Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21460503d&link_type=abstract
American Astronomical Society, AAS Meeting #214, #605.03
Astronomy and Astrophysics
Astronomy
Scientific paper
Approximately half of the young stars with ages of about 1 million years are still embedded in its parent molecular cloud showing strong emission in the infrared region. This emission is believed to be produced in the dusty optically-thick disk surrounding the star. However, the optically-thick disk emission disappears at ages of about 30 Myr. The explanation for this is that dust grains agglomerate in larger bodies, forming planetesimals and ultimately planets, which sweep up much of the remaining gas and dust. To characterize the evolution of protoplanetary disk it is necessary to study samples of stars in the appropiate age range. However, the lack of suitable samples has been a problem to carry out such studies. In this work, one of our goals is to determine the age of various young clusters by means of UBVRI photometric observations. Once we have derived ages for the clusters in the sample, we will select the best stellar candidates whose age ranges between 3 and 10 million years.
We present preliminary results of the UBVRI photometry for one of our young clusters in the sample, NGC 6823. Observations were taken at the 1.5 m at the San Pedro Martir Observatory, Universidad Nacional Autonoma de Mexico in 2009 March 27 to April 1. Data reduction was performed using IRAF standard procedures. We have obtained a color-magnitude diagram for NGC 6823 and we have compared it with the Girardi et al. (2000) isochrones in order to derive stellar ages.
This work was supported by grants CONACYT 103914 and Programa de Colaboracion
Academica y Cultural UNISON-UNAM U38P167.
Contreras Espinoza M.
Del Carmen Azucena
Perez-Rendon Brenda
No associations
LandOfFree
Photometric Search of Protoplanetary Disks in Young Stellar Clusters does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Photometric Search of Protoplanetary Disks in Young Stellar Clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photometric Search of Protoplanetary Disks in Young Stellar Clusters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1766581