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Hubble Space Telescope Spots Long-Armed Spiral Galaxy

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Astronomers using the NASA/ESA Hubble Space Telescope have captured a stunning image of the spiral galaxy ESO 415-19.

This Hubble image shows ESO 415-19, a spiral galaxy located some 450 million light-years away in the southern constellation of Fornax. In the top-right there is a smaller, orange elliptical galaxy. The color image was made from separate exposures taken in the visible and infrared regions of the spectrum with Hubble’s Advanced Camera for Surveys (ACS) and the Dark Energy Camera (DECam) on the Víctor M. Blanco 4-m telescope at Cerro Tololo Inter-American Observatory. Four filters were used to sample various wavelengths. The color results from assigning different hues to each monochromatic image associated with an individual filter. Image credit: NASA / ESA / Hubble / J. Dalcanton, Dark Energy Survey / DOE / FNAL / DECam / CTIO / NOIRLab / NSF / AURA.

ESO 415-19 is a peculiar spiral galaxy approximately 450 million light-years from Earth.

Also known as LEDA 8936 or IRAS F02188-3210, it is found in the southern constellation of Fornax.

ESO 415-19 has a bright core with patches of dark dust, and fuzzier, dimmer spiral arms in cooler colors, with spots of bright blue.

Long, faint tidal streams stretch from the galaxy’s arms: one up to the top of the frame, one curving down to the bottom-left corner.

“While the center of this object resembles a regular spiral galaxy, long streams of stars stretch out from the galactic core like bizarrely elongated spiral arms,” Hubble astronomers said in a statement.

“These are tidal streams caused by some chance interaction in the galaxy’s past, and give ESO 415-19 a distinctly peculiar appearance.”

“ESO 415-19’s peculiarity made it a great target for Hubble,” they added.

“This observation comes from an ongoing campaign to explore the Arp Atlas of Peculiar Galaxies, a menagerie of some of the weirdest and most wonderful galaxies that the Universe has to offer.”

“These galaxies range from bizarre lonesome galaxies to spectacularly interacting galaxy pairs, triplets, and even quintets.”

“These space oddities are spread throughout the night sky, which means that Hubble can spare a moment to observe them as it moves between other observational targets.”

“This particular observation lies in a part of the night sky contained by the Fornax constellation,” the astronomers said.

“This constellation was also the site of a particularly important Hubble observation: the Hubble Ultra Deep Field.”

“Creating the Ultra Deep Field required almost a million seconds of Hubble time, and captured nearly 10,000 galaxies of various ages, sizes, shapes, and colors.”

“Just as climate scientists can recreate the planet’s atmospheric history from ice cores, astronomers can use deep field observations to explore slices of the Universe’s history from the present all the way to when the Universe was only 800 million years old.”

Source : Breaking Science News

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