Astronomy:NGC 3754

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NGC 3754
NGC 3754
Observation data (J2000 epoch)
ConstellationLeo
Right ascension11h 37m 54.921s
Declination+21d 59m 07.80s
Redshift0.029952
Helio radial velocity8,979 km/s
Distance447 Mly (137 Mpc)
Group or clusterCopeland Septet
Apparent magnitude (V)14.3
Characteristics
TypeSBc
Size58,000 ly
Other designations
PGC 36018, CGCG 127-012N, MCG +04-28-011, VV 282b, Copeland Septet NED07, 2MASS J1137549+2159080, SDSS J113754.92+215907.8, HCG 057D, NSA 112842, AGC 210537, NVSS J113754+215910, 2XMM J113755.0+215908, LEDA 36018

NGC 3754 is a small barred spiral galaxy[1] located in the constellation Leo.[2] It is located 447 million light-years away from the Solar System[3] and was discovered on April 5, 1874, by Ralph Copeland.[4]

The luminosity class of NGC 3754 is II[3] and it is listed as a LINER galaxy by SIMBAD, meaning, a nucleus presenting an emission spectrum characterized by broad lines of weak ionized atoms.[5]

Copeland Septet

Sloan Digital Sky Survey image of NGC 3754 above two members of the Copeland Septet

NGC 3754 is a member of the Copeland Septet which is made up of 7 galaxies discovered by Copeland in 1874.[6] The other members of the group, are NGC 3745, NGC 3746, NGC 3748, NGC 3750, NGC 3751 and NGC 3753.[7]

Halton Arp noticed the 7 galaxies in an article published in 1966.[8] This group is designated as Arp 320 in which PGC 36010 is part of them.[9]

The 7 galaxies were also observed by Paul Hickson, in which he included them inside his article in 1982.[10] This group is known as Hickson 57, in which NGC 3754 is designated as HCG 57D.[11]

References

  1. ↑ "HyperLeda -object description". http://atlas.obs-hp.fr/hyperleda/ledacat.cgi?o=NGC%203754. 
  2. ↑ Astronomy, Go. "NGC 3754 | galaxy in Leo | NGC List | GO ASTRONOMY" (in en-US). https://www.go-astronomy.com/ngc.php?ID=3982. 
  3. ↑ 3.0 3.1 "Your NED Search Results". https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=56901&objname=1&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1. 
  4. ↑ "New General Catalog Objects: NGC 3750 - 3799". https://cseligman.com/text/atlas/ngc37a.htm#3754. 
  5. ↑ "NGC 3754 - LINER-type Active Galaxy Nucleus". https://simbad.u-strasbg.fr/simbad/sim-basic. 
  6. ↑ Bakich, Michael E. (2024-01-01). "Copeland's Septet" (in en-US). https://www.astronomy.com/science/copelands-septet/. 
  7. ↑ "Copeland's Septet (Hickson Compact Group 57) – Constellation Guide". https://www.constellation-guide.com/copelands-septet/. 
  8. ↑ "NED Search Results for ARP 320". https://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=Arp+320&extend=yes&out_csys=Equatorial&out_equinox=B1950.0&obj_sort=RA+or+Longitude&zv=z&zv_breaker=10000.0. 
  9. ↑ "Copeland's Septet (Arp 320) - Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets, Telescopes". https://cs.astronomy.com/asy/m/galaxies/492462.aspx. 
  10. ↑ Hickson, P. (1982-04-01). "Systematic properties of compact groups of galaxies.". The Astrophysical Journal 255: 382–391. doi:10.1086/159838. ISSN 0004-637X. Bibcode: 1982ApJ...255..382H. https://ui.adsabs.harvard.edu/abs/1982ApJ...255..382H. 
  11. ↑ "Data for revised NGC and IC catalogue by Wolfgang Steinicke - NGC 3700 to 3799". http://astrovalleyfield.ca/AstronomieCompl/NGC%20et%20autres/WolfgangS/N3700_exc_web.htm. 



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