NGC 772
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| NGC 772 | |
|---|---|
| Lua error in package.lua at line 80: module 'Module:InfoboxImage/data' not found. NGC 772 imaged by the Gemini Observatory[1] | |
| Observation data (J2000 epoch) | |
| Constellation | Aries |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Redshift | 0.008236[2] |
| Heliocentric radial velocity | 2469 ± 2 km/s[2]Template:R/superscript |
| Distance | 105.7 ± 7.5 Mly (32.42 ± 2.29 Mpc)[2] |
| Apparent magnitude (V) | 11.1[2] |
| Characteristics | |
| Type | SA(s)b[2] |
| Size | ~204,000 ly (62.56 kpc) (estimated)[2]Template:R/superscript |
| Apparent size (V) | 7.2′ × 4.3′[2] |
| Other designations | |
| Template:Odlist[2] | |
NGC 772 (also known as Arp 78 or the Fiddlehead Galaxy[3]) is a large unbarred spiral galaxy approximately 106 million light-years away in the constellation Aries. It was discovered by German-British astronomer William Herschel on 29 November 1785.[4][5]
Characteristics
At around 200,000 light years in diameter, NGC 772 is somewhat larger than the Milky Way Galaxy,[6] and is surrounded by several satellite galaxies – including the dwarf elliptical, NGC 770 – whose tidal forces on the larger galaxy have likely caused the emergence of a single elongated outer spiral arm that is much more developed and stronger than the other arms. Halton Arp includes NGC 772 in his Atlas of Peculiar Galaxies as Arp 78, where it is described as a "Spiral galaxy with a small high-surface brightness companion".
NGC 772 probably has a H II nucleus, but it may be a transitional object.[7]
Supernovae
Three supernovae have been observed in NGC 772:
- SN 2003hl (Type II, mag. 16.5) was discovered by LOTOSS (Lick Observatory and Tenagra Observatory Supernova Searches) on 20 August 2003.[8][9]
- SN 2003iq (Type II, mag. 16.4) was discovered by Jean-Marie Llapasset on 8 October 2003.[10][11][12] This supernova was visible at the same time as SN 2003hl, which had been discovered 7 weeks prior.[13]
- SN 2022qze (Type II-P, mag. 19.89) was discovered by Pan-STARRS on 8 August 2022.[14]
Gallery
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RGB image of the galaxy NGC 772 and dwarf galaxy NGC 770 (top center) interacting, from the Liverpool Telescope
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Center of the galaxy imaged by the Hubble Space Telescope.[15]
See also
References
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- ^ Page Module:Citation/CS1/styles.css has no content."Strong-Arming a Galaxy". NOIRLab. Retrieved 30 January 2023.
- ^ a b c d e f g h i j Page Module:Citation/CS1/styles.css has no content."Results for object NGC 0772". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 2006-11-25.
- ^ Page Module:Citation/CS1/styles.css has no content.Stoyan, Ronald; Schurig, Stephan (2014). interstellarum Deep Sky Atlas. Erlangen: Cambridge University Press; Oculum-Verlag GmbH. ISBN 978-1-107-50338-0. OCLC 920437579.
- ^ Page Module:Citation/CS1/styles.css has no content.Herschel, W. (1789). "Catalogue of a Second Thousand of New Nebulae and Clusters of Stars; with a Few Introductory Remarks on the Construction of the Heavens". Philosophical Transactions of the Royal Society of London. 79: 212–255. Bibcode:1789RSPT...79..212H. doi:10.1098/rstl.1789.0021.
- ^ Page Module:Citation/CS1/styles.css has no content.Seligman, Courtney. "NGC 772". Celestial Atlas. Retrieved 17 August 2024.
- ^ Page Module:Citation/CS1/styles.css has no content.Rhee, M. H.; van Albada, T. S. (February 1996). "Short WSRT HI observations of spiral galaxies". Astronomy and Astrophysics Supplement. 115: 407–437. Bibcode:1996A&AS..115..407R.
- ^ Page Module:Citation/CS1/styles.css has no content.Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (October 1997). "A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies". Astrophysical Journal Supplement. 112 (2): 315–390. arXiv:astro-ph/9704107. Bibcode:1997ApJS..112..315H. doi:10.1086/313041. S2CID 17086638.
- ^ Page Module:Citation/CS1/styles.css has no content.Moore, M.; Li, W.; Boles, T. (2003). "Supernovae 2003hg, 2003hh, 2003hi, 2003hj, 2003hk, 2003hl". International Astronomical Union Circular (8184): 2. Bibcode:2003IAUC.8184....2M.
- ^ Page Module:Citation/CS1/styles.css has no content."SN 2003hl". Transient Name Server. IAU. Retrieved 14 December 2024.
- ^ Page Module:Citation/CS1/styles.css has no content.Yamaoka, H.; Ayani, K. (2003). "Supernovae 2003hl and 2003iq in NGC 772". International Astronomical Union Circular (8219): 2. Bibcode:2003IAUC.8219....2Y.
- ^ Page Module:Citation/CS1/styles.css has no content."NGC 772, Supernovae 2003hl and 2003iq". www.kopernik.org. Retrieved 2022-04-08.
- ^ Page Module:Citation/CS1/styles.css has no content."SN 2003iq". Transient Name Server. IAU. Retrieved 14 December 2024.
- ^ Page Module:Citation/CS1/styles.css has no content.Bishop, David. "Supernovae 2003hl and 2003iq in NGC 772". Rochester Astronomy. Retrieved 14 December 2024.
- ^ Page Module:Citation/CS1/styles.css has no content."SN 2022qze". Transient Name Server. IAU. Retrieved 14 December 2024.
- ^ Page Module:Citation/CS1/styles.css has no content."A Rival to the Milky Way". ESA Hubble. Retrieved 11 November 2019.
External links
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- Spiral Galaxy NGC 772; Elliptical Galaxy NGC 770
- NGC 772 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- NGC 772 (Arp 78) at Constellation Guide
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![Center of the galaxy imaged by the Hubble Space Telescope.[15]](/index.php?title=Special:Upload&wpDestFile=NGC_772_A_Rival_to_the_Milky_Way.jpg){kind=link}