Interstellar Absorption in the North Equatorial Polar Region.
Abstract
The interstellar reddening to moderately distant stars in the region north of declination +80 has been measured to obtain an independent determination of the reddening of NGC 188 U, B, V photometry and spectral types yielded an average color excess, EB-v, of 0 09 mag for 27 stars at a mean distance of 580 parsecs. This is in excellent agreement with previous results on the north polar region by Keenan and Babcock Mter an uncertain extrapolation to outside the galaxy, the reddening becomes 0 14 mag., which is somewhat less than the 0 19 mag predicted from galaxy counts However, the measured reddening shows a large amount of scatter, even for stars that are close together The resulting uncertain determination of the reddening of NGC 188 does not contradict Sandage's value.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- September 1962
- DOI:
- 10.1086/147389
- Bibcode:
- 1962ApJ...136..363A