2011MNRAS.412.2489P

Query : 2011MNRAS.412.2489P

2011MNRAS.412.2489P - Mon. Not. R. Astron. Soc., 412, 2489-2497 (2011/April-3)

On the mass segregation of stars and brown dwarfs in Taurus.

PARKER R.J., BOUVIER J., GOODWIN S.P., MORAUX E., ALLISON R.J., GUIEU S. and GUDEL M.

Abstract (from CDS):

We use the new minimum spanning tree (MST) method to look for mass segregation in the Taurus association. The method computes the ratio of MST lengths of any chosen subset of objects, including the most massive stars and brown dwarfs, to the MST lengths of random sets of stars and brown dwarfs in the cluster. This mass segregation ratio (ΛMSR) enables a quantitative measure of the spatial distribution of high- and low-mass stars, and brown dwarfs to be made in Taurus.

We find that the most massive stars in Taurus are inversely mass segregated with ΛMSR= 0.70±0.10 (ΛMSR= 1 corresponds to no mass segregation), which differs from the strong mass segregation signatures found in more dense and massive clusters such as Orion. The brown dwarfs in Taurus are not mass segregated, although we find evidence that some low-mass stars are, with an ΛMSR= 1.25 ±0.15. Finally, we compare our results to previous measures of the spatial distribution of stars and brown dwarfs in Taurus, and briefly discuss their implications.


Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): methods: data analysis - brown dwarfs - stars: low-mass - galaxies: star clusters: individual: Taurus

Simbad objects: 6

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Number of rows : 6
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 NAME CAS-TAU ASS MGr 04 16 +27.6           ~ 86 1
2 NAME TAU-AUR T ASSOC Cl* 04 32 33 +26 04.6           ~ 48 0
3 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
4 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
5 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
6 Cl Trumpler 14 OpC 10 43 56.0 -59 33 07   5.70 5.5     ~ 547 0

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