Submm VLBI toward Shadow Image of Super Massive Black Hole

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Presentation transcript:

Submm VLBI toward Shadow Image of Super Massive Black Hole Inoue, M.1, Blundell, R.2, Brisken, W.3, Chen, M.T.1, Doeleman, S.4, Fish, V.4, Ho, P.1,2, Moran, J.2, Napier, P.3, and the Greenland Telescope (GLT) Team (1ASIAA; 2CfA; 3NRAO; 4MIT Haystack Observatory)

Leading-edge interferometry system to see Event Horizon of SMBH i = 10 deg. i = 85 deg. a = 0 a = 0.5 a = 0.999 Image simulation for an optically thick and geometrically thin disk. (R. Takahashi)

Name Shadow (μas) Mass (106Msun) Dist (Mpc) SMBH Shadow size Rshadow ≈ 5 Rsch Name Shadow (μas) Mass (106Msun) Dist (Mpc) Sgr A* 50 4.1±0.6 0.008 M87 21 3600±1000 17.0 M31 18 180±80 0.80 M60 12 2100±600 16.5 N5128 7 310±30 4.4 Gultekin+ 09

Name Shadow (μas) Mass (106Msun) Dist (Mpc) SMBH Shadow size Rshadow ≈ 5 Rsch Name Shadow (μas) Mass (106Msun) Dist (Mpc) Sgr A* 50 4.1±0.6 0.008 M87 39 6600±400# 17.0 M31 18 180±80 0.80 M60 12 2100±600 16.5 N5128 7 310±30 4.4 #Gebhardt+ 11

New submm Telescope Retrofitted ALMA-NA Prototype

The Summit Station in Greenland Established: 1989, height: 3,210m (72.60N, 38.42W) NSF: Office of Polar Program, CH2M Hill, Cold Regions Res. & Eng. Lab., NOAA etc. Population: 45 (Summer), 5 (Winter, 3 month shifts)

Long & multi BLs at 230 GHz UV distribution for M87 at 230 GHz with SMA, ALMA, SMT, LMT, and IRAM 30m. Red lines are the GLT contributions.

GLT Baselines at 350 GHz and higher Greenland GLT; artist's impression Hawaii Phased SMA Chile Phased ALMA Baselines are 9,000 km long, and the resolution reaches 20 μas at 345 GHz.