M83 group

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The location of the M83 group within the neighborhood of the local group

The M83 group is one of the local group neighboring galaxy group , which extends over the constellations water serpent (Hydra), Centaur and the southern part of Virgo . The group is divided into two subgroups: the NGC-5128 subgroup , which is 12 million light years (3.7 Mpc ) away and at the center of which is the radio galaxy Centaurus A (NGC 5128), and the M83 subgroup , which is about 15 million light years (4.6 Mpc) away and groups around the southern pinwheel galaxy M83 .

Some sources list both subgroups as a common group, while others describe both as separate galaxy groups, so that the NGC-5128 group and the M83 group are referred to. The almost seamless transition from one to the other subgroup and the almost vanishing relative movement of the two parts to one another justify the description as a single group. The M83 group resembles our local group in this capacity, which is also divided into two large dynamic subgroups. The distance between the two main galaxies M83 and NGC 5128 is, however, about 4.5 million light years larger than the distance between the Andromeda Galaxy and the Milky Way . The masses of the two subgroups were estimated using the virial theorem to be 1.1 × 10 12 M ☉ (M83) and 4.9 × 10 12 M ☉ (NGC 5128). The total mass of the group is about 6 × 10 12 M ☉ about three times as large as the mass of the local group.

Members of the M83 group

The spiral galaxy Messier 83 is the second largest and eponymous member of the M83 group

Identification of the members

The brightest group members were identified in early galaxy surveys. However, many dwarf galaxies could only be assigned to the group through modern, intensive studies. One of the first of these investigations with the UKST at the Anglo-Australian Observatory detected 145 faint objects in the images, which were then both in the 21 cm line (with the Parkes radio telescope ) and in the H-alpha light with the Siding-Spring- 2.3 m telescope from the Australian National University . In the end, 20 dwarf galaxies were identified as members of the group. The HIPASS survey identified five other already cataloged galaxies as members. Another dwarf galaxy was found as part of the HIDEEP survey, and 20 other candidates were found through a variety of other investigations.

Member lists

The following two tables list the members of the two subgroups of the M83 group identified by ID Karachentsev et al. were specified.

Members of the NGC-5128 subgroup
designation Type Right ascension
J2000.0 		Declination
J2000.0 		v R
( km / s ) 		m B
Cen 7 Sph 13 h 11 m 13.8 s 1614644−38 ° 53 ′ 56 ″ 17.3
Cen N 13 h 48 m 09.1 s 1526646−47 ° 33 ′ 54 ″ 17.5
Centaurus A (NGC 5128) S0 pec 13 h 25 m 27.6 s 1569891−43 ° 01 ′ 09 ″ 547 ± 5 7.8
Centaurus A-dE1 dSph 13 h 12 m 45.2 s 1585043−41 ° 49 ′ 57 ″ 19.3
Centaurus A-dE3 dE 13 h 46 m 00.8 s 1638056−36 ° 19 ′ 44 ″ 17.1
HIPASS J1337-39 in the 13 h 37 m 25.3 s 1604652−39 ° 53 ′ 48 ″ 492 ± 4 16.5
HIPASS J1348-37 13 h 48 m 47.0 s 1624171−37 ° 58 ′ 29 ″ 581 ± 8 16.9
HIPASS J1351-47 13 h 51 m 12.0 s 1534187.1−46 ° 58 ′ 12.9 ″ 529 ± 6
KKs 51 E / Sph 12 h 44 m 21.5 s 1574377−42 ° 56 ′ 23 ″ 16.7
KKs 55 Sph 13 h 22 m 12.8 s 1575659−42 ° 43 ′ 41 ″ 18.5
KKs 57 Sph 13 h 41 m 38.1 s 1576545−42 ° 34 ′ 55 ″ 18.1
LEDA 166152 dI 13 h 05 m 02.1 s 1599542−40 ° 04 ′ 58 ″ 617 ± 4 16.3
LEDA 166167 dI / dSph 13 h 27 m 27.8 s 1547890−45 ° 21 ′ 10 ″ 18th
LEDA 166172 dSph 13 h 43 m 36.0 s 1565389−43 ° 46 ′ 11 ″ 18.5
LEDA 166175 dSph 13 h 46 m 16.8 s 1545895−45 ° 41 ′ 05 ″ 19.2
LEDA 166179 dSph 13 h 48 m 46.4 s 1534054−46 ° 59 ′ 46 ″ 18th
NGC 4945 SB (s) cd 13 h 05 m 27.5 s 1507194−49 ° 28 ′ 06 ″ 563 ± 3 9.3
NGC 5102 SA0 13 h 21 m 57.6 s 1636251−36 ° 37 ′ 49 ″ 468 ± 2 10.4
NGC 5206 SB (r) 0 13 h 33 m 44.0 s 1519096−48 ° 09 ′ 04 ″ 571 ± 10 11.6
NGC 5237 I0 13 h 37 m 39.0 s 1574951−42 ° 50 ′ 49 ″ 361 ± 4 13.2
PGC 45104 IABm 13 h 03 m 33.6 s 1536494−46 ° 35 ′ 06 ″
PGC 45717 I0 pec 13 h 10 m 32.9 s 1534072.7−46 ° 59 ′ 27.3 ″ 1853 ± 32 13.3
PGC 45916 dE 13 h 13 m 09.1 s 1554676−44 ° 53 ′ 24 ″ 784 ± 31 14.1
PGC 46663 IBm 13 h 21 m 47.4 s 1549658−45 ° 03 ′ 42 ″ 741 16.1
PGC 46680 in the 13 h 22 m 02.0 s 2320700+ 32 ° 07 ′ 0 ″ 16.6
PGC 47171 IABm 13 h 27 m 37.4 s 1587150−41 ° 28 ′ 50 ″ 516 ± 3 12.9
PGC 48515 dE 13 h 42 m 05.6 s 1548782−45 ° 12 ′ 18 ″ 17.6
PGC 48738 IB (s) m 13 h 45 m 00.5 s 1584860−41 ° 51 ′ 40 ″ 545 ± 2 14.0
PGC 49615 dS0 / Im 13 h 57 m 01.4 s 1648041−35 ° 19 ′ 59 ″ 561 ± 32 14.8
Members of the M83 subgroup
designation Type Right ascension
J2000.0 		Declination
J2000.0 		v R
( km / s ) 		m B
AM 1321-304 dIm 13 h 24 m 36.2 s 1694181−30 ° 58 ′ 19 ″ 487 ± 1 16.7
Centaurus A-dE2 dE / Im 13 h 21 m 32.4 s 1684689−31 ° 53 ′ 11 ″ 17.6
Centaurus A-dE4 dSph 13 h 46 m 40.4 s 1704159−29 ° 58 ′ 41 ″ 19,
HIDEEP J1336-3321 13 h 36 m 56.1 s 1667877−33 ° 21 ′ 23 ″ 591 17.3
IC 4247 S. 13 h 26 m 44.4 s 1697855−30 ° 21 ′ 45 ″ 274 ± 65 14.4
IC 4316 IBm pec 13 h 40 m 18.4 s 1714668−28 ° 53 ′ 32 ″ 674 ± 53 15.0
KK 208 dI 13 h 36 m 35.5 s 1706583−29 ° 34 ′ 17 ″ 381 14.3
LEDA 166163 dI 13 h 21 m 08.2 s 1686855−31 ° 31 ′ 45 ″ 571 ± 3 17.1
LEDA 166164 dSph 13 h 22 m 56.2 s 1666578−33 ° 34 ′ 22 ″ 17.6
M83 SAB (s) c 13 h 37 m 00.9 s 1704843−29 ° 51 ′ 57 ″ 513 ± 2 8.2
NGC 5253 In the pec 13 h 39 m 55.9 s 1686176−31 ° 38 ′ 24 ″ 407 ± 3 10.9
NGC 5264 IB (s) m 13 h 41 m 36.7 s 1704553−29 ° 54 ′ 47 ″ 478 ± 3 12.6
PGC 47885 13 h 35 m 08.1 s 1699297−30 ° 07 ′ 03 ″ 13848 15.8
PGC 48111 in the 13 h 37 m 20.0 s 1719758−28 ° 02 ′ 42 ″ 587 ± 3 15.0
UGCA 365 in the 13 h 36 m 31.1 s 1708594−29 ° 14 ′ 06 ″ 573 ± 1 15.4

Furthermore, ESO 219-010 , PGC 39032 and PGC 51659 are listed as possible members of the NGC-5128 subgroup, ESO 381-018 , NGC 5408 and PGC 43048 as possible members of the M83 subgroup. Although HIPASS J1337-39 is only listed as a possible member of the M83 subgroup, recent research has strongly substantiated this assumption.

See also

Individual evidence

  1. ^ A b c d e f I. D. Karachentsev: The Local Group and Other Neighboring Galaxy Groups . In: Astronomical Journal . 129, 2005, pp. 178-188. bibcode : 2005AJ .... 129..178K .
  2. ↑ a b R. B. Tully: Nearby Galaxies Catalog . Cambridge University Press, Cambridge 1988, ISBN 0-521-35299-1 .
  3. ^ A b P. Fouque, E. Gourgoulhon, P. Chamaraux, G. Paturel: Groups of galaxies within 80 Mpc. II - The catalog of groups and group members . In: Astronomy and Astrophysics Supplement . 93, 1992, pp. 211-233. bibcode : 1992A & AS ... 93..211F .
  4. ^ A. Garcia: General study of group membership. II - Determination of nearby groups . In: Astronomy and Astrophysics Supplement . 100, 1993, pp. 47-90. bibcode : 1993A & AS..100 ... 47G .
  5. ^ S. Cote, KC Freeman, C. Carigan, PJ Quinn: Discovery of Numerous Dwarf Galaxies in the Two Nearest Groups of Galaxies . In: Astronomical Journal . 114, 1997, p. 1313. bibcode : 1997AJ .... 114.1313C .
  6. ^ GD Banks et al .: New Galaxies Discovered in the First Blind HI Survey of the Centaurus A Group . In: Astrophysical Journal . 524, 1999, pp. 612-622. bibcode : 1999ApJ ... 524..612B .
  7. ↑ RF Minchin, MJ Disney, PJ Boyce, WJG de Blok, QA Parker, GD Banks, KC Freeman, DA Garcia, BK Gibson, M. Grossi, RF Haynes, PM Knezek, RH Lang, DF Malin, RM Price, IM Stewart , AE Wright: HIDEEP - an extragalactic blind survey for very low column-density neutral hydrogen . In: Monthly Notices of the Royal Astronomical Society . 346, 2003, pp. 787-802. bibcode : 2003MNRAS.346..787M .
  8. ↑ H. Jerjen, KC Freeman, B. Binggeli: Testing the surface brightness fluctuation Method for Dwarf Elliptical Galaxies in the Centaurus A Group . In: Astronomical Journal . 119, 2000, pp. 166-176. bibcode : 2000AJ .... 119..166J .
  9. ↑ H. Jerjen, KC Freeman, B. Binggeli: Surface BR Photometry of Newly Discovered Dwarf Elliptical Galaxies in the Nearby Sculptor and Centaurus A Groups . In: Astronomical Society . 119, 2000, pp. 593-608. bibcode : 2000AJ .... 119..593J .
  10. ↑ a b I.D. Karachentsev, ME Sharina, AE Dolphin, EK Grebel, D. Geisler, P. Guhathakurta, PW Hodge, VE Karachetseva, A. Sarajedini, P. Seitzer: New distances to galaxies in the Centaurus A group . In: Astronomy and Astrophysics . 385, 2002, pp. 21-31. bibcode : 2002A & A ... 385 ... 21K .
  11. ↑ NASA / IPAC Extragalactic Database . In: Results for NGC 5128 Group . Retrieved November 22, 2006.
  12. ↑ NASA / IPAC Extragalactic Database . In: Results for M83 Group . Retrieved November 22, 2006.
  13. ^ Freeman-2006 "> M. Grossi, MJ Disney, BJ Pritzl, PM Knezek, JS Gallagher, RF Minchin, K. C> Freeman: Star formation history and evolution of gas-rich dwarf galaxies in the Centaurus A group . In: Monthly Notices of the Royal Astronomical Society . 374, 2006, pp. 107-130. Bibcode : 2007MNRAS.374..107G .