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ESO 137-001 (Barred Spiral Galaxy)


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ESO 137-001
Barred Spiral Galaxy (棒渦巻銀河)
Gx SBc


別名 (Other names)

ESO 137-1, ESO-LV 137-0010, LEDA 57532, PGC 57532

星座 (Constellation)

みなみのさんかく座 (TrA) (Triangulum Australe)

距離 (Distance)

2億2,000万光年 (220 million light-years)

ESO 137-001 is a barred spiral galaxy located 220 million light years from the Earth in the constellation Triangulum Australe.

ESO 137-001 (Barred Spiral Galaxy) : Picture

ESO 137-001
ESO 137-001
(C) NASA/ESA
The spiral galaxy ESO 137-001 looks like a dandelion caught in a breeze in this new composite image from the Chandra X-ray Observatory and  the Hubble Space Telescope.

The galaxy is zooming toward the upper left of this image, in between other galaxies in the Norma cluster located over 200 million light-years away. The road is harsh: intergalactic gas in the Norma cluster is sparse, but so hot at 180 million degrees Fahrenheit that it glows in X-rays detected by Chandra (blue).

The spiral plows through the seething intra-cluster gas so rapidly - at nearly 4.5 million miles per hour - much of its own gas is caught and torn away. Astronomers call this "ram pressure stripping." The galaxy's stars remain intact due to the binding force of their gravity.

Tattered threads of gas, the blue jellyfish-tendrils sported by ESO 137-001 in the image, illustrate the process. Ram pressure has strung this gas away from its home in the spiral galaxy and out over intergalactic space. Once there, these strips of gas have erupted with young, massive stars, which are pumping out light in vivid blues and ultraviolet.

The brown, smoky region near the center of the spiral is being pushed in a similar manner, although in this case it is small dust particles, and not gas, that are being dragged backwards by the intra-cluster medium.

From a star-forming perspective, ESO 137-001 really is spreading its seeds into space like a dandelion in the wind. The stripped gas is now forming stars. However, the galaxy, drained of its own star-forming fuel, will have trouble making stars in the future. Through studying this runaway spiral, and other galaxies like it, astronomers hope to gain a better understanding of how galaxies form stars and evolve over time.

The image is also decorated with hundreds of stars from within the Milky Way. Though not connected in the slightest to ESO 137-001, these stars and the two reddish elliptical galaxies contribute to a vibrant celestial vista.

Spiral Galaxy ESO 137-001
Spiral Galaxy ESO 137-001
(C) NASA/ESA
This new Hubble image shows spiral galaxy ESO 137-001, framed against a bright background as it moves through the heart of galaxy cluster Abell 3627.

This image not only captures the galaxy and its backdrop in stunning detail, but also something more dramatic — intense blue streaks streaming outwards from the galaxy, seen shining brightly in ultraviolet light.

These streaks are in fact hot, wispy streams of gas that are being torn away from the galaxy by its surroundings as it moves through space. This violent galactic disrobing is due to a process known as ram pressure stripping — a drag force felt by an object moving through a fluid.

ESO 137-001
ESO 137-001
(C) NASA/CXC/UVa/M. Sun et al; H-alpha/Optical: SOAR/MSU/NOAO/UNC/CNPq-Brazil/M.Sun et al.

ESO 137-001 ESO 137-001
ESO 137-001
(C) NASA/ESA
ESO 137-001
(C) NASA/ESA
ESO 137-001
ESO 137-001
(C) NASA
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ESO 137-001 (Barred Spiral Galaxy) : Movie

Zooming in on ESO 137-001
This video zooms in on spiral galaxy ESO 137-001, which is undergoing ram pressure stripping. The sequence begins with a view of the night sky near the constellation of Triangulum Australe. It then zooms through observations from the Digitized Sky Survey 2, and ends with a view of the galaxy obtained by Hubble.

Hubblecast 72: Clues to a cosmic crime
The newest episode of the Hubblecast showcases striking new observations of a spiral galaxy moving through the heart of a galaxy cluster named Abell 3627. This cluster is violently ripping the spiral's entrails out into space, leaving bright blue streaks as telltale clues to this cosmic crime.
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