NGC 262

NGC 262
NGC 262 imaged by Legacy Surveys.
Observation data (J2000 epoch)
ConstellationAndromeda
Right ascension00h 48m 47.141479s[1][2]
Declination+31° 57′ 25.0845702″[1][2]
Redshift0.01466916±0.0005[3]
Heliocentric radial velocity4,365±150 km/s[3]
Galactocentric velocity4,397.7±150 km/s[3]
Distance213.3 ± 15.00 Mly (65.4 ± 4.6 Mpc)h−1
0.6774
(Comoving)[4]
200 Mly (61.32 Mpc)h−1
0.6774
(Light-travel)[4]
Group or clusterNGC 315 Group
Apparent magnitude (V)13.06±0.19[5][2]
Apparent magnitude (B)13.90±0.19[5][2]
magnitude (J)11.240±0.033[6][2]
magnitude (H)10.554±0.044[6][2]
magnitude (K)10.097±0.047[6][2]
Characteristics
TypeSA0/a?(s): Sy2[4]
Size99,249 ly × 93,313 ly
(30.43 kpc × 28.61 kpc)
(diameter; 25.0 B-mag arcsec−2)[4][a]
101,110 ly × 78,865 ly
(31.00 kpc × 24.18 kpc)
(diameter; "total" magnitude)[4][a]
Apparent size (V)2.1′ × 1.9′[7]
H I scale length (physical)400 kpc (1,300,000 ly)[8][9]
Notable featuresSurounded by a large H I disk
Other designations
IRAS 00461+3141, 2MASX J00484711+3157249, UGC 499, MCG +05-03-008, Mrk 348, PGC 2855, CGCG 501-020[4]

NGC 262 (also known as Markarian 348) is a Seyfert 2 spiral galaxy located 65.4 megaparsecs (213 million light-years) away in the constellation Andromeda.[8][2] It was discovered on 17 September 1885 by Lewis A. Swift.[7]

NGC 262 was tidally disturbed by the gravitational forces of smaller galaxies, which resulted in a surrounding large cloud over 10 times larger than the Milky Way.[9] It is also a member of the NGC 315 Group (also known as LGG 14), which contains 42 galaxies, including NGC 226, NGC 243, NGC 266, NGC 311, NGC 315, NGC 338, IC 43, IC 66, and IC 69, among others.[10]

Properties

NGC 262 is very unusual when compared to a regular spiral galaxy of its type.[8] Similar to Malin 1, it is surrounded by a very huge cloud of neutral hydrogen extending roughly 400 kiloparsecs (1,300,000 light-years) across,[8][9] which is probably caused by the tidal stripping of smaller galaxies. As such, it has been thus described as the largest known spiral galaxy.[11][9] However, the isophotal diameters of NGC 262 are much smaller with only up to 31 kiloparsecs (101,000 light-years), leaving larger isophotal diameters measured for many other spiral galaxies such as Andromeda Galaxy, Pinwheel Galaxy, UGC 2885, and NGC 6872.[4][a]

The cloud has an apparent mass of approximately 50 billion solar masses (M☉) at a distance of 88 kiloparsecs (287,000 light-years)[8] from the nucleus of NGC 262.[8] The cloud is spiral-shaped with at least one arm, and possibly another one extending throughout the galaxy. The galaxy holds approximately 15 trillion stars.

See also

Notes

  1. ^ a b c The quick-look major axis physical diameters given by NED of 10.01 by 9.41 kiloparsecs (32,600 by 30,700 light-years) and 10.19 by 7.95 kiloparsecs (33,200 by 25,900 light-years) were based on a distance estimate of 21.5 megaparsecs (70.12 million light-years). The quoted diameters in this infobox were based on NED's provided scale "Virgo + GA + Shapley" of 317 parsecs/arcsec multiplied with given angular diameters.

References

  1. ^ a b Charlot, P.; Jacobs, C. S.; Gordon, D.; Lambert, S.; De Witt, A.; Böhm, J.; Fey, A. L.; Heinkelmann, R.; Skurikhina, E.; Titov, O.; Arias, E. F.; Bolotin, S.; Bourda, G.; Ma, C.; Malkin, Z.; Nothnagel, A.; Mayer, D.; MacMillan, D. S.; Nilsson, T.; Gaume, R. (2020). "The third realization of the International Celestial Reference Frame by very long baseline interferometry". Astronomy and Astrophysics. 644: A159. arXiv:2010.13625. Bibcode:2020A&A...644A.159C. doi:10.1051/0004-6361/202038368.
  2. ^ a b c d e f g h NGC 262
  3. ^ a b c Koss, Michael J.; et al. (2022). "BASS. XXII. The BASS DR2 AGN Catalog and Data". The Astrophysical Journal Supplement Series. 261 (1): 2. arXiv:2207.12432. Bibcode:2022ApJS..261....2K. doi:10.3847/1538-4365/ac6c05.
  4. ^ a b c d e f g NGC 262 on NASA/IPAC Extragalactic Database
  5. ^ a b Gil De Paz, Armando; Boissier, Samuel; Madore, Barry F.; Seibert, Mark; Joe, Young H.; Boselli, Alessandro; Wyder, Ted K.; Thilker, David; Bianchi, Luciana; Rey, Soo-Chang; Rich, R. Michael; Barlow, Tom A.; Conrow, Tim; Forster, Karl; Friedman, Peter G.; Martin, D. Christopher; Morrissey, Patrick; Neff, Susan G.; Schiminovich, David; Small, Todd; Donas, José; Heckman, Timothy M.; Lee, Young-Wook; Milliard, Bruno; Szalay, Alex S.; Yi, Sukyoung (2007). "The GALEX Ultraviolet Atlas of Nearby Galaxies". The Astrophysical Journal Supplement Series. 173 (2): 185. arXiv:astro-ph/0606440. Bibcode:2007ApJS..173..185G. doi:10.1086/516636.
  6. ^ a b c Skrutskie, M. F.; et al. (2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163. Bibcode:2006AJ....131.1163S. doi:10.1086/498708.
  7. ^ a b Seligman, Courtney. "New General Catalogue Objects: NGC 262". Celestial Atlas. Retrieved 18 November 2024.
  8. ^ a b c d e f Huchra, J. (May 15, 1980). "The optical properties of the unusual galaxy Markarian 348". The Astrophysical Journal. 238: 11–12. Bibcode:1980ApJ...238L..11H. doi:10.1086/183246.
  9. ^ a b c d "The New York Times". Distant galaxy found to be largest known. 1987-03-13.
  10. ^ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
  11. ^ "An interacting colossus". ESA/Hubble. ESA and NASA. Retrieved 18 November 2024.
  • Media related to NGC 262 at Wikimedia Commons
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