Consequences of a possible jet-star interaction in the inner central parsec of Centaurus A
| dc.contributor.author | Müller, C. | |
| dc.contributor.author | Kadler, M. | |
| dc.contributor.author | Mannheim, K. | |
| dc.contributor.author | Perucho, M. | |
| dc.contributor.author | Ojha, R. | |
| dc.contributor.author | Ros, E. | |
| dc.contributor.author | Schulza, R. | |
| dc.contributor.author | Wilms, J. | |
| dc.date.accessioned | 2020-03-30T15:29:09Z | |
| dc.date.available | 2020-03-30T15:29:09Z | |
| dc.description.abstract | The jet-counterjet system of the closest radio-loud active galaxy Centaurus A (Cen A) can be studied with Very Long Baseline Interferometry (VLBI) on unprecedented small linear scales of ∼ 0.018 pc. These high-resolution observations provide essential information on jet emission and propagation within the inner parsec of an AGN jet. We present the results of a kinematic study performed within the framework of the Southern-hemisphere AGN monitoring program TANAMI. Over 3.5 years, the evolution of the central-parsec jet structure of Cen A was monitored with VLBI. These observations reveal complex jet dynamics which are well explained by a spine-sheath structure supported by the downstream acceleration occurring where the jet becomes optically thin. Both moving and stationary jet features are tracked. A persistent local minimum in surface brightness suggests the presence of an obstacle interrupting the jet flow, which can be explained by the interaction of the jet with a star at a distance of ∼ 0.4 pc from the central black hole. We briefly discuss possible implications of such an interaction regarding the expected neutrino and high-energy emission and the effect on a putative planet | en_US |
| dc.description.sponsorship | C.M. and R.S. wish to thank RadioNet3 for support to attend this meeting. C.M. acknowledges the support of the Bundesministerium für Wirtschaft und Technologie (BMWi) through Deutsches Zentrum für Luft- und Raumfahrt (DLR) grant 50 OR 1404. E.R. was partially supported by the Spanish MINECO project AYA2012-38491-C02-01 and by the Generalitat Valenciana project PROMETEOII/2014/057. M.P. is a member of the work team of projects AYA2013-40979-P and AYA2013-48226-C3-2-P, funded by the Spanish Ministerio de Economìa y Competitividad (MINECO), and PROMETEOII/2014/069, funded by Generalitat Valenciana. We acknowledge the COST MP0905 action ‘Black Holes in a Violent Universe’. | en_US |
| dc.description.uri | https://pos.sissa.it/230/024/pdf | en_US |
| dc.format.extent | 6 pages | en_US |
| dc.genre | conference paper and proceedings | en_US |
| dc.identifier | doi:10.13016/m2ezp0-ecwi | |
| dc.identifier.citation | C. Müller , M. Kadlera , K. Mannheim , M. Perucho , R. Ojha , E. Ros, R. Schulz , J. Wilms,Consequences of a possible jet-star interaction in the inner central parsec of Centaurus A,https://pos.sissa.it/230/024/pdf | en_US |
| dc.identifier.uri | http://hdl.handle.net/11603/17762 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Proceedings of Science (POS) | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Physics Department Collection | |
| dc.relation.ispartof | UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II) | |
| dc.relation.ispartof | UMBC Faculty Collection | |
| dc.rights | This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. | |
| dc.rights | Attribution-NonCommercial-NoDerivs 3.0 United States | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/us/ | * |
| dc.title | Consequences of a possible jet-star interaction in the inner central parsec of Centaurus A | en_US |
| dc.type | Text | en_US |