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  • 21 Aug, 2019

  • By, Wikipedia

NGC 3521
NGC 3521 is a flocculent intermediate spiral galaxy located in the constellation Leo. Its velocity with respect to the cosmic microwave background is 1167 ± 26 km/s, which corresponds to a Hubble distance of 56.1 ± 4.1 Mly (17.21 ± 1.26 Mpc). However, 26 non-redshift measurements give a much closer distance of 37.17 ± 1.83 Mly (11.395 ± 0.56 Mpc). It was discovered by German-British astronomer William Herschel on 22 February 1784.

NGC 3521 imaged by R Jay GaBany

NGC 3521 has a morphological classification of SAB(rs)bc, which indicates that it is a spiral galaxy with a trace of a bar structure (SAB), a weak inner ring (rs), and moderate to loosely wound arm structure (bc). The bar structure is difficult to discern, both because it has a low ellipticity and the galaxy is at a high inclination of 72.7° to the line of sight. The relatively bright bulge is nearly 3/4 the size of the bar, which may indicate the former is quite massive. The nucleus of this galaxy is classified as an HII LINER, as there is an H II region at the core and the nucleus forms a low-ionization nuclear emission-line region.

Supernova

One supernova has been observed in NGC 3521: SN 2024aecx (type Ic, mag. 14.543) was discovered by ATLAS on 16 December 2024. Astronomers originally classified it as type IIb, but spectroscopy suggests this supernova is very similar to SN 1994I.

References

  1. ^ "Results for object NGC 3521". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 2006-10-24.
  2. ^ Mao, Rui-Qing; et al. (December 2010), "An Extragalactic CO J = 3-2 Survey with the Heinrich Hertz Telescope", The Astrophysical Journal, 724 (2): 1336–1356, arXiv:1009.4906, Bibcode:2010ApJ...724.1336M, doi:10.1088/0004-637X/724/2/1336, S2CID 118390123.
  3. ^ "Hubble shears a "wooly" galaxy". ESA/Hubble. ESA/NASA. 21 September 2015. Retrieved 17 December 2024.
  4. ^ Liu, Guilin; et al. (July 2011), "The Super-linear Slope of the Spatially Resolved Star Formation Law in NGC 3521 and NGC 5194 (M51a)", The Astrophysical Journal, 735 (1): 63, arXiv:1104.4122, Bibcode:2011ApJ...735...63L, doi:10.1088/0004-637X/735/1/63, S2CID 119199965.
  5. ^ "Distance Results for NGC 3521". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 17 December 2024.
  6. ^ Seligman, Courtney. "New General Catalogue Objects: NGC 3521". Celestial Atlas. Retrieved 17 December 2024.
  7. ^ Buta, Ronald J.; et al. (2007), The de Vaucouleurs Atlas of Galaxies, Cambridge University Press, pp. 13–17, ISBN 978-0521820486.
  8. ^ Das, Mousumi; et al. (December 2003), "Central Mass Concentration and Bar Dissolution in Nearby Spiral Galaxies", The Astrophysical Journal, 582 (1): 190–195, arXiv:astro-ph/0208467, Bibcode:2003ApJ...582..190D, doi:10.1086/344480, S2CID 18713107.
  9. ^ "SN 2024aecx". Transient Name Server. IAU. Retrieved 17 December 2024.
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