Speaker
Ms
Kaitlin Rasmussen
(University of Notre Dame)
Description
We investigate the distribution of stellar carbon abundances in the early Universe and propose a scenario that includes primary carbon production by the massive first-generation stars, recorded in the atmospheres of CEMP-no stars (which show no over-abundances of neutron-capture elements), and secondary carbon production by subsequent generations of AGB stars, recorded in the subset of mass-transfer binaries now observed as CEMP-$s$ stars (which exhibit strong over-abundances of neutron-capture elements). Additionally, we investigate the contrasting behavior of CEMP stars with their more metal-rich counterparts, focusing on their kinematics, spatial distribution, and elemental abundances, in order to constrain the chemo-dynamical history of the Galaxy, from the earliest stars to the present.
References:
Placco, V. M., et al. (2016), ApJ, 833, 21
Yoon, J., et al. (2016), ApJ, 833, 20
This work received partial support from PHY 14-30152; Physics Frontier Center/JINA Center for the Evolution of the Elements (JINA-CEE), awarded by the US National Science Foundation.
Primary author
Ms
Kaitlin Rasmussen
(University of Notre Dame)
Co-authors
Mr
Devin Whitten
(University of Notre Dame)
Prof.
Timothy Beers
(University of Notre Dame)
Dr
Vinicius Placco
(University of Notre Dame)