Profile of the Unidentified Interstellar Absorption Band at 4430 Å at Different Galactic Longitudes

Other

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

17

Scientific paper

THE cause of the diffuse interstellar absorption band centred on 4430 Å is still unknown, thirty years after the recognition of the band's interstellar nature. Because this band, together with other similar bands, can absorb as much visible energy from the radiation of distant stars as is absorbed by the visible Balmer lines, an identification is of obvious interest, and such identification may be critically dependent on a knowledge of the profile of the band. Investigation of the profile is made difficult by its great width and usually small depth. Wilson1, Wampler2 and Herbig3 have produced profiles of 4430 Å in the distant B-star H.D. 183143; these profiles resemble each other at the centre but differ further out in that Wilson finds shallow wings of perhaps even 150 Å width, whereas the overall extents in the other two cases are about 40 Å and 60 Å, the shallow wings being absent.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Profile of the Unidentified Interstellar Absorption Band at 4430 Å at Different Galactic Longitudes 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 Profile of the Unidentified Interstellar Absorption Band at 4430 Å at Different Galactic Longitudes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Profile of the Unidentified Interstellar Absorption Band at 4430 Å at Different Galactic Longitudes will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1866166

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.