|
| | | | |
| | | |
| Stat |
Members: 3669
Articles: 2'599'751
Articles rated: 2609
18 March 2025 |
|
| | | | |
|
Article overview
| |
|
|
Towards VLBI Observations of Black Hole Structure | | Raúl Carballo-Rubio
; Vitor Cardoso
; Ziri Younsi
; | | Date: |
1 Aug 2022 | | Abstract: | Black holes hold a tremendous discovery potential. In this paper the extent
to which the Event Horizon Telescope and its next generation upgrade can
resolve their structure is quantified. Black holes are characterized by a
perfectly absorptive boundary, with a specific area determined by intrinsic
parameters of the black hole. We use a general parametrization of spherically
symmetric spacetimes describing deviations from this behavior, with parameters
controlling the size of the central object and its interaction with light, in
particular through a specular reflection coefficient $Gamma$ and an intrinsic
luminosity measured as a fraction $eta$ of that of the accretion disc. This
enables us to study exotic compact objects and compare them with black holes in
a model-independent manner. We determine the image features associated with the
existence of a surface in the presence of a geometrically thin and optically
thick accretion disc, identifying requirements for VLBI observations to be able
to cast meaningful constraints on these parameters, in particular regarding
angular resolution and image dynamic range. For face-on observations,
constraints of order $etalesssim 10^{-4}, Gammalesssim 10^{-1}$ are
possible with an enhanced EHT array, imposing strong constraints on the nature
of the central object. | | Source: | arXiv, 2208.00704 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
|
| |
|
|
|
REGISTER