An analysis on the shapes of ultraviolet extinction curves. I - The 2175 A bump

Details An analysis on the shapes of ultraviolet extinction curves. I - The 2175 A bump An analysis on the shapes of ultraviolet extinction curves. I - The 2175 A bump

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...307..286f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 307, Aug. 1, 1986, p. 286-294.

Astronomy and Astrophysics

Astrophysics

199

Interstellar Extinction, Interstellar Matter, Ultraviolet Spectra, Iue, Line Spectra, Milky Way Galaxy, Random Errors

Scientific paper

IUE data are used to investigate the properties of the 2175 A interstellar extinction bump toward 45 reddened Milky Way stars. Using analytic fitting functions, parameters are derived which describe the central position, FWHM, and strength of the bump. The bump position is very stable, with an extreme deviation which is still significantly larger than the measurement uncertainty, indicating true variability. The bump FWHM has a large range of intrinsic values, 0.77/micron to 1.25/micron. The normalized bump strength varies by more than a factor of three. There are no convincing correlations among the three bump parameters, but the width of the bump is strongly correlated with the dust grain environments. Dense quiescent regions yield broad bumps, while diffuse interstellar medium and regions of recent star formation yield narrower bumps. The absence of any correlation between bump width and central position argues strongly against graphite grains in the size range prescribed by the Mathis, Rumpl, and Nordsieck (1977) model as carriers of the bump.

Affiliated with

Also associated with

No associations

Rating

An analysis on the shapes of ultraviolet extinction curves. I - The 2175 A bump 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 An analysis on the shapes of ultraviolet extinction curves. I - The 2175 A bump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An analysis on the shapes of ultraviolet extinction curves. I - The 2175 A bump will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-891785