NGC 3754 is a small barred spiral galaxy[1] located in 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". atlas.obs-hp.fr. Retrieved 2024-05-02.
  2. ^ Astronomy, Go. "NGC 3754 | galaxy in Leo | NGC List | GO ASTRONOMY". Go-Astronomy.com. Retrieved 2024-05-02.
  3. ^ a b "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-05-02.
  4. ^ "New General Catalog Objects: NGC 3750 - 3799". cseligman.com. Retrieved 2024-05-02.
  5. ^ "NGC 3754 - LINER-type Active Galaxy Nucleus". simbad.u-strasbg.fr. Retrieved 2024-05-02.
  6. ^ Bakich, Michael E. (2024-01-01). "Copeland's Septet". Astronomy Magazine. Retrieved 2024-05-02.
  7. ^ "Copeland's Septet (Hickson Compact Group 57) – Constellation Guide". www.constellation-guide.com. Retrieved 2024-05-02.
  8. ^ "NED Search Results for ARP 320". ned.ipac.caltech.edu. Retrieved 2024-05-02.
  9. ^ "Copeland's Septet (Arp 320) - Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets, Telescopes". cs.astronomy.com. Retrieved 2024-05-02.
  10. ^ Hickson, P. (1982-04-01). "Systematic properties of compact groups of galaxies". The Astrophysical Journal. 255: 382–391. Bibcode:1982ApJ...255..382H. doi:10.1086/159838. ISSN 0004-637X.
  11. ^ "Data for revised NGC and IC catalogue by Wolfgang Steinicke - NGC 3700 to 3799". astrovalleyfield.ca. Retrieved 2024-05-02.
Allikas: https://en.wikipedia.org/wiki/NGC_3754
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