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  3. UGC 11397 - Wikipedia
UGC 11397 - Wikipedia
Coordinates: Sky map 19h 03m 49.1379s, +33° 50′ 41.178″
From Wikipedia, the free encyclopedia

UGC 11397
A spiral galaxy, seen at an angle that gives it an oval shape. It has two spiral arms that curl out from the centre. They start narrow but broaden out as they wrap around the galaxy before merging into a faint halo. The galaxy’s disc is golden in the centre with a bright core, and pale blue outside that. A swirl of dark dust strands and speckled blue star-forming regions follow the arms through the disc.
UGC 11397 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationLyra
Right ascension19h 03m 49.1379s[1]
Declination+33° 50′ 41.178″[1]
Redshift0.015107±0.000009[1]
Heliocentric radial velocity4,529±3 km/s[1]
Distance257.66 ± 3.08 Mly (79.000 ± 0.945 Mpc)[1]
Apparent magnitude (V)13.7[1]
Characteristics
TypeSBa[1]
Size~121,600 ly (37.27 kpc) (estimated)[1]
Apparent size (V)1.1′ × 0.6′[1]
Other designations
IRAS 19019+3346, 2MASX J19034916+3350407, PGC 62725, CGCG 202-003[1]

UGC 11397 is a barred spiral galaxy in the constellation of Lyra. Its velocity with respect to the cosmic microwave background is 4,361±12 km/s, which corresponds to a Hubble distance of 209.8 ± 14.7 Mly (64.31 ± 4.51 Mpc).[1] However, three non-redshift measurements give a farther distance of 257.66 ± 3.08 Mly (79.000 ± 0.945 Mpc).[2] The first known reference to this galaxy comes from volume III of the Catalogue of Galaxies and of Clusters of Galaxies compiled by Fritz Zwicky in 1966, where it was listed as CGCG 202-003.[3]

UGC 11397 is a Seyfert II Galaxy, i.e. it has a quasar-like nucleus with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.[4][5]

The center of UGC 11397 harbors a supermassive black hole, with a mass of 174 million M☉.[6][7]

References

  1. ^ a b c d e f g h i j k "Results for object UGC 11397". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 18 June 2025.
  2. ^ "Distance Results for UGC 11397". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 18 June 2025.
  3. ^ Zwicky, Fritz; Herzog, E. (1966). Catalogue of Galaxies and of Clusters of Galaxies. Vol. III. California Institute of Technology. pp. 106–107. Bibcode:1966cgcg.book.....Z. Archived from the original on 26 April 2022. Retrieved 22 June 2025.{{cite book}}: CS1 maint: bot: original URL status unknown (link)
  4. ^ "UGC 11397". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 18 June 2025.
  5. ^ Parisi, P.; Masetti, N.; Rojas, A. F.; Jiménez-Bailón, E.; Chavushyan, V.; Palazzi, E.; Bassani, L.; Bazzano, A.; Bird, A. J.; Galaz, G.; Minniti, D.; Morelli, L.; Ubertini, P. (2014). "Accurate classification of 75 counterparts of objects detected in the 54-month Palermo Swift/BAT hard X-ray catalogue". Astronomy and Astrophysics. 561: A67. arXiv:1311.1458. Bibcode:2014A&A...561A..67P. doi:10.1051/0004-6361/201322409.
  6. ^ "Centre of activity". ESA/Hubble. ESA and NASA. 22 June 2025. Retrieved 22 June 2025.
  7. ^ Arzoumanian, Zaven; Baker, Paul T.; Brazier, Adam; Brook, Paul R.; Burke-Spolaor, Sarah; Becsy, Bence; Charisi, Maria; Chatterjee, Shami; Cordes, James M.; Cornish, Neil J.; Crawford, Fronefield; Cromartie, H. Thankful; Decesar, Megan E.; Demorest, Paul B.; Dolch, Timothy (1 June 2021). "The NANOGrav 11 yr Data Set: Limits on Supermassive Black Hole Binaries in Galaxies within 500 Mpc". The Astrophysical Journal. 914 (2): 121. arXiv:2101.02716. Bibcode:2021ApJ...914..121A. doi:10.3847/1538-4357/abfcd3. ISSN 0004-637X.
  • Media related to UGC 11397 at Wikimedia Commons
  • UGC 11397 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images


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