Astronomy:NGC 3184

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Short description: Galaxy in the constellation Ursa Major
NGC 3184
NGC3184 3.6 5.8 8.0 microns spitzer.png
NGC 3184 as observed with the Spitzer Space Telescope, as part of the Spitzer Infrared Nearby Galaxy Survey. The blue colors represent the 3.6 micrometre emission from stars. The green and red colors represent the 5.8 and 8.0 micrometre emission from polycyclic aromatic hydrocarbons and possibly dustright
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension 10h 18m 17.0s[1]
Declination+41° 25′ 28″[1]
Redshift0.001975[1]
Helio radial velocity592 ± 1 km/s[1]
Distance39.8 ± 12 Mly
(12.2 ± 3.7 Mpc)[2]
Apparent magnitude (V)10.4[1]
Characteristics
TypeSA(s)b: II
Apparent size (V)7.4 × 6.9
Other designations
UGC 5557, PGC 30087

NGC 3184, the Little Pinwheel Galaxy, is a spiral galaxy approximately 40 million light-years away[2] in the constellation Ursa Major. Its name comes from its resemblance to the Pinwheel Galaxy. It has two HII regions named NGC 3180[3] and NGC 3181.[4]

NGC 3184 houses a high abundance of heavy elements and SN 1999gi, a magnitude 14 Type II supernova detected on December 9, 1999.[5][6] Other supernovae in NGC 3184 include 1921B (mag 13.5), 1921C (mag 11) and 1937F (mag 13.5).[6]

The blue color of its spiral arms comes mostly from relatively few bright young blue stars. The bright stars that highlight the arms were created in huge density waves that circle the center.

Structure

NGC 3184 has two prominent spiral arms. They have constant pitch angles, which makes them both symmetrical.[7]

SN 2010dn

On May 31, 2010, Koichi Itagaki detected a magnitude 17 optical transient 33" east and 61" north of the center of NGC 3184 at coordinates 10 18 19.89 +41 26 28.8.[8] This event may be an outbursting luminous blue variable (LBV) star.[9] Archival Hubble and Spitzer images of NGC 3184 seem to show no progenitor for optical transient SN 2010dn.[10] SN 2010dn is just like SN 2008S and NGC 300-OT.[9] On day 2, SN 2010dn had an unfiltered magnitude of 17.1, corresponding to a peak absolute magnitude of roughly -13.3.[9]

Supernovae in NGC 3184[11]
Supernova apmag type
AT2019sfe 20.6 ?
2016bkv 14.8 II
2010dn 17.2 LBV
1999gi 14.0 II
1937F 13.5 ?
1921C 11.0 ?
1921B 13.5 ?
NGC 3184 showing supernova impostor 2010dn on June 02, 2010
Galaxies with several Supernovae
Galaxy number Declination
NGC 6946 (Fireworks) 10 +60
Arp 299 (NGC 3690 + IC 694) 9 +58
Messier 61 8 +04
Messier 100 7 +15
NGC 3184 7 +41
Messier 83 (Southern Pinwheel) 6 −29
NGC 2207 and IC 2163 6 −21
NGC 2276 6 +85
Messier 66 5 +12
Messier 101 (Pinwheel) 5 +54
NGC 309 5 −09

See also

References

  1. 1.0 1.1 1.2 1.3 1.4 "NASA/IPAC Extragalactic Database". Results for NGC 3184. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+3184&img_stamp=yes&extend=no. 
  2. 2.0 2.1 "Distance Results for NGC 3184". NASA/IPAC Extragalactic Database. http://nedwww.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+3184. 
  3. "NASA/IPAC Extragalactic Database". Results for NGC 3180. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+3180&img_stamp=yes&extend=no. 
  4. "NASA/IPAC Extragalactic Database". Results for NGC 3181. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+3181&img_stamp=yes&extend=no. 
  5. Daniel W. E. Green (1999-12-10). "Supernova 1999gi in NGC 3184 (Circular No. 7329)". Central Bureau for Astronomical Telegrams. http://www.cbat.eps.harvard.edu/iauc/07300/07329.html. 
  6. 6.0 6.1 David Bishop. "1999gi (main page)". supernovae.net (International Supernovae Network). http://www.rochesterastronomy.org/snimages/sn1999/index.html#1999gi. 
  7. Honig, Z.N.; Reid, M.J. (February 2015). "Characteristics of Spiral Arms in Late-type Galaxies". The Astrophysical Journal 800 (1): 5387–5394. doi:10.1088/0004-637X/800/1/53. PMID 53. Bibcode2015ApJ...800...53H. https://ui.adsabs.harvard.edu/abs/2015ApJ...800...53H/abstract. Retrieved November 10, 2022. 
  8. David Bishop. "Latest Supernovae". supernovae.net (International Supernovae Network). http://www.rochesterastronomy.org/snimages/. 
  9. 9.0 9.1 9.2 Smith, Nathan; Weidong, Li; Silverman, Jeffrey; Ganeshalingam, Mo (2010). "Luminous Blue Variable eruptions and related transients: Diversity of progenitors and outburst properties". Monthly Notices of the Royal Astronomical Society 415 (1): 773–810. doi:10.1111/j.1365-2966.2011.18763.x. Bibcode2011MNRAS.415..773S. 
  10. "ATEL 2655: HST/Spitzer limits on the progenitor of SN2010dn in NGC3184". Astronomers Telegram. 2010-06-01. http://www.astronomerstelegram.org/?read=2655. 
  11. 2019sfe in NGC 3184 (David Bishop)

External links