ACS image of ESO 306-17

This image from the Advanced Camera for Surveys aboard the NASA/ESA Hubble Space Telescope highlights the large and bright elliptical galaxy called ESO 306-17 in the southern sky.

In this image, it appears that ESO 306-17 is surrounded by other galaxies but the bright galaxies at bottom left are thought to be in the foreground, not at the same distance in the sky. In reality, ESO 306-17 lies fairly abandoned in an enormous sea of dark matter and hot gas.

Researchers are also using this image to search for nearby ultra-compact dwarf galaxies. Ultra-compact dwarfs are mini versions of dwarf galaxies that have been left with only their core due to interaction with larger, more powerful galaxies. Most ultra-compact dwarfs discovered to date are located near giant elliptical galaxies in large clusters of galaxies, so it will be interesting to see if researchers find similar objects in fossil groups.

Credit:

NASA, ESA and Michael West (ESO)

About the Image

Id:heic1004a
Type:Observation
Release date:4 March 2010, 16:00
Related releases:heic1004
Size:3855 x 3831 px

About the Object

Name:ESO 306-17
Type:• Local Universe : Galaxy : Type : Elliptical
• X - Galaxies Images/Videos
Distance:500 million light years

Colours & filters

BandWavelengthTelescope
Optical
B
475 nm Hubble Space Telescope
ACS
Optical
Pseudogreen (B+I)
Hubble Space Telescope
ACS
Infrared
I
850 nm Hubble Space Telescope
ACS

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