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Odyssey: A Public GPU-Based Code for General-Relativistic Radiative Transfer in Kerr Spacetime

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arxiv 1601.02063 v2 pith:KGGVGE34 submitted 2016-01-09 astro-ph.HE astro-ph.IM

Hung-Yi Pu , Kiyun Yun , Ziri Younsi , Suk-Jin Yoon This is my paper · ORCID
classification astro-ph.HEastro-ph.IM
keywords blackodysseykerrholeradiativespacetimetransfercode
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General-relativistic radiative transfer (GRRT) calculations coupled with the calculation of geodesics in the Kerr spacetime are an essential tool for determining the images, spectra and light curves from matter in the vicinity of black holes. Such studies are especially important for ongoing and upcoming millimeter/submillimeter (mm/sub-mm) Very Long Baseline Interferometry (VLBI) observations of the supermassive black holes at the centres of Sgr A^{*} and M87. To this end we introduce Odyssey, a Graphics Processing Unit(GPU)-based code for ray tracing and radiative transfer in the Kerr spacetime. On a single GPU, the performance of Odyssey can exceed 1 nanosecond per photon, per Runge-Kutta integration step. Odyssey is publicly available, fast, accurate, and flexible enough to be modified to suit the specific needs of new users. Along with a Graphical User Interface (GUI) powered by a video-accelerated display architecture, we also present an educational software tool, Odyssey_Edu, for showing in real time how null geodesics around a Kerr black hole vary as a function of black hole spin and angle of incidence onto the black hole.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Construction of an analytic multi-component accretion environment and its application to Kerr black hole imaging

    gr-qc 2026-08 conditional novelty 6.0 of 10

    A fully analytic accretion model combining a thick disk, Gaussian ring bumps, and localized Gaussian spots is applied to Kerr ray tracing, generating images with multiple bright spots and arcs.

  2. Ellis-Bronnikov Wormhole Shadows with Spherically Symmetric Accretion Flow

    gr-qc 2026-06 unverdicted novelty 4.0 of 10

    GRRT simulations of spherically symmetric accretion show the Ellis-Bronnikov wormhole yields brighter shadow and photon ring than Schwarzschild, both consistent with EHT M87* data.

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