CCD photometry of the young open cluster NGC 1962-65-66-70

• A. Feinstein ^[1] ; W. Seggewiss ^[1] ; R. Vázquez ^[1] ; J.M. Will ^[1]
  1. [1] Collurania Teramo Observatory

     Collurania Teramo Observatory

     Teramo, Italia

     
• Localización: Revista mexicana de astronomía y astrofísica, ISSN-e 0185-1101, Vol. 26, Nº. 1, 1993, págs. 102-102
• Idioma: inglés
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• Resumen

  • The group of stars situated in the region of the nebulosities called NGC 1962-65-66-70 (named also N144) was observed photoelectrically at La Silla in BVRI with a CCD. The analysis of the data indicates that all stars belong to a unique cluster with a main sequence up to Y = 12 mag. The brightest stars are of O spectral type. There are also 2 Wolf-Rayet stars and 2 supergiants of spectral types F and M, respectively. With the distance of the Large Cloud and adjusting the isochrones calculated with mass loss, the age of the group becomes log ¢t = 6.9. Its diameter is of the order of 70 pc, three times the extension of the double cluster h and x Persei.