Eisspeedway

NGC 3746

NGC 3746
Image of NGC 3746 located bottom right below NGC 3745 which was taken by Mount Lemmon Observatory
Observation data (J2000 epoch)
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 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

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

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

  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.
Quelle: https://en.wikipedia.org/wiki/NGC_3746