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JetCurry I. Reconstructing three-dimensional jet geometry from two-dimensional images
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Sawant, S. M., Kosak, K., Li, K., Avachat, S. S., Perlman, E. S. and Mitra, D. (2022) JetCurry I. Reconstructing three-dimensional jet geometry from two-dimensional images. Astronomy and Computing, 41 . 100653. doi:10.1016/j.ascom.2022.100653 ISSN 2213-1337.
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Official URL: http://doi.org/10.1016/j.ascom.2022.100653
Abstract
We present a three-dimensional (3-D) visualization of jet geometry using numerical methods based on a Markov Chain Monte Carlo (MCMC) and limited memory Broyden–Fletcher–Goldfarb–Shanno (BFGS) optimized algorithm. Our aim is to visualize the 3-D geometry of an active galactic nucleus (AGN) jet using observations, which are inherently two-dimensional (2-D) images. Many AGN jets display complex structures that include hotspots and bends. The structure of these bends in the jet’s frame may appear quite different than what we see in the sky frame, where it is transformed by our particular viewing geometry. The knowledge of the intrinsic structure will be helpful in understanding the appearance of the magnetic field and hence emission and particle acceleration processes over the length of the jet. We present the JetCurry algorithm to visualize the jet’s 3-D geometry from its 2-D image. We discuss the underlying geometrical framework and outline the method used to decompose the 2-D image. We report the results of our 3-D visualization of the jet of M87, using the test case of the knot D region. Our 3-D visualization is broadly consistent with the expected double helical magnetic field structure of knot D region of the jet. We also discuss the next steps in the development of the JetCurry algorithm.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QA Mathematics Q Science > QB Astronomy T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
Library of Congress Subject Headings (LCSH): | Jets (Nuclear physics), Galaxies, Active galaxies, Three-dimensional imaging, Markov processes, Monte Carlo method | ||||||||
Journal or Publication Title: | Astronomy and Computing | ||||||||
Publisher: | Elsevier BV | ||||||||
ISSN: | 2213-1337 | ||||||||
Official Date: | October 2022 | ||||||||
Dates: |
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Volume: | 41 | ||||||||
Article Number: | 100653 | ||||||||
DOI: | 10.1016/j.ascom.2022.100653 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||
Date of first compliant deposit: | 30 November 2022 | ||||||||
Date of first compliant Open Access: | 30 November 2022 | ||||||||
RIOXX Funder/Project Grant: |
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