Influence of quintessence dark energy on the shadow of black hole

We investigate the effects of quintessence dark energy on the shadows of black hole, surrounded by various profiles of accretions. For the thin-disk accretion, the images of the black hole comprises the dark region and bright region, including direct emission, lensing rings and photon rings. Althoug...

Full description

Saved in:
Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2020-11, Vol.80 (11), p.1-14, Article 1058
Main Authors: Zeng, Xiao-Xiong, Zhang, Hai-Qing
Format: Article
Language:English
Subjects:
Accretion disks
Astronomy
Astrophysics and Cosmology
Black holes
Dark energy
Doppler effect
Elementary Particles
Emission
Hadrons
Heavy Ions
Horizon
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Photons
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quintessence (cosmology)
Regular Article – Theoretical Physics
Shadows
String Theory
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We investigate the effects of quintessence dark energy on the shadows of black hole, surrounded by various profiles of accretions. For the thin-disk accretion, the images of the black hole comprises the dark region and bright region, including direct emission, lensing rings and photon rings. Although their details depend on the form of the emission, generically, direct emission plays a major role for the observed brightness of the black hole, while the lensing ring makes a small contribution and the photon ring makes a negligible contribution. The existence of a cosmological horizon also plays an important role in the shadows, since the observer in the domain of outer communications is near the cosmological horizon. For spherically symmetric accretion, static and infalling matters are considered. We find that the positions of photon spheres are the same for both static and infalling accretions. However, the observed specific intensity of the image for infalling accretion is darker than for static accretion, due to the Doppler effect of the infalling motion.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-020-08656-7