HST/NICMOS III imaging in Orion Nebula Cluster : J/A+A/534/A10

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Authors : Andersen M. orcid , Meyer M.R., Robberto M. (hide) , Meyer M.R., Robberto M. et..al

VizieR DOI : 10.26093/cds/vizier.35340010
Bibcode : 2011A&A...534A..10A (ADS) (Simbad) (Objects)
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CDS Keywords : Clusters, open; Stars, pre-main sequence; Photometry, HST
UAT : Open star clusters, Pre-main sequence stars, HST photometry

Observation (OC)

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Inserted into VizieR : 25-Oct-2011
Last modification : 27-Dec-2011

The low-mass initial mass function in the Orion nebula cluster based on HST/NICMOS III imaging. (2011)

Keywords : brown dwarfs - stars formation - stars: pre-main sequence - stars: luminosity function, mass function - stars: low-mass

Abstract:We present deep HST/NICMOS Camera 3 F110W and F160W imaging of a 26'x33', corresponding to 3.1x3.8pc^2^, non-contiguous field towards the Orion Nebula Cluster (ONC). The main aim is to determine the ratio of low-mass stars to brown dwarfs for the cluster as a function of radius out to a radial distance of 1.5pc. The sensitivity of the data outside the nebulous central region is F160W<=21.0mag, significantly deeper than previous studies of the region over a comparable area. We create an extinction limited sample and determine the ratio of low-mass stars (0.08-1M_{sun}_) to brown dwarfs (0.02-0.08M_{sun}_ and 0.03-0.08M_{sun}_) for the cluster as a whole and for several annuli. The ratio found for the cluster within a radius of 1.5pc is ...(more)
Abstract: (hide)
Astronomy and Astrophysics policies
Photometry for sources in the HST/NICMOS survey and their location.
Morten Andersen, manderse(at)rssd.esa.int

                


                

                    

                


                

                    

                


                

                    
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