Abstract Details
| Name: Susmitha Rani Antony Affiliation: Indian Institute of Astrophysics Conference ID: ASI2016_653 Title : Oxygen abundances in carbon enhance metal poor (CEMP) stars: Comparison between CO and [OI] lines Authors and Co-Authors : Sivarani, T. -IIA Bangalore Ninan, J. P - TIFR, Mumbai Ojha, D.K- TIFR, Mumbai Giridhar, Sunetra- IIA Bangalore HESP team- IIA bangalore Abstract Type : Oral Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : Carbon enhanced metal poor stars are metal poor stars with [Fe/H] < -2.0 and [C/Fe] > 1.0. The origin of carbon in these stars are either due to binary mass transfer from an AGB companion or from an ISM polluted by faint early supernovae that went through mixing and fall back. Oxygen is one of the key elements that help to differentiate between these two scenario and also to probe the masses of the AGB companion. However, oxygen abundance in these are notoriously difficult due to the faint [OI] line at 6300Ang. The CO lines in the NIR spectra provides a practical solution to derive oxygen abundance in CEMP stars. In this work we compare oxygen abundances derived from CO lines using TIRSPEC and [OI] 6300Ang lines using HESP instruments on the 2m HCT. |