Quantitative spectroscopy of K648 -- the PNN of Ps1 in the globular cluster M15

Details Quantitative spectroscopy of K648 -- the PNN of Ps1 in the globular cluster M15 Quantitative spectroscopy of K648 -- the PNN of Ps1 in the globular cluster M15

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aca....43..337h&link_type=abstract

Acta Astronomica, vol. 43, no. 4, p. 337-342

Astronomy and Astrophysics

Astronomy

13

Astronomical Spectroscopy, Atmospheric Models, Globular Clusters, Planetary Nebulae, Stellar Atmospheres, Stellar Evolution, Stellar Models, Stellar Spectra, Abundance, Carbon, Helium, Hubble Space Telescope, Hydrogen, Light (Visible Radiation), Spectroscopic Analysis, Stellar Composition, Ultraviolet Spectra

Scientific paper

We report preliminary results of a quantitative study of high resolution UV and optical spectra of K648 obtained with the Hubble Space Telescope and the Calar Alto 3.5 m telescope, respectively. Using state of the art NLTE model-atmospheres we determine atmospheric parameters and the abundances of hydrogen, helium and carbon. K648 is found to be helium- and carbon-rich when compared to solar composition.

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