HCG 87: Difference between revisions
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'''HCG 87''' is a compact [[group of galaxies]] listed in the [[Hickson Compact Group]] Catalogue. This group is about [[1 E24 m|400 million]] [[light-year]]s away <ref>{{cite web |url=http://heritage.stsci.edu/1999/31/hicktable.ps |title=This redshift corresponds to a distance of 120Mpc or 400 million light years (using H<sub>0</sub> = 75km/s/Mpc and q<sub>0</sub> = 0.1). At the distance of the group, this corresponds to a group diameter of 52kpc, i.e., the group is approximately 170,000 light years across |url-status=dead |archive-date=19 February 2020 |archive-url=https://web.archive.org/web/20200219030953/http://heritage.stsci.edu/1999/31/hicktable.ps |quote=PS File download need Photoshop or GIMP }}</ref> in the [[constellation]] [[Capricornus]]. | '''HCG 87''' is a compact [[group of galaxies]] listed in the [[Hickson Compact Group]] Catalogue. This group is about [[1 E24 m|400 million]] [[light-year]]s away <ref>{{cite web |url=http://heritage.stsci.edu/1999/31/hicktable.ps |title=This redshift corresponds to a distance of 120Mpc or 400 million light years (using H<sub>0</sub> = 75km/s/Mpc and q<sub>0</sub> = 0.1). At the distance of the group, this corresponds to a group diameter of 52kpc, i.e., the group is approximately 170,000 light years across |url-status=dead |archive-date=19 February 2020 |archive-url=https://web.archive.org/web/20200219030953/http://heritage.stsci.edu/1999/31/hicktable.ps |quote=PS File download need Photoshop or GIMP }}</ref> in the [[constellation]] [[Capricornus]]. | ||
The group distinguishes itself as one of the most compact groups of galaxies, hosting two [[Active galactic nucleus|active galactic nuclei]] and a starburst among its three members, all of which show signs of interaction.<ref>Noll, Keith. 07/1999. "Hubble Heritage observations of Hickson Compact Galaxy Group 87".</ref> This interaction, which astronomers have called visually, and scientifically, intriguing<ref>English, J. et al. 05/2000. "A Minuet of Galaxies: Hickson Compact Group 87 as Viewed by the Hubble Space Telescope". American Astronomical Society, 195th AAS Meeting, #136.04; Bulletin of the American Astronomical Society, Vol. 32, p.884.</ref> is being examined to understand the influence of active nuclei on star formation histories. | The group distinguishes itself as one of the most compact groups of galaxies, hosting two [[Active galactic nucleus|active galactic nuclei]] and a starburst among its three members, all of which show signs of interaction.<ref>Noll, Keith. 07/1999. "Hubble Heritage observations of Hickson Compact Galaxy Group 87".</ref> This interaction, which astronomers have called visually, and scientifically, intriguing<ref>[[Jayanne English|English, J.]] et al. 05/2000. "A Minuet of Galaxies: Hickson Compact Group 87 as Viewed by the Hubble Space Telescope". American Astronomical Society, 195th AAS Meeting, #136.04; Bulletin of the American Astronomical Society, Vol. 32, p.884.</ref> is being examined to understand the influence of active nuclei on star formation histories. | ||
==Members== | ==Members== | ||
Latest revision as of 19:06, 29 July 2025
Template:Short description Template:Galaxy cluster
HCG 87 is a compact group of galaxies listed in the Hickson Compact Group Catalogue. This group is about 400 million light-years away [1] in the constellation Capricornus. The group distinguishes itself as one of the most compact groups of galaxies, hosting two active galactic nuclei and a starburst among its three members, all of which show signs of interaction.[2] This interaction, which astronomers have called visually, and scientifically, intriguing[3] is being examined to understand the influence of active nuclei on star formation histories.
Members
| Name | Type[4] | R.A. (J2000)[4] | Dec. (J2000)[4] | Redshift (km/s)[4] | Apparent Magnitude[4] |
|---|---|---|---|---|---|
| HCG 87a | S0 pec | Template:RA | Template:DEC | 8443 ± 14 | 15.3 |
| HCG 87b | SA(r)0 pec | Template:RA | Template:DEC | 8740 ± 20 | 15.4 |
| HCG 87c | Sb | Template:RA | Template:DEC | 8914 ± 7 | 16.1 |
| HCG 87d | Sd | Template:RA | Template:DEC | 10200 ± 160 | 17.8 |
External links
- Astronomy Picture of the Day
- Galaxy Group HCG 87 – 2003 July 31
- HCG 87: A Small Group of Galaxies – 2010 July 6
- Close-ups of HCG 87
- Galactic Clusters
- Studies of Hickson Compact Groups
References
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- ↑ Script error: No such module "citation/CS1".
- ↑ Noll, Keith. 07/1999. "Hubble Heritage observations of Hickson Compact Galaxy Group 87".
- ↑ English, J. et al. 05/2000. "A Minuet of Galaxies: Hickson Compact Group 87 as Viewed by the Hubble Space Telescope". American Astronomical Society, 195th AAS Meeting, #136.04; Bulletin of the American Astronomical Society, Vol. 32, p.884.
- ↑ a b c d e Script error: No such module "citation/CS1".
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Template:Sky Template:Capricornus Script error: No such module "Navbox".