UGC 5460 is a barred spiral galaxy in the constellation of Ursa Major. Its velocity with respect to the cosmic microwave background for is 1,276±14 km/s, which corresponds to a Hubble distance of 61.4 ± 4.4 Mly (18.82 ± 1.34 Mpc).[1] In addition, two non redshift measurements give a distance of 58.1 ± 6.8 Mly (17.8 ± 2.1 Mpc).[2] The first known reference to this galaxy comes from Part 1 of the Morphological Catalogue of Galaxies, where it is listed as MCG +09-17-028.

The SIMBAD database lists UGC 5460 as an active galaxy nucleus candidate, i.e. it has a compact region at the center that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.[3]

NGC 3079 Group

UGC 5460 is a member of the NGC 3079 Group (also known as LGG 188), which contains six galaxies. The other five galaxies in the group are: NGC 3073, NGC 3079, UGC 5421, UGC 5459, and UGC 5479.[4]

Supernovae

Swift UVOT optical (left), UVOT UV (middle), and XRT X-ray (right) images of SN 2011ht and its host galaxy UGC 5460.

Two supernovae have been observed in UGC 5460:

  • SN 2011ht (type IIn, mag. 17) was discovered by Tom Boles on 29 September 2011.[5][6] This supernova was initially suspected of being a luminous blue variable.[5] Later analysis suggested that it belongs to an unusual group of SNe IIn, including SN 1994W and SN 2009kn, and perhaps SN 2005cl, that warrants a new designation of Type IIn-P.[7]
  • SN 2015as (type IIb, mag. 16) was discovered by Ken'ichi Nishimura on 15 November 2015.[8] Although initially classified as type II,[9] later analysis concluded it to be type IIb.[10]

References

  1. ^ a b c d e f g h i j "Results for object UGC 5460". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 12 February 2025.
  2. ^ "Distance Results for UGC 5460". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 12 February 2025.
  3. ^ "UGC 5460". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 12 February 2025.
  4. ^ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
  5. ^ a b Boles, Tom; Pastorello, A.; Stanishev, V.; Smartt, S. J.; Fraser, M.; Lindborg, M. (2011). "PSN J10081059+5150570 in UGC 5460". Central Bureau Electronic Telegrams (2851): 1. Bibcode:2011CBET.2851....1B.
  6. ^ "SN 2011ht". Transient Name Server. IAU. Retrieved 12 February 2025.
  7. ^ Mauerhan, Jon C.; Smith, Nathan; Silverman, Jeffrey M.; Filippenko, Alexei V.; Morgan, Adam N.; Cenko, S. Bradley; Ganeshalingam, Mohan; Clubb, Kelsey I.; Bloom, Joshua S.; Matheson, Thomas; Milne, Peter (2013). "SN 2011ht: Confirming a class of interacting supernovae with plateau light curves (Type IIn-P)". Monthly Notices of the Royal Astronomical Society. 431 (3): 2599–2611. arXiv:1209.0821. doi:10.1093/mnras/stt360.
  8. ^ "SN 2015as". Transient Name Server. IAU. Retrieved 12 February 2025.
  9. ^ Tartaglia, L.; Pastorello, A.; Benetti, S.; Cappellaro, E.; Elias-Rosa, N.; Ochner, P.; Terreran, G.; Tomasella, L.; Turatto, M. (2015). "Asiago spectroscopic classification of PSN J01072038+3223598 and PSN J10081137+5150409". The Astronomer's Telegram. 8291: 1. Bibcode:2015ATel.8291....1T.
  10. ^ Gangopadhyay, Anjasha; Misra, Kuntal; Pastorello, A.; Sahu, D. K.; Tomasella, L.; Tartaglia, L.; Singh, Mridweeka; Dastidar, Raya; Srivastav, S.; Ochner, P.; Brown, Peter J.; Anupama, G. C.; Benetti, S.; Cappellaro, E.; Kumar, Brajesh; Kumar, Brijesh; Pandey, S. B. (2018). "SN 2015as: A low-luminosity Type IIb supernova without an early light-curve peak". Monthly Notices of the Royal Astronomical Society. 476 (3): 3611. arXiv:1802.06731. Bibcode:2018MNRAS.476.3611G. doi:10.1093/mnras/sty478.
Allikas: https://en.wikipedia.org/wiki/UGC_5460
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