The extinction constants for galactic planetary nebulae

Details The extinction constants for galactic planetary nebulae The extinction constants for galactic planetary nebulae

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26as...95..337t&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 95, no. 2, p. 337-354.

Astronomy and Astrophysics

Astronomy

71

Interstellar Extinction, Planetary Nebulae, Balmer Series, Charge Coupled Devices, H Beta Line, Radio Astronomy, Stellar Spectrophotometry, Very Large Array (Vla)

Scientific paper

The extinction constants are determined from Balmer decrement measurements for over 900 planetary nebulae. Comparison with published extinction constants shows that the results from ESO are fairly reliable. An analysis of the extinction constants derived from the Balmer decrement and from the radio/Hβ flux ratio indicates that the latter tends to be systematically smaller than the former for increasing extinction. We suggest that the radio measurements of Pottasch's group probably underestimate the radio fluxes, at least for some (faintest) objects.

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