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NGC 1023

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NGC 1023
Hubble Space Telescope image of NGC 1023
Observation data (J2000 epoch)
ConstellationPerseus
Right ascension02h 40m 24.0s[1]
Declination+39° 03′ 48″[1]
Redshift0.002125[1]
Heliocentric radial velocity637 ± 4 km/s[1]
Distance~19 Mly (Light Travel-Time redshift-based)[1]
30 to 64 Mly (measured)[1]
Apparent magnitude (V)10.35[1]
Absolute magnitude (V)−21.2[2]
Characteristics
TypeSB0[1]
Apparent size (V)8.7' x 3.0'[1]
Other designations
NGC 1023, Arp 135, UGC 2154, MCG +06-06-073, PGC 10123

NGC 1023 is a barred lenticular galaxy in the northern constellation of Perseus. Alternatively, it is known as the Perseus Lenticular Galaxy.[3] Distance measurements vary from 9.3 to 19.7 million parsecs (30 to 64 million light-years),[1] where it is a member of the NGC 1023 group of galaxies in the Local Supercluster. NGC 1023 is included in Halton Arp's Atlas of Peculiar Galaxies, under the category "Galaxies with Nearby Fragments" under the number 135.[4]

NGC 1023 has been estimated to have about 490 globular clusters, consistent with similar early-type galaxies.[2] There is a supermassive black hole at the core with a mass of (4.4±0.5)×107 M☉.[5] The black hole was discovered by analyzing the dynamics of the galaxy.[6]

A number of small galaxies have been found around NGC 1023, the collection of which is labelled the "NGC 1023 Group."[7] The shape and motion of the neutral hydrogen gas around NGC 1023 suggest that it underwent a tidal interaction with one of its dwarf companions some time in the past.[8] NGC 1023 has a satellite galaxy named NGC 1023A, which is a Magellanic spiral galaxy; its globular cluster system is much smaller, estimated to be around six individuals.[2] A bridge of neutral hydrogen extends from NGC 1023 to NGC 1023A, which may indicate a possible interaction.[9]

References

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  1. ^ a b c d e f g h i j "NASA/IPAC Extragalactic Database". Results for NGC 1023. Retrieved 2012-10-17.
  2. ^ a b c Young, Michael D.; et al. (2012). "Globular Cluster Systems of Spiral and S0 Galaxies: Results from WIYN Imaging of NGC 1023, NGC 1055, NGC 7332, and NGC 7339". The Astronomical Journal. 144 (4): 103. arXiv:1210.4476. Bibcode:2012AJ....144..103Y. doi:10.1088/0004-6256/144/4/103. S2CID 62792507.
  3. ^ Stoyan, Ronald; Schurig, Stephan (2014). interstellarum Deep Sky Atlas. Erlangen: Cambridge University Press; Oculum-Verlag GmbH. ISBN 978-1-107-50338-0. OCLC 920437579.
  4. ^ Arp, Halton (1966). Atlas of Peculiar Galaxies. Pasadena, California: California Institute of Technology. Retrieved 5 Jan 2010. (webpage includes PDF link)
  5. ^ Graham, Alister W. (November 2008). "Populating the Galaxy Velocity Dispersion - Supermassive Black Hole Mass Diagram: A Catalogue of (Mbh, σ) Values". Publications of the Astronomical Society of Australia. 25 (4): 167–175. arXiv:0807.2549. Bibcode:2008PASA...25..167G. doi:10.1071/AS08013. S2CID 89905.{{cite journal}}: CS1 maint: postscript (link)
  6. ^ Bower, G. A.; et al. (March 20, 2001). "Evidence of a Supermassive Black Hole in the Galaxy NGC 1023 from the Nuclear Stellar Dynamics". The Astrophysical Journal. 550 (1): 75–86. arXiv:astro-ph/0011204. Bibcode:2001ApJ...550...75B. doi:10.1086/319730. ISSN 0004-637X. S2CID 118949563.
  7. ^ Tully, R. B. (1980). "Nearby groups of galaxies. I. The NGC 1023 group". Astrophysical Journal. 237: 390–403. Bibcode:1980ApJ...237..390T. doi:10.1086/157881.
  8. ^ Debattista, Victor P.; et al. (May 2002). "A fast bar in the post-interaction galaxy NGC 1023". Monthly Notices of the Royal Astronomical Society. 332 (1): 65–77. arXiv:astro-ph/0112288. Bibcode:2002MNRAS.332...65D. doi:10.1046/j.1365-8711.2002.05269.x.
  9. ^ Capaccioli, M.; et al. (November 1986). "Is NGC 1023/1023A an interacting system ?". Astronomy and Astrophysics. 169: 54–62. Bibcode:1986A&A...169...54C.
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