The HST large programme on NGC 6752 - III. Detection of the peak of the white dwarf luminosity function
Date Issued
2019
Author(s)
•
Salaris, M.
•
Anderson, J.
•
Libralato, M.
•
Apai, D.
•
Nardiello, D.
•
Rich, R. M.
•
Bellini, A.
•
Dieball, A.
•
Bergeron, P.
•
Burgasser, A. J.
•
Milone, A. P.
•
Abstract
We report on the white dwarf (WD) cooling sequence of the old globular cluster NGC 6752, which is chemically complex and hosts a blue horizontal branch. This is one of the last globular cluster WD cooling sequences accessible to imaging by the Hubble Space Telescope. Our photometry and completeness tests show that we have reached the peak of the luminosity function of the WD cooling sequence, at a magnitude mF606W = 29.4 ± 0.1, which is consistent with a formal age of ∼14 Gyr. This age is also consistent with the age from fits to the main-sequence turn-off (13-14 Gyr), reinforcing our conclusion that we observe the expected accumulation of WDs along the cooling sequence.
Volume
488
Issue
3
Start page
3857
Issn Identifier
0035-8711
Ads BibCode
2019MNRAS.488.3857B
Rights
open.access
File(s)![Thumbnail Image]()
Loading...
Name
stz1968.pdf
Description
Pdf editoriale
Size
3.67 MB
Format
Adobe PDF
Checksum (MD5)
71e802ec5076592e3f6b705193efc266