Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986inpr.conf..133c&link_type=abstract
In NASA. Ames Research Center Summer School on Interstellar Processes: Abstracts of Contributed Papers p 133-134 (SEE N87-15043
Astronomy and Astrophysics
Astronomy
2
Cosmic Dust, Grain Size, Interstellar Extinction, Polarization (Waves), Size Distribution, Astronomical Netherlands Satellite, Far Ultraviolet Radiation, Magnetic Fields, Visible Spectrum
Scientific paper
Ultraviolet extinction properties of interstellar dust are well observed. The amount of extinction measured in the visible (E(B-V)), at the 2200 A feature (E(BUMP)), and in the far ultraviolet (E(1550-V)) are only vaguely correlated indicating that at least 3 fairly independent populations of grains contribute to the overall extinction curve. A search of literature was made for polarimetric observations of the 1415 stars included in the extinction catalog derived from the Astronomical Netherlands Satellite (ANS) data. It was found that about 900 of the stars had at least one unfiltered polarimetric observation, p (%). In addition, 150 stars had calculated values of lambdamax (wavelength at which maximum polarization occurs). The lambdamax and p/E(B-V) parameters are discussed.
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