Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1970
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970ap%26ss...6..157r&link_type=abstract
Astrophysics and Space Science, Volume 6, Issue 1, pp.157-160
Astronomy and Astrophysics
Astrophysics
8
Scientific paper
Equivalent widths, as published by Seddon, for the diffuse interstellar absorption band at λ6180 are compared with photoelectric λ4430 indices for ten stars in the northern Milky Way. The intensity ratio is found to depend on galactic longitude in a way similar to that found by Johnson for the ratioA V /E B-V of total to selective interstellar absorption. The dependence found, combined with deductions from a tentative identification of the bands as due to negative hydrogen, points to a direction for the galactic magnetic field that is in better agreement with the direction derived from rotation measures of extragalactic sources than with that based on the dust-hypothesis interpretation of interstellar optical polarization.
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