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A study of absorption and reddening using absolute magnitudes and colors of galaxies


Peterson, Bruce Alrick (1969) A study of absorption and reddening using absolute magnitudes and colors of galaxies. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/7WK7-V137.


NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document.

For the brightest galaxy in each of 48 nearby clusters and 7 groups of galaxies, photoelectric measurements of V and V-r magnitudes have been made. Redshifts have been measured for those 39 clusters and 3 groups which did not have previously published redshifts. Absolute magnitudes and colors were calculated for each cluster, and the cscb dependence of the absolute magnitudes and colors was attributed to galactic absorption.

After correcting for selection effects, the ratio of total to selective absorption was found to be [...]=3.9 which is consistent with [...]=3.0. The values found for the color-excess and absorption at the galactic pole are [...]=0.016 and [...]=0.06. This value for the color-excess is in agreement with [...]=0.03 found by Sturch for the RR Lyrae stars.

Item Type:Thesis (Dissertation (Ph.D.))
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Astronomy
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Schmidt, Maarten
Group:Astronomy Department
Thesis Committee:
  • Unknown, Unknown
Defense Date:21 October 1968
Record Number:CaltechETD:etd-05012008-091134
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1564
Deposited By: Imported from ETD-db
Deposited On:13 May 2008
Last Modified:21 Dec 2019 04:53

Thesis Files

PDF (Peterson_ba_1969.pdf) - Final Version
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