Interstellar extinction - A calibration by planetary nebulae

Details Interstellar extinction - A calibration by planetary nebulae Interstellar extinction - A calibration by planetary nebulae

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976aj.....81..407c&link_type=abstract

Astronomical Journal, vol. 81, June 1976, p. 407-418.

Astronomy and Astrophysics

Astronomy

68

Absorption Spectra, H Beta Line, Interstellar Extinction, Planetary Nebulae, Tables (Data), Balmer Series, Electron Density (Concentration), Electron Energy, Forbidden Bands, Galactic Structure, Temperature Effects

Scientific paper

From currently available data, a catalog of temperature-dependent absolute H-beta extinctions and distances of planetary nebula has been prepared. These data have been used to transform FitzGerald's (1968) three-dimensional color-excess distribution to one in absolute absorption at the frequency of H-beta (4861 A). The resulting absorption distribution is adequate to calculate the observed planetary extinctions. It also provides a basis for calculating stellar distances independently of the ratio of total-to-selective absorption. Such calculations lead to a value of this ratio for each object studied.

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