NGC 5532

NGC 5532
NGC 5532 by SDSS
Observation data (J2000 epoch)
ConstellationBoötes
Right ascension14h 16m 52.9s[1]
Declination+10° 48′ 27″[1]
Redshift0.024710 ± 0.000010 [1]
Heliocentric radial velocity7,408 ± 3 km/s[1]
Distance210 ± 85 Mly (64.5 ± 26.1 Mpc)[1]
Apparent magnitude (V)12.59 [2]
Characteristics
TypeD [2]
Apparent size (V)1.32′ × 1.02′[1]
Notable featuresRadio galaxy
Other designations
UGC 9137, 3C 296, 4C +10.39, MCG +02-36-062, PKS 1414+11, PGC 51006[1]

NGC 5532 is an elliptical galaxy located in the constellation Boötes. It is located at a distance of about 250 million light years from Earth, which, given its apparent dimensions, means that NGC 5532 is about 110,000 light years across.[1] It was discovered by William Herschel on March 15, 1784.[3] It is a Fanaroff–Riley type 1 (FR1) radio galaxy.[1]

NGC 5532 is an elliptical galaxy located in a galaxy group. In the centre of the galaxy lies a warped disk, while the isophotes display boxiness and the centre of the galaxy doesn't coincide with the isophotal centre.[4] The core appears obstructed in X-rays, with a column density of (1.0±0.5)×1022 cm-2, which is considered high for a FR1 galaxy.[5] In the centre of the galaxy lies a supermassive black hole whose mass is estimated to be 108.8 (630 millions) M☉ based on the M–sigma relation.[6]

Two straight radio jets emerge from the galaxy core and form sharp edged lobes that appear to engulf the jets, although this could be a projection effect. The jets are typical of a Fanaroff–Riley type 1 radio galaxy, with faint bases that brighten abruptly 2.7 arcseconds from the nucleus and then the brightness gets lower at the distance from the core increases. The jet appears moving with relativistic speeds, 0.8 times the speed of light at the start of the jet.[7] The northern jet has been observed in X-rays by the Chandra X-ray Observatory, with emission detected at distances between 2 and 10 arcseconds from the core.[5]

NGC 5532 is located in a galaxy group that also includes the galaxy NGC 5531.[5] NGC 5532 forms a pair with lenticular galaxy NGC 5532A, which lies at a distance of about 16 kpc.[4] 21 galaxies have been as members of the group, lying within one megaparsec from NGC 5532.[8]

Two supernovae have been observed in NGC 5532: SN 2007ao (type Ia-p mag. 17.7),[9] and SN 2023omo (type Ia-91bg-like, mag. 18.3).[10]

  1. ^ a b c d e f g h i "NASA/IPAC Extragalactic Database". Results for NGC 5532. Retrieved 2023-05-06.
  2. ^ a b "NGC 5532". simbad.u-strasbg.fr. Retrieved 12 July 2023.
  3. ^ Seligman, Courtney. "NGC 5532". Celestial Atlas. Retrieved 19 November 2018.
  4. ^ a b Martel, Andre R.; Turner, Neal J.; Sparks, William B.; Baum, Stefi A. (October 2000). "Nuclear Gas and Dust Disks in Nearby 3CR Elliptical Galaxies". The Astrophysical Journal Supplement Series. 130 (2): 267–338. doi:10.1086/317356. S2CID 120991213.
  5. ^ a b c Hardcastle, M. J.; Worrall, D. M.; Birkinshaw, M.; Laing, R. A.; Bridle, A. H. (11 April 2005). "A Chandra observation of the X-ray environment and jet of 3C 296". Monthly Notices of the Royal Astronomical Society. 358 (3): 843–850. arXiv:astro-ph/0203374. doi:10.1111/j.1365-2966.2005.08765.x.
  6. ^ Wu, Qingwen; Cao, Xinwu; Wang, Ding-Xiong (1 July 2011). "Evidence for Rapidly Rotating Black Holes in Fanaroff-Riley I Radio Galaxies". The Astrophysical Journal. 735 (1): 50. arXiv:1104.3235. doi:10.1088/0004-637X/735/1/50. S2CID 119190787.
  7. ^ Laing, R. A.; Canvin, J. R.; Bridle, A. H.; Hardcastle, M. J. (21 October 2006). "A relativistic model of the radio jets in 3C 296". Monthly Notices of the Royal Astronomical Society. 372 (2): 510–536. doi:10.1111/j.1365-2966.2006.10903.x. hdl:2299/382. S2CID 14679002.
  8. ^ Miller, Neal A.; Ledlow, Michael J.; Owen, Frazer N.; Hill, John M. (June 2002). "Redshifts for a Sample of Radio-selected Poor Clusters". The Astronomical Journal. 123 (6): 3018–3040. doi:10.1086/340694. hdl:2060/20020082932. S2CID 16610337.
  9. ^ "List of Supernovae". www.cbat.eps.harvard.edu. Retrieved 12 July 2023.
  10. ^ Transient Name Server entry for SN 2023omo. Retrieved 7 August 2023.