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NGC 7828 information


NGC 7828
NGC 7828 (right) by Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationCetus
Right ascension00h 06m 27.1s[1]
Declination−13° 24′ 58″[1]
Redshift0.019110 ± 0.000050 [1]
Heliocentric radial velocity5,729 ± 15 km/s[1]
Distance294 ± 4.2 Mly (90.25 ± 1.3 Mpc)[1]
Apparent magnitude (V)13.9[2]
Characteristics
TypeIm pec (Ring B) [1]
Apparent size (V)0.9 × 0.5[1]
Notable featuresInteracting galaxy
Other designations
IRAS 00038-1341, Arp 144, MCG -02-01-025, PGC 483, VV 272a

NGC 7828 is a peculiar galaxy in the constellation Cetus. The galaxy lies about 300 million light years away from Earth, which means, given its apparent dimensions, that NGC 7828 is approximately 75,000 light years across.[1] It was discovered by American astronomer Francis Leavenworth in 1886.[3] NGC 7828 forms a pair with its neighbor NGC 7829. The galaxy is included in Halton Arp's Atlas of Peculiar Galaxies in the elliptical galaxies emanating material category as Arp 144.

NGC 7828 is interacting with NGC 7829, lying about 30 arcseconds from its nucleus. The interaction of the two galaxies, which have similar mass, has led to the creation of an empty ring in NGC 7828. The nucleus of NGC 7828 is obscured in visual light, but it is more visible in the infrared.[4] The ring appears to be partial in H-alpha. The star formation rate of the ring galaxy is estimated to be 6.86 M per year.[5] The two galaxies are surrounded by a neutral hydrogen gas cloud extending to the southeast for 6 arcminutes and 3 arcminutes to the west.[6]

Two supernovae have been observed in NGC 7828, AT2018ewx and SN 2021ocs.[7] SN 2021ocs was a type Ic supernova discovered around maximum magnitude. Its spectrum was unusual, being dominated by oxygen and magnesium emission lines.[8] It was discovered on May 30, 2021, by the ATLAS[9] (Asteroid Terrestrial-impact Last Alert System) astronomical survey and had an apparent magnitude of 17.7.[10]

  1. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 7828. Retrieved 2024-03-26.
  2. ^ "Revised NGC Data for NGC 7828". spider.seds.org. Retrieved 30 March 2024.
  3. ^ Seligman, Courtney. "NGC 7828 (with NGC 7829 = Arp 144)". Celestial Atlas. Retrieved 19 November 2018.
  4. ^ Joy, Marshall; Ellis, H. B., Jr.; Tollestrup, E. V.; Brock, D.; Higdon, J. L.; Harvey, P. M. (July 1988). "The genesis of the ring galaxy ARP 144 (NGC 7828/29)". The Astrophysical Journal. 330: L29. Bibcode:1988ApJ...330L..29J. doi:10.1086/185198.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  5. ^ Romano, R.; Mayya, Y. D.; Vorobyov, E. I. (1 September 2008). "STELLAR DISKS OF COLLISIONAL RING GALAXIES. I. NEW MULTIBAND IMAGES, RADIAL INTENSITY AND COLOR PROFILES, AND CONFRONTATION WITH N -BODY SIMULATIONS". The Astronomical Journal. 136 (3): 1259–1289. arXiv:0807.1477. Bibcode:2008AJ....136.1259R. doi:10.1088/0004-6256/136/3/1259.
  6. ^ Higdon, James L. (March 1988). "Neutral hydrogen observations of ARP 144". The Astrophysical Journal. 326: 146. Bibcode:1988ApJ...326..146H. doi:10.1086/166075.
  7. ^ "Bright Supernova pages - Most prolific galaxies". www.rochesterastronomy.org. Retrieved 22 April 2024.
  8. ^ Kuncarayakti, H.; Maeda, K.; Dessart, L.; Nagao, T.; Fulton, M.; Gutiérrez, C. P.; Huber, M. E.; Young, D. R.; Kotak, R.; Mattila, S.; Anderson, J. P.; Ferrari, L.; Folatelli, G.; Gao, H.; Magnier, E.; Smith, K. W.; Srivastav, S. (1 December 2022). "Late-time H/He-poor Circumstellar Interaction in the Type Ic Supernova SN 2021ocs: An Exposed Oxygen–Magnesium Layer and Extreme Stripping of the Progenitor*". The Astrophysical Journal Letters. 941 (2): L32. arXiv:2210.01755. Bibcode:2022ApJ...941L..32K. doi:10.3847/2041-8213/aca672.
  9. ^ Smith, K. W.; Srivastav, S.; McBrien, O.; Smartt, S. J.; Gillanders, J.; Fulton, M.; Young, D. R.; Shingles, L.; McCollum, M.; Webb, C.; Chen, T. W.; Anderson, J.; Denneau, L.; Heinze, A.; Tonry, J. (2021-06-01). "ATLAS21ptp (AT2021ocs): discovery of a candidate SN in NGC 7828 (89 Mpc)". Transient Name Server AstroNote. 168: 1–168. Bibcode:2021TNSAN.168....1S.
  10. ^ "SN 2021ocs | Transient Name Server". www.wis-tns.org. Retrieved 2024-04-22.

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