Title :
Equipping the Submillimeter Array for VLBI
Author :
Primiani, Rurik ; Weintroub, Jonathan ; Moran, James ; Doeleman, Sheperd
Author_Institution :
Harvard-Smithsonian Center for Astrophys., Cambridge, MA, USA
Abstract :
VLBI observations at a wavelength of 1.3mm have confirmed structure in SgrA* on scales of just a few Schwarzschild radii [1]. More sensitive observations in the next few years, if sufficiently sensitive, could confirm a tentative detection of time variable structures [2] predicted by models of flaring activity in SgrA*. A key improvement in sensitivity is provided by the deployment and commissioning of a VLBI phased array processor at the Submillimeter Array (SMA) on Mauna Kea. This new instrument enables the SMA and the neighboring single dish submillimeter telescopes, CSO and JCMT, to contribute to future VLBI observations with all their collecting area.
Keywords :
Galactic centre; radiosources (astronomical); submillimetre astronomy; SMA; Schwarzschild radii; Sgr A*; Submillimeter Array; VLBI observation; VLBI phased array processor; flaring activity; single dish submillimeter telescopes; wavelength 1.3 mm; Arrays; Delay; Phased arrays; Sensitivity; Telescopes;
Conference_Titel :
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-5117-3
DOI :
10.1109/URSIGASS.2011.6051272
