Astronomy:NGC 3780

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NGC 3780
NGC 3780 imaged by SDSS
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension 11h 39m 22.3603s[1]
Declination+56° 16′ 14.452″[1]
Redshift0.007976±0.00000667[1]
Helio radial velocity2,391±2 km/s[1]
Distance109.65 ± 9.10 Mly (33.620 ± 2.789 Mpc)[1]
Group or clusterNGC 3780 group (LGG 247)
Apparent magnitude (V)12.16[1]
Characteristics
TypeSA(s)c[1]
Size~98,900 ly (30.32 kpc) (estimated)[1]
Apparent size (V)3.1′ × 2.5′[1]
Other designations
IRAS 11366+5632, UGC 6615, MCG+09-19-150, PGC 36138[1]

NGC 3780 is a spiral galaxy in the constellation of Ursa Major. Its velocity with respect to the cosmic microwave background is 2,557±12 km/s, which corresponds to a Hubble distance of 123.0 ± 8.6 Mly (37.71 ± 2.65 Mpc).[1] However, 10 non-redshift measurements give a closer mean distance of 109.65 ± 9.10 Mly (33.620 ± 2.789 Mpc).[2] It was discovered by German-British astronomer William Herschel on 14 April 1789.[3]

NGC 3780 is a is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[4] It also has an active galaxy 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]

NGC 3780 group

According to A. M. Garcia, NGC 3780 is the namesake of a small group of galaxies. The NGC 3780 group (also known as LGG 247) includes at least four galaxies, including NGC 3888, UGC 6596, and UGC 6774.[5]

Supernovae

Three supernovae have been observed in NGC 3780:

  • SN 1978H (Type II, mag. 16.5) was discovered by Swiss astronomer Paul Wild on 7 November 1978.[6][7][8]
  • SN 1992bt (Type II, mag. 16) was discovered by the Leuschner Observatory Supernova Search on 19 December 1992.[9][10][11]
  • SN 2024btj (Type II, mag. 18.53) was discovered by the Xingming Observatory Sky Survey (XOSS) on 5 February 2024.[12][13]

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 3780". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+3780. 
  2. ↑ "Distance Results for NGC 3780". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+3780. 
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 3780". https://cseligman.com/text/atlas/ngc37a.htm#3780. 
  4. ↑ 4.0 4.1 "NGC 3780". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+3780. 
  5. ↑ 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. 
  6. ↑ Wild, P. (1978). "Probable Supernova in NGC 3780". International Astronomical Union Circular (3303): 1. Bibcode: 1978IAUC.3303....1W. http://www.cbat.eps.harvard.edu/iauc/03300/03303.html#item1. 
  7. ↑ Kirshner, R. P.; Blair, W. P.; Simkin, S. M.; Sadler, E. (1978). "Supernovae". International Astronomical Union Circular (3316): 1. Bibcode: 1978IAUC.3316....1K. http://www.cbat.eps.harvard.edu/iauc/03300/03316.html#Item1. 
  8. ↑ "SN 1978H". IAU. https://www.wis-tns.org/object/1978H. 
  9. ↑ Treffers, R. R.; Leibundgut, B.; Filippenko, A. V.; Richmond, M. W. (1993). "Supernova 1992bt in NGC 3780". International Astronomical Union Circular (5841): 2. Bibcode: 1993IAUC.5841....2T. http://www.cbat.eps.harvard.edu/iauc/05800/05841.html#item2. 
  10. ↑ Filippenko, A. V.; Matheson, T.; Leibundgut, B. (1993). "Supernova 1992bt in NGC 3780". International Astronomical Union Circular (5844): 1. Bibcode: 1993IAUC.5844....1F. http://www.cbat.eps.harvard.edu/iauc/05800/05844.html#Item1. 
  11. ↑ "SN 1992bt". IAU. https://www.wis-tns.org/object/1992bt. 
  12. ↑ "SN 2024btj". IAU. https://www.wis-tns.org/object/2024btj. 
  13. ↑ Dyer, M. J. et al. (2024). "GOTO Transient Classification Report for 2024-02-07". Transient Name Server Classification Report 2024-371: 1. Bibcode: 2024TNSCR.371....1D. https://www.wis-tns.org/object/2024btj/classification-cert. 

Coordinates: Sky map 11h 39m 22.3603s, +56° 16′ 14.452″



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