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5 papers · 2 filters
Constraining the Flaring Region of Sagittarius A* By 1.3mm VLBI Measurements
Lei Huang, Zhi-Qiang Shen, Feng Gao
We use a model of an accretion flow coupled with an emergent flare to interpret the latest 1.3mm VLBI measurements for Sagittarius A*. The visibility data constrained the distances…
Unification of Radio Galaxies and Their Accretion/Jet Properties
Qingwen Wu, Ya-Di Xu, Xinwu Cao
We investigate the relation between black hole mass, M_bh, and jet power, Q_jet, for a sample of BL Lacs and radio quasars. We find that BL Lacs are separated from radio quasars by…
Trigonometric Parallaxes of Massive Star Forming Regions: VIII. G12.89+0.49, G15.03-0.68 (M17) and G27.36-0.16
Y. Xu, L. Moscadelli, M. J. Reid +4
We report trigonometric parallaxes for three massive star forming regions, corresponding to distances of kpc for G12.89+0.49 (also known as IRAS 18089-1732),…
Rapid dynamical mass segregation and properties of fractal star clusters
Jincheng Yu, Richard de Grijs, Li Chen
We investigate the evolution of young star clusters using N-body simulations. We confirm that subvirial and fractal-structured clusters will dynamically mass segregate on a short t…
The Bar and Spiral Structure Legacy (BeSSeL) Survey: Mapping the Milky Way with VLBI Astrometry
Andreas Brunthaler, Mark J. Reid, Karl M. Menten +14
Astrometric Very Long Baseline Interferometry (VLBI) observations of maser sources in the Milky Way are used to map the spiral structure of our Galaxy and to determine fundamental…