supported by the National Natural Science Foundation of China(Grant Nos.U1431125 and U1631106);the Science and Technology Innovation Program of Shanxi Province(2019L0876);Yuncheng University(YQ-2019016)。
SiO maser VLBA observations toward VX Sgr are performed at five epochs, and lots of maser spots are obtained. We make a statistical analysis on these spots. It is shown that the apparent sizes and the fluxes of maser ...
funded by the Russian Foundationfor Basic Research through research project 18-32-00605;supported by Russian Science Foundation grant18-12-00193;supported by Act 211 of theGovernment of the Russian Federation, agreement No.02.A03.21.0006
We present the database of maser sources in H2 O, OH and Si O lines that can be used to identify and study variable stars at evolved stages. Detecting the maser emission in H2 O, OH and Si O molecules toward infrared-...
supported by the Russian ScienceFoundation (Grant 18-12-00193);supported by Russian Foundation for Basic Research(Grant 18-32-00314)
We report variation of K-band infrared(IR) emission in the vicinity of the G025.65+1.05 water and methanol maser source. New observational data were obtained with the 2.5 m telescope at the Caucasian Mountain Observat...
supported by the China Ministry of Science and Technology under the National Basic Research Program of China (973 program, 2012CB821800);the National Natural Science Foundation of China (Nos. 11473007, 11373038 and 11590782);supported by the Strategic Priority Research Program (No. XDB09000000) from the Chinese Academy of Sciences
The Five-hundred-meter Aperture Spherical radio Telescope(FAST) will make contributions to studies of Galactic and extragalactic masers. This telescope, with construction finished and now undergoing commissioning, has...
sponsored by the MOST (Grant No.2017YFA0402701);the NSFC (Grant Nos.11873019, 11673066 and 11503033);the CAS (Grant No.QYZDJ-SSW-SLH047);the Youth Innovation Promotion Association of CAS;supported by the Key Laboratory for Radio Astronomy, CAS;the Open Project Program of the Key Laboratory of FAST, NAOC, CAS;Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement
The morphology and kinematics of the spiral structure of the Milky Way are long-standing problems in astrophysics.In this review we firstly summarize various methods with different tracers used to solve this puzzle.Th...
funded by the National Natural Science Foundation of China under grant 11373062;supported by the National Basic Research Program of China (973 program,2012CB821802);the National Natural Science Foundation of China under grant Nos.11433008,11303081 and 10873025;the Program of the Light in China’s Western Region (LCRW) under grant Nos.RCPY201202 and XBBS-2014-24
We performed an H20 maser survey towards 274 Bolocam Galactic Plane Survey (BGPS) sources with 85° 〈 1 〈 193° using the Nanshan 25 m radio telescope. We detected 25 H2O masers, and five of them are new detection...
As the recent publication by Breen et al. (2013) found, Class II methanol masers are exclusively associated with high mass star forming regions. Based on the positions of the Class I and II methanol and H2O masers, UC...
Supported by the National Natural Science Foundation of China(Grant Nos.11133008 and J1210039)
We reconstruct the rotation curve of the Milky Way using the new trigono-metric parallax and proper motion data for masers in 43 high-mass star-forming re-gions obtained by VLBI, as well as the existing data from the ...
supported by the National Science Foundation of China (Grant Nos.11073046 and 11133008)
We report the internal proper motions of 12 GHz methanol masers in mas-sive star-forming region G35.20-0.74 observed with the Very Long Baseline Array (VLBA) at four epochs spanning about 1.5 yr. Two groups of maser...
Project supported by the National Natural Science Foundation of China (Grant No. 60801031)
The hybrid-mode dispersion equation of the metal-grating periodic slow-wave structure for a rectangular Cerenkov maser is derived by using the Borgnis function and field-matching methods.An equivalent-circuit model fo...