Centaurus A/M83 Group
From Wikipedia, the free encyclopedia
| Observation data (Epoch ) |
|
|---|---|
| Constellation(s): | Hydra, Centaurus, & Virgo[2] |
| Right ascension: | 13h 20m[1] |
| Declination: | -44° 58′[1] |
| Number of galaxies: | 44[3] |
| Brightest member: | Centaurus A[3] |
| Other designations | |
| NGC 5128 Group,[1] Centaurus A Group,[1] LGG 344[1] | |
| See also: Galaxy groups and clusters, List of galaxy clusters |
|
The Centaurus A/M83 Group is a complex group of galaxies in the constellations Hydra, Centaurus, and Virgo. The group may be roughly divided into two subgroups. The Cen A Subgroup, at a distance of 11.9 Mly (3.66 Mpc), is centered around Centaurus A, a nearby radio galaxy.[3] The M83 Subgroup, at a distance of 14.9 Mly (4.56 Mpc), is centered around the Messier 83 (M83), a face-on spiral galaxy.[3]
This group is sometimes identified as one group[4][5] and sometimes identified as two groups.[6] Hence, some references will refer to two objects named the Centaurus A Group and the M83 Group. 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.[3]
[edit] Members
The table below lists galaxies that have been identified as associated with the Centaurus A/M83 Group by I. D. Karachentsev and collaborators.[7][3] Note that Karachentsev divides this group into two subgroups centered around Centaurus A and Messier 83.
| Name | Type[1] | R.A. (J2000)[1] | Dec. (J2000)[1] | Redshift (km/s)[1] | Apparent Magnitude[1] |
|---|---|---|---|---|---|
| Cen 7 | Sph | 13h 11m 13.8s | -38° 53′ 56″ | 17.3 | |
| Cen N | 13h 48m 09.1s | -47° 33′ 54″ | 17.5 | ||
| Centaurus A (NGC 5128) | S0 pec | 13h 25m 27.6s | -43° 01′ 09″ | 547 ± 5 | 7.8 |
| Centaurus A-dE1 | dSph | 13h 12m 45.2s | -41° 49′ 57″ | 19.3 | |
| Centaurus A-dE3 | dE | 13h 46m 00.8s | -36° 19′ 44″ | 17.1 | |
| HIPASS J1337-39 | Im | 13h 37m 25.3s | -39° 53′ 48″ | 492 ± 4 | 16.5 |
| HIPASS J1348-37 | 13h 48m 47.0s | -37° 58′ 29″ | 581 ± 8 | 16.9 | |
| HIPASS J1351-47 | 13h 51m 12.0s | -46° 58′ 12.9″ | 529 ± 6 | ||
| KKs 51 | E/Sph | 12h 44m 21.5s | -42° 56′ 23″ | 16.7 | |
| KKs 55 | Sph | 13h 22m 12.8s | -42° 43′ 41″ | 18.5 | |
| KKs 57 | Sph | 13h 41m 38.1s | -42° 34′ 55″ | 18.1 | |
| LEDA 166152 | dI | 13h 05m 02.1s | -40° 04′ 58″ | 617 ± 4 | 16.3 |
| LEDA 166167 | dI/dSph | 13h 27m 27.8s | -45° 21′ 10″ | 18 | |
| LEDA 166172 | dSph | 13h 43m 36.0s | -43° 46′ 11″ | 18.5 | |
| LEDA 166175 | dSph | 13h 46m 16.8s | -45° 41′ 05″ | 19.2 | |
| LEDA 166179 | dSph | 13h 48m 46.4s | -46° 59′ 46″ | 18 | |
| NGC 4945 | SB(s)cd | 13h 05m 27.5s | -49° 28′ 06″ | 563 ± 3 | 9.3 |
| NGC 5102 | SA0 | 13h 21m 57.6s | -36° 37′ 49″ | 468 ± 2 | 10.4 |
| NGC 5206 | SB(r)0 | 13h 33m 44.0s | -48° 09′ 04″ | 571 ± 10 | 11.6 |
| NGC 5237 | I0 | 13h 37m 39.0s | -42° 50′ 49″ | 361 ± 4 | 13.2 |
| PGC 45104 | IABm | 13h 03m 33.6s | -46° 35′ 06″ | ||
| PGC 45717 | I0 pec | 13h 10m 32.9s | -46° 59′ 27.3″ | 1853 ± 32 | 13.3 |
| PGC 45916 | dE | 13h 13m 09.1s | -44° 53′ 24″ | 784 ± 31 | 14.1 |
| PGC 46663 | IBm | 13h 21m 47.4s | -45° 03′ 42″ | 741 | 16.1 |
| PGC 46680 | Im | 13h 22m 02.0s | 32° 07′ | 16.6 | |
| PGC 47171 | IABm | 13h 27m 37.4s | -41° 28′ 50″ | 516 ± 3 | 12.9 |
| PGC 48515 | dE | 13h 42m 05.6s | -45° 12′ 18″ | 17.6 | |
| PGC 48738 | IB(s)m | 13h 45m 00.5s | -41° 51′ 40″ | 545 ± 2 | 14.0 |
| PGC 49615 | dS0/Im | 13h 57m 01.4s | -35° 19′ 59″ | 561 ± 32 | 14.8 |
| Name | Type[1] | R.A. (J2000)[1] | Dec. (J2000)[1] | Redshift (km/s)[1] | Apparent Magnitude[1] |
|---|---|---|---|---|---|
| AM 1321-304 | dIm | 13h 24m 36.2s | -30° 58′ 19″ | 487 ± 1 | 16.7 |
| Centaurus A-dE2 | dE/Im | 13h 21m 32.4s | -31° 53′ 11″ | 17.6 | |
| Centaurus A-dE4 | dSph | 13h 46m 40.4s | -29° 58′ 41″ | 19. | |
| HIDEEP J1336-3321 | 13h 36m 56.1s | -33° 21′ 23″ | 591 | 17.3 | |
| IC 4247 | S | 13h 26m 44.4s | -30° 21′ 45″ | 274 ± 65 | 14.4 |
| IC 4316 | IBm pec | 13h 40m 18.4s | -28° 53′ 32″ | 674 ± 53 | 15.0 |
| KK 208 | dI | 13h 36m 35.5s | -29° 34′ 17″ | 381 | 14.3 |
| LEDA 166163 | dI | 13h 21m 08.2s | -31° 31′ 45″ | 571 ± 3 | 17.1 |
| LEDA 166164 | dSph | 13h 22m 56.2s | -33° 34′ 22″ | 17.6 | |
| M83 | SAB(s)c | 13h 37m 00.9s | -29° 51′ 57″ | 513 ± 2 | 8.2 |
| NGC 5253 | Im pec | 13h 39m 55.9s | -31° 38′ 24″ | 407 ± 3 | 10.9 |
| NGC 5264 | IB(s)m | 13h 41m 36.7s | -29° 54′ 47″ | 478 ± 3 | 12.6 |
| PGC 47885 | 13h 35m 08.1s | -30° 07′ 03″ | 13848 | 15.8 | |
| PGC 48111 | Im | 13h 37m 20.0s | -28° 02′ 42″ | 587 ± 3 | 15.0 |
| UGCA 365 | Im | 13h 36m 31.1s | -29° 14′ 06″ | 573 ± 1 | 15.4 |
Additionally, ESO 219-010, PGC 39032, and PGC 51659 are listed as possibly being members of the Centaurus A Subgroup, and ESO 381-018, NGC 5408, and PGC 43048 are listed as possibly being members of the M83 Subgroup.[3] HIPASS J1337-39 is listed as a member of the Centaurus A Subgroup in earlier surveys by Karachentsev and collaborators[7] but is listed as a possible member of the M83 Subgroup in later study.[3]
[edit] References
- ^ a b c d e f g h i j k l m n o p NASA/IPAC Extragalactic Database. Results for NGC 5128 Group. Retrieved on 2006-11-22.
- ^ Kepple, George Robert; Glen W. Sanner (1998). The Night Sky Observer's Guide, Volume 2. Willmann-Bell, Inc., 73. ISBN 0-943396-60-3.
- ^ a b c d e f g h I. D. Karachentsev (2005). "The Local Group and Other Neighboring Galaxy Groups". Astronomical Journal 129: 178-188.
- ^ R. B. Tully (1988). Nearby Galaxies Catalog. Cambridge: Cambridge University Press. ISBN 0-521-35299-1.
- ^ P. Fouque, E. Gourgoulhon, P. Chamaraux, G. Paturel (1992). "Groups of galaxies within 80 Mpc. II - The catalogue of groups and group members". Astronomy and Astrophysics Supplement 93: 211-233.
- ^ A. Garcia (1993). "General study of group membership. II - Determination of nearby groups". Astronomy and Astrophysics Supplement 100: 47-90.
- ^ a b I. D. Karachentsev, M. E. Sharina, A. E. Dolphin, E. K. Grebel, D. Geisler, P. Guhathakurta, P. W. Hodge, V. E. Karachetseva, A. Sarajedini, P. Seitzer (2002). "New distances to galaxies in the Centaurus A group". Astronomy and Astrophysics 385: 21-31.
