Correlation patterns between 11 diffuse interstellar bands and ultraviolet extinction

Details Correlation patterns between 11 diffuse interstellar bands and ultraviolet extinction Correlation patterns between 11 diffuse interstellar bands and ultraviolet extinction

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005mnras.358..563m&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 358, Issue 2, pp. 563-571.

Astronomy and Astrophysics

Astronomy

13

Dust, Extinction, Ism: Molecules

Scientific paper

We relate the equivalent widths of 11 diffuse interstellar bands, measured in the spectra of 49 stars, to different colour excesses in the ultraviolet. We find that most of the observed bands correlate positively with the extinction in the neighbourhood of the 2175-Åbump. Correlation with colour excesses in other parts of the extinction curve is more variable from one diffuse interstellar band to another; we find that some diffuse bands (5797, 5850 and 6376 Å) correlate positively with the overall slope of the extinction curve, while others (5780 and 6284 Å) exhibit negative correlation. We discuss the implications of these results on the links between the diffuse interstellar band carriers and the properties of the interstellar grains.

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