TY - JOUR
T1 - Radio light curves during the passage of cloud G2 near Sgr A
AU - Sadowski, Aleksander
AU - Sironi, Lorenzo
AU - Abarca, David
AU - Guo, Xinyi
AU - Özel, Feryal
AU - Narayan, Ramesh
N1 - Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013/6
Y1 - 2013/6
N2 - We calculate radio light curves produced by the bow shock that is likely to form in front of the G2 cloud when it penetrates the accretion disc of Sgr A*. The shock acceleration of the radioemitting electrons is captured self-consistently by means of first-principles particle-in-cell simulations. We show that the radio luminosity is expected to reach maximum in early 2013, roughly a month after the bow shock crosses the orbit pericentre. We estimate the peak radio flux at 1.4 GHz to be 1.4-22 Jy depending on the assumed orbit orientation and parameters. We show that the most promising frequencies for radio observations are in the 0.1 < ν < 1 GHz range, for which the bow shock emission will be much stronger than the intrinsic radio flux for all the models considered.
AB - We calculate radio light curves produced by the bow shock that is likely to form in front of the G2 cloud when it penetrates the accretion disc of Sgr A*. The shock acceleration of the radioemitting electrons is captured self-consistently by means of first-principles particle-in-cell simulations. We show that the radio luminosity is expected to reach maximum in early 2013, roughly a month after the bow shock crosses the orbit pericentre. We estimate the peak radio flux at 1.4 GHz to be 1.4-22 Jy depending on the assumed orbit orientation and parameters. We show that the most promising frequencies for radio observations are in the 0.1 < ν < 1 GHz range, for which the bow shock emission will be much stronger than the intrinsic radio flux for all the models considered.
KW - Acceleration of particles
KW - Accretion, accretion discs
KW - Black hole physics
KW - Radiation mechanisms: non-thermal
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U2 - 10.1093/mnras/stt495
DO - 10.1093/mnras/stt495
M3 - Article
AN - SCOPUS:84878384434
VL - 432
SP - 478
EP - 491
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 1
ER -