The Discovery of More than 2000 White Dwarfs in the Globular Cluster ω Centauri

Bibcode
2005ApJ...621L.117M
DOI
10.1086/429255
Monelli, M.; Corsi, C. E.; Castellani, V.; Ferraro, I.; Iannicola, G.; Prada Moroni, P. G.; Bono, G.; Buonanno, R.; Calamida, A.; Freyhammer, L. M.; Pulone, L.; Stetson, P. B.
Referencia bibliográfica

The Astrophysical Journal, Volume 621, Issue 2, pp. L117-L120.

Fecha de publicación:
3
2005
Revista
The Astrophysical Journal
Número de autores
12
Número de autores del IAC
0
Número de citas
29
Número de citas referidas
20
Descripción
We present deep multiband (F435W, F625W, and F658N) photometric data of the globular cluster ω Cen collected with the Advanced Camera for Surveys on board the Hubble Space Telescope. We identified in the (F435W - F625W, F435W)-plane more than 2000 white dwarf (WD) candidates using three out of nine available pointings. Such a large sample appears to be in agreement with predictions based on the ratio between WD and horizontal-branch evolutionary lifetimes. We also detected ~1600 WDs in the (F658N - F625W, F625W)-plane, supporting the evidence that a large fraction of current cluster WDs are Hα-bright. Based on observations collected with the Advanced Camera for Surveys on board the Hubble Space Telescope.
Tipo
Con árbitro

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