The Puzzling Frequencies of CEMP and NEMP Stars

Abstract

We present the results of binary population simulations of carbon- and nitrogen-enhanced metal-poor (CEMP and NEMP) stars. We show that the observed paucity of very nitrogen-rich stars puts strong constraints on possible modifications of the initial mass function at low metallicity.

3 pages, contribution to "The Origin of the Elements Heavier than Iron" in honor of the 70th birthday of Roberto Gallino, Torino, Italy, September 2008

References in corpus (7)

• Carbon Enhanced Metal-Poor Stars. I. Chemical Compositions of 26 Stars
• The Stellar Abundances for Galactic Archeology (SAGA) Database - Compilation of the Characteristics of Known Extremely Metal-Poor Stars
• Stellar Models and Yields of Asymptotic Giant Branch Stars
• The Frequency of Carbon-Enhanced Metal-Poor Stars in the Galaxy from the HERES sample
• Bright Metal-Poor Stars from the Hamburg/ESO Survey. I. Selection and Follow-up Observations from 329 Fields
• The Origin of Carbon-Enhancement and Initial Mass Function of Extremely Metal-Poor Stars in the Galactic Halo
• A Search for Nitrogen-Enhanced Metal-Poor Stars

Cited by in corpus (5)

• The Evolution of Isotope Ratios in the Milky Way Galaxy
• Metal-poor stars observed with the automated planet finder telescope. I. Discovery of five carbon-enhanced metal-poor stars from LAMOST
• Chemical composition of two bright extremely metal-poor stars from the SDSS MARVELS pre-survey
• Thermohaline mixing in extremely metal-poor stars
• A new model for the origin of very metal poor stars and their chemical composition