SIMBAD references

2009MNRAS.392.1034O - Mon. Not. R. Astron. Soc., 392, 1034-1050 (2009/January-3)

The low-mass initial mass function in the young cluster NGC 6611.


Abstract (from CDS):

NGC6611 is the massive young cluster (2-3Myr) that ionizes the Eagle Nebula. We present very deep photometric observations of the central region of NGC6611 obtained with the Hubble Space Telescope and the following filters: ACS/WFC F775W and F850LP and NIC2 F110W and F160W, loosely equivalent to ground-based IZJH filters. This survey reaches down to I ∼ 26mag. We construct the initial mass function (IMF) from ∼1.5Mwell into the brown dwarf regime (down to ∼0.02M). We have detected 30-35 brown dwarf candidates in this sample. The low-mass IMF is combined with a higher-mass IMF constructed from the ground-based catalogue from Oliveira et al. We compare the final IMF with those of well-studied star-forming regions: we find that the IMF of NGC6611 more closely resembles that of the low-mass star-forming region in Taurus than that of the more massive Orion Nebula Cluster. We conclude that there seems to be no severe environmental effect in the IMF due to the proximity of the massive stars in NGC6611.

Abstract Copyright: © 2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): stars: late-type - stars: low-mass, brown dwarfs - stars: luminosity function, mass function - stars: pre-main-sequence - open cluster and associations: individual: NGC6611

VizieR on-line data: <Available at CDS (J/MNRAS/392/1034): table1.dat table2.dat>

Nomenclature: Tables 1, 2: [OJV2009] N=435.

Simbad objects: 362

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