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- W4386977892 abstract "We consider a free-falling observer who crosses the event horizon in the Schwarzschild background. In the course of this fall, he/she can receive signals from an object (like a star surface) that emits radiation. We study how the frequency received by an observer changes depending on the proper time on his/her trajectory. The scenarios are classified depending on whether the frequency is infinite, finite or zero near the singularity and the horizon. This depends crucially on the angular momenta of an observer and a photon. In this work we consider also emission process, and, as we show, conditions of emission strongly influence parameters of a photon, and thus received frequency. As one of our main results, we present numerical calculations showing evolution of the received frequency during the process of diving into a black hole, depending on parameters of an observer and emitter. We also analyze how a falling observer will see a night sky as he/she approaches the singularity. We show that there appear several blind zones, which were not analyzed previously." @default.
- W4386977892 created "2023-09-23" @default.
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- W4386977892 date "2023-09-21" @default.
- W4386977892 modified "2023-10-18" @default.
- W4386977892 title "Dynamics of redshift/blueshift during free fall under the Schwarzschild horizon" @default.
- W4386977892 doi "https://doi.org/10.48550/arxiv.2309.12175" @default.
- W4386977892 hasPublicationYear "2023" @default.
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