White Dwarfs in ω Centauri: Preliminary Evidence

Bibcode
2005ASPC..334...55B
Bono, G.; Monelli, M.; Stetson, P. B.; Prada Moroni, P. G.; Buonanno, R.; Calamida, A.; Ferraro, I.; Iannicola, G.; Corsi, C. E.; Pulone, L.
Referencia bibliográfica

14th European Workshop on White Dwarfs, ASP Conference Series, Vol. 334 Proceedings of a meeting held at Kiel, July 19-23, 2004. Edited by D. Koester and S. Moehler. San Francisco: Astronomical Society of the Pacific, 2005, p.55

Fecha de publicación:
7
2005
Número de autores
10
Número de autores del IAC
0
Número de citas
5
Número de citas referidas
4
Descripción
We present accurate and deep multiband B,R,Hα data for the globular cluster ω Cen collected with the Advanced Camera for Surveys on HST. The photometric catalogue includes more than one million stars. By adopting severe selection criteria we identified more than 600 bona fide White Dwarfs (WDs). Empirical evidence suggests that a small sample of WDs are Hα-bright. The comparison between WD isochrones and observations shows a reasonable agreement at fainter magnitudes and a mismatch at the brighter ones.
Tipo
Sin árbitro

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