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Simultaneous EUV and X-ray variability of NGC 4051.
- Source :
- Monthly Notices of the Royal Astronomical Society; 3/11/2000, Vol. 312 Issue 4, p880-886, 7p, 4 Graphs
- Publication Year :
- 2000
-
Abstract
- We present a flux variability study of simultaneous RXTE and EUVE observations of the highly variable Seyfert galaxy NGC 4051. We find a strong correlation between variability in the EUV and medium-energy X-ray bands, indicating that both are sampling the same power-law continuum. The lag between the two bands is less than 20 ks and, depending on model assumptions, may be <1 ks. We examine the consequences of such a small lag in the context of simple Comptonization models for the production of the power-law continuum. A lag of <1 ks implies that the size of the Comptonizing region is less than 20 Schwarzschild radii for a black hole of mass >10[sup 6] M[sub ⊙]. [ABSTRACT FROM AUTHOR]
- Subjects :
- GALAXIES
X-ray astronomy
ASTRONOMICAL observations
Subjects
Details
- Language :
- English
- ISSN :
- 00358711
- Volume :
- 312
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Publication Type :
- Academic Journal
- Accession number :
- 5529661
- Full Text :
- https://doi.org/10.1046/j.1365-8711.2000.03266.x