Very small grain emission in NGC 7023.

Details Very small grain emission in NGC 7023. Very small grain emission in NGC 7023.

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...315l.313l&link_type=abstract

Astronomy and Astrophysics, v.315, p.L313-L316

Astronomy and Astrophysics

Astrophysics

12

Interstellar Medium: Reflection Nebulae: Individual: Ngc 7023, Interstellar Medium: Dust, Extinction, Interstellar Medium: Molecules

Scientific paper

We observed the reflection nebula NGC 7023 at various positions using wide and narrow band photometry centred on the 7.7 and 11.3μm PAH emission features and wide band photometry at 20 and 25μm. No significant variations have been detected over the nebula in the 7.3 and 20μm continuum relative to the total emission in the 6-15μm range (hereafter {GAMMA}). This result supports the hypothesis that most of the continuum emission in both bands come from very small grains. In contrast, the 7.7 and 11.3μm PAH emission features show clear variations. We find that in weaker radiation fields of the nebula the 11.3 and 7.7μm features are not the dominant emission components in the 6-15μm range. The 11.5μm band increases whereas the 11.3μm emission feature decreases relative to {GAMMA} in the outer parts of the nebula. The effect can be explained by increased hydrogenation of PAH molecules.

Affiliated with

Also associated with

No associations

Rating

Very small grain emission in NGC 7023. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Very small grain emission in NGC 7023., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Very small grain emission in NGC 7023. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1145096