Constraints on the mass accretion rate onto the supermassive black hole of cygnus : A using the Submillimeter Array
We present the first detailed polarimetric studies of Cygnus A at 230 GHz with the Submillimeter Array (SMA) to constrain the mass accretion rate onto its supermassive black hole. We detected the polarized emission associated with the core at a fractional polarization of 0.73 +/- 0.15%. This low fra...
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my.um.eprints.346372022-05-31T08:06:45Z http://eprints.um.edu.my/34637/ Constraints on the mass accretion rate onto the supermassive black hole of cygnus : A using the Submillimeter Array Lo, Wen-Ping Asada, Keiichi Matsushita, Satoki Nakamura, Masanori Pu, Hung-Yi Tseng, Chihyin Akiyama, Kazunori Algaba, Juan Carlos Bower, Geoffrey C. Rao, Ramprasad Koay, Jun Yi Koch, Patrick M. Koyama, Shoko Ho, Paul T. P. Inoue, Makoto QB Astronomy QC Physics We present the first detailed polarimetric studies of Cygnus A at 230 GHz with the Submillimeter Array (SMA) to constrain the mass accretion rate onto its supermassive black hole. We detected the polarized emission associated with the core at a fractional polarization of 0.73 +/- 0.15%. This low fractional polarization suggests that the polarized emission is highly depolarized. One of the possible explanations is due to a significant variance in the Faraday rotation measure within the synthesized beam. By assuming the Faraday depolarization caused by inhomogeneous column density of the magnetized plasma associated with the surrounding radiatively-inefficient accretion flow within the SMA beam, we derived the constraint on the mass accretion rate to be larger than 0.15 M-circle dot yr(-1) at the Bondi radius. The derived constraint indicates that an adiabatic inflow-outflow solution or an advection-dominated accretion flow should be preferable as the accretion flow model in order to explain the jet power of Cygnus A. IOP Publishing Ltd 2021-04 Article PeerReviewed Lo, Wen-Ping and Asada, Keiichi and Matsushita, Satoki and Nakamura, Masanori and Pu, Hung-Yi and Tseng, Chihyin and Akiyama, Kazunori and Algaba, Juan Carlos and Bower, Geoffrey C. and Rao, Ramprasad and Koay, Jun Yi and Koch, Patrick M. and Koyama, Shoko and Ho, Paul T. P. and Inoue, Makoto (2021) Constraints on the mass accretion rate onto the supermassive black hole of cygnus : A using the Submillimeter Array. Astrophysical Journal, 911 (1). ISSN 0004-637X, DOI https://doi.org/10.3847/1538-4357/abd17b <https://doi.org/10.3847/1538-4357/abd17b>. 10.3847/1538-4357/abd17b |
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QB Astronomy QC Physics Lo, Wen-Ping Asada, Keiichi Matsushita, Satoki Nakamura, Masanori Pu, Hung-Yi Tseng, Chihyin Akiyama, Kazunori Algaba, Juan Carlos Bower, Geoffrey C. Rao, Ramprasad Koay, Jun Yi Koch, Patrick M. Koyama, Shoko Ho, Paul T. P. Inoue, Makoto Constraints on the mass accretion rate onto the supermassive black hole of cygnus : A using the Submillimeter Array |
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We present the first detailed polarimetric studies of Cygnus A at 230 GHz with the Submillimeter Array (SMA) to constrain the mass accretion rate onto its supermassive black hole. We detected the polarized emission associated with the core at a fractional polarization of 0.73 +/- 0.15%. This low fractional polarization suggests that the polarized emission is highly depolarized. One of the possible explanations is due to a significant variance in the Faraday rotation measure within the synthesized beam. By assuming the Faraday depolarization caused by inhomogeneous column density of the magnetized plasma associated with the surrounding radiatively-inefficient accretion flow within the SMA beam, we derived the constraint on the mass accretion rate to be larger than 0.15 M-circle dot yr(-1) at the Bondi radius. The derived constraint indicates that an adiabatic inflow-outflow solution or an advection-dominated accretion flow should be preferable as the accretion flow model in order to explain the jet power of Cygnus A. |
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Article |
author |
Lo, Wen-Ping Asada, Keiichi Matsushita, Satoki Nakamura, Masanori Pu, Hung-Yi Tseng, Chihyin Akiyama, Kazunori Algaba, Juan Carlos Bower, Geoffrey C. Rao, Ramprasad Koay, Jun Yi Koch, Patrick M. Koyama, Shoko Ho, Paul T. P. Inoue, Makoto |
author_facet |
Lo, Wen-Ping Asada, Keiichi Matsushita, Satoki Nakamura, Masanori Pu, Hung-Yi Tseng, Chihyin Akiyama, Kazunori Algaba, Juan Carlos Bower, Geoffrey C. Rao, Ramprasad Koay, Jun Yi Koch, Patrick M. Koyama, Shoko Ho, Paul T. P. Inoue, Makoto |
author_sort |
Lo, Wen-Ping |
title |
Constraints on the mass accretion rate onto the supermassive black hole of cygnus : A using the Submillimeter Array |
title_short |
Constraints on the mass accretion rate onto the supermassive black hole of cygnus : A using the Submillimeter Array |
title_full |
Constraints on the mass accretion rate onto the supermassive black hole of cygnus : A using the Submillimeter Array |
title_fullStr |
Constraints on the mass accretion rate onto the supermassive black hole of cygnus : A using the Submillimeter Array |
title_full_unstemmed |
Constraints on the mass accretion rate onto the supermassive black hole of cygnus : A using the Submillimeter Array |
title_sort |
constraints on the mass accretion rate onto the supermassive black hole of cygnus : a using the submillimeter array |
publisher |
IOP Publishing Ltd |
publishDate |
2021 |
url |
http://eprints.um.edu.my/34637/ |
_version_ |
1735409619378896896 |
score |
13.19449 |