The extended red emission filaments in NGC 2023

Details The extended red emission filaments in NGC 2023 The extended red emission filaments in NGC 2023

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...347l..25w&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 347, Dec. 1, 1989, p. L25-L27.

Astronomy and Astrophysics

Astrophysics

31

Emission Spectra, Reflection Nebulae, Stellar Spectrophotometry, Brightness Distribution, Hydrocarbons, Photodissociation

Scientific paper

Using the photographic unsharp masking technique and image cancellation, the high-frequency surface brightness fluctuations in the reflection nebula NGC 2023 have been imaged over 406 arcsec x 510 arcsec field. Maps with 1 arcsec resolution, centered on the illuminating star HD 37903, are presented for the photometric B and R bands. A system of narrow filamentary structures observable only in the R band are identified as extended red emission (ERE) features. These features are not associated with any apparent density enhancements in the nebula. Arguments are presented which link the ERE filaments to regions within the nebula where photodissociation of molecular hydrogen occurs.

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