Greenland telescope (GLT) Project: "a direct confirmation of black hole with submillimeter VLBI"

M. Nakamura, J. C. Algaba, K. Asada, B. Chen, M. T. Chen, J. Han, P. H.P. Ho, S. N. Hsieh, T. Huang, M. Inoue, P. Koch, C. Y. Kuo, P. Martin-Cocher, S. Matsushita, Z. Meyer-Zhao, H. Nishioka, G. Nystrom, N. Pradel, H. Y. Pu, P. RaffinH. Y. Shen, C. Y. Tseng

研究成果: 雜誌貢獻會議論文同行評審

2 引文 斯高帕斯(Scopus)

摘要

The GLT project is deploying a new submillimeter (submm) VLBI station in Greenland. Our primary scientific goal is to image a shadow of the supermassive black hole (SMBH) of six billion solar masses in M87 at the center of the Virgo cluster of galaxies. The expected SMBH shadow size of 40-50 μas requires superbly high angular resolution, suggesting that the submm VLBI would be the only way to obtain the shadow image. The Summit station in Greenland enables us to establish baselines longer than 9,000 km with ALMA in Chile and SMA in Hawaii as well as providing a unique u-v coverage for imaging M87. Our VLBI network will achieve a superior angular resolution of about 20 μas at 350 GHz, corresponding to ∼ 2.5 times of the Schwarzschild radius of the supermassive black hole in M87. We have been monitoring the atmospheric opacity at 230 GHz since August. 2011; we have confirmed the value on site during the winter season is comparable to the ALMA site thanks to high altitude of 3,200 m and low temperature of -50 C. We will report current status and future plan of the GLT project towards our expected first light on 2015-2016.

原文英語
文章編號01008
期刊EPJ Web of Conferences
61
DOIs
出版狀態已發佈 - 2013
對外發佈
事件International Symposium on the Innermost Regions of Relativistic Jets and Their Magnetic Fields - Granada, 西班牙
持續時間: 2013 6月 102013 6月 14

ASJC Scopus subject areas

  • 一般物理與天文學

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