Abstract Details
| Name: Manoj Puravankara Affiliation: TIFR, Mumbai Conference ID: ASI2018_933 Title : A comparative analysis of X-ray emission from young stars in Orion and Carina Authors and Co-Authors : Mahathi Chavali (Manipal University), Blesson Mathew (Christ University), Mayank Narang (TIFR) Abstract Type : Poster Abstract Category : Stars,ISM and the Galaxy Abstract : The aim of the work is to investigate the X-ray emission from low mass (<2M☉) young (< 2 Myr – 10 Myr) stars in the pre-main-sequence phase of stellar evolution, and study the time evolution of the emission. We carried out a comparative study of X-ray emission by picking two young star forming regions: Orion Nebula and Carina. These nebulae have been studied in X-rays using Chandra X-ray telescope, which has an excellent spatial resolution of one 1â€. The Orion Nebula Cluster is 450 pc away from the earth and has been observed by Chandra in one of the deepest and longest X-ray observation ever made of a young stellar cluster as a part of COUP (Chandra Orion Ultradeep Project). The Carina Nebula is at a distance of 2.3 kpc and X-ray observations of this region were obtained as part of the Chandra Carina Complex Project (CCCP). Making use of the optical photometry and spectroscopy of three star clusters in Carina — Trumpler 16, Trumpler 14, and Collinder 232 — we cross-matched these sources with CCCP to build our data set. Using the spectral types and distances compiled from the literature, we estimated parameters such as bolometric luminosity, effective temperature, stellar radius, rotation period and infrared excess for these sources. We searched for correlations between observed X-ray properties and stellar properties and accretion/disk tracers to study the characteristics of the X-ray emission in both the nebulae. We note the similarities and differences in the X-ray emission in both the nebulae and discuss the causes of differences and the probable origin of X-ray emission in low-mass young stars. |