The End of the White Dwarf Cooling Sequence in M4: an efficient approach

Details The End of the White Dwarf Cooling Sequence in M4: an efficient approach The End of the White Dwarf Cooling Sequence in M4: an efficient approach

2009-03-16

arxiv.org/abs/0903.2839v1

Astrophys.J.697:965-979,2009

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

37 pages, 13 figures (4 in low resolution), 1 table, 2 years of work. ApJ accepted on March 13, 2009

Scientific paper

10.1088/0004-637X/697/2/965

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).

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