The NASA/ESA Hubble Space Telescope has captured a fantastic photo of a massive galaxy cluster named SDSS J0150+2725.
In the upper part of this Hubble image, the light from distant galaxies has been smeared and twisted into odd shapes, arcs, and streaks. This phenomenon indicates the presence of a massive galaxy cluster, SDSS J0150+2725, which is bending the light coming from the galaxies behind it with its monstrous gravitational influence. Image credit: NASA / ESA / Hubble / Judy Schmidt, www.geckzilla.com.
SDSS J0150+2725 is a massive cluster of galaxies approximately 3 billion light-years away.
It was first documented by the Sloan Digital Sky Survey (SDSS), hence its name.
SDSS uses a 2.5-m optical telescope located at Apache Point Observatory in New Mexico, the United States, to observe millions of objects and create detailed 3D maps of the Universe.
This particular cluster was part of the Sloan Giant Arcs Survey (SGAS), which detected galaxy clusters with strong lensing properties.
Their gravity stretches and warps the light of more distant galaxies sitting behind them, creating weird and spectacular arcs such as those seen here.
Hubble data on SDSS J0150+2725 were part of a study of star formation in so-called brightest cluster galaxies — the most luminous galaxies in galaxy clusters, generally lying very close to the spatial and kinematical center of a cluster.
The study found the star formation rate in these galaxies to be low, which is consistent with models that suggest that most stars in such galaxies form very early on.
Brightest cluster galaxies also emit strong radio signals thought to be from active galactic nuclei (AGN) at their centers, suggesting that the activity from both the AGN and any ongoing star formation is fuelled by cold gas found within the host galaxies.
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