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. Raffin; H. Y. Shen; C. Y. Tseng

doi:10.1051/epjconf/20136101008

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

Research output: Contribution to journal › Conference article › peer-review

2 Citations (Scopus)

Abstract

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.

Original language	English
Article number	01008
Journal	EPJ Web of Conferences
Volume	61
DOIs	https://doi.org/10.1051/epjconf/20136101008
Publication status	Published - 2013
Externally published	Yes
Event	International Symposium on the Innermost Regions of Relativistic Jets and Their Magnetic Fields - Granada, Spain Duration: 2013 Jun 10 → 2013 Jun 14

ASJC Scopus subject areas

General Physics and Astronomy

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10.1051/epjconf/20136101008

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Nakamura, M., Algaba, J. C., Asada, K., Chen, B., Chen, M. T., Han, J., Ho, P. H. P., Hsieh, S. N., Huang, T., Inoue, M., Koch, P., Kuo, C. Y., Martin-Cocher, P., Matsushita, S., Meyer-Zhao, Z., Nishioka, H., Nystrom, G., Pradel, N., Pu, H. Y., ... Tseng, C. Y. (2013). Greenland telescope (GLT) Project: "a direct confirmation of black hole with submillimeter VLBI". EPJ Web of Conferences, 61, Article 01008. https://doi.org/10.1051/epjconf/20136101008

Nakamura, M, Algaba, JC, Asada, K, Chen, B, Chen, MT, Han, J, Ho, PHP, Hsieh, SN, Huang, T, Inoue, M, Koch, P, Kuo, CY, Martin-Cocher, P, Matsushita, S, Meyer-Zhao, Z, Nishioka, H, Nystrom, G, Pradel, N, Pu, HY, Raffin, P, Shen, HY & Tseng, CY 2013, 'Greenland telescope (GLT) Project: "a direct confirmation of black hole with submillimeter VLBI"', EPJ Web of Conferences, vol. 61, 01008. https://doi.org/10.1051/epjconf/20136101008

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title = "Greenland telescope (GLT) Project: {"}a direct confirmation of black hole with submillimeter VLBI{"}",

abstract = "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.",

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

year = "2013",

doi = "10.1051/epjconf/20136101008",

language = "English",

volume = "61",

journal = "EPJ Web of Conferences",

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note = "International Symposium on the Innermost Regions of Relativistic Jets and Their Magnetic Fields ; Conference date: 10-06-2013 Through 14-06-2013",

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T1 - Greenland telescope (GLT) Project

T2 - International Symposium on the Innermost Regions of Relativistic Jets and Their Magnetic Fields

AU - Nakamura, M.

AU - Algaba, J. C.

AU - Asada, K.

AU - Chen, B.

AU - Chen, M. T.

AU - Han, J.

AU - Ho, P. H.P.

AU - Hsieh, S. N.

AU - Huang, T.

AU - Inoue, M.

AU - Koch, P.

AU - Kuo, C. Y.

AU - Martin-Cocher, P.

AU - Matsushita, S.

AU - Meyer-Zhao, Z.

AU - Nishioka, H.

AU - Nystrom, G.

AU - Pradel, N.

AU - Pu, H. Y.

AU - Raffin, P.

AU - Shen, H. Y.

AU - Tseng, C. Y.

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

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JF - EPJ Web of Conferences

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Y2 - 10 June 2013 through 14 June 2013

ER -

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

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