A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Black Hole Shadow Drift and Photon Ring Frequency Drift (2021)

Frion, E., Giani, L., & Miranda, T. (2021). Black Hole Shadow Drift and Photon Ring Frequency Drift. Open Journal of Astrophysics, 4(1). https://doi.org/10.21105/astro.2107.13526

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Frion, Emmanuel; Giani, Leonardo; Miranda, Tays

Lehti tai sarja: Open Journal of Astrophysics

eISSN: 2565-6120

Julkaisuvuosi: 2021

Ilmestymispäivä: 14.09.2021

Volyymi: 4

Lehden numero: 1

Kustantaja: Maynooth Academic Publishing

Julkaisumaa: Irlanti

Julkaisun kieli: englanti

DOI: https://doi.org/10.21105/astro.2107.13526

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/79513

Julkaisu on rinnakkaistallennettu: https://arxiv.org/abs/2107.13536v2

Tiivistelmä

The apparent angular size of the shadow of a black hole in an expanding Universe is redshift-dependent. Since cosmological redshifts change with time - known as the redshift drift - all redshift-dependent quantities acquire a time dependence, and a fortiori so do black hole shadows. We find a mathematical description of the black hole shadow drift and show that the amplitude of this effect is of order 10−16 per day for M87? . While this effect is small, we argue that its non-detection can be used to constrain the accretion rate around supermassive black holes, as well as a novel probe of the equivalence principle. If general relativity is assumed, we infer from the data obtained by the Event Horizon Telescope for M87? a maximum accretion rate of |M /M˙ | ≤ 105M per year. On the other hand, in the case of an effective gravitation coupling, we derive a constraint of |G/G ˙ | ≤ 10−3 − 10−4 per year. The effect of redshift drift on the visibility amplitude and frequency of the universal interferometric signatures of photon rings is also discussed, which we show to be very similar to the shadow drift. This is of particular interest for future experiments involving spectroscopic and interferometric techniques, which could make observations of photon rings and their frequency drifts viable.

YSO-asiasanat: maailmankaikkeus; mustat aukot; kosmologia; suhteellisuusteoria; avaruus; valo; varjot; fysiikka; avaruustutkimus

Liittyvät organisaatiot

OKM-raportointi: Kyllä

Raportointivuosi: 2021

JUFO-taso: 1