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.
Bibliographical reference

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

Advertised on:
7
2005
Number of authors
10
IAC number of authors
0
Citations
5
Refereed citations
4
Description
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.
Type
Non-refereed

It may interest you

  • Non-refereed
    HARMONI at ELT: HIPOTEC electronics and control system
    HARMONI is the first light visible and near-IR integral field spectrograph for the ELT. It covers a large spectral range from 470nm to 2450nm with resolving powers from 3300 to 18000 and spatial sampling from 60 mas to 4 mas. It can operate in two Adaptive Optics modes - SCAO (including a High Contrast capability) and LTAO - or with NOAO. The
    Menéndez Mendoza, Saúl et al.

    Advertised on:

    7
    2024
    Bibcode
    2024SPIE13096E..4ZM
    Citations
    0
  • Non-refereed
    GTCAO low-frequency tip-tilt offload to M2
    GTCAO is the instrument that implements Adaptive Optics on GTC. For atmospheric turbulence correction, GTCAO uses a deformable mirror. Unlike other AO systems, GTCAO does not include a dedicated mirror for low-frequency tip-tilt (TT) correction. In the absence of dedicated correction, the TT components of atmospheric turbulence are corrected by the
    Marco de la Rosa, J. et al.

    Advertised on:

    8
    2024
    Bibcode
    2024SPIE13097E..7SM
    Citations
    0