THE POSSIBILITY OF OBSERVING PHOTON RINGS USING HIGH FREQUENCY VERY LONG BASELINE SPACE RADIO INTERFEROMETRY

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Аннотация

The paper examines the possibility of observing photon rings in the close vicinity of supermassive black holes using very long baseline space radio interferometry at a frequency of 600 GHz. The 600 GHz range is promising for such observations in very long baseline radio interferometry, because high frequency reduces the contribution of radio emission scattering by the interstellar medium, and also makes it possible to increase the angular resolution of the interferometer. High angular resolution and low scattering, in turn, suggest the possible detection of photon rings in the close vicinity of supermassive black holes. To assess such possibilities, modeling of the visibility amplitude distribution from the baseline projection was performed, taking into account various possible sensitivity parameters of the interferometer. Based on the results, the prospects for the 600 GHz range in terms of observing photon rings are shown. In addition, the requirements for the on-board receiving complex of a space interferometer are formulated, at which detection of photon rings is feasible.

Негізгі сөздер

Авторлар туралы

A. Rudnitskiy

P. N. Lebedev Physical Institute, Russian Academy of Sciences; Kotel’nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences

Email: arud@asc.rssi.ru
Astro Space Center Moscow, Russia; Moscow, Russia

M. Shchurov

P. N. Lebedev Physical Institute, Russian Academy of Sciences

Email: shurovma@lebedev.ru
Astro Space Center Moscow, Russia

A. Khudchenko

P. N. Lebedev Physical Institute, Russian Academy of Sciences; Kotel’nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences

Email: khudchenko@asc.rssi.ru
Astro Space Center Moscow, Russia; Moscow, Russia

T. Syachina

P. N. Lebedev Physical Institute, Russian Academy of Sciences

Email: syachina@asc.rssi.ru
Astro Space Center Moscow, Russia

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