دورية أكاديمية
Selective Dynamical Imaging of Interferometric Data
| العنوان: | Selective Dynamical Imaging of Interferometric Data |
|---|---|
| المؤلفون: | Farah, Joseph, Galison, Peter, Akiyama, Kazunori, Bouman, Katherine L., Bower, Geoffrey C., Chael, Andrew, Fuentes, Antonio, Gómez, José L., Honma, Mareki, Johnson, Michael D., Kofuji, Yutaro, Marrone, Daniel P., Moriyama, Kotaro, Narayan, Ramesh, Pesce, Dominic W., Tiede, Paul, Wielgus, Maciek, Zhao, Guang Yao, Alberdi, Antxon, Alef, Walter, Algaba, Juan Carlos, Anantua, Richard, Asada, Keiichi, Azulay, Rebecca, Baczko, Anne Kathrin, Ball, David, Baloković, Mislav, Barrett, John, Benson, Bradford A., Bintley, Dan, Blackburn, Lindy, Blundell, Raymond, Boland, Wilfred, Boyce, Hope, Bremer, Michael, Brinkerink, Christiaan D., Brissenden, Roger, Britzen, Silke, Broderick, Avery E., Broguiere, Dominique, Bronzwaer, Thomas, Bustamente, Sandra, Byun, Do Young, Carlstrom, John E., Chan, Chi Kwan, Chatterjee, Koushik, Kim, Dong Jin, Ramakrishnan, Venkatessh, Savolainen, Tuomas, Wagner, Jan, Event Horizon Telescope Collaborat |
| المساهمون: | Department of Electronics and Nanoengineering, Metsähovi Radio Observatory, Anne Lähteenmäki Group, Las Cumbres Observatory Global Telescope Network, Harvard University, Academia Sinica Institute of Astronomy and Astrophysics, Princeton University, CSIC - Institute of Astrophysics of Andalusia, National Astronomical Observatory of Japan, University of Arizona, Massachusetts Institute of Technology MIT, University of Waterloo, University of Malaya, Universidad de Valencia, Fermi National Accelerator Laboratory, East Asian Observatory, Nederlandse Onderzoekschool voor Astronomie, McGill University, Institut de Radioastronomie Millimétrique, Radboud University Nijmegen, University of Massachusetts, Korea Astronomy and Space Science Institute, University of Chicago, University of Amsterdam, Science Support Office, Universidad de Concepción, Aalto-yliopisto, Aalto University |
| بيانات النشر: | IOP Publishing Ltd. |
| سنة النشر: | 2022 |
| المجموعة: | Aalto University Publication Archive (Aaltodoc) / Aalto-yliopiston julkaisuarkistoa |
| الوصف: | Funding Information: We thank the National Science Foundation (awards OISE-1743747, AST-1816420, AST-1716536, AST-1440254, AST-1935980) and the Gordon and Betty Moore Foundation (GBMF-5278) for financial support of this work. This work was supported in part by the Black Hole Initiative, which is funded by grants from the John Templeton Foundation and the Gordon and Betty Moore Foundation to Harvard University. Support for this work was also provided by the NASA Hubble Fellowship grant HST-HF2-51431.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. Publisher Copyright: © 2022. The Author(s) ; Recent developments in very long baseline interferometry (VLBI) have made it possible for the Event Horizon Telescope (EHT) to resolve the innermost accretion flows of the largest supermassive black holes on the sky. The sparse nature of the EHT's (u, v)-coverage presents a challenge when attempting to resolve highly time-variable sources. We demonstrate that the changing (u, v)-coverage of the EHT can contain regions of time over the course of a single observation that facilitate dynamical imaging. These optimal time regions typically have projected baseline distributions that are approximately angularly isotropic and radially homogeneous. We derive a metric of coverage quality based on baseline isotropy and density that is capable of ranking array configurations by their ability to produce accurate dynamical reconstructions. We compare this metric to existing metrics in the literature and investigate their utility by performing dynamical reconstructions on synthetic data from simulated EHT observations of sources with simple orbital variability. We then use these results to make recommendations for imaging the 2017 EHT Sgr A* data set. ; Peer reviewed |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | 1-21; application/pdf |
| اللغة: | English |
| تدمد: | 2041-8205 2041-8213 |
| العلاقة: | Astrophysical Journal Letters; Volume 930, issue 2; Farah, J, Galison, P, Akiyama, K, Bouman, K L, Bower, G C, Chael, A, Fuentes, A, Gómez, J L, Honma, M, Johnson, M D, Kofuji, Y, Marrone, D P, Moriyama, K, Narayan, R, Pesce, D W, Tiede, P, Wielgus, M, Zhao, G Y, Alberdi, A, Alef, W, Algaba, J C, Anantua, R, Asada, K, Azulay, R, Baczko, A K, Ball, D, Baloković, M, Barrett, J, Benson, B A, Bintley, D, Blackburn, L, Blundell, R, Boland, W, Boyce, H, Bremer, M, Brinkerink, C D, Brissenden, R, Britzen, S, Broderick, A E, Broguiere, D, Bronzwaer, T, Bustamente, S, Byun, D Y, Carlstrom, J E, Chan, C K, Chatterjee, K, Kim, D J, Ramakrishnan, V, Savolainen, T, Wagner, J & Event Horizon Telescope Collaboration 2022, ' Selective Dynamical Imaging of Interferometric Data ', Astrophysical Journal Letters, vol. 930, no. 2, L18, pp. 1-21 . https://doi.org/10.3847/2041-8213/ac6615Test; PURE UUID: 4345becb-6d33-48b4-8c78-cad88ab159ee; PURE ITEMURL: https://research.aalto.fi/en/publications/4345becb-6d33-48b4-8c78-cad88ab159eeTest; PURE LINK: http://www.scopus.com/inward/record.url?scp=85130725214&partnerID=8YFLogxKTest; PURE FILEURL: https://research.aalto.fi/files/86399228/Selective_Dynamical_Imaging_of_Interferometric_Data.pdfTest; https://aaltodoc.aalto.fi/handle/123456789/115743Test; URN:NBN:fi:aalto-202208104565 |
| DOI: | 10.3847/2041-8213/ac6615 |
| الإتاحة: | https://doi.org/10.3847/2041-8213/ac6615Test https://aaltodoc.aalto.fi/handle/123456789/115743Test |
| حقوق: | openAccess |
| رقم الانضمام: | edsbas.883B0B37 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 20418205 20418213 |
|---|---|
| DOI: | 10.3847/2041-8213/ac6615 |