Development of new imaging tehchnique for sub-mm VLBI
Project/Area Number |
24540242
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Astronomy
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Research Institution | National Astronomical Observatory of Japan |
Principal Investigator |
HONMA Mareki 国立天文台, 水沢VLBI観測所, 教授 (20332166)
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Co-Investigator(Renkei-kenkyūsha) |
NAGAI Hiroshi 国立天文台, チリ観測所, 特任准教授 (00455198)
OYAMA Tomoaki 国立天文台, 水沢VLBI観測所, 専門研究職員 (70425403)
KAWABE Ryohei 国立天文台, 電波研究部, 教授 (10195141)
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Research Collaborator |
AKIYAMA Kazunori
TAZAKI Fumie
HADA Kazuhiro
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Project Period (FY) |
2012-04-01 – 2015-03-31
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Project Status |
Completed (Fiscal Year 2014)
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Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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Keywords | ブラックホール / 活動銀河中心核 / 電波天文学 / 超長基線電波干渉計 / サブミリ波 / イメージング / 国際情報交換:アメリカ合衆国 / 国際情報交換(米国) |
Outline of Final Research Achievements |
In order to realize imaging with sub-mm VLBI using visibility phase information, we have explored imaging technique based on simulation data as well as real observational data of mm-VLBI. The methods we have considered include model fitting with least-square method, model estimation with Markov Chain Monte Carlo method, compressive sensing and so on. We have applied these methods to the real data of mm-VLBI observations, and for the first time successfully detected the radio core of M87 at 1 mm with a size of 5.5 Schwarzschild radii and also closure phase information on M87, which leaded us one step closer to the direct imaging of black hole shadows with sub-mm VLBI.
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Report
(4 results)
Research Products
(20 results)
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[Journal Article] A Strong Radio Brightening at the Jet Base of M 87 during the Elevated Very High Energy Gamma-Ray State in 20122014
Author(s)
Hada, K.; Giroletti, M.; Kino, M.; Giovannini, G.; D'Ammando, F.; Cheung, C. C.; Beilicke, M.; Nagai, H.; Doi, A.; Akiyama, K.; Honma, M.; Niinuma, K.; Casadio, C.; Orienti, M.; Krawczynski, H.; Gomez, J. L.; Sawada-Satoh, S.; Koyama, S.; Cesarini, A.; Nakahara, S.; Gurwell, M. A.
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Journal Title
The Astrophysical Journal
Volume: 788
Issue: 2
Pages: 165-177
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Evidence for a Nuclear Radio Jet and its Structure down to lsim100 Schwarzschild Radii in the Center of the Sombrero Galaxy (M 104, NGC 4594)2013
Author(s)
Hada, K., Doi, A., Nagai, H., Inoue, M., Honma, M., Giroletti, M., Giovannini, G.
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Journal Title
The Astrophysical Journal
Volume: 779
Issue: 1
Pages: 6-18
DOI
Related Report
Peer Reviewed
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[Journal Article] The Innermost Collimation Structure of the M87 Jet Down to ~10 Schwarzschild Radii2013
Author(s)
Hada, K., Kino, M., Doi, A., Nagai, H., Honma, M., Hagiwara, Y., Giroletti, M., Giovannini, G., Kawaguchi, N.
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Journal Title
The Astrophysical Journal
Volume: 775
Issue: 1
Pages: 70-76
DOI
Related Report
Peer Reviewed
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[Journal Article] Fine-scale Structure of the Quasar 3C 279 Measured with 1.3 mm Very Long Baseline Interferometry2013
Author(s)
Lu, R., Fish, V., Akiyama, K., Doeleman, S., Algaba, J., Bower, G., Brinkerink, C., Chamberlin, R., Crew, G., Cappallo, R., Dexter, M., Freund, R., Friberg, P., Gurwell, M., Ho, P., Honma, M., et al
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Journal Title
The Astrophysical Journal
Volume: 772 Issue 1
Issue: 1
Pages: 10-10
DOI
Related Report
Peer Reviewed
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[Journal Article] Multifrequency VLBI Observations of the Broad Absorption Line Quasar J1020+4320: Recently Restarted Jet Activity?2013
Author(s)
Doi A., Murata Y., Mochizuki N., Takeuchi H., Asada K., Hayashi TJ., Nagai H., Shibata KM., Oyama T., Jike T., et al.
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Journal Title
Publications of the Astronomical Society of Japan
Volume: 65
Issue: 3
DOI
Related Report
Peer Reviewed
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[Journal Article] Jet launching structure resolved near the supermassive black hole in M872012
Author(s)
Doeleman S. S., Fish V., Schenck D. E., Beaudoin C., Blundell R., Bower G. C., Broderick A. E., Chamberlin R., Freund R., Friberg P., Gurwell M. A., Ho P. T. P., Honma M., et al.
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Journal Title
Science
Volume: 338
Issue: 6105
Pages: 355-358
DOI
Related Report
Peer Reviewed
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