Narrow-band photometry of Wolf-Rayet stars and planetary nebulae

Details Narrow-band photometry of Wolf-Rayet stars and planetary nebulae Narrow-band photometry of Wolf-Rayet stars and planetary nebulae

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.171..157m&link_type=abstract

(IAU, European Regional Astronomy Meeting, 11th, La Laguna, Spain, July 3-8, 1989) Astrophysics and Space Science (ISSN 0004-640

Astronomy and Astrophysics

Astrophysics

1

Astronomical Photometry, Emission Spectra, Narrowband, Planetary Nebulae, Wolf-Rayet Stars, Argon, H Ii Regions, Helium, Hydrogen

Scientific paper

Observational data are presented in the (16)Lambda(9) Psi(25)-photometric system for 11 Wolf-Rayet stars and 7 planetary nebulae. The results show anomalous alpha(16) Lambda(9)-indices for these emission objects. Six W-R stars show possible variations in the strength of the He II line at 6560 A, perhaps none in the strength of the He I line at 10830 A. In spite of these misconstrued alpha(16) and Lambda(9)-indices, most WC stars are separated from WN stars in the alpha(16) Lambda(9)-array; and PN, in this diagram lie far apart from all kind of stellar objects. The results, yielded by the Psi(25)-index, indicate that the He I and He II lines at 10830 A and 10124 A, respectively, are probably well suited for photometric examination in W-R stars, PN and other peculiar objects.

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