Interstellar reddening for planetary nebulae toward Galactic bulge.

Details Interstellar reddening for planetary nebulae toward Galactic bulge. Interstellar reddening for planetary nebulae toward Galactic bulge.

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996chjph..34.1113b&link_type=abstract

Chin. J. Phys., Vol. 34, No. 4, p. 1113 - 1128

Physics

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Interstellar Reddening: Galactic Bulge, Interstellar Reddening: Planetary Nebulae

Scientific paper

Spectrophotometric data for six planetary nebulae in the direction of the Galactic bulge were used to derive the properties of the interstellar reddening for this region. The observed nebular continuum was compared with theoretically predicted nebular continuum and the interstellar reddening was evaluated from the differences. The derived reddening function for each nebula shows generally good agreement with the Whitford reddening law in long wavelengths of the visible region. However, there exist significant deviations from the standard law in the ultraviolet, which may be explained by either different composition or different size distribution of the dust grains lying toward the Galactic center. A rough estimate suggests R = 1.5 ≡ 2.0, which is significantly smaller than the standard value of R = 3.

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