2010/09/01 by Dipankar Maitra, Andrew Cantrell, Sera Markoff +3 · 2 citations
Physics and Astronomy · #Accretion (finance) #Active galactic nucleus #Astrophysical Phenomena and Observations #Astrophysical jet #Astrophysics and Cosmic Phenomena #Binary black hole #Black hole (networking) #Galaxies: Formation, Evolution, Phenomena #Intermediate-mass black hole #Spectral energy distribution #Stellar black hole #Supermassive black hole #astro-ph.HE
paper · pdf · doi:10.1017/s174392131001567x
published in Proceedings of the International Astronomical Union 6(S275), 82-86 (Cambridge University Press) · 4 pages, 2 figures. To appear in Proceedings of IAU Symposium 275 "Jets at all Scales", 13-17 September 2010, Buenos Aires, Argentina
openalex publication_date 2010/09/01 · arxiv created 2010/10/20 · arxiv updated 2015/05/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Abstract We present results of recent observations and theoretical modeling of data from black holes accreting at very low luminosities (L/L Edd ≲ 10 −8 ). We discuss our newly developed time-dependent model for episodic ejection of relativistic plasma within a jet framework, and a successful application of this model to describe the origin of radio flares seen in Sgr A*, the Galactic center black hole. Both the observed time lags and size-frequency relationships are reproduced well by the model. We also discuss results from new Spitzer data of the stellar black hole X-ray binary system A 0620–00. Complemented by long term SMARTS monitoring, these observations indicate that once the contribution from the accretion disk and the donor star are properly included, the residual mid-IR spectral energy distribution of A 0620–00 is quite flat and consistent with a non-thermal origin. The results above suggest that a significant fraction of the observed spectral energy distribution originating near black holes accreting at low luminosities could result from a mildly relativistic outflow. The fact that these outflows are seen in both stellar-mass black holes as well as in supermassive black holes at the heart of AGNs strengthens our expectation that accretion and jet physics scales with mass.