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On the location of the supermassive black hole in CTA102

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On the location of the supermassive black hole in CTA102

dc.contributor.author	Fromm, Christian M.
dc.contributor.author	Perucho Pla, Manuel
dc.contributor.author	Ros Ibarra, Eduardo
dc.contributor.author	Savolainen, Tuomas
dc.contributor.author	Zensus, J. Anton
dc.date.accessioned	2015-05-15T10:44:11Z
dc.date.available	2015-05-15T10:44:11Z
dc.date.issued	2015
dc.identifier.citation	Fromm, Christian M. Perucho Pla, Manuel Ros Ibarra, Eduardo Savolainen, Tuomas Zensus, J. Anton 2015 On the location of the supermassive black hole in CTA102 Astronomy and Astrophysics 576 A43 1 4
dc.identifier.uri	http://hdl.handle.net/10550/43877
dc.description.abstract	Context. Relativistic jets in active galactic nuclei are one of the most powerful phenomena in the Universe. They form in the surroundings of the supermassive black holes as a by-product of accretion onto the central black hole in active galaxies. The flow in the jets propagates at velocities close to the speed of light. The distance between the first part of the jet that is visible in radio images (core) and the black hole is still a matter of debate. Aims. Only very-long-baseline interferometry observations resolve the innermost compact regions of the radio jet. These observations can access the jet base, and by combining data at different wavelenghts, address the physical parameters of the outflow from its emission. Methods. We have performed an accurate analysis of the frequency-dependent shift of the VLBI core location for a multi-wavelength set of images of the blazar CTA 102 including data from 6 cm down to 3 mm. Results. The measure of the position of the central black hole, with mass ~10^8.93M_⊙, in the blazar CTA 102 reveals a distance of ~8 × 10^4 gravitational radii to the 86 GHz core, in agreement with similar measures obtained for other blazars and distant radio galaxies, and in contrast with recent results for the case of nearby radio galaxies, which show distances between the black hole and the radio core that can be two orders of magnitude smaller.
dc.language.iso	eng
dc.relation.ispartof	Astronomy and Astrophysics, 2015, vol. 576, num. A43, p. 1-4
dc.subject	Astronomia
dc.subject	Astrofísica
dc.title	On the location of the supermassive black hole in CTA102
dc.type	journal article	es_ES
dc.date.updated	2015-05-15T10:44:11Z
dc.identifier.doi	10.1051/0004-6361/201322836
dc.identifier.idgrec	092413
dc.rights.accessRights	open access	es_ES