The End of the White Dwarf Cooling Sequence in M4: an efficient approach
Astrophysics of Galaxies
2011-02-11 v1
Abstract
We use 14 orbits of ACS observations to reach the end of the white-dwarf cooling sequence in the globular cluster M4. Our photometry and completeness tests show that the end is located at magnitude m_F606W = 28.5+/-0.1, which implies an age of 11.6+/-0.6 Gyr (internal errors only). This is consistent with the age from fits to the main sequence turn-off (12.0+/-1.4 Gyr).
Keywords
Cite
@article{arxiv.0903.2839,
title = {The End of the White Dwarf Cooling Sequence in M4: an efficient approach},
author = {L. R. Bedin and M. Salaris and G. Piotto and J. Anderson and I. R. King and S. Cassisi},
journal= {arXiv preprint arXiv:0903.2839},
year = {2011}
}
Comments
37 pages, 13 figures (4 in low resolution), 1 table, 2 years of work. ApJ accepted on March 13, 2009