Near-infrared study of open clusters Teutsch 10 and Teutsch 25 |
| |
Authors: | D. Bisht Shashikiran Ganesh R.K.S. Yadav Alok Durgapal Geeta Rangwal |
| |
Affiliation: | 1. Astronomy and Astrophysics Division, Physical Research Laboratory, Ahmedabad, India;2. Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital, India;3. Department of Physics, DSB Campus, Kumaun University, Nainital, India |
| |
Abstract: | The astrophysical parameters have been estimated for two unstudied open star clusters Teutsch 10 and Teutsch 25 using the Two Micron All Sky Survey () database. Radius is estimated as 4.5 arcmin for both clusters using radial density profiles. We have estimated proper motion values in both RA and DEC directions as and ?mas?yr?1 for Teutsch 10 and and ?mas?yr?1 for Teutsch 25 using 1 catalog. By estimating the stellar membership probabilities, we have identified 30 and 28 most likely members for Teutsch 10 and Teutsch 25 respectively. We have estimated the reddening as ?mag for Teutsch 10 and ?mag for Teutsch 25, while the corresponding distances are and ?kpc. Ages of ?Myr for Teutsch 10 and ?Myr for Teutsch 25 are estimated using the theoretical isochrones of metallicity Z?=?0.019. The mass function slopes are derived as and for Teutsch 10 and Teutsch 25 respectively. Estimated mass function slope for both the clusters are close to the Salpeter value () within the errors. Estimated values of dynamical relaxation time are found to be less than cluster’s age for these objects. This concludes that both objects are dynamically relaxed. The possible reason for relaxation may be due to dynamical evolution or imprint of star formation or both. |
| |
Keywords: | Galaxy Open cluster and associations Individual Teutsch 10 and Teutsch 25 Proper-motion Luminosity and mass function |
本文献已被 ScienceDirect 等数据库收录! |
|