Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..402..284d&link_type=abstract
Approaching Micro-Arcsecond Resolution with VSOP-2: Astrophysics and Technologies ASP Conference Series, Vol. 402, proceedings o
Astronomy and Astrophysics
Astrophysics
Scientific paper
We report the advantages and potentials of VSOP-2 observations for research on accretion disks, and a polished plan based on this studies may be proposed as one of the Key Science Programs of VSOP-2 mission in the category of Active Galactic Nuclei (AGN). A radiative inefficient accretion flow, a possible model of accretion disks on low-luminosity AGNs, predicts electron temperatures of about 10^9 K at radii within several tens of Schwarzschild radius. The region should be optically thick at the observing frequencies of VSOP-2. Hence, the shape of accretion disks could be imaged with the sensitivity and angular resolutions of VSOP-2 for some nearby low-luminosity AGNs. We show a list of target candidates in terms of their apparent Schwarzschild radius and radio properties. A pre-launch ground-based survey would be needed in order to determine the priority order, which will be useful for preparing an effective VSOP-2 observation plan.
Doi Akihiro
VSOP-2 Science Working Group
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