Editing Centaurus A (section)

==Nearby galaxies and galaxy group information==
Centaurus A is at the center of one of two subgroups within the [[Centaurus A/M83 Group]], a nearby [[Galaxy group|group of galaxies]].<ref name="karachentsevetal2002">{{cite journal
  | author=I. D. Karachentsev | display-authors=4 | author2=M. E. Sharina | author3=A. E. Dolphin | author4=E. K. Grebel | author5=D. Geisler | author6=P. Guhathakurta | author7=P. W. Hodge | author8=V. E. Karachetseva | author9=A. Sarajedini | author10=P. Seitzer
  | title=New distances to galaxies in the Centaurus A group
  | journal=Astronomy and Astrophysics
  | date=2002
  | volume=385
  | issue=1
  | pages=21–31
  | bibcode=2002A&A...385...21K  | doi=10.1051/0004-6361:20020042
| doi-access=free }}</ref> [[Messier 83]] (the Southern Pinwheel Galaxy) is at the center of the other subgroup.  These two groups are sometimes identified as one group<ref name="nbg">{{cite book
  | author=R. B. Tully
  | date=1988
  | title=Nearby Galaxies Catalog
  | publisher=Cambridge University Press
  | location=Cambridge
  | isbn=978-0-521-35299-4}}</ref><ref name="fouqueetal1992">{{cite journal
  | author=P. Fouque | author2=E. Gourgoulhon | author3=P. Chamaraux | author4=G. Paturel
  | title=Groups of galaxies within 80 Mpc. II – The catalogue of groups and group members
  | journal=Astronomy and Astrophysics Supplement
  | date=1992
  | volume=93
  | pages=211–233
  | bibcode=1992A&AS...93..211F
  }}</ref> and sometimes identified as two groups.<ref name="garcia1993">{{cite journal
  | author=A. Garcia
  | title=General study of group membership. II – Determination of nearby groups
  | journal=Astronomy and Astrophysics Supplement
  | date=1993
  | volume=100
  | pages=47–90
  | bibcode=1993A&AS..100...47G}}</ref> However, the galaxies around Centaurus A and the galaxies around M83 are physically close to each other, and both subgroups appear not to be moving relative to each other.<ref name="karachentsev2005">{{cite journal
  | author=I. D. Karachentsev
  | title=The Local Group and Other Neighboring Galaxy Groups
  | journal=Astronomical Journal
  | date=2005
  | volume=129
  | issue=1
  | pages=178–188
  | bibcode=2005AJ....129..178K  | doi=10.1086/426368
|arxiv = astro-ph/0410065 | s2cid=119385141
 }}</ref> The Centaurus A/M83 Group is located in the [[Virgo Supercluster]].{{cn|date=April 2021}}

In addition to dwarf galaxies, Centaurus A, like most galaxies, has a population of [[globular cluster]]s. Some objects that appear to be globular clusters are hypothesized to be the tidally stripped cores of former galaxies. The most extreme example is the object VHH81-01, whose central black hole is estimated to be around {{solar mass|{{val|8e5}}}}.<ref>{{cite journal|doi=10.3847/1538-4357/ac551c|title=A Population of Luminous Globular Clusters and Stripped Nuclei with Elevated Mass to Light Ratios around NGC 5128 |year=2022 |last1=Dumont |first1=Antoine |last2=Seth |first2=Anil C. |last3=Strader |first3=Jay |last4=Voggel |first4=Karina |last5=Sand |first5=David J. |last6=Hughes |first6=Allison K. |last7=Caldwell |first7=Nelson |last8=Crnojević |first8=Denija |last9=Mateo |first9=Mario |last10=Bailey |first10=John I. |last11=Forbes |first11=Duncan A. |journal=The Astrophysical Journal |volume=929 |issue=2 |page=147 |arxiv=2112.04504 |bibcode=2022ApJ...929..147D |s2cid=245005855 |doi-access=free }}</ref>