This is a new image of the Hubble Ultra Deep Field. The first deep imaging of the field was done with Hubble in 2004. The same survey field was observed again by Hubble several years later, and was then reimaged in 2023. By comparing Hubble Wide Field Camera 3 near-infrared exposures taken in 2009, 2012, and 2023, astronomers found evidence for flickering supermassive black holes in the hearts of early galaxies. One example is seen as a bright object in the inset. Some supermassive black holes do not swallow surrounding material constantly, but in fits and bursts, making their brightness flicker. This can be detected by comparing Hubble Ultra Deep Field frames taken at different epochs. The survey found more black holes than predicted.
The image was created from Hubble data from the following proposals: 9978, 10086 (S. Beckwith); 11563 (G. Illingworth); 12498 (R. Ellis); and 17073 (M. Hayes). These images are composites of separate exposures acquired by the ACS and WFC3 instruments on the Hubble Space Telescope.
[Image description: This is a Hubble image of a black sky sprinkled with myriad galaxies of all shapes and sizes stretching back to nearly the beginning of the Universe. In the middle of the picture there is an inset box showing one sample pair of early galaxies. One galaxy is spiral-shaped and the other is spindle-shaped because it is a disc galaxy seen edge-on. The spindle-shaped galaxy has an active supermassive black hole that appears as a bright white spot. This is identified by comparing pictures of the same region taken at different epochs.]
Read more