Abstract Details
| Name: DHRIMADRI KHATA Affiliation: S.N.BOSE NATIONAL CENTRE FOR BASIC SCIENCES Conference ID: ASI2018_1357 Title : Understanding Physical Properties of Young M-dwarfs: Optical and Near-IR Spectroscopic studies. Authors and Co-Authors : Dhrimadri Khata, Soumen Mondal, Ramkrishna Das and Supriyo Ghosh; Department of Astrophysics & Cosmology, S.N.Bose National Centre for Basic Sciences, JD Block, Sector - III, Salt Lake, Kolkata 700106 Abstract Type : Poster Abstract Category : Stars,ISM and the Galaxy Abstract : A large population of M-dwarfs (more than 70% of all stars) is becoming attractive targets as a representative of archaeological record of the chemical evolution, star formation history of the Milky Way and as potential habitable exoplanet host stars. A sample of young M-dwarfs from young moving groups and old population from the galactic field is observed using optical HFOSC and Near-IR TIRSPEC instruments (R=1200) on 2m Himalayan Chandra Telescope (HCT) at Hanle. The main goal is to quantify the changes in the strength of several atomic and molecular absorption features with spectral types and to find the correlation with different fundamental parameters like effective temperature (Teff), surface gravity (logg), metallicity ([M/H]), etc. To complement with observation, the synthetic spectra from PHOENIX (BT-Settl) model grid and moderate resolution NIR(1-2.5 μm) archival observed spectra (IRTF SpeX) for different spectral types (M0V-M9V) is taken to support a qualitative validation of our approach. These will help us to find the best-fit of these parameters as well as to determine radii, ages, and masses, etc., which will provide a roadmap for future target selection of transit search around the young and old population of M dwarfs. |