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#arpgalaxy

9 posts6 participants1 post today
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Arp Bot 🤖

Hubble image of Arp 148, also known as Mayall's Object.

The nickname comes from astronomer Nicholas Mayall, who first imaged the object in 1940 and noted it looked like a question mark.

The galaxy to the left likely crashed through the galaxy on the right, creating a ring and triggering a burst of star formation.

Credit: NASA, ESA, STScI, A. Evans, K. Noll, and J. Westphal
Source: hubblesite.org/contents/media/

A pair of interacting galaxies. The galaxy on the left is likely an edge-on disk galaxy, appearing as a slightly warped, fuzzy, white horizontal line with dust filaments at its center. The galaxy on the right is a ring galaxy, appearing as a blue circular ring, dotted with blue star clusters, that also has its center partially filled in with blue star clusters. The two galaxies overlap so that the right end of the edge-on galaxy intersects with the ring galaxy's center. It looks a bit like a big blue hand holding the Enterprise in a classic episode of Star Trek.
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Arp Bot 🤖

Hubble image of Arp 299, also known as NGC 3690.

This image was taken in 2000 with Hubble's WFPC2 instrument to study the galaxies' hottest and brightest stars in ultraviolet light. Blue and green are ultraviolet, red is visible light. The observations show large amounts of interstellar dust in these merging galaxies.

Credit: NASA, R. Windhorst, and the Hubble mid-UV team
Source: hubblesite.org/contents/media/

Two merging galaxies form an orange and blue abstract butterfly shape. Within the shape are bright blue areas, which are clusters of young, hot stars. These are found in the center, the upper right "wing", and the bottom left "wing".
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Arp Bot 🤖

Hubble image of Arp 188, also known as the Tadpole Galaxy.

Seen shining through the Tadpole's disk, a tiny blue intruder galaxy likely caused the Tadpole's distorted shape. Gravitational interactions created the long tail of debris, stars and gas that stretch out more than 280,000 light-years.

Credit: NASA, ESA, H. Ford (JHU), G. Illingworth (UCSC/LO), M.Clampin and G. Hartig (STScI), ACS Science Team
Source: hubblesite.org/contents/media/

In the upper left corner is a spiral galaxy with a bright white central core encircled by two wispy arms that form a loose spiral around the core. The view is somewhat oblique, giving the galaxy an oval appearance. A long, thin, diffuse stream of stars and gas extends from the lower right side of the galaxy down to the lower right corner of the image. The spiral arms and the tail are dotted with blue stars. Scattered across the background there are hundreds tiny smudges of light that vary slightly in size, shape, and color. Most appear in the shape of small dots, ovals, or lines. They come in different shades of white, orange, red, and blue.
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Arp Bot 🤖

JWST image of Arp 16, also known as M66.

This image was taken as part of the PHANGS program. They take high-resolution observations of galaxies at many different wavelengths of light to learn how the small-scale details of how stars form influence the large-scale structures of galaxies.

Credit: NASA, ESA, CSA, STScI, J. Lee (STScI), T. Williams (Oxford), PHANGS Team
Source: webbtelescope.org/contents/med

A face-on barred spiral galaxy anchored by its central region, which has a bright blue central dot surrounded by a lighter diagonal blue bar structure made of a haze of stars, which forms an angled oval toward the top. The central core and bar fill about a third of the image. Two distinct spiny spiral arms made of stars, gas, and dust also start at the center, appearing brown or greenish within the blue bar, and extending to the edges, rotating clockwise in bright oranges. The brightest areas of the arms are two large arcs that start at the central region. The one at left stretches up to the top in a long arc and another at right extends toward the bottom. Scattered across the packed scene are bright blue pinpoints of light, which are stars spread throughout the galaxy. In areas where there is less orange, it is darker. A triangular area at bottom right is largely the black background of space.
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Arp Bot 🤖

Hubble image of Arp 194, also known as UGC 6945.

The upper component of this interacting galaxy group has two nuclei that appear to be connected and in the early stages of merging along with trails of blue super star clusters. The lower component of the group is a single large spiral galaxy with its own star clusters.

Credit: NASA, ESA, and the Hubble Heritage Team
Source: hubblesite.org/contents/media/

A group of three interacting spiral galaxies which resembles a question mark. At the top of the frame are two spiral galaxies in the process of merging. One of these galaxies has a bright yellow core connected to a short bar and two loose spiral arms. This forms a S-shape. Above this is another circular, yellow galaxy core which overlaps with the top spiral arm of the S-shaped galaxy. On the outer edges of the spiral arms are blue star clusters. Together these form the top curved half of the question mark. To the right of the S-shaped galaxy is a small, relatively normal-looking spiral galaxy, which is likely in the background. At the bottom of the frame is another large spiral galaxy. This galaxy has a bright core and somewhat ill-defined spiral arms which wind counterclockwise around the core. On the bottom half of the galaxy are blue star clusters. This forms the dot of the question mark. Connecting the merging galaxies at the top of the frame and the spiral at the bottom of the frame is a string of blue super star clusters, seen as large blue dots. This forms the straight part of the question mark. On the black background of space are several yellow and red dots, which are background galaxies.
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Arp Bot 🤖

Hubble image of Arp 300, also known as UGC 05028 and UGC 05029 .

UGC 05028 (the smaller spiral galaxy) and UGC 05029 (the larger spiral) form an interacting pair.

Interactions with its companion likely gave UGC 05028 its asymmetric structure. The bright knot in the bottom right of UGC 05028 may be yet another small galaxy that is in the process of merging.

Credit: NASA, ESA, J. Dalcanton, R. Windhorst, Gladys Kober
Source: science.nasa.gov/missions/hubb

The frame is dominated by a pair of spiral galaxies. The larger galaxy to the bottom right is seen nearly face-on. It has a small yellow core and many spiral arms that are dotted with blue star clusters, with more star clusters appearing on the top of the galaxy, the side that faces its companion. There are a few brown dust lanes, concentrated near the inner spiral arms. The smaller spiral galaxy to the upper right has a yellow bar structure that is surrounded by blue star clusters that only very roughly form spiral arms. On the right side of the galaxy is a yellow knot of stars that is brightest in its center, crossed by brown dust lanes. This may be a seperate dwarf galaxy that is either in front of the smaller spiral or is in the process of merging with it. Other distant galaxies and stars fill the black background of space.
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Arp Bot 🤖

Image of Arp 286, also known as NGC 5560, NGC 5566, and NGC 5569, from the Atlas of Peculiar Galaxies by Halton Arp (1966).

In the original catalog, it was in the category: Double and multiple galaxies - Infall and attraction. The three galaxies in this triplett are gravitationally interacting. NGC 5566 is at center, NGC 5569 at bottom left, and NGC 5560 at top left.

Source: ned.ipac.caltech.edu/level5/Ar

A grainy, black and white image of three spiral galaxies. The largest is at the center of the frame. The disk of the galaxy is tilted, so that it appears oval-shaped, with the long axis running diagonally from upper right to lower left. It has a bright center, surrounded by a ring structure. Emerging from the ring are two spiral arms, defined by faint dust lanes. The arms trace the outline of the oval. A faint haze of stars fills in the interior of the oval. At the bottom left is a much smaller face-on spiral galaxy. Unlike the other two galaxies in the group, this galaxy does not appear distorted. It has a small core, surrounded by a faint disk. At upper left is a distorted spiral galaxy seen nearly edge-on. Its disk is warped, forming a thin, nearly vertical, backward S-shape.
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Arp Bot 🤖

Image of Arp 142, also known as NGC 2936, NGC 2937, and UGC 5130, or the Penguin and the Egg, from the Atlas of Peculiar Galaxies by Halton Arp (1966).

In the original catalog, it was in the category: Elliptical galaxies - Emanating material. The Penguin is a spiral galaxy whose shape has been distorted by the gravity of the elliptical Egg galaxy. The two completed a close pass between 25 and 75 million years ago.

Source: ned.ipac.caltech.edu/level5/Ar

A grainy, black-and-white image of a pair of merging galaxies. A galaxy that looks somewhat like an egg is at left and a galaxy that looks somewhat like a penguin is at right. The Penguin is somewhat detailed, with a bright beak, body, and tail that is covered in an arc of dark dust that sweeps from the beak area and ends beyond its tail feathers. The Egg appears as a bright, featureless oval. A third disk-shaped galaxy is seen to the upper left. Various small galaxies and stars cover the scene, seen as fuzzy white points. The background of space is black.
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Arp Bot 🤖

Hubble image of Arp 107, also known as UGC 5984.

The one-armed spiral and its smaller elliptical companion galaxy are gravitationally interacting with one another, which is likely responsible for the spiral galaxy's unusual shape, as well as the bridge of gas and stars that connects the two galaxies.

Credit: ESA, NASA, J. Dalcanton, Dark Energy Survey, DOE, FNAL, NOIRLab, NSF, AURA, SDSS
Source: esahubble.org/images/potw2338a/

A pair of merging galaxies. The galaxy on the left has a single, large spiral arm curving out from the core and around to below it, with very visible glowing dust and gas. The right-hand galaxy has a bright core but only a bit of very faint material. A broad curtain of gas connects the two galaxies’ cores and hangs beneath them. A few small stars and galaxies are scattered around the black background.
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Arp Bot 🤖

Image of Arp 283, also known as NGC 2798 and NGC 2799, from the Atlas of Peculiar Galaxies by Halton Arp (1966).

In the original catalog, it was in the category: Double and multiple galaxies - Infall and attraction. The right galaxy in this interacting pair, NGC 2799, is viewed edge-on. A bridge with clumps of star formation appears to connect it to NGC 2798, at left.

Source: ned.ipac.caltech.edu/level5/Ar

A grainy, black and white image of a pair of interacting galaxies. The galaxy on the right is seen edge-on. It has a bright central core and a slightly warped disk that is dotted with star clusters and clumps of dark dust. The edge of the disk arcs to the right, appearing to connect to its companion galaxy. The second galaxy is inclined, but seen closer to face-on. Two spiral arms emerge from the core, which are wide and poorly defined.
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Arp Bot 🤖

Image of Arp 85, also known as the Whirlpool Galaxy or M51, from the Atlas of Peculiar Galaxies by Halton Arp (1966).

In the original catalog, it was in the category: Spiral galaxies - Large, high surface brightness companions. Halton Arp mistakenly believed that the smaller galaxy, NGC 5195, was being ejected from the Whirlpool. In reality, the two galaxies are in the process of merging.

Source: ned.ipac.caltech.edu/level5/Ar

A grainy, black and white image of two galaxies. The larger of the two galaxies, a spiral, is on the left side of the image. Two well-defined arms extend to from its center and form loose spirals around the middle. The smaller galaxy on the far-right side is fuzzy sphere. The view of this smaller galaxy is partially obstructed by the tip of one of the arms of the spiral galaxy, which appears to cover the top third of the smaller galaxy. Many white dots, stars, are seen on the black background.
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JWST and Hubble image of Arp 142, also known as NGC 2936 and NGC 2937, or the Penguin and the Egg.

In Hubble’s visible light view (left), a dark dust lane begins across the Penguin’s beak and extends through its body. In JWST’s near-infrared view (right), the dust is much fainter. A bridge of stars and gas connects the galaxies in the JWST image, and there is a gap with Hubble.

Credit: NASA, ESA, CSA, STScI
Source: webbtelescope.org/contents/med

Frame is split down the middle: Hubble’s visible light image at left, and Webb’s near-infrared image at right. Both show the Egg at left and the Penguin at right. In Hubble’s view, the Penguin is highly detailed, with a bright blue beak, body, and tail that is covered in an arc of bright brown dust. The Egg, to its left, appears bright, gleaming yellowish white. At top right is another galaxy seen from the side, about as long as the Egg’s height. Dozens of galaxies and stars appear in the background. Webb’s near-infrared image shows the Penguin’s beak, head, and back in shades of pink. It’s tail-like region is more diffuse, and a mix of lighter pinks and blues. The Egg appears slightly larger in blue layers. A semi-transparent blue forms an upside down U over top of both galaxies. At top right, an edge-on galaxy has many more pinpricks of light, which are stars. Thousands of galaxies and stars appear in the background. Some galaxies are shades of orange, while others are white.
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Arp Bot 🤖

ALMA and Hubble image of Arp 220, also known as IC 4553.

A merger of two spiral galaxies set of a burst of star formation, backlighting the dust lanes in the Hubble visible light view.

The red dots are millimeter wavelength light from ALMA, showing emission from molecules like water in two compact star clusters, the remnant cores of the spiral galaxies.

Credit: ALMA(ESO/NAOJ/NRAO), NASA, ESA, and The Hubble Heritage Team
Source: eso.org/public/images/eso1645a/

A section of the center of a pair of merging galaxies. The image is dominated by brown dust, which forms a blotchy diagonal band that runs from upper right to lower left. It is backlit by the bright light from the center of the galaxies. In the background are blue stars and star clusters, seen as a grainy blue background interspersed with blue dots. In the center are two bright red dots. The top one is brighter and the lower one is slightly fainter.
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Arp Bot 🤖

Image of Arp 285, also known as NGC 2854 and NGC 2856, from the Atlas of Peculiar Galaxies by Halton Arp (1966).

In the original catalog, it was in the category: Double and multiple galaxies - Infall and attraction. The lower galaxy, NGC 2856, has a clumpy tail perpendicular to its disk. It's an example of a “beads on a string” feature, where gravity creates knots of star formation at regular ~3,000 light year intervals.

Source: ned.ipac.caltech.edu/level5/Ar

A grainy, black and white image of a a pair of widely-space interacting spiral galaxies. The galaxy in the lower right has a bright disk seen at a slight angle so that it appears oval-shaped. It's spiral arms are fainter, but its lower arm is slightly brighter. A thin, clumpy line extends below the galaxy, perpendicular to its disk. The galaxy in the upper left has a strong bar and two spiral arms, forming a distinct S shape. The arms are dotted with star clusters. Faint streams of material extend out from the ends of the spiral arms. Several foreground stars are seen as bright dots. The brightest star, in the upper left, has four diffraction spikes.
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