Crescent Black Hole Images



Playing this video requires the latest flash player from Adobe.

Download link (right click and 'save-as') for playing in VLC or other compatible player.


Recording Details

Speaker(s): 
Scientific Areas: 
Collection/Series: 
PIRSA Number: 
14110108

Abstract

Maximizing the science return on the Event Horizon Telescope project requires fitting models for spatially resolved black hole images to the data. These images can be calculated from accretion and jet theory, but theoretical uncertainties lead to systematic errors in the predicted images. In many cases, however, the images are dominated by the combined effects of Doppler beaming and light bending, leading to a characteristic “crescent” shape. I will discuss a geometric crescent model for black hole images based on these effects. The crescent outperforms other simple geometric shapes in the description of current data, can be used to simulate future EHT observations, and has implications for detecting a black hole shadow.