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The Oosterhoff types of the Fornax dSph Globular Clusters

  • C. Greco (a1) (a2), G. Clementini (a1), M. Catelan (a3), E. Poretti (a4), E. V. Held (a5), M. Gullieuszik (a6), M. Maio (a1), A. Rest (a7), N. De Lee (a8), H. A. Smith (a8) and B. J. Pritzl (a9)...

Abstract

We have applied the Image Subtraction to B,V time-series photometry of four globular clusters of the Fornax dwarf spheoridal galaxy, which were observed with the 2.2m ESO-MPI, the 6.5m Magellan/Clay, the 4m CTIO/Blanco telescopes and the WFPC2 on board of HST. We have identified RR Lyrae stars and obtained well sampled light curves for the clusters' variables. From the periods and pulsation properties of their RR Lyrae stars Fornax globular clusters seem to be of Oosterhoff intermediate type.

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References

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Alard, C. 2000, A&AS 144, 363
Greco, C., Clementini, G., Catelan, M. et al. 2007, ApJ submitted
Mackey, A.D. & Gilmore, G.F. 2003, MNRAS 345, 747
Oosterhoff, P.Th. 1939, Observatory 62, 104
Stetson, P.B. 1994, PASP 106, 250
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The Oosterhoff types of the Fornax dSph Globular Clusters

  • C. Greco (a1) (a2), G. Clementini (a1), M. Catelan (a3), E. Poretti (a4), E. V. Held (a5), M. Gullieuszik (a6), M. Maio (a1), A. Rest (a7), N. De Lee (a8), H. A. Smith (a8) and B. J. Pritzl (a9)...

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