Radio Images inside Highly Magnetized Jet Funnels Based on Semianalytic GRMHD Models
By performing general-relativistic radiative transfer calculations, we show the radio images of relativistic jets including highly magnetized regions inside jet funnels, based on steady, axisymmetric, and semianalytic general-relativistic magnetohydrodynamics models. It is found that multiple ring i...
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ftdoajarticles:oai:doaj.org/article:2d92e1405fbe4169a4e01bc860aed2c3 2024-09-15T18:10:00+00:00 Radio Images inside Highly Magnetized Jet Funnels Based on Semianalytic GRMHD Models Taiki Ogihara Tomohisa Kawashima Ken Ohsuga 2024-01-01T00:00:00Z https://doi.org/10.3847/1538-4357/ad429a https://doaj.org/article/2d92e1405fbe4169a4e01bc860aed2c3 EN eng IOP Publishing https://doi.org/10.3847/1538-4357/ad429a https://doaj.org/toc/1538-4357 doi:10.3847/1538-4357/ad429a 1538-4357 https://doaj.org/article/2d92e1405fbe4169a4e01bc860aed2c3 The Astrophysical Journal, Vol 969, Iss 1, p 22 (2024) Active galactic nuclei Black hole physics General relativity Relativistic jets Magnetohydrodynamics Astrophysics QB460-466 article 2024 ftdoajarticles https://doi.org/10.3847/1538-4357/ad429a 2024-08-05T17:49:07Z By performing general-relativistic radiative transfer calculations, we show the radio images of relativistic jets including highly magnetized regions inside jet funnels, based on steady, axisymmetric, and semianalytic general-relativistic magnetohydrodynamics models. It is found that multiple ring images appear at the photon frequency of 230 GHz for nearly pole-on observers, because of the strong light-bending effect on photons generated at the separation surface, which is the boundary between the inflow and outflow flows in the jet funnel. A bright teardrop-shaped component, which extends from the bright rings of the separation surface, also appears in the counterjet region. The diameter of the brightest outermost ring originated from the counterjet is ∼60 μ as, which is consistent with the ringlike images of M87 at 86 GHz observed with GMVA, the Atacama Large Millimeter/submillimeter Array, and the Greenland Telescope, whose ring diameter is $\sim {64}_{-8}^{+4}\,\mu \mathrm{as}$ . The thinner and smaller-diameter rings are exhibited when the black hole spin magnitude is higher. These morphological features are expected to appear without being prominently affected by the detailed magnetohydrodynamic plasma parameters of our general-relativistic ideal magnetohydrodynamic (GRMHD) jet model, since the location of the separation surface is mainly regulated by the black hole spin. Our GRMHD model and the emission features of the images in the horizon-scale, highly magnetized jet funnel may be tested by future observations, e.g., the next-generation Event Horizon Telescope and the Black Hole Explorer. Article in Journal/Newspaper Greenland Greenland Telescope Directory of Open Access Journals: DOAJ Articles The Astrophysical Journal 969 1 22 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Active galactic nuclei Black hole physics General relativity Relativistic jets Magnetohydrodynamics Astrophysics QB460-466 |
spellingShingle |
Active galactic nuclei Black hole physics General relativity Relativistic jets Magnetohydrodynamics Astrophysics QB460-466 Taiki Ogihara Tomohisa Kawashima Ken Ohsuga Radio Images inside Highly Magnetized Jet Funnels Based on Semianalytic GRMHD Models |
topic_facet |
Active galactic nuclei Black hole physics General relativity Relativistic jets Magnetohydrodynamics Astrophysics QB460-466 |
description |
By performing general-relativistic radiative transfer calculations, we show the radio images of relativistic jets including highly magnetized regions inside jet funnels, based on steady, axisymmetric, and semianalytic general-relativistic magnetohydrodynamics models. It is found that multiple ring images appear at the photon frequency of 230 GHz for nearly pole-on observers, because of the strong light-bending effect on photons generated at the separation surface, which is the boundary between the inflow and outflow flows in the jet funnel. A bright teardrop-shaped component, which extends from the bright rings of the separation surface, also appears in the counterjet region. The diameter of the brightest outermost ring originated from the counterjet is ∼60 μ as, which is consistent with the ringlike images of M87 at 86 GHz observed with GMVA, the Atacama Large Millimeter/submillimeter Array, and the Greenland Telescope, whose ring diameter is $\sim {64}_{-8}^{+4}\,\mu \mathrm{as}$ . The thinner and smaller-diameter rings are exhibited when the black hole spin magnitude is higher. These morphological features are expected to appear without being prominently affected by the detailed magnetohydrodynamic plasma parameters of our general-relativistic ideal magnetohydrodynamic (GRMHD) jet model, since the location of the separation surface is mainly regulated by the black hole spin. Our GRMHD model and the emission features of the images in the horizon-scale, highly magnetized jet funnel may be tested by future observations, e.g., the next-generation Event Horizon Telescope and the Black Hole Explorer. |
format |
Article in Journal/Newspaper |
author |
Taiki Ogihara Tomohisa Kawashima Ken Ohsuga |
author_facet |
Taiki Ogihara Tomohisa Kawashima Ken Ohsuga |
author_sort |
Taiki Ogihara |
title |
Radio Images inside Highly Magnetized Jet Funnels Based on Semianalytic GRMHD Models |
title_short |
Radio Images inside Highly Magnetized Jet Funnels Based on Semianalytic GRMHD Models |
title_full |
Radio Images inside Highly Magnetized Jet Funnels Based on Semianalytic GRMHD Models |
title_fullStr |
Radio Images inside Highly Magnetized Jet Funnels Based on Semianalytic GRMHD Models |
title_full_unstemmed |
Radio Images inside Highly Magnetized Jet Funnels Based on Semianalytic GRMHD Models |
title_sort |
radio images inside highly magnetized jet funnels based on semianalytic grmhd models |
publisher |
IOP Publishing |
publishDate |
2024 |
url |
https://doi.org/10.3847/1538-4357/ad429a https://doaj.org/article/2d92e1405fbe4169a4e01bc860aed2c3 |
genre |
Greenland Greenland Telescope |
genre_facet |
Greenland Greenland Telescope |
op_source |
The Astrophysical Journal, Vol 969, Iss 1, p 22 (2024) |
op_relation |
https://doi.org/10.3847/1538-4357/ad429a https://doaj.org/toc/1538-4357 doi:10.3847/1538-4357/ad429a 1538-4357 https://doaj.org/article/2d92e1405fbe4169a4e01bc860aed2c3 |
op_doi |
https://doi.org/10.3847/1538-4357/ad429a |
container_title |
The Astrophysical Journal |
container_volume |
969 |
container_issue |
1 |
container_start_page |
22 |
_version_ |
1810447597202046976 |