Research Highlights

The first image of the supermassive black hole at the center of our Galaxy, Sgr A*. With this image, we are now very sure that this source is a supermassive (...more)

GLT joined the 2022 Event Horizon Telescope (EHT) 230 GHz and Global Millimeter VLBI Array (GMVA) 86 GHz VLBI observations. Picture taken at the ASIAA Remote Observation Room with video-linked (...more)

Due to the pandemic, we quickly made the remote observation system for the GLT, and successfully joined the Event Horizon Telescope (EHT) 230 GHz and the Global Millimeter VLBI Array (...more)

The polarized light at the vicinity of the black hole for the first time (EHT Collaboration et al. 2021, ApJL, 910, L12), which carries the magnetic field and plasma information (...more)

The first ever image of a black hole shadow in the human history. The image is a supermassive black hole at the center of an elliptical galaxy M87 at the (...more)

Due to the huge success of the first black hole shadow press conference, the AS Headquarter decided to have the main theme of “Black Hole” in the 22nd AS Open (...more)

On April 10, 2019, we held a very large press conference in the Academia Sinica (AS) Headquarter, simultaneously together with five other regions (Brussels, Santiago, Shanghai, Tokyo, & Washington D.C.) (...more)

On Sep.1, 2018, since the antenna dish surface accuracy was improved, Moon started to rise from the horizon, and the sky was clear, so we tried to observe Moon using (...more)

Improvement of the accuracy of the GLT antenna dish surface is done by the photogrammetry. (...more)

We successfully joined the EHT observations for the first time in Apr. 2018, and observed the SMBH of M87, together with ALMA, JCMT, and SMA, which are Taiwan related telescopes, (...more)

We joined a dress rehearsal for the EHT 2018 observations on Jan. 28th ,2018, together with the ALMA and the South Pole Telescope (SPT). (...more)

After the GLT antenna construction finished and all the instruments,electricity, and electronics had been installed, we officially started the antenna commissioning from Dec. 1st, 2017. (...more)

The Cryostat is fixed on a hydraulic lifting dolly as a "package", and this package is lifted by a cherry picker in order to put on the Rx-cabin platform. (...more)

On Jul. 24th, 2017, the primary dish was moved to the telescope site and lifted onto the antenna mount. This finalized the GLT antenna assembly in Thule, which meant reaching (...more)

On Jul. 24th, 2017, the GLT primary dish was moved to the telescope site, and lifting onto the antenna mount. (...more)

On Jul. 24th, 2017, the GLT primary dish was moved from a hanger to the telescope site. (...more)

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)

"Odyssey_Edu" is an educational software is developed for visualizing the ray around a Kerr black hole (available at https://odysseyedu.wordpress.com/). (...more)

Image simulation of black hole shadow ("silhouette") images based on a possible accretion flow model. (...more)

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)

The black hole shadow image (the bright circle) resulting from a relativistic jet (the luminous u-shape region) launched near the event horizon. (...more)

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)

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)

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)

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. (...more)

The ALMA-NA prototype telescope at Socorro, New Mexico, with one of the JVLA antennas. (...more)

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)

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. This picture shows the disassembly process in November 2012, at the (...more)

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)

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)

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)