Polar-ring galaxy

A polar-ring galaxy is a relatively rare type of galaxy, with only around 100 examples known.

File:Image-PGR.jpg

Examples of Polar-ring Galaxy

The best know example is NGC 4650A. It is theorized that the structure of these galaxies result from the collision of two galaxies. The collision results in a structure composed of two rings of material rotating at an approximate right angle to each other.

File:Form-PRG.jpg

Formation of polar-ring Galaxies

File:TPRG1137.jpg

Types of Polar-ring galaxies

See also

• List of Polar-ring galaxies

References

Hubblesite.org Retrieved 3/06, 1/07

External links

• An image of NGC 4650A, a Polar Ring Galaxy

Category	Names of objects
Kinematically Confirmed Polar-ring galaxies	A 0136-0801, ESO 415-G26, Helix Galaxy, UGC 7576, NGC 4650A, UGC 9796
Candidates for Polar-ring galaxies	IC 51, A 0113-5442, IC 1689, A 0336-4905, A 0351-5458, AM 0442-622, Abell 548-71,AM 063-371, UGC 5119, A 0950-2234, UGC 5600, ESO 503-G17, Abell 1631-14, Abell 1644-105, A 1256-1710, NGC 5122, UGC 9562, AM 1934-563, AM 2020-504, A 2135-2132, ESO 603-G21, A 2329-4102, A 2330-3751, A 2333-1637, A 2349-3927, A 2350-4042, ESO 293-IG17
Possible Candidates for Polar-ring galaxies	ESO 349-G36, A 00+2212, ESO 474-G26, A 0051-1323, AM 0051-234, NGC 304, ESO 113-IG4,ESO 243-IG19, NGC 442, ESO 152-IG3, NGC 625, UGC 1198, NGC 660, NGC 979, ESO 199-IG12, AM 0323-0430, A 0358-G20, ESO 358-G20, A 0323-0430, ESO 358-G20, A 0358-1707, ESO 201-IG26, A 0414-4756, ESO 202-G1, Abell 548-71, UGC 4261, UGC 4323, UGC 4332, NGC 2748, NGC 2865, UGC 5101, EGC 566-IG8, IC 575, ESO 500-G41, NGC 3384, NGC 3414, 3CR 249.1, UGC 6182, NGC 3934, NGC 4174, UGC 7388, IC 3370, NGC 4674, A 1247-2540, NGC 5103, NGC 5128, ESO 576-G69, A 1334-2935, ESO 326-IG6, A 1334-2935, ESO 326-IG6, NGC 6028, UGC 10205, NGC 6285+6286, ESO 232-G4, A 2015-7111, A 2027-2335, ESO 143-G37, A 2040-6210, A 2103-2532, NGC 7016, A 2104-2536, ESO 464-G31, A 2116-233, ESO 236-IG2, A 2132-2742, ESO 343-IG13, ESO 287-IG50, A 2150-1707, ESO 75-G55, A 2220-6617, NGC 7468, A 2304-3308, ZGC 2315+03, ESO 240-IG16, A 2358-2604
Objects related to polar-ring galaxies	ESO 79-G5, NGC 235, ESO 474-G11, ESO 296-G11, A 0153-3034, AM 0310-252, ESO 202-IG5,ESO 305-G21, AM 0529-442, A 0618-3633, ESO 16-G16, UGC 4892, NGC 3034, UGC 5485, NGC 3310, NGC 3406, A 1123-232, NGC 3718, NGC 3808, ESO 171_IG5, UGC 7636, NGC 4643, NGC 4753, AM 1257-222, UGC 8387, A 1356-2618, PG 163+658, NGC 6240, A 1837-6317, ESO 341-IG4, ESO 286-IG19, A 2102-2345, A 2111-5509, AM 2115-574, NGC 7252, A 2225-5838, ESO 146-IG29, A 2226-2459, ESO 109-IG23, ESO 239-IG2, A 2246-4909, NGC 7465,
Typical examples of polar-ring galaxies (Boz, Peanut and X galaxies)	ESO 510-G13, NGC 520
Typical examples of polar-ring galaxies (Dust-lane eclipticals)	NGC 7625
Typical examples of polar-ring galaxies (Mayall-type objects)	NGC 5544+ NGC 5545
Typical examples of polar-ring galaxies (Smoke ring galaxies)	ESO 350-G40
Typical examples of polar-ring galaxies (Superpositions that resemble polar-ring galaxies)	NGC 3314 A 2256-0814
Typical examples of polar-ring galaxies (Theta Galaxies)	A 0103-3044
Typical examples of polar-ring galaxies (Hong-type objects)	A 1515+2146
Kinematically Related	Milky way + Magellanic Stream, NGC 1068, NGC 1316, UGC 2892, NGC 3528, A 0609-331, NGC 2217, A 0632-629, A 0641-412, UGC 4519, A 1029-459, NGC 3998, NGC 4203, NGC 4262, NGC 4370, NGC 4546, NGC 5077, NGC 5194, NGC 5266, NGC 5745, NGC 5898, NGC 7007, NGC 7097

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