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Image simulation of black hole shadow and jet Image simulation of black hole shadow and jet
The black hole shadow image (the bright circle) resulting from a relativistic jet (the luminous u-shape region) launched near the event horizon. ...(more)
Image simulation of black hole shadow Image simulation of black hole shadow
Image simulation of black hole shadow ("silhouette") images based on a possible accretion flow model. ...(more)
Semi-analytical GRMHD jet model Semi-analytical GRMHD jet model
A semi-analytical solution of GRMHD flow along a prescribed flow line can be obtained by considering that the outward energy flux (represented by a gray arrow) is continuously propagate outward ...(more)
Visualizing ray around a Kerr black hole Visualizing ray around a Kerr black hole
"Odyssey_Edu" is an educational software is developed for visualizing the ray around a Kerr black hole (available at https://odysseyedu.wordpress.com/). ...(more)
Distribution of the bulk velocity relative to the speed of light Distribution of the bulk velocity relative to the speed of light
Distribution of the bulk velocity relative to the speed of light is shown as a function of the de-projected distance (normalized by r_s) from the core of the relativistic jet ...(more)
A Self-consistent Model for Super/sub-luminal Motions and Particle Acceleration in the M87 Jet A Self-consistent Model for Super/sub-luminal Motions and Particle Acceleration in the M87 Jet
Distribution of the physical quantities along the jet propagation axis. We perform special relativistic MHD simulations in a cylindrical 1.5-dimensional pproximation. Our model reproduces a paired super/subluminal knot motions, taken ...(more)
Hubble Takes Movies of Space Slinky in M87 Hubble Takes Movies of Space Slinky in M87
This sequence of images, taken over a 13-year span by NASA's Hubble Space Telescope, reveals changes in a black-hole-powered jet of hot gas in the giant elliptical galaxy M87. The ...(more)
Comparing optical and radio polarization angles of the quasar 1954+513 Comparing optical and radio polarization angles of the quasar 1954+513
Left: Rotation Measure (RM) of 1954+513. The leftmost red dot indicates electric vector position angle in optical, whilst the black dots indicate radio measurements at 12, 15, 22, 24 and ...(more)
Rotation measure gradient in 3C 216 Rotation measure gradient in 3C 216
Left: VLBA rotation measure (RM) map of 3C 216 from 12 to 24 GHz. A clear gradient transverse to the direction of the jet is observed. Thick line indicates the ...(more)
Toward the Innermost Region of the Relativistic Jet from Supermassive Black Hole in the Active Galactic Nuclues M87 Toward the Innermost Region of the Relativistic Jet from Supermassive Black Hole in the Active Galactic Nuclues M87
Global structure of the M87 jet is examined by multi-frequency observations. Figure shows that distribution of the radius ($r$) of the jet as a function of the de-projected distance ($z$) ...(more)
ASIAA Cluster for VLBI DiFX correlator. ASIAA Cluster for VLBI DiFX correlator.
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The ALMA-NA prototype telescope at Socorro, New Mexico, with one of the JVLA antennas. The ALMA-NA prototype telescope at Socorro, New Mexico, with one of the JVLA antennas.
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ASIAA radiometer in Eureka, Canada ASIAA radiometer in Eureka, Canada
One of our new initiatives is to find a new site for submillimeter telescope. Such effort needs a long-term monitoring of the sky transparency in radio wavelength. In February 2011, ...(more)
Disassemble one of the ALMA prototype antennas for retrofitting and ready for the use of VLBI in submillimeter wavelength Disassemble one of the ALMA prototype antennas for retrofitting and ready for the use of VLBI in submillimeter wavelength
Disassemble one of the ALMA prototype antennas for retrofitting and ready for the use of VLBI in submillimeter wavelength. This picture shows the disassembly process in November 2012, at the ...(more)
Retrofitting one of the ALMA prototype antennas for the use of VLBI in submillimeter wavelength Retrofitting one of the ALMA prototype antennas for the use of VLBI in submillimeter wavelength
Retrofitting one of the ALMA prototype antennas for the use of VLBI in submillimeter wavelength. This picture shows the preliminary inspection of the antenna in July 2011, at the site ...(more)
ASIAA Radiometer in Greenland ASIAA Radiometer in Greenland
The 225 GHz ASIAA radiometer has been surveying the atmospheric clarity on the Greenland ice sheet since the summer of 2011. It has provided us the precious data regarding the ...(more)
Greenlan Telescope Project -- Disassembly in Socorro, NM Greenlan Telescope Project -- Disassembly in Socorro, NM
Disassembly of the ALMA NA Prototype in Nov. 2012. The antenna will be retrofitted for the extreme cold environment operations on the Greenland ice sheet. ...(more)
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