A search for forbidden O III emission in the central part of the X-ray globular cluster M15

Details A search for forbidden O III emission in the central part of the X-ray globular cluster M15 A search for forbidden O III emission in the central part of the X-ray globular cluster M15

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....63..341a&link_type=abstract

Astronomy and Astrophysics, vol. 63, no. 3, Feb. 1978, p. 341-344.

Astronomy and Astrophysics

Astrophysics

9

Forbidden Transitions, Globular Clusters, Oxygen Spectra, X Ray Sources, Emission Spectra, High Resolution, Isophotes, Lallemand Cameras, Planetary Nebulae

Scientific paper

To detect unambiguously gas in globular-cluster centers a search has been made for emission in the 5007-A line of forbidden O III. To reach sufficient spatial resolution images were obtained at the f/15 Cassegrain focus of a 106-cm reflector. A photometric study using an electronic camera has been performed for the X-ray globular cluster M15. Outside of the well-known K 648, no forbidden O III emission has been detected, so that the discovery by Peterson (1976) of a second planetary nebula in the core of M15 cannot be confirmed. Upper limits are given for the forbidden O III emission.

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