Modeling the shadow of Sgr A* through an eclipsing black hole

2025/02/22 by Milton Jair Santibañez-Armenta, Gustavo Magallanes-Guijón, Sergio Mendoza +1 · 3 voices
#astro-ph.HE #gr-qc

paper · pdf · doi:10.1093/mnrasl/slaf033

Abstract

The Event Horizon Telescope (EHT) observations of Sgr A* resolved the shadow image and emission ring-like structure, which is associated to the photon ring of the supermassive black hole, at the galactic centre, revealing a diameter of 51.8~μas. The ring-like structure is consistent with that of a Kerr black hole. However, the source of the high bright regions in the image and the time variability remain an open question. Besides the plasma properties and emission models, the spacetime geometry also holds an important role. We present an image depicting the bright hot spots consistent with Sgr A* observations at a wavelength λ= 1.3 \rm mm. The image is the result of an eclipsing Schwarzschild black hole situated along the line of sight between the galactic centre and Earth. The separation from both, primary (Sgr A*) and secondary (eclipsing) black holes is 10233 \rm AU. The central supermassive black hole located at the centre of the galaxy has an observational mass of 4.14×10⁶ M_\odot and the secondary eclipsing black hole has an inferred mass of 1035 M_\odot.

Discussions

• #arXiv Modeling the shadow of Sgr A* through an eclipsing black hole https://arxiv.org/abs/2502.16058 The separation from both, primary (Sgr A*) and secondary (eclipsing) black holes is 10233 AU. The [bsky, 10 points, 2 comments]
• #arXiv Modeling the shadow of Sgr A* through an eclipsing black hole https://arxiv.org/abs/2502.16058 The separation from both, primary (Sgr A*) and secondary (eclipsing) black holes is 10233 AU. The [bsky, 0 points, 0 comments]
• # arXiv Modeling the shadow of Sgr A* through an eclipsing black hole https:// arxiv.org/abs/2502.16058 The separation from both, primary (Sgr A*) and secondary (eclipsing) black holes is 10233 AU. Th [mastodon, 0 points, 0 comments]

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