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Original title:
Polarization properties of bow shock sources close to the Galactic centre
Authors: Zajaček, M. ; Karas, Vladimír ; Hosseini, E. ; Eckart, A. ; Shahzamanian, B. ; Valencia-S, M. ; Peissker, F. ; Busch, G. ; Britzen, S. ; Zensus, J. A.
Document type: Papers
Conference/Event: RAGtime /17.-19./, Opava (CZ), 20151117
Year: 2017
Language: eng
Abstract: Several bow shock sources were detected and resolved in the innermost parsec from the supermassive black hole in the Galactic centre. They show several distinct characteristics, including an excess towards mid-infrared wavelengths and a significant linear polarization as well as a characteristic prolonged bow-shock shape. These features give hints about the presence of a non-spherical dusty envelope generated\nby the bow shock. The Dusty S-cluster Object (also denoted as G2) shows similar characteristics and it is a candidate for the closest bow shock with a detected proper motion in the vicinity of Sgr A*, with the pericentre distance of only approx. 2000 Schwarzschild radii. However, in the continuum emission it is a point-like source and hence we use Monte Carlo radiative transfer modeling to reveal its possible three-dimensional structure. Alongside the spectral energy distribution, the detection of polarized continuum emission in the near-infrared Ks-band (2.2 micrometers) puts additional constraints on the geometry of the source.
Keywords: black hole physics – Galaxy: centre –; galaxy centra; radiative transfer
Project no.: 312789, LTI17018, 7E13012 (CEP)
Funding provider: GA MŠk, GA MŠk
Host item entry: Proceedings of RAGtime 17/19: Workshops on black holes and neutron stars, ISBN 9788075102577, ISSN 2336-5668
Institution: Astronomical Institute AS ČR (web)
Document availability information: Fulltext is available at external website.
External URL: http://proceedings.physics.cz/images/proc17/zaj.pdf
Original record: http://hdl.handle.net/11104/0280091
Permalink: http://www.nusl.cz/ntk/nusl-371468
The record appears in these collections:
Research > Institutes ASCR > Astronomical Institute
Conference materials > Papers
Authors: Zajaček, M. ; Karas, Vladimír ; Hosseini, E. ; Eckart, A. ; Shahzamanian, B. ; Valencia-S, M. ; Peissker, F. ; Busch, G. ; Britzen, S. ; Zensus, J. A.
Document type: Papers
Conference/Event: RAGtime /17.-19./, Opava (CZ), 20151117
Year: 2017
Language: eng
Abstract: Several bow shock sources were detected and resolved in the innermost parsec from the supermassive black hole in the Galactic centre. They show several distinct characteristics, including an excess towards mid-infrared wavelengths and a significant linear polarization as well as a characteristic prolonged bow-shock shape. These features give hints about the presence of a non-spherical dusty envelope generated\nby the bow shock. The Dusty S-cluster Object (also denoted as G2) shows similar characteristics and it is a candidate for the closest bow shock with a detected proper motion in the vicinity of Sgr A*, with the pericentre distance of only approx. 2000 Schwarzschild radii. However, in the continuum emission it is a point-like source and hence we use Monte Carlo radiative transfer modeling to reveal its possible three-dimensional structure. Alongside the spectral energy distribution, the detection of polarized continuum emission in the near-infrared Ks-band (2.2 micrometers) puts additional constraints on the geometry of the source.
Keywords: black hole physics – Galaxy: centre –; galaxy centra; radiative transfer
Project no.: 312789, LTI17018, 7E13012 (CEP)
Funding provider: GA MŠk, GA MŠk
Host item entry: Proceedings of RAGtime 17/19: Workshops on black holes and neutron stars, ISBN 9788075102577, ISSN 2336-5668
Institution: Astronomical Institute AS ČR (web)
Document availability information: Fulltext is available at external website.
External URL: http://proceedings.physics.cz/images/proc17/zaj.pdf
Original record: http://hdl.handle.net/11104/0280091
Permalink: http://www.nusl.cz/ntk/nusl-371468
The record appears in these collections:
Research > Institutes ASCR > Astronomical Institute
Conference materials > Papers
Record created 2018-03-07, last modified 2021-11-24