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NGC 5273
Sloan Digital Sky Survey image of NGC 5273
Observation data (J2000 epoch)
Right ascension13h 42m 08.380s [1]
Declination+35° 39′ 15.47″ [1]
Redshift0.00362 [2]
Distance54.1 ± 6.8  Mly (16.6 ± 2.1  Mpc) [3] [4]
Apparent magnitude (V)11.6 [5]
13.12 [6]
Apparent magnitude (B)14.01 [6]
Characteristics
TypeSA0(s) [4]
Apparent size (V)2.8′ × 2.4′ [5]
Other designations
NGC 5273, UGC 8675, PGC 48521 [7]

NGC 5273 is a lenticular galaxy located 54 million light-years [4] away in the northern constellation of Canes Venatici. This galaxy was discovered by William Herschel on May 1, 1785. [8] It is positioned 1+1⁄4° to the southeast of the star 25 Canum Venaticorum. [5]

The morphological classification of this galaxy is SA0(s), [4] indicating it is lenticular in form. It displays a faint, unbarred spiral structure within a generally elliptical profile. [9] NGC 5273 is classified as a type 1.5 Seyfert galaxy, with the X-ray emission from its active galactic nucleus undergoing significant absorption. [10] However, data collected between the year 2000 and 2022 suggest this is a changing–look Seyfert, with the type ranging from 1 to 1.8/1.9. [11] The activity level shows strong variability, allowing reverberation mapping of the supermassive black hole at the core. This object has an estimated mass of (4.7±1.6)×106  M☉. [9]

References

  1. ^ a b Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID  244398875. Gaia DR3 record for this source at VizieR.
  2. ^ Pahari, Mayukh; et al. (September 2017), "Detection of the high-energy cut-off from the Seyfert 1.5 galaxy NGC 5273", Monthly Notices of the Royal Astronomical Society, 470 (3): 3239–3248, arXiv: 1706.02489, Bibcode: 2017MNRAS.470.3239P, doi: 10.1093/mnras/stx1455.
  3. ^ Tully, R. Brent; et al. (August 2016), "Cosmicflows-3", The Astronomical Journal, 152 (2): 21, arXiv: 1605.01765, Bibcode: 2016AJ....152...50T, doi: 10.3847/0004-6256/152/2/50, S2CID  250737862, 50.
  4. ^ a b c d Merrell, Katie A.; et al. (May 2023), "The Mass of the Black Hole in NGC 5273 from Stellar Dynamical Modeling", The Astrophysical Journal, 949 (1): 13, arXiv: 2212.02484, Bibcode: 2023ApJ...949...13M, doi: 10.3847/1538-4357/acc4bc, 13.
  5. ^ a b c O'Meara, Stephen James (2007), Herschel 400 Observing Guide, Cambridge University Press, p. 193, ISBN  9780521858939.
  6. ^ a b 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.
  7. ^ "NGC 5273", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2023-11-07.
  8. ^ Seligman, Courtney, "NGC Objects: NGC 5250 - 5299", Celestial Atlas, retrieved 2023-11-10.
  9. ^ a b Bentz, Misty C.; et al. (November 2014), "The Mass of the Central Black Hole in the Nearby Seyfert Galaxy NGC 5273", The Astrophysical Journal, 796 (1): 8, arXiv: 1409.5794, Bibcode: 2014ApJ...796....8B, doi: 10.1088/0004-637X/796/1/8, S2CID  118540233, 8.
  10. ^ Trippe, M. L.; et al. (December 2010), "A Multi-wavelength Study of the Nature of Type 1.8/1.9 Seyfert Galaxies", The Astrophysical Journal, 725 (2): 1749–1767, arXiv: 1010.2750, Bibcode: 2010ApJ...725.1749T, doi: 10.1088/0004-637X/725/2/1749, S2CID  118395311.
  11. ^ Neustadt, J. M. M.; et al. (May 2023), "Multiple flares in the changing-look AGN NGC 5273", Monthly Notices of the Royal Astronomical Society, 521 (3): 3810–3829, arXiv: 2211.03801, Bibcode: 2023MNRAS.521.3810N, doi: 10.1093/mnras/stad725.

Further reading

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