The DOI matches its Crossref record; 4 of the 4 references it cites were found in a registry or an index.
Imaging the Schwarzschild-radius-scale Structure of M87 with the Event Horizon Telescope Using Sparse Modeling
Open accessAbstract
We propose a new imaging technique for radio and optical/infrared interferometry. The proposed technique reconstructs the image from the visibility amplitude and closure phase, which are standard data products of short-millimeter very long baseline interferometers such as the Event Horizon Telescope (EHT) and optical/infrared interferometers, by utilizing two regularization functions: the ℓ 1-norm and total variation (TV) of the brightness distribution. In the proposed method, optimal regularization parameters, which represent the sparseness and effective spatial resolution of the image, are derived from data themselves using cross-validation (CV). As an application of this technique, we present simulated observations of M87 with the EHT based on four physically motivated models. We confirm that ℓ 1 + TV regularization can achieve an optimal resolution of ∼20%–30% of the diffraction limit λ/D max, which is the nominal spatial resolution of a radio interferometer. With the proposed technique, the EHT can robustly and reasonably achieve super-resolution sufficient to clearly resolve the black hole shadow. These results make it promising for the EHT to provide an unprecedented view of the event-horizon-scale structure in the vicinity of the supermassive black hole in M87 and also the Galactic center Sgr A*.
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Cites
Image quality assessment: from error visibility to structural similarity
Wang, Z., Bovik, A. C., Sheikh, H. R., & Simoncelli, E. P. (2004) · IEEE Transactions on Image Processing · doi:10.1109/tip.2003.819861 · Cited by 57,892
Jennison, R. C. (1958) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/118.3.276 · Cited by 400
Resolved magnetic-field structure and variability near the event horizon of Sagittarius A*
Johnson, M. D., Fish, V. L., Doeleman, S. S., Marrone, D. P., Plambeck, R. L., Wardle, J. F. C., Akiyama, K., Asada, K., Beaudoin, C., Blackburn, L., et al. (2015) · Science · doi:10.1126/science.aac7087 · Cited by 217
Self-citationFish, V. L., Doeleman, S. S., Beaudoin, C., Blundell, R., Bolin, D. E., Bower, G. C., Chamberlin, R., Freund, R., Friberg, P., Gurwell, M. A., et al. (2011) · The Astrophysical Journal · doi:10.1088/2041-8205/727/2/l36 · Cited by 214
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Cited by
First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
The Event Horizon Telescope Collaboration, Akiyama, K., Alberdi, A., Alef, W., Asada, K., Azulay, R., Baczko, A.-K., Ball, D., Baloković, M., Barrett, J., et al. (2019) · The Astrophysical Journal Letters · doi:10.3847/2041-8213/ab0ec7 · Cited by 4,205
Self-citationEvent Horizon Telescope Collaboration, Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A.-K., et al. (2022) · The Astrophysical Journal Letters · doi:10.3847/2041-8213/ac6429 · Cited by 449
Self-citationEvent Horizon Telescope Collaboration, Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A.-K., et al. (2022) · The Astrophysical Journal Letters · doi:10.3847/2041-8213/ac6736 · Cited by 369
“…one sampling-based posterior exploration algorithm (THEMIS; Broderick et al. 2020a, 2020b), one CLEAN-based deconvolution algorithm (DIFMAP; Shepherd 1997), and two “regularized maximum likelihood” (RML) algorithms (eht-imaging,Chael et al. 2016, 2018; SMILI, Akiyama et al. 2017a, 2017b).”
MethodInfluentialSelf-citationVariational Image Feature Extraction for the Event Horizon Telescope
Tiede, P., Broderick, A. E., & Palumbo, D. C. M. (2022) · The Astrophysical Journal · doi:10.3847/1538-4357/ac3a6b · Cited by 29
Metadata
- Authors
- Akiyama, K., Kuramochi, K., Ikeda, S., Fish, V. L., Tazaki, F., Honma, M., Doeleman, S. S., E. Broderick, A., Dexter, J., Mościbrodzka, M., Bouman, K. L., A. Chael, A., & Zaizen, M.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2017-03-17
- Volume
- 838
- Issue
- 1
- Pages
- 1
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2594279543
- Cited by
- 173
- References
- 4
- FWCI
- 9.00
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Akiyama, K., Kuramochi, K., Ikeda, S., Fish, V. L., Tazaki, F., Honma, M., Doeleman, S. S., E. Broderick, A., Dexter, J., Mościbrodzka, M., Bouman, K. L., A. Chael, A., & Zaizen, M. (2017). Imaging the Schwarzschild-radius-scale Structure of M87 with the Event Horizon Telescope Using Sparse Modeling. The Astrophysical Journal. https://doi.org/10.3847/1538-4357/aa6305
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