Space Reddening in the Galaxy.

Abstract

view Abstract Citations (29) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Space Reddening in the Galaxy. Stebbins, Joel ; Huffer, C. M. ; Whitford, A. E. Abstract The space reddening was determined from the colors of 1332 B stars measured photo- electrically at Madison and Mount Wilson. From spectrophotometric measures of reddened B stars the selective absorption varies approximately as X-'. On the basis cf this law the total visual and photographic absorptions are, respectively, seven and nine times the color excess. When allowance is made for interstellar absorption, the early B stars are found to be intrinsically nearly i mag. brighter than previously assumed. The correlation between color excess and the intensities of interstellar lines is as close as the correlation between the intensities of the different lines in the same stars. The reddest B stars are all near the galactic circle, and there are more of them toward the center than toward the anticenter of the galaxy. Near the center there is more absorption on the north side than on the south side of the galactic circle. The B stars in several bright clouds are all slightly colored, showing that even the brightest parts of the Milky Way are affected by absorption. The absorption near the sun is given by the colors of bright B stars and of A stars near the north pole of rotation. The absorption near the pole at less than 300 parsecs is confirmed. In general the absorbing clouds are near the galactic plane, but they are so irregular in distribution that the conception of a uniform layer with a constant coefficient of absorption is no longer tenable Publication: The Astrophysical Journal Pub Date: September 1939 DOI: 10.1086/144099 Bibcode: 1939ApJ....90..209S full text sources ADS |