SEARCHING FOR PLANETARY NEBULAE IN GLOBULAR CLUSTERS

摘要

Se presentan resultados preliminares de unabusqueda de nebulosas planetarias en ciimulos globulares de la galaxia. Esta biisqueda se realiza obteniendo irnagenes directas con filtros interferenciales en Ha, [0 III] A5007, y continuos adyacentes. Las imagenes, a las que se les sustrae el continuo, se examinan buscando objetos con lineas en emision. Hasta ahora se han examinado 32 cumulos globulares. Con este procedimiento se redescubrieron las dos nebulosas planetarias conocidas previamente: K648 en M15 y GJJC-1 en M22 pero ninguna otra planetaria ha sido detectado. Se discute este resultado. Preliminary results of a survey for planetary nebulae in galactic globular clusters are presented. Direct imaging with narrow Ha, [O III] A5007 and adjacent continuum niters are obtained. Continuum-subtracted images are analyzed in order to detect emission line objects. At present, 32 globular clusters have been observed. The previously known planetary nebulae K648 in M15 and GJJC-1 in M22 were easily re-discovered, but no other planetary nebula has been detected so far. The apparent lack of planetary nebulae in globular clusters is discussed.