Internal visual extinction in Planetary Nebulae

Details Internal visual extinction in Planetary Nebulae Internal visual extinction in Planetary Nebulae

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...336..986p&link_type=abstract

Astronomy and Astrophysics, v.336, p.986-990 (1998)

Astronomy and Astrophysics

Astrophysics

3

Dust, Extinction, Planetary Nebulae, Survey

Scientific paper

Except for a very few planetary nebulae, it is usually assumed that intrinsic extinction in such sources is comparatively small, and may be ignored. Such an assumption underpins all previous estimates of nebular distance employing the so-called ``extinction" method. We here suggest that extinction may in fact be appreciable for sources having radii R < 0.1 pc, and rise to C ~ 2 where R = 8 10(-3) pc. Such trends are shown to be in reasonable agreement with a simple model of nebular extinction.

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