Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-04-27
Astronomy and Astrophysics
Astrophysics
Paper withdrawn after reanalysis of data. Paper no longer available for download
Scientific paper
Space Telescope Imaging Spectrograph (STIS) and archival International Ultraviolet Explorer (IUE) data were used to search for structure in the ultraviolet interstellar extinction curve. Between 1250 and 3200 A, in addition to the well-known 2175 A bump, there is only one fairly small (10%) absorption feature at 2700 A. The feature is very broad (>400 A). It coincides extremely well in position and shape with laboratory measurements of presolar diamond grains found in meteorites. As this feature appears in both the new STIS and archival IUE data, it is unlikely to be an instrumental effect. This feature appears to be ubiquitous in the ISM as it is seen along sightlines toward various clouds with reddenings in the range of E(B-V) = 0.35 to 1.73 mag. The identification with diamonds remains tentative since it is based on a single, weak feature. If the feature is due to interstellar diamonds then they require an order of magnitude more absorption strength per gram/cm^2 than the presolar meteoritic diamonds measured in the lab.
Allamandola Louis J.
Clayton Geoffrey C.
Gordon Karl Douglas
Martin Peter G.
Salama Farid
No associations
LandOfFree
A New Feature in the Interstellar Extinction Curve at 2700 A: Diamonds in the Rough? 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 A New Feature in the Interstellar Extinction Curve at 2700 A: Diamonds in the Rough?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A New Feature in the Interstellar Extinction Curve at 2700 A: Diamonds in the Rough? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-383136