Huang, Lei, Takahashi, Rohta, Shen, Zhi-Qiang
The vicinity of the supermassive black hole associated with the compact radio source Sagittarius (Sgr) A* is believed to dominate the observed emission at wavelengths near and shorter than $\sim$ 1...
Polarized Emission of Sagittarius A* (2009)
Huang, Lei, Liu, Siming, Shen, Zhi-Qiang, Yuan, Ye-Fei, Cai, Mike J., Li, Hui, ...
We explore the parameter space of the two temperature pseudo-Newtonian Keplerian accretion flow model for the millimeter and shorter wavelength emission from Sagittarius A*. A general relativistic...
Oscillation Phenomena in the disk around the massive black hole Sagittarius A* (2009)
Miyoshi, M., Shen, Zhi-Qiang, Oyama, T., Takahashi, R., Kato, Y.
We report the detection of radio QPOs with structure changes using the Very Long Baseline Array (VLBA) at 43 GHz. We found conspicuous patterned changes of the structure with P = 16.8, 22.2, 31.4, &...
The variability of Sagittarius A* at 3 millimeter (2009)
Li, Juan, Shen, Zhi-Qiang, Miyazaki, Atsushi, Huang, Lei, Sault, R. J., Miyoshi, Makoto, ...
We have performed monitoring observations of the 3-mm flux density toward the Galactic Center compact radio source Sgr A* with the Australia Telescope Compact Array since 2005 October. Careful...
Yuan, Ye-Fei, Cao, Xinwu, Huang, Lei, Shen, Zhi-Qiang
In fully general relativity, we calculate the images of the radiatively inefficient accretion flow (RIAF) surrounding a Kerr black hole with arbitrary spins, inclination angles, and observational...
Splitting of transmission peak due to the hole symmetry breaking (2009)
Yin, Xiao-gang, Huang, Cheng-ping, Shen, Zhi-Qiang, Wang, Qian-jin, Zhu, Yong-yuan
We studied experimentally and theoretically the optical transmission through asymmetrical holes of a metal film, which is constructed by introducing small protuberances to the sides of individual...
Class I methanol masers: Masers with EGOs (2009)
Chen, Xi, Ellingsen, Simon, Shen, Zhi-Qiang
We have compared the results of a number of published class I methanol maser surveys with the catalogue of high-mass outflow candidates identified from the GLIMPSE survey (known as extended green...
Antioxidant intervention of smoking-induced lung tumor in mice by vitamin E and quercetin (2008)
Yang, Jie, Wang, Lu, Chen, Zhaoli, Shen, Zhi-Qiang, Jin, Min, Wang, Xin-Wei, ...
Abstract Background Epidemiological and in vitro studies suggest that antioxidants such as quercetin and vitamin E (VE) can prevent lung tumor caused by smoking; however, there is limited evidence...
A Modified Stratified Model for 3C 273 Jet (2008)
We present a modified stratified jet model to interpret the observed spectral energy distributions of knots in 3C 273 jet. Based on the hypothesis of the single index of the particle energy spectrum...
An Approach Detecting the Event Horizon of Sgr A* (2008)
Miyoshi, Makoto, Kameno, Seiji, Ishituka, Jose K., Shen, Zhi-Qiang, Takahashi, Rohta, Horiuchi, Shinji
Imaging the vicinity of a black hole is one of the ultimate goals of VLBI astronomy. The closest massive black hole, Sgr A*, located at the Galactic center, is the leading candidate for such...
VLBI Observations of SiO Masers around AH Scorpii (2008)
We report the first Very Long Baseline Array (VLBA) observations of 43 GHz v=1, J=1-0 SiO masers in the circumstellar envelope of the M-type semi-regular supergiant variable star AH Sco at 2 epochs...
Intrinsic Size Of Sgr A (2007)
Schwarzschild Radii, K. Y. Lo, Zhi-qiang Shen, Jun-hui Zhao, Sgr A
Recent proper motion studies of stars at the very center of the Galaxy strongly suggest that Sagittarius (Sgr) A ? , the compact nonthermal radio source at the Galactic Center, is a 2.5\Theta10 6 M...
A Modified Synchrotron Model for Knots in the M87 Jet (2007)
For explaining the broadband spectral shape of knots in the M87 jet from radio through optical to X-ray, we propose a modified synchrotron model that considers the integrated effect of particle...
Seven-frequency VLBI observations of the GHz-Peaked-Spectrum source OQ 208 (2007)
Luo, Wen-Feng, Yang, Jun, Cui, Lang, Liu, Xiang, Shen, Zhi-Qiang, ...
We present images of quasi-simultaneous VLBI observations of the GHz-Peaked-Spectrum radio source OQ 208 with the Very Long Baseline Array at 1.4, 1.7, 2.3, 5.0, 8.4, 15.4 GHz and the European VLBI...
Black Hole Shadow Image and Visibility Analysis of Sagittarius A* (2007)
Huang, Lei, Cai, Mike, Shen, Zhi-Qiang, Yuan, Feng
The compact dark objects with very large masses residing at the centres of galaxies are believed to be black holes. Due to the gravitational lensing effect, they would cast a shadow larger than their...
High-resolution Millimeter-VLBI Imaging of Sgr A* (2006)
We present the highest resolution VLBI imaging observations of Sgr A* made at both 7 and 3.5 mm. These data reveal wavelength-dependent intrinsic sizes with an intrinsic emitting region at 3.5 mm of...
Testing RIAF model for Sgr A* using the size measurements (2006)
Yuan, Feng, Shen, Zhi-Qiang, Huang, Lei
Recent radio observations by the VLBA at 7 and 3.5 mm produced the high-resolution images of the compact radio source located at the center of our Galaxy--Sgr A*, and detected its...
The expanding radio lobe of 3C 84 revealed by VSOP observations (2006)
Asada, Keiichi, Kameno, Seiji, Shen, Zhi-Qiang, Horiuchi, Shinji, Gabuzda, Denise C., Inoue, Makoto, ...
The expansion and inner proper motions of a young radio lobe associated with the bright radio source 3C 84 in the Seyfert galaxy NGC 1275 have been detected by VSOP observations. These proper motions...
The expanding radio lobe of 3C 84 revealed by VSOP observations (2006)
Asada, Keiichi, Kameno, Seiji, Shen, Zhi-Qiang, Horiuchi, Shinji, Gabuzda, Denise C., Inoue, Makoto
The expansion and inner proper motions of a young radio lobe associated with the bright radio source 3C 84 in the Seyfert galaxy NGC 1275 have been detected by VSOP observations. These proper motions...
The expanding radio lobe of 3C 84 revealed by VSOP observations (2006)
Asada, Keiichi, Kameno, Seiji, Shen, Zhi-Qiang, Horiuchi, Shinji, Gabuzda, Denise C., Inoue, Makoto
The expansion and inner proper motions of a young radio lobe associated with the bright radio source 3C 84 in the Seyfert galaxy NGC 1275 have been detected by VSOP observations. These proper motions...
The expanding radio lobe of 3C 84 revealed by VSOP observations (2006)
Asada, Keiichi, Kameno, Seiji, Shen, Zhi-Qiang, Horiuchi, Shinji, Gabuzda, Denise C., Inoue, Makoto
The expansion and inner proper motions of a young radio lobe associated with the bright radio source 3C 84 in the Seyfert galaxy NGC 1275 have been detected by VSOP observations. These proper motions...
The expanding radio lobe of 3C 84 revealed by VSOP observations (2006)
Asada, Keiichi, Kameno, Seiji, Shen, Zhi-Qiang, Horiuchi, Shinji, Gabuzda, Denise C., Inoue, Makoto
The expansion and inner proper motions of a young radio lobe associated with the bright radio source 3C 84 in the Seyfert galaxy NGC 1275 have been detected by VSOP observations. These proper motions...
Flares of Sagittarius a* at Millimeter Wavelengths (2005)
Miyazaki, Atsushi, Tsutsumi, Takahiro, Miyoshi, Makoto, Tsuboi, Masato, Shen, Zhi-Qiang
We have performed monitoring observations of the flux density toward the Galactic center compact radio source, Sagittarius A* (Sgr A*), which is a supermassive black hole, from 1996 to 2005 using the...
A size of ~1 AU for the radio source Sgr A* at the centre of the Milky Way (2005)
Shen, Zhi-Qiang, Lo, K. Y., Ho, Paul T. P.
Although it is widely accepted that most galaxies have supermassive black holes (SMBHs) at their centers^{1-3}, concrete proof has proved elusive. Sagittarius A* (Sgr A*)^4, an extremely compact...
Inward Motions of the Compact SiO Masers Around VX Sagittarii (2005)
Chen, Xi, Shen, Zhi-Qiang, Imai, Hiroshi, Kamohara, Ryuichi
We report Very Long Baseline Array (VLBA) observations of 43 GHz v=1, J=1-0 SiO masers in the circumstellar envelope of the M-type semi-regular variable star VX Sgr at 3 epochs during 1999 April-May....
Direct imaging of the massive black hole, SgrA (2004)
Miyoshi, Makoto, Ishitsuka, Jose K., Kameno, Seiji, Shen, Zhi-Qiang, Horiuchi, Shinji
Imaging the vicinity of black hole is one of the ultimate goals of VLBI astronomy. The closest massive black hole, SgrA*, located at Galactic center is the leading candidate for such observations....
Direct imaging of the massive black hole, SgrA (2004)
Miyoshi, Makoto, Ishitsuka, Jose K., Kameno, Seiji, Shen, Zhi-Qiang, Horiuchi, Shinji
Imaging the vicinity of black hole is one of the ultimate goals of VLBI astronomy. The closest massive black hole, SgrA*, located at Galactic center is the leading candidate for such observations....
Direct imaging of the massive black hole, SgrA (2004)
Miyoshi, Makoto, Ishitsuka, Jose K., Kameno, Seiji, Shen, Zhi-Qiang, Horiuchi, Shinji
Imaging the vicinity of black hole is one of the ultimate goals of VLBI astronomy. The closest massive black hole, SgrA*, located at Galactic center is the leading candidate for such observations....
Direct imaging of the massive black hole, SgrA (2004)
Miyoshi, Makoto, Ishitsuka, Jose K., Kameno, Seiji, Shen, Zhi-Qiang, Horiuchi, Shinji
Imaging the vicinity of black hole is one of the ultimate goals of VLBI astronomy. The closest massive black hole, SgrA*, located at Galactic center is the leading candidate for such observations....
Direct imaging of the massive black hole, SgrA (2004)
Miyoshi, Makoto, Ishitsuka, Jose K., Kameno, Seiji, Shen, Zhi-Qiang, Horiuchi, Shinji
Imaging the vicinity of black hole is one of the ultimate goals of VLBI astronomy. The closest massive black hole, SgrA*, located at Galactic center is the leading candidate for such observations....
Dense Plasma Torus in the GPS Galaxy NGC 1052 (2002)
Kameno, Seiji, Inoue, Makoto, Wajima, Kiyoaki, Sawada-Satoh, Satoko, Shen, Zhi-Qiang
We report results from nearly simultaneous pentachromatic VLBI observations towa rds a nearby GPS galaxy NGC 1052. The observations at 1.6 and 4.8 GHz with VSOP, and at 2.3, 8.4, and 15.4 GHz wit h...
The milliarcsecond structure of a sample of southern blazars / (1996)
Thesis (Ph. D.)--Shanghai Observatory, Chinese Academy of Sciences, 1996.
Huang, Aihua, Li, Jun-Wen, Shen, Zhi-Qiang, Wang, Xin-Wei, Jin, Min
Here we report the development of an oligonucleotide microarray method that can identify fungal pathogens in a single reaction. Specific oligonucleotide probes targeted to internal transcribed spacer...