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J/other/NewA/19.1 Ages and masses of NGC1893 PMS stars (Pandey+, 2013)
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Beginning of ReadMe :J/other/NewA/19.1 Ages and masses of NGC1893 PMS stars (Pandey+, 2013)
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Pre-main-sequence population in NGC 1893 region.
Pandey A.K., Samal M.R., Chauhan N., Eswaraiah C., Pandey J.C., Chen W.P.,
Ojha D.K.
<New Astron., 19, 1-9 (2013)>
=2013NewA...19....1P
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ADC_Keywords: Clusters, open ; Stars, pre-main sequence ; Stars, ages ;
Stars, masses
Keywords: open clusters and associations: individual: NGC 1893 -
stars: formation - stars: pre-main-sequence
Abstract:
In this paper we continued our efforts to understand the star
formation scenario in and around the young cluster NGC 1893. We used
a sample of the young stellar sources (YSOs) identified on the basis
of multiwavelength data (optical, near-infrared (NIR), mid-infrared
(MIR) and X-ray) to study the nature of YSOs associated with the
region. The identified YSOs show an age spread of 5Myr. The YSOs
located near the nebulae at the periphery of the cluster are
relatively younger in comparison to those located within the cluster
region. The present results are in accordance with those obtained by
us in previous studies. Other main results from the present study are:
1) the fraction of disk bearing stars increases towards the periphery
of the cluster; 2) there is an evidence supporting the notion that the
mechanisms for disk dispersal operate less efficiently for low-mass
stars; 3) the sample of Class II sources is found to be relatively
older in comparison to that of Class III sources. A comparison of
various properties of YSOs in the NGC 1893 region with those in the
Tr 37/ IC 1396 region is also discussed.
Description:
On the basis of optical, NIR, MIR and X-ray data P11 have identified
1034 and 442 Class II and Class III YSOs, respectively. We have used
the optical and NIR data for the above mentioned YSOs given by
Prisinzano et al. (2011A&A...527A..77P, Cat. J/A+A/527/A77). Whenever
the NIR data for these sources are not available in the catalogue by
P11, the same have been taken from the Two Micron All Sky Survey
(2MASS) Point Source Catalog (PSC) (Cutri et al., 2003, Cat. II/246).