NGC 5793
Hubble Space Telescope image of NGC 5793[1]
Observation data (J2000 epoch)
ConstellationLibra
Right ascension14h 59m 24.807s[2]
Declination−16° 41′ 36.55″[2]
Redshift0.011645[3]
Heliocentric radial velocity3,442±72 km/s[4]
Distance150 Mly (46 Mpc)[4]
Apparent magnitude (V)13.32[5]
Apparent magnitude (B)14.47[5]
Characteristics
TypeSb, Seyfert 2e[4]
Apparent size (V)1.160′ × 0.394′[2] (NIR)
Other designations
2MASX J14592480-1641365, NGC 5793, LEDA 49264[6]

NGC 5793 is an active spiral galaxy located approximately 150 million light years away in the constellation Libra. It is classified as a Type 2 Seyfert galaxy[4] and was discovered by Francis Leavenworth in 1886.[1][7] The galactic plane is inclined at an angle of 73°, giving it an oval, nearly edge-on appearance with the major axis aligned along a position angle of 150°.[4]

Seyfert galaxies such as NGC 5793 are known to house megamasers. Megamasers can have a luminosity of thousands of times greater than the Sun.[1] Neutral hydrogen has been detected against the galactic nucleus. This means that NGC 5793 has an estimated HI cloud size of ≈15 pc and an estimated atomic gas density of ≈200 cm -3.[8]

References

  1. 1 2 3 "Secrets at the heart of NGC 5793". www.spacetelescope.org. ESA. March 17, 2014. Retrieved 30 May 2019.
  2. 1 2 3 Skrutskie, Michael F.; et al. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708. ISSN 0004-6256. S2CID 18913331.
  3. ↑ "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. California Institute of Technology. Retrieved 30 May 2019.
  4. 1 2 3 4 5 Hagiwara, Y.; et al. (August 2000). "Probing circumnuclear molecular gas in NGC 5793 with OH absorption". Astronomy and Astrophysics. 360: 49-56. Bibcode:2000A&A...360...49H.
  5. 1 2 Véron-Cetty, M.-P.; Véron, P. (2010). "A catalogue of quasars and active nuclei: 13th edition". Astronomy & Astrophysics. 518 (A10): A10. Bibcode:2010A&A...518A..10V. doi:10.1051/0004-6361/201014188.
  6. ↑ "NGC 5793". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 30 May 2019.
  7. ↑ Seligman, Courtney. "New General Catalog Objects: NGC 5750 - 5799". New General Catalog Objects: NGC 5750 - 5799. Retrieved 30 May 2019.
  8. ↑ Pihlström, Y. M.; et al. (November 1999). "VLBI observations of high-opacity HI gas in NGC 5793". New Astronomy Reviews. 43 (8–10): 647–650. Bibcode:1999NewAR..43..647P. doi:10.1016/S1387-6473(99)00071-8.


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