2005A&A...442..201S


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.16CET23:52:40

2005A&A...442..201S - Astronomy and Astrophysics, volume 442, 201-209 (2005/10-4)

Structure and stellar content analysis of the open cluster M11 with 2MASS photometry.

SANTOS J.F.C.Jr, BONATTO C. and BICA E.

Abstract (from CDS):

An overall analysis of the structure and stellar content of M11 is presented, thanks to the wide-angle 2MASS spatial coverage. We derive photometric and structural parameters and discuss the spatial dependance of the luminosity and mass functions. Photometric parameters basically agree with previous ones mostly based on the optical. We obtained a core radius of 1.23pc and a tidal radius of 29pc. In particular, the cluster is populous enough so that the tidal radius could be obtained by fitting the three-parameter King profile to the radial distribution of stars. We analyzed the spatial distribution of mass functions, finding that the slope changes from -0.73 in the core to +2.88 in the outer halo. The spatial distribution of mass function slopes derived from 2MASS agrees with that derived from optical CCD data, which further confirms the reliability of 2MASS data for future analyses of this kind at comparable observational limits. We detect mass segregation up to distances from the center of ≃20'. We emphasize that the mass function slope in the core is flatter than anywhere else as a consequence of mass segregation. The derived total cluster mass is ≃11000M.

Abstract Copyright:

Journal keyword(s): Galaxy: open clusters and associations: individual: M11

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 2447 OpC 07 44 30 -23 51.4           ~ 114 1
2 NGC 2477 OpC 07 52 10 -38 31.8   6.64 5.8     ~ 253 0
3 NGC 3680 OpC 11 25 38 -43 14.6   8.40 7.6     ~ 285 0
4 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11047 0
5 NAME Scutum Cloud Cld 18 43 -06.9           ~ 10 0
6 NGC 6705 OpC 18 51 05 -06 16.2   6.32 5.8     ~ 350 0
7 NAME Sgr Arm PoG 19 00 -30.0           ~ 496 1

    Equat.    Gal    SGal    Ecl

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2019.11.16-23:52:40

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