The Planetary Nebula K648 in the Globular Cluster M15

Details The Planetary Nebula K648 in the Globular Cluster M15 The Planetary Nebula K648 in the Globular Cluster M15

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003hst..prop.9826b&link_type=abstract

HST Proposal ID #9826

Computer Science

Hst Proposal Id #9826 Hot Stars

Scientific paper

We propose STIS spatially resolved UV spectra {long slit}, and echelle UV spectra, of the Planetary Nebula {PN} K648 in M15, one of the few PN known in globular clusters. The data will provide two crucial tests to clarify the still elusive nature of this object, in particular whether it evolved from a coalesced binary {Bianchi et al. 2001}. Such a result would have general implications for better understanding the evolution of close binaries {common envelope phase}, especially important in the globular cluster environment, and the formation of bi-polar nebulae. We will try to reveal the presence {and dimensions} of a disk surrounding the central star by modeling the high resolution profile of the CIV wind line. The stellar parameters {and possible disk presence} can be constrained only by the requested STIS spectra. Complementary FUSE spectra in the far-UV {905-1187A} will be analysed concurrently, to derive the circumstellar molecular and neutral hydrogen, and the extinction.

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