An iterative reconstruction algorithm for Faraday tomography

Suchetha Cooray

doi:10.1093/mnras/staa3580

2020-11-20

DOI：10.1093/mnras/staa3580

原文链接

查看原文

摘要

En 中文

Faraday tomography offers crucial information on the magnetized astronomical objects, such as quasars, galaxies, or galaxy clusters, by observing its magnetoionic media. The observed linear polarization spectrum is inverse Fourier transformed to obtain the Faraday dispersion function (FDF), providing us a tomographic distribution of the magnetoionic media along the line of sight. However, this transform gives a poor reconstruction of the FDF because of the instrument's limited wavelength coverage. The current Faraday tomography techniques' inability to reliably solve the above inverse problem has noticeably plagued cosmic magnetism studies. We propose a new algorithm inspired by the well-studied area of signal restoration, called the Constraining and Restoring iterative Algorithm for Faraday Tomography (CRAFT). This iterative model-independent algorithm is computationally inexpensive and only requires weak physically motivated assumptions to produce high fidelity FDF reconstructions. We demonstrate an application for a realistic synthetic model FDF of the MilkyWay, where CRAFT shows greater potential over other popular model-independent techniques. The dependence of observational frequency coverage on the various techniques' reconstruction performance is also demonstrated for a simpler FDF. CRAFT exhibits improvements even over model-dependent techniques (i.e. QU-fitting) by capturing complex multiscale features of the FDF amplitude and polarization angle variations within a source. The proposed approach will be of utmost importance for future cosmic magnetism studies, especially with broad-band polarization data from the Square Kilometre Array and its precursors. We make the CRAFT code publicly available.

Keyword:

magnetic fields

polarization

methods: data analysis

techniques: interferometric

techniques: polarimetric

AI总结

对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。

期刊

Monthly Notices of the Royal Astronomical Society

IF:

4.8

论文数:

7.1W

被引数:

25.0W

机构

national institutes of natural sciences (nins) - japan

学者数:

8.6K

论文数: 9.1K

被引数: 3

Nagoya University

学者数:

3.3W

论文数: 2.5W

被引数: 2.6W

institute of statistical mathematics (ism) - japan

学者数:

347

论文数: 320

被引数: 0

national astronomical observatory of japan (naoj)

学者数:

4.1K

论文数: 3.3K

被引数: 3

查看更多机构

引用论文

Historical climatology ‐ a state of the art review

Weather

IF0

2008-07-04

PREAI

Phil Jones

A phase II trial to evaluate pemetrexed clinical responses in relation to tumor methylthioadenosine phosphorylase (MTAP) gene status in patients with previously treated metastatic urothelial carcinoma.

Journal of Clinical Oncology

IF0

2019-03-01

PREAI

Omar Alhalabi; Matthew T Campbell; Rebecca Slack-Tidwell; Arlene O. Siefker-Radtke; Amishi Yogesh Shah; Eleni Efstathiou; Wei-Lien Wang; Mark Anton Titus; Bogdan Czerniak; Miao Zhang; Charles Guo; Christopher Logothetis; Jianjun Gao

SPARSE FARADAY ROTATION MEASURE SYNTHESIS

ASTRONOMICAL JOURNAL

IF5.1

2011-12-27

OAAI

Andrecut, M.; Stil, J. M.; Taylor, A. R.

LOFAR: The LOw-Frequency ARray LOFAR: 低频阵列

ASTRONOMY & ASTROPHYSICS

IF5.8

2013-07-16

1.7K

OAAI

van Haarlem, M. P.; Wise, M. W.; Gunst, A. W.; Heald, G.; McKean, J. P.; Hessels, J. W. T.; de Bruyn, A. G.; Nijboer, R.; Swinbank, J.; Fallows, R.; Brentjens, M.; Nelles, A.; Beck, R.; Falcke, H.; Fender, R.; Horandel, J.; Koopmans, L. V. E.; Mann, G.; Miley, G.; Rottgering, H.; Stappers, B. W.; Wijers, R. A. M. J.; Zaroubi, S.; van den Akker, M.; Alexov, A.; Anderson, J.; Anderson, K.; van Ardenne, A.; Arts, M.; Asgekar, A.; Avruch, I. M.; Batejat, F.; Bahren, L.; Bell, M. E.; Bell, M. R.; van Bemmel, I.; Bennema, P.; Bentum, M. J.; Bernardi, G.; Best, P.; Birzan, L.; Bonafede, A.; Boonstra, A. -J.; Braun, R.; Bregman, J.; Breitling, F.; van de Brink, R. H.; Broderick, J.; Broekema, P. C.; Brouw, W. N.; Brueggen, M.; Butcher, H. R.; van Cappellen, W.; Ciardi, B.; Coenen, T.; Conway, J.; Coolen, A.; Corstanje, A.; Damstra, S.; Davies, O.; Deller, A. T.; Dettmar, R. -J.; van Diepen, G.; Dijkstra, K.; Donker, P.; Doorduin, A.; Dromer, J.; Drost, M.; van Duin, A.; Eisloeffel, J.; van Enst, J.; Ferrari, C.; Frieswijk, W.; Gankema, H.; Garrett, M. A.; de Gasparin, F.; Gerbers, M.; de Geus, E.; Griessmeier, J. -M.; Grit, T.; Gruppen, P.; Hamaker, J. P.; Hassall, T.; Hoeft, M.; Holties, H. A.; Horneffer, A.; van der Horst, A.; van Houwelingen, A.; Huijgen, A.; Iacobelli, M.; Intema, H.; Jackson, N.; Jelic, V.; de Jong, A.; Kant, D.; Karastergiou, A.; Koers, A.; Kollen, H.; Kondratiev, V. I.; Kooistra, E.; Koopman, Y.; Koster, A.; Kuniyoshi, M.; Kramer, M.; Kuper, G.; Lambropoulos, P.; Law, C.; van Leeuwen, J.; Lemaitre, J.; Loose, M.; Maat, P.; Macario, G.; Markoff, S.; Masters, J.; McFadden, R. A.; McKay-Bukowski, D.; Meijering, H.; Meulman, H.; Mevius, M.; Millenaar, R.; Miller-Jones, J. C. A.; Mohan, R. N.; Mol, J. D.; Morawietz, J.; Morganti, R.; Mulcahy, D. D.; Mulder, E.; Munk, H.; Nieuwenhuis, L.; van Nieuwpoort, R.; Noordam, J. E.; Norden, M.; Noutsos, A.; Offringa, A. R.; Olofsson, H.; Omar, A.; Orru, E.; Overeem, R.; Paas, H.; Pandey-Pommier, M.; Pandey, V. N.; Pizzo, R.; Polatidis, A.; Rafferty, D.; Rawlings, S.; Reich, W.; de Reijer, J. -P.; Reitsma, J.; Renting, G. A.; Riemers, P.; Rol, E.; Romein, J. W.; Roosjen, J.; Ruiter, M.; Scaife, A.; van der Schaaf, K.; Scheers, B.; Schellart, P.; Schoenmakers, A.; Schoonderbeek, G.; Serylak, M.; Shulevski, A.; Sluman, J.; Smirnov, O.; Sobey, C.; Spreeuw, H.; Steinmetz, M.; Sterks, C. G. M.; Stiepel, H. -J.; Stuurwold, K.; Tagger, M.; Tang, Y.; Tasse, C.; Thomas, I.; Thoudam, S.; Toribio, M. C.; van der Tol, B.; Usov, O.; van Veelen, M.; van der Veen, A. -J.; ter Veen, S.; Verbiest, J. P. W.; Vermeulen, R.; Vermaas, N.; Vocks, C.; Vogt, C.; de Vos, M.; van der Wal, E.; van Weeren, R.; Weggemans, H.; Weltevrede, P.; White, S.; Wijnholds, S. J.; Wilhelmsson, T.; Wucknitz, O.; Yatawatta, S.; Zarka, P.; Zensus, A.; van Zwieten, J.

A pi-calculus based semantics for WS-BPEL

The Journal of Logic and Algebraic Programming

IF0

2007-01-01

OAAI

Roberto Lucchi; Manuel Mazzara

An optimum solution to the firing squad synchronization problem

Information and Control

IF0

1966-02-01

PREAI

Abraham Waksman

High prevalence of lateral knee osteoarthritis in Beijing Chinese compared with Framingham Caucasian subjects

Arthritis & Rheumatism

IF0

2002-05-08

PREAI

David T. Felson; Michael C. Nevitt; Yuqing Zhang; Piran Aliabadi; Bridget Baumer; Daniel Gale; Wei Li; Wei Yu; Ling Xu

The Karl G. Jansky Very Large Array Sky Survey (VLASS). Science Case and Survey Design

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC

IF7.7

2020-01-28

501

OAAI

Lacy, M.; Baum, S. A.; Chandler, C. J.; Chatterjee, S.; Clarke, T. E.; Deustua, S.; English, J.; Farnes, J.; Gaensler, B. M.; Gugliucci, N.; Hallinan, G.; Kent, B. R.; Kimball, A.; Law, C. J.; Lazio, T. J. W.; Marvil, J.; Mao, S. A.; Medlin, D.; Mooley, K.; Murphy, E. J.; Myers, S.; Osten, R.; Richards, G. T.; Rosolowsky, E.; Rudnick, L.; Schinzel, F.; Sivakoff, G. R.; Sjouwerman, L. O.; Taylor, R.; White, R. L.; Wrobel, J.; Andernach, H.; Beasley, A. J.; Berger, E.; Bhatnagar, S.; Birkinshaw, M.; Bower, G. C.; Brandt, W. N.; Brown, S.; Burke-Spolaor, S.; Butler, B. J.; Comerford, J.; Demorest, P. B.; Fu, H.; Giacintucci, S.; Golap, K.; Guth, T.; Hales, C. A.; Hiriart, R.; Hodge, J.; Horesh, A.; Ivezic, Z.; Jarvis, M. J.; Kamble, A.; Kassim, N.; Liu, X.; Loinard, L.; Lyons, D. K.; Masters, J.; Mezcua, M.; Moellenbrock, G. A.; Mroczkowski, T.; Nyland, K.; O'Dea, C. P.; O'Sullivan, S. P.; Peters, W. M.; Radford, K.; Rao, U.; Robnett, J.; Salcido, J.; Shen, Y.; Sobotka, A.; Witz, S.; Vaccari, M.; van Weeren, R. J.; Vargas, A.; Williams, P. K. G.; Yoon, I

Electrocardiographic effect of artemisinin-piperaquine, dihydroartemisinin-piperaquine, and artemether-lumefantrine treatment in falciparum malaria patients

Revista da Sociedade Brasileira de Medicina Tropical

IF0

2021-01-01

OAAI

Wanting Wu; Chenguang Lu; Yuan Liang; Hongying Zhang; Changsheng Deng; Qi Wang; Qin Xu; Bo Tan; Chongjun Zhou; Jianping Song

CONSTRAINED ITERATIVE RESTORATION ALGORITHMS

PROCEEDINGS OF THE IEEE

IF25.9

1981-01-01

282

PREAI

SCHAFER, RW; MERSEREAU, RM; RICHARDS, MA

查看更多内容