. M. Oliveira ◽  
R. D. Jeffries ◽  
J. Th. van Loon

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