Galaxy - Polar Ring

Galaxy - Polar Ring A collection by Gary Imm

The formation and structure of polar ring galaxies (PRGs) are fascinating to me. PRGs are multi-spin galaxies with 2 axes of rotation. The multi-spin is believed to be the result of a galaxy merger, which the host galaxy accretes stars, dust and gas from a nearby companion galaxy. Sometimes these companions are still present, but typically (as in this case) not. The accreted material forms a large perpendicular ring around the host galaxy. Often the host galaxy appears yellow (older stars) and the accreted ring appears blue (recently formed stars). Unlike other merger results, polar ring galaxies are believed to be a relatively stable configuration, in a quasi-equilibrium state.

NGC 3718, NGC 3729, and Hickson 56
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193 8
43 0
NGC 6349 and NGC 6351
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112 1
17 1
Arp 336
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137 23
56 1
NGC 5122
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99 3
22 1
Polar Ring Galaxies
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131 16
31 0
ESO 603-20 and ESO 603-21
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101 6
33 1
LEDA 6101
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107 3
40 1
Arp 230
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105 2
31 1
Arp 302
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121 7
35 1
Arp 132
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82 0
14 1
Arp 292
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94 1
25 1
Arp 229
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87 3
23 1
NGC 660
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135 8
67 0
Arp 204
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79 3
24 1
UGC 9796
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79 7
40 0
Arp 293
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91 3
27 1
UGC 9562 & UGC 9560
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62 1
23 0
Arp 87
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65 2
7 1
Hickson 61 & Abell 1495 - 2019
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109 10
13 0

	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

	...
	193		8
	43		0

	...
	112		1
	17		1

	...
	137		23
	56		1

	...
	99		3
	22		1

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Gary Imm

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