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IC 2574, also known as Coddington's Nebula, is a dwarf spiral galaxy[6] discovered by American astronomer Edwin Foster Coddington in 1898.[8][9] Located in Ursa Major, a constellation in the northern sky, it is an outlying member of the M81 Group. It is believed that 90% of its mass is in the form of dark matter.[10] IC 2574 does not show evidence of interaction with other galaxies. It is currently forming stars; a UV analysis showed clumps of star formation 85 to 500 light-years (26 to 150 pc) in size.[11]

IC 2574
Picture of IC 2574 produced with Hubble's Advanced Camera for Surveys
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension10h 28m 23.62046s[1]
Declination+68° 24′ 43.4414″[1]
Redshift0.000160±0.000020[2]
Distance (comoving)12.8 Mly (3.93 Mpc)[3]
Characteristics
TypeSABm[4]
Apparent size (V)12.02′ × 5.50′[5]
Other designations
Coddington's Nebula,[6] UGC 5666[7]

References


  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Paturel, G.; et al. (2002). Comparison LEDA/SIMBAD octobre 2002. Catalogue to be published in 2003. LEDA. Bibcode:2002LEDA.........0P.
  3. Karachentsev, Igor D.; et al. (January 2017). "The Local Tully-Fisher Relation for Dwarf Galaxies". The Astronomical Journal. 153 (1): 17. arXiv:1611.02574. Bibcode:2017AJ....153....6K. doi:10.3847/1538-3881/153/1/6. S2CID 119388974. 6.
  4. Khramtsova, M. S.; et al. (May 2013). "Polycyclic aromatic hydrocarbons in spatially resolved extragalactic star-forming complexes". Monthly Notices of the Royal Astronomical Society. 431 (2): 2006–2016. arXiv:1302.4837. Bibcode:2013MNRAS.431.2006K. doi:10.1093/mnras/stt319.
  5. Paturel, G.; et al. (December 2003), "HYPERLEDA. I. Identification and designation of galaxies", Astronomy and Astrophysics, 412: 45–55, Bibcode:2003A&A...412...45P, doi:10.1051/0004-6361:20031411.
  6. "APOD: 2012 June 22 – IC 2574: Coddington's Nebula". apod.nasa.gov. Retrieved 2020-01-16.
  7. "IC 2574". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-16.
  8. "Some of The Named Galaxies". iitk.ac.in/. Indian Institute of Technology Kanpur. Archived from the original on 2012-01-04. Retrieved 2018-11-06.
  9. Walter, Fabian; Brinks, Elias (1999). "Holes and Shells in the Interstellar Medium of the Nearby Dwarf Galaxy IC 2574". The Astronomical Journal. Institute of Physics. 118 (1): 273–301. arXiv:astro-ph/9904002. Bibcode:1999AJ....118..273W. doi:10.1086/300906. S2CID 14572518.
  10. Darling, David. "Coddington's Nebula (IC 2574)". Worlds of David Darling. Retrieved 2019-01-16.
  11. Mondal, Chayan; Subramaniam, Annapurni; George, Koshy (2021). "A tale of two nearby dwarf irregular galaxies WLM and IC 2574: As revealed by UVIT". Journal of Astrophysics and Astronomy. 42 (2): 50. arXiv:2105.13048. Bibcode:2021JApA...42...50M. doi:10.1007/s12036-021-09761-z. S2CID 235212077.


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На других языках

[de] IC 2574

IC 2574 ist eine Balkenspiralgalaxie vom Hubble-Typ SAB(s)m im Sternbild Großer Bär. Sie ist schätzungsweise 7 Millionen Lichtjahre von der Milchstraße entfernt, hat einen Durchmesser von etwa 45.000 Lj und gehört zur M81-Galaxiengruppe.
- [en] IC 2574

[ru] Туманность Коддингтона

Туманность Коддингтона (англ. Coddington's Nebula, также IC 2574 , PGC 30819, UGC 5666) — спиральная галактика в созвездии Большой Медведицы. Была открыта в 17 апреля 1898 года Эдвином Коддингтоном в Ликской обсерватории[7].


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