ALMA Cycle-0 Observation of the Sombrero Galaxy (M104)
Abstract
We present a progress report of the ALMA cycle 0 observation for point source photometry toward the nucleus in the Sombrero galaxy. Observation was performed quasi-simulteneously at fifteen sideband frequencies in the band-3, 6, 7 and 9 to obtain a continuum spectrum for understanding of accretion and outflow phenomena in about 10 Schwarzschild radius or less. We found a mildly rising spectrum at ∼ 90-700 GHz for the radio nucleus. This is the most direct and promising approach to the vicinity of the event horizon, in advance of a future submm VLBI.
- Publication:
-
New Trends in Radio Astronomy in the ALMA Era: The 30th Anniversary of Nobeyama Radio Observatory
- Pub Date:
- October 2013
- Bibcode:
- 2013ASPC..476..293D