2008ApJ...683L.183A

Query : 2008ApJ...683L.183A

2008ApJ...683L.183A - Astrophys. J., 683, L183-L186 (2008/August-3)

Evidence for a turnover in the initial mass function of low-mass stars and substellar objects: analysis from an ensemble of young clusters.

ANDERSEN M., MEYER M.R., GREISSL J. and AVERSA A.

Abstract (from CDS):

We present a combined analysis of the low-mass initial mass function (IMF) for seven star-forming regions. We first demonstrate that the ratios of stars to brown dwarfs are consistent with a single underlying IMF. By assuming that the underlying IMF is the same for all seven clusters and by combining the ratio of stars to brown dwarfs from each cluster, we constrain the shape of the brown dwarf IMF and find it to be consistent with a lognormal IMF. This provides the strongest constraint yet that the substellar IMF turns over (dN/dM∝M–α, α<0).

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Journal keyword(s): Stars: Formation - Stars: Low-Mass, Brown Dwarfs - Stars: Luminosity Function, Mass Function - Stars: Pre-Main-Sequence

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
2 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
3 NAME Taurus Cluster OpC 04 24 03.905 +26 53 24.40           ~ 79 0
4 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
5 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
6 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1198 1
7 NAME Mon R2 HII 06 07 47.58 -06 22 42.6           ~ 789 2
8 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1

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