Astronomy:NGC 3756

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NGC 3756
NGC 3756 imaged by SDSS
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension 11h 36m 48.0146s[1]
Declination+54° 17′ 36.930″[1]
Redshift0.004300±0.00000500[1]
Helio radial velocity1,289±1 km/s[1]
Distance63.45 ± 2.22 Mly (19.454 ± 0.682 Mpc)[1]
Group or clusterNGC 3898 group (LGG 250)
Apparent magnitude (V)12.11[1]
Characteristics
TypeSAB(rs)bc[1]
Size~92,300 ly (28.29 kpc) (estimated)[1]
Apparent size (V)4.2′ × 2.1′[1]
Other designations
IRAS 11340+5434, UGC 6579, MCG+09-19-134, PGC 35931[1]

NGC 3756 is a intermediate spiral galaxy in the constellation of Ursa Major. Its velocity with respect to the cosmic microwave background is 1,466±12 km/s, which corresponds to a Hubble distance of 70.5 ± 5.0 Mly (21.62 ± 1.53 Mpc).[1] Additionally, 28 non-redshift measurements give a similar mean distance of 63.45 ± 2.22 Mly (19.454 ± 0.682 Mpc).[2] It was discovered by German-British astronomer William Herschel on 14 April 1789.[3]

NGC 3756 has a possible active galactic nucleus, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.[4][5]

NGC 3898 group

NGC 3756 is a member of the NGC 3898 group (also known as LGG 250), which contains at least nine galaxies. The other members of the group are NGC 3733, NGC 3794, NGC 3846, NGC 3846A, NGC 3850, NGC 3898, NGC 3982, and UGC 6894.[6][7]

Supernova

One supernova has been observed in NGC 3756:

  • SN 1975T (type unknown, mag. 17.5) was discovered by Swiss astronomer Paul Wild on 28 December 1975.[8][9] It reached maximum brightness (mag. 15.7) around 11 January 1976, and although never officially classfied, its light curve suggested that it was a Type II supernova.[10]

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 3756". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+3756. 
  2. ↑ "Distance Results for NGC 3756". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+3756. 
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 3756". https://cseligman.com/text/atlas/ngc37a.htm#3756. 
  4. ↑ Asmus, D.; Greenwell, C. L.; Gandhi, P.; Boorman, P. G.; Aird, J.; Alexander, D. M.; Assef, R. J.; Baldi, R. D. et al. (2020). "Local AGN survey (LASr): I. Galaxy sample, infrared colour selection, and predictions for AGN within 100 MPC". Monthly Notices of the Royal Astronomical Society 494 (2): 1784. doi:10.1093/mnras/staa766. Bibcode: 2020MNRAS.494.1784A. 
  5. ↑ "NGC 3756". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+3756. 
  6. ↑ "LGG 250". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=LGG+250. 
  7. ↑ 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. 
  8. ↑ Wiid, P. (1976). "Supernova in NGC 3756". International Astronomical Union Circular (2895): 1. Bibcode: 1976IAUC.2895....1W. http://www.cbat.eps.harvard.edu/iauc/02800/02895.html#item1. 
  9. ↑ "SN 1975T". IAU. https://www.wis-tns.org/object/1975T. 
  10. ↑ Ciatti, F.; Rosino, L. (1978). "Observations of ten supernovae (1973 - 1977)". Astronomy and Astrophysics Supplement Series 34: 387. Bibcode: 1978A&AS...34..387C. 

Coordinates: Sky map 11h 36m 48.0146s, +54° 17′ 36.930″



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