Abstract Details
| Name: SOMNATH DUTTA Affiliation: S. N. Bose National Centre for Basic Sciences Conference ID: ASI2016_715 Title : A census of variable stars in the young cluster NGC 2282 from differential photometry Authors and Co-Authors : Soumen Mondal - S. N. Bose National Centre for Basic Sciences, Kolkata, India S. Joshi - Aryabhatta Research Institute of Observational Sciences, Nainital India J. Jose - Kavli Institute for Astronomy and Astrophysics,Peking University, Yi He Yuan Lu 5, Haidian District, Beijing 100871, China R. Das - S. N. Bose National Centre for Basic Sciences, Kolkata, India S. Ghosh - S. N. Bose National Centre for Basic Sciences, Kolkata, India Abstract Type : Poster Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : We report preliminary results of CCD {\it I} time series photometry of the young cluster NGC 2282 using two optical telescopes in India. The deep {\it I}-band ($\sim$ 20 mag) analysis enables us to probe the study of variability towards low-mass end of pre-main sequence (PMS) stars. The technique of differential photometry has been used to identify photometric variable stars, which provides high photometric precision, even in the central crowded nebulous region. Additionally, large rms deviation of magnitudes from normal trends and significant periods in a Lomb-Scargle analysis were also considered as signatures of variable stars. A total of 49 stars were found as photometric variable. The PMS members associated with the region were identified using infrared (IR) data from UKIDSS and {\it Spitzer}-IRAC. Based on the optical and NIR color-magnitude diagram analyses, the age of the probable PMS variable sources has been estimated to be in the range of 1$-$5 Myr. Masses of these PMS variable stars were found to be $\sim$ 0.15$-$3.0 M$_\odot$ and these could be T Tauri stars. Majority (85\%) of the variable T Tauri stars have periods less than 15 days, such periodic variability are proposed to be the results of rotational modulation by hot or cool stellar spots on the star surface. |