Further evidence for localized extended red emission in NGC 7023

Details Further evidence for localized extended red emission in NGC 7023 Further evidence for localized extended red emission in NGC 7023

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.252..229w&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 252, Sept. 15, 1991, p. 229-233. Research supported by

Astronomy and Astrophysics

Astronomy

13

Astronomical Polarimetry, Emission Spectra, Near Infrared Radiation, Reflection Nebulae, Astronomical Spectroscopy, Optical Polarization, Stellar Color

Scientific paper

Imaging polarimetry of the reflection nebula NGC 7023 in BVRI wavebands show there are localized regions within the nebula where the levels of polarization at R and I are significantly reduced relative to those at B and V. In these regions there appears to be broadband R-NIR emission which dilutes the scattered radiation to create the reduced levels of polarization. This emission may be extended red emission, and arises from one component of the grains which scatter the central starlight to produce the reflection nebula. In the R and I wavebands this emission is about 15-20 percent of the total light coming from the selected regions of the nebula.

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