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Microvariability in Seyfert galaxies

Astronomical Journal

By:
, , and
DOI: 10.1086/373930

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Abstract

We present the results of a search for microvariability in a sample of eight Seyfert galaxies. Microvariability (i.e., variations occurring on timescales of tens of minutes to hours) has been conclusively demonstrated to exist in the class of active galactic nuclei (AGNs) known as blazars. Its existence in other classes of AGNs is far less certain. We present the results of a study of eight Seyfert 1 galaxies, which were intensively monitored in order to determine whether such variations exist in these objects. Only one object, Ark 120, displayed any evidence of microvariations. The implications of these results with respect to current models of the mechanisms responsible for the observed emission in Seyfert galaxies are discussed. We compare our results with those obtained from other studies of microvariability in different classes of AGNs.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Microvariability in Seyfert galaxies
Series title:
Astronomical Journal
DOI:
10.1086/373930
Volume
125
Issue:
4 1768
Year Published:
2003
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Astronomical Journal
First page:
1811
Last page:
1816