The White Dwarf Population of Messier 34 (NGC 1039)
American Astronomical Society Meeting Abstracts
We present observations of the white dwarf population of M34 (NGC 1039), an intermediate-age ( ̃ 250 Myr) open cluster with a turnoff mass of ̃ 4 M☉. White dwarfs in this cluster therefore will fill a current gap in the empirical initial-final mass relation, white dwarfs with initial masses between 4M☉ and 5M☉, a region where some theoretical models predict a change in slope to the relation. Wide-field photometry of the cluster core and two flanking fields is presented. High signal-to-noise spectroscopy from the Keck 10m telescope is used to determine the mass and cooling age of each white dwarf, from which the progenitor mass is determined. We present the revised empirical initial-final mass relation, focusing on the slope and scatter. We also present results from a study in the flanking fields of white dwarf evaporation from the cluster. This work is funded through grant AST-0307492 from the National Science Foundation.
Physics and Astronomy
Williams, Kurtis A.; Rubin, K.; and Bolte, M., "The White Dwarf Population of Messier 34 (NGC 1039)" (2005). Faculty Publications. 166.