Galaxy in the constellation Canes Venatici
NGC 5273 is alenticular galaxy located 54 millionlight-years[4] away in the northernconstellation ofCanes Venatici. This galaxy was discovered byWilliam Herschel on May 1, 1785.[8] It is positioned1+1⁄4° to the southeast of the star25 Canum Venaticorum.[5]
Themorphological classification of this galaxy is SA0(s),[4] indicating it is lenticular in form. It displays a faint, unbarred spiral structure within a generallyelliptical profile.[9] NGC 5273 is classified as a type 1.5Seyfert galaxy, with theX-ray emission from itsactive galactic nucleus undergoing significantabsorption.[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, allowingreverberation mapping of thesupermassive black hole at the core. This object has an estimated mass of(4.7±1.6)×106 M☉.[9]
- ^abVallenari, 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 atVizieR.
- ^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.
- ^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.
- ^abcdMerrell, 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.
- ^abcO'Meara, Stephen James (2007),Herschel 400 Observing Guide, Cambridge University Press, p. 193,ISBN 9780521858939.
- ^abVéron-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.
- ^"NGC 5273",SIMBAD,Centre de données astronomiques de Strasbourg, retrieved2023-11-07.
- ^Seligman, Courtney,"NGC Objects: NGC 5250 - 5299",Celestial Atlas, retrieved2023-11-10.
- ^abBentz, 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.
- ^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.
- ^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.
- Vincentelli, F. M.; et al. (February 2020), "X-ray reverberation lags from the 1.5 Seyfert galaxy NGC 5273",Monthly Notices of the Royal Astronomical Society,492 (1):1135–1141,arXiv:1912.06196,Bibcode:2020MNRAS.492.1135V,doi:10.1093/mnras/stz3511.
- Chromey, F. R. (November 1973), "Studies of Ir II galaxies. I. NGC 4753 and NGC 5273",Astronomy and Astrophysics,29:77–84,Bibcode:1973A&A....29...77C.
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