A New Method for Determining the Reddenings of Extragalactic Objects
Abstract
Two values of the galactic reddening coefficient A (0.05 and 0.033) are obtained. Attention is given to reconciling the differences, and to the establishment of a more accurate method for determining the reddening of extragalactic objects. Relations among galaxy counts, hydrogen column density, and the reddening of halo objects and external galaxies are presented. It is noted that extinction is patchy and can not be considered as a function of simple latitude or longitude; and that the different estimations of A result primarily from the selection criteria.
- Publication:
-
Astrophysical Letters
- Pub Date:
- 1978
- Bibcode:
- 1978ApL....19...69B
- Keywords:
-
- Astronomical Photometry;
- Astronomical Spectroscopy;
- Extraterrestrial Radiation;
- Interstellar Extinction;
- Galactic Radiation;
- Globular Clusters;
- Stellar Spectrophotometry;
- Ubv Spectra;
- Astrophysics