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Quasi-periodic oscillations in X-ray emission from the Seyfert galaxy NGC5548
- Source :
- Nature. Jan 21, 1993, Vol. 361 Issue 6409, p233, 4 p.
- Publication Year :
- 1993
-
Abstract
- Seyfert galaxy NGC5548 emits X-rays in quasi-periodic oscillations (QPOs). Analysis of data obtained by the Exosat satellite shows that NGC5548 is the first object with an active galactic nuclei (AGN) known to produce X-ray QPOs. Similar findings from compact galaxy X-ray binaries indicate that QPOs result from material being absorbed within a dense object, probably a black hole. However, the low estimated mass for the black hole that may exist within NGC5548's AGN may be hard to reconcile with current theories of AGN structure.
Details
- ISSN :
- 00280836
- Volume :
- 361
- Issue :
- 6409
- Database :
- Gale General OneFile
- Journal :
- Nature
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.13444614