Physics
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004phdt.........7m&link_type=abstract
Thesis (PhD). BRIGHAM YOUNG UNIVERSITY, Source DAI-B 65/04, p. 1909, Oct 2004, 107 pages.
Physics
Scientific paper
A new photometry technique is developed for the detection of small-amplitude optical variability in galactic nuclei. This technique utilizes the surface brightness profiles of galaxies and checks for nuclear variations by matching up the bulge profiles (assumed to be constant). With this method optical variability is measured down to two hundredths of a magnitude. The method is tested on the following six galaxies using a B-Johnson and an R- Cousins filter: M51, M101, M81, M94, NGC4395, and NGC3982. These galaxies constitute a sampling of normal, LINER, and Seyfert galaxies. Although normal and LINER galaxies are thought to have no optical variability in their nucleus, our study concludes that most galaxies show some optical variability over the timescales of months and years. A study on deconvolution is also carried out as a possible way to improve the new technique. However, none of the tested algorithms improved the ability to detect small-amplitude nuclear variations down to hundredths of a magnitude.
No associations
LandOfFree
Detection of small-amplitude optical variability in galactic nuclei does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Detection of small-amplitude optical variability in galactic nuclei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of small-amplitude optical variability in galactic nuclei will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1638747