Hickson Compact Group

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Hickson Compact Group
Alternative names Hickson Galaxy Groups 、HCG
Survey type astronomical catalog Edit this on Wikidata
Target galaxy Edit this on Wikidata
Named after Paul Hickson Edit this on Wikidata
Commons page Related media on Wikimedia Commons
Hickson Compact Group 7 image taken by the Hubble Space Telescope. This grouping is composed of one lenticular (lens-shaped) and three spiral galaxies in close proximity.[1]

A Hickson Compact Group (abbreviation: HCG) is a collection of galaxies designated as published by Paul Hickson in 1982.[2]

The most famous group on Hickson’s list of 100 objects is HCG 92, Stephan's Quintet.

Hickson Compact Groups[edit]

According to Hickson: “Most compact groups contain a high fraction of galaxies having morphological or kinematical peculiarities, nuclear radio and infrared emission, and starburst or active galactic nuclei (AGN) activity. They contain large quantities of diffuse gas and are dynamically dominated by dark matter. They most likely form as subsystems within looser associations and evolve by gravitational processes. Strong galaxy interactions result and merging is expected to lead to the ultimate demise of the group. Compact groups are surprisingly numerous, and may play a significant role in galaxy evolution.”[3]

List[edit]

Image HCG Right ascension[4] Declination[4] Galaxy count[5] Members Notes
1 00h 26.0m +25° 43′ 4 UGC 248, PGC 1625, PGC 1614, PGC 1618
2 00h 31m 24s +08° 26.8′ 4 UGC 312, Markarian 552, UGC 314, UGC 315
3 00h 34m 11s −07° 35.6′ 4
4 00h 34m 15.3s −21° 26′ 52″ 5
5 00h 38m 54s +07° 03.8′ 4
6 00h 39m 10s −08° 23.7′ 4
HCG 7.jpg 7 00h 39m 15.9s +00° 53′ 17″ 4 NGC 192, NGC 196, NGC 197, NGC 201 Contains three spirals and one lenticular galaxy[6]
8 00h 49m 37s +23° 34.8′ 4
9 00h 54m 18s −23° 33.1′ 4
N536s.jpg 10 01h 26m 24.5s +34° 42′ 51″ 4 NGC 536, NGC 529, NGC 531, NGC 542
11 01h 26.6m −23° 13′ 4
12 01h 27m 33.7s −04° 40′ 14″ 5
13 01h 32.4m −07° 52′ 5
14 01h 59m 47s −07° 01.7′ 4
15 02h 07m 39.0s +02° 08′ 18″ 6
NGC 833 - NGC 835 R814G606B435.png 16 02h 09m 31.3s −10° 09′ 31″ 4 Contains three starburst galaxies, two LINER galaxies, and a Seyfert 2 galaxy[7]
17 02h 14m 04.5s +13° 18′ 54″ 5
18 02h 39m 06.10s +18° 23′ 02.0″ 4
19 02h 42m 45s −12° 24.7′ 4
20 02h 44m 14s +26° 06.2′ 6
21 02h 45m 16.9s −17° 37′ 35″ 5
A members-only galaxy club.jpg 22 03h 03m 31s −15° 40.5′ 5
23 03h 07m 06s −09° 35.1′ 5
24 03h 20.3m −10° 51′ 4
25 03h 20m 43.7s −01° 03′ 07″ 7
26 03h 21m 54s −13° 38.8′ 4
27 04h 19.4m −11° 42′ 5
28 04h 27m 19s −10° 19.0′ 4
29 04h 34m 45s −30° 32.8′ 4
30 04h 36.5m −02° 49′ 4
Hickson Compact Group 31.jpg 31 05h 01m 37s −04° 15.4′ 4 NGC 1741A, PGC 16570, NGC 1741B, PGC 16571
32 05h 01.7m −15° 25′ 4
33 05h 10m 47.6s +18° 01′ 11″ 4
34 05h 21m 47s +06° 40.6′ 4
35 08h 45m 20.71s +44° 32′ 23.1″ 6
36 09h 09m 24s +15° 47.7′ 4
37 09h 13m 35.6s +30° 00′ 51″ 5
38 09h 27.6m +12° 16′ 4
39 09h 29m 28s −01° 20.7′ 4
40 09h 38m 54s −04° 51.1′ 6
41 09h 57m 40s +45° 14.4′ 4
42 10h 00m 13.1s −19° 38′ 24″ 4
43 10h 11.2m −00° 01′ 5
N3190s.jpg 44 10h 18m 00s +21° 48.7′ 4
45 10h 19.2m +59° 06′ 4
46 10h 22.0m +17° 48′ 4
47 10h 25m 48s +13° 43.9′ 4
48 10h 37m 45.6s −27° 04′ 50″ 4
49 10h 56m 36s +67° 10.8′ 4
50 11h 17m 06s +54° 55.1′ 5
51 11h 22m 21.6s +24° 19′ 41″ 6
52 11h 26.3m +21° 05′ 4
53 11h 28m 58s +20° 46.6′ 4
54 11h 29m 15s +20° 34.7′ 4
55 11h 32m 07s +70° 48.7′ 5
56 11h 32m 32s +52° 56.9′ 5
N3750s-crop.jpg 57 11h 37m 50.5s +21° 59′ 06″ 8 Also known as Copeland's Septet
58 11h 42m 09.4s +10° 16′ 30″ 5
Hickson Compact Group 59.jpg 59 11h 48m 27s +12° 43.0′ 5 IC 737, IC 736, PGC 36871, PGC 36867, PGC 36851
60 12h 03m 05s +51° 41.6′ 4
Boxs-crop.jpg 61 12h 12m 24s +29° 10.7′ 4
62 12h 53m 05.6s −09° 12′ 21″ 4
63 13h 02.2m −32° 46′ 4
64 13h 25m 43s −03° 51.5′ 4
65 13h 29m 53s −29° 30.0′ 5
66 13h 38m 33s +57° 18.3′ 4
67 13h 49m 03.5s −07° 12′ 20″ 4
68 13h 53m 40.9s +40° 19′ 07″ 5
69 13h 55m 31s +25° 03.8′ 4
70 14h 04m 07.4s +33° 19′ 10″ 6
71 14h 11.1m +25° 29′ 4
72 14h 47m 55s +19° 03.6′ 5
73 15h 02m 40.1s +23° 21′ 13″ 5
74 15h 19m 28s +20° 53.6′ 5
75 15h 21m 37.0s +21° 10′ 50″ 6
76 15h 31.7m +07° 18′ 5
77 15h 49m 17s +21° 49.7′ 4
78 15h 48.5m +68° 12′ 4
Seyfert Sextet cut out.jpg 79 15h 59m 13s +20° 45.1′ 5 NGC 6027, NGC 6027a, NGC 6027b, NGC 6027c, NGC 6027d, NGC 6027e (tidal tail of NGC 6027) Also known as UGC 10116, VV 115, Seyfert's Sextet or Serpens Sextet. Contains 2 lenticular galaxies, 3 spiral galaxies (one barred spiral) and a tidal tail.
80 15h 59m 12s +65° 13.6′ 4
81 16h 18m 13s +12° 47.6′ 4
82 16h 28m 22.1s +32° 49′ 25″ 4
83 16h 35m 40.9s +06° 16′ 12″ 4
84 16h 44m 08s +77° 50.2′ 6
85 18h 50m 22.3s +73° 21′ 00″ 4
86 19h 51m 59.2s −30° 49′ 34″ 4
HCG87 HST 2001-22-d-web print.jpg 87 20h 48m 11s −19° 50.4′ 4 ESO 597-36, PGC 65409, ESO 597-35, PGC 65414 One of the most compact groups, hosting two active galactic nuclei and a starburst among its three members, all of which show signs of interaction
88 20h 52.4m −05° 45′ 4
89 21h 20.2m −03° 54′ 4
HCG 90HST.jpg 90 22h 02m 06.3s −31° 55′ 48″ 4
91 22h 09m 00.8s −27° 47′ 36″ 4
Stephan's Quintet Hubble 2009.full denoise.jpg 92 22h 35m 57.5s +33° 57′ 36″ 5 NGC 7317, NGC 7318A, NGC 7318B, NGC 7319, NGC 7320C Also called Stephan's Quintet, one galaxy of the sixsome, NGC 7320, is not part of the HCG but is a foreground galaxy in front of the five galaxies in the HCG. When discovered, two of the galaxies in the grouping were considered to be one galaxy, NGC 7318.
93 23h 15m 12.2s +18° 59′ 31″ 5
94 23h 17m 16.5s +18° 43′ 11″ 7
95 23h 19m 32s +09° 29.5′ 4
Hubble Interacting Galaxy NGC 7674 (2008-04-24).jpg 96 23h 27m 58s +08° 46.4′ 4
97 23h 47m 24.0s −02° 19′ 08″ 5
98 23h 54.2m +00° 22′ 4
99 00h 00m 43s +28° 23.7′ 4
100 00h 01.3m +13° 07′ 4

Gallery[edit]

Further reading[edit]

See also[edit]

References[edit]

  1. ^ "Crowded, but Suspiciously Quiet?". Picture of the Week. ESA/Hubble. Retrieved 10 August 2011. 
  2. ^ Hickson, Paul (1982). "Systematic properties of compact groups of galaxies". Astrophysical Journal. 255: 382–391. Bibcode:1982ApJ...255..382H. doi:10.1086/159838. 
  3. ^ "Compact Groups of Galaxies". Retrieved 2006-10-23. 
  4. ^ a b "HCG". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 8 March 2017. 
  5. ^ Hickson, P. (1982). "Systematic properties of compact groups of galaxies". Astrophysical Journal. 255: Part 1, 382–391. Bibcode:1982ApJ...255..382H. doi:10.1086/159838. 
  6. ^ "Anne’s Picture of the Day: Hickson Compact Group 7". Anne's Astronomy News. 27 December 2012. 
  7. ^ "Hubble views a bizarre cosmic quartet". Space Daily. 22 June 2015. 
  8. ^ "A fossil in the making". ESA/Hubble Picture of the Week. Retrieved 3 July 2014. 
  9. ^ "A members-only galaxy club". ESA/Hubble Picture of the Week. Retrieved 10 December 2013. 

External links[edit]