Transient double-peaked line emission as signatures of accretion events around supermassive black holes
Author
dc.contributor.author
Storchi-Bergmann, Thaisa
Author
dc.contributor.author
Ruiz González, María Teresa
Author
dc.contributor.author
Eracleous, Michael
Admission date
dc.date.accessioned
2018-12-20T14:38:04Z
Available date
dc.date.available
2018-12-20T14:38:04Z
Publication date
dc.date.issued
1998
Cita de ítem
dc.identifier.citation
Advances in Space Research, Volumen 21, Issue 1-2, 2018, Pages 47-56
Identifier
dc.identifier.issn
02731177
Identifier
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10.1016/S0273-1177(97)00613-3
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/156792
Abstract
dc.description.abstract
We discuss the recent appearance of very broad (FWZI∼20000 km s-1) double-peaked Balmer emission lines in the nuclei of the galaxies NGC 1097, Pictor A and M 81. Such profiles are rare, and only found in about 10% of broad-line radio galaxies. In the most accepted scenario, they are the signature of relativistic gas motions around a supermassive nuclear black hole. We make a parallel between the properties of the above three nuclei: while Pictor A is a radio-galaxy similar to the others where the double-peaked profile is found, NGC 1097 and M 81 are low-luminosity nuclei located in spiral hosts. The latter galaxies nevertheless share the key characteristics of more powerful radio galaxies with double-peaked lines: narrow emission-line ratios typical of LINERs, double-peaked Balmer lines which are on average twice as broad as those of typical radio loud AGN and the presence of jets. These properties suggest that low-luminosity LINERs harbor similar nuclear engines as the most luminous a