I. Reconstructing Three-Dimensional Jet Geometry from Two-Dimensional Images
arXiv:2210.03033 · doi: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 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 the knot D region of the jet. We also discuss the next steps in the development of the algorithm.
arXiv commentarXiv admin note: substantial text overlap with arXiv:1702.00534
References in corpus (15)
- emcee: The MCMC Hammer
- Observational Evidence of AGN Feedback
- The Structure of the M87 Jet: A Transition from Parabolic to Conical Streamlines
- Kinematics of the jet in M87 on scales of 100 -- 1000 Schwarzschild radii
- MOJAVE. XVII. Jet Kinematics and Parent Population Properties of Relativistically Beamed Radio-Loud Blazars
- Relativistic Beaming and the Intrinsic Properties of Extragalactic Radio Jets
- Shape: A 3D Modeling Tool for Astrophysics
- Optical Polarization and Spectral Variability in the M87 Jet
- Probing 3D Structure with a Large MUSE Mosaic: Extending the Mass Model of Frontier Field Abell 370
- Optical Proper Motion Measurements of the M87 Jet: New Results from the Hubble Space Telescope
- Wavelet-based decomposition and analysis of structural patterns in astronomical images
- Using Twisted Filaments to Model the Inner Jet in M87
- Jet interactions with a giant molecular cloud in the Galactic centre and ejection of hypervelocity stars
- Multi-Wavelength Polarimetry and Spectral Study of M87 Jet During 2002-2008
- Unveiling the inner morphology and gas kinematics of NGC 5135 with ALMA