NGC 3746

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NGC 3746
Image of NGC 3746 located bottom right below NGC 3745 which was taken by Mount Lemmon Observatory
Observation data
ConstellationLeo
Right ascension11hr 37m 43.622s
Declination+22d 00m 35.38s
Redshift0.030072
Heliocentric radial velocity9,015 km/s
Distance449 Mly (137.66 Mpc)
Group or clusterCopeland Septet
Apparent magnitude (V)15.0
Characteristics
TypeSB(r)b, RET
Size165,000 ly
Other designations
PGC 35997, UGC 6597, CGCG 127-006, MCG +04-28-005, Copeland Septet NED02, 2MASX J11374364+2200349, HCG 057B, 2MASS J11374363+2200353, WBL 343-001, NSA 139936, SDSS J113743.62+220035.3, LEDA 35997

NGC 3746 is a large barred spiral galaxy with a ring structure[1] located in the Leo constellation.[2] It is located 449 million light-years from the Solar System and has an approximate diameter of 165,000 thousand light-years.[3] NGC 3746 was discovered by Ralph Copeland on 9 February 1874 with subsequent observations made by Hermann Kobold, Lawrence Parsons and John Louis Emil Dreyer.[4]

The luminosity class of NGC 3746 is II and it has a broad H II region with a recessed core (RET).[3]

Supernovae[edit]

Two supernovae have been discovered in NGC 3746 so far: SN 2002ar and SN 2005ba.

SN 2002ar

SN 2002ar[5] was discovered by Dr W.D. Li from the University of California, Berkeley via unfiltered CCD images which was taken by the 0.8-m Katzman Automatic Imagining Telescope on 3 and 4 February 2002.[6] It was located 3".3 east and 0".5 south of the nucleus.[6] The supernova was Type la.[7][5]

SN 2005ba

SN 2005ba[8] was discovered on 1 April 2005 by Norwegian scientists Arne Danielsen, Mikkel Steine, and Stale Kildahl via unfiltered images taken from a 'Celestron 14' reflector at Veggli, Norway.[9] It was located 14".6 west and 4".0 north of the nucleus.[10] The supernova was Type II.[11][8]

Copeland Septet[edit]

Sloan Digital Sky Survey image of NGC 3746 alongside other members of Copeland Septet.

NGC 3746 is a member of the Copeland Septet which comprises 7 galaxies discovered by Copeland in 1874.[12] The other 6 members are NGC 3748, NGC 3754, NGC 3753, NGC 3750, NGC 3745 and NGC 3751. Together, they are known as Hickson 57 and Arp 320.[13]

References[edit]

  1. ^ "HyperLeda -object description". atlas.obs-hp.fr. Retrieved 2024-05-01.
  2. ^ Astronomy, Go. "NGC 3746 | galaxy in Leo | NGC List | GO ASTRONOMY". Go-Astronomy.com. Retrieved 2024-05-01.
  3. ^ a b "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-05-01.
  4. ^ "New General Catalog Objects: NGC 3700 - 3749". cseligman.com. Retrieved 2024-05-01.
  5. ^ a b "SN 2002ar | Transient Name Server". www.wis-tns.org. Retrieved 2024-05-01.
  6. ^ a b "IAUC 7819: 2002ar; 2002as; 2002ao; Corrs". www.cbat.eps.harvard.edu. Retrieved 2024-05-01.
  7. ^ Filippenko, A. V.; Chornock, R. (2002-02-01). "Supernovae 2002ao, 2002ap, 2002ar, 2002au, 2002av". International Astronomical Union Circular (7825): 1. Bibcode:2002IAUC.7825....1F. ISSN 0081-0304.
  8. ^ a b "SN 2005ba | Transient Name Server". www.wis-tns.org. Retrieved 2024-05-01.
  9. ^ Kildahl, S.; Danielsen, A.; Steine, M.; Trondal, O. (2005-04-01). "Supernova 2005ba in NGC 3746". International Astronomical Union Circular (8503): 2. Bibcode:2005IAUC.8503....2K. ISSN 0081-0304.
  10. ^ "Bright Supernovae - 2005". www.rochesterastronomy.org. Retrieved 2024-05-01.
  11. ^ Foley, R. J.; Ganeshalingam, M.; Wong, D. S.; Swift, B. J.; Filippenko, A. V. (2005-04-01). "Supernova 2005ba in NGC 3746". International Astronomical Union Circular (8510): 2. Bibcode:2005IAUC.8510....2F. ISSN 0081-0304.
  12. ^ Bakich, Michael E. (2024-01-01). "Copeland's Septet". Astronomy Magazine. Retrieved 2024-05-01.
  13. ^ "Copeland's Septet (Hickson Compact Group 57) – Constellation Guide". www.constellation-guide.com. Retrieved 2024-05-01.
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