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半人馬座 A/M83星系團

半人馬座 A/M83集團
觀測數據(曆元
星座長蛇座半人馬座室女座[1]
赤经13h 20m[2]
赤纬-44° 58′ ″[2]
最亮的成員半人馬座 A[3]
星系的數量44[3]
其它名稱
NGC 5128 Group,[2]、半人馬座 A集團[2] 、LGG 344[2]
參見:星系群星系团星系團列表

半人馬座 A/M83集團是一個複雜的星系團,成員跨越長蛇座半人馬座室女座這三個星座。這個集團可以粗略的分為二個子集團:半人馬座 A星系團M83星系團。半人馬座 A子星系團以半人馬座 A為中心,鄰近的一個電波星系,距離11,900萬光年(3,660萬秒差距[3];M83子星系團的距離為14,900萬光年(4,560萬秒差距),以M83,一個面對我們的螺旋星系,為中心[3]

這個星系團經常被視為一個整體[4][5],但有些時又被當成兩個集團[6]。因此,有些參考資料會有半人馬座 A星系團M83星系團兩個名稱。但是,環繞著半人馬座 A和M83的星系實際上是互相接近中的,而且這兩個子星系團之間看來並沒有相對的移動[3]

半人馬座 A/M83星系團是室女座超星系團的一部分,這是一個地區性的超星系團,而本星系群是遠離中心的一個成員。

成員

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確認的成員

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最明亮的一些成員在早期的星系團成員調查中就已經不斷的被確認了[4],但是有許多的矮星系在後續更多的密集觀測中才被辨認出來。在其中最早被辨認出來的145個暗弱的光學影像是來自UK史密特望遠鏡,並且使用派翠克電波望遠鏡探究這些天體的氫線,和使用賽丁泉2.3米望遠鏡探究譜線,才確認出其中20個矮星系是這個集團中的成員[7]依巴谷衛星巡天測量,以電波和氫光譜的輻射線,發現5個不在目錄上的星系也是這個集團的成員,也辨認出5個早先在目錄中已有的星系也是集團中的成員[8]。在HIDEEP的巡天,這是一次使用氫的輻射線在這個小區域內進行的更為密集的搜尋,又變認出一個矮星系的成員[9]。幾次的光學巡天又變認出了超過20個的成員候選者[10][11][12]

成員列表

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下面的表中所列出的半人馬座 A/M83集團的成員是由I. D. Karachentsev和 collaborators確認的.[12][3],注意Karachentsev將這個星系團分為圍繞著半人馬座 AM83的兩個子星系團。

半人馬座 A的子星系團
名稱 類型[2] 赤經 (J2000)[2] 赤緯 (J2000)[2] 紅移 (公里/秒)[2] 視星等[2][13][14][15]
Cen 7 Sph 13h 11m 13.8s -38° 53′ 56″ 17.3
Cen N 13h 48m 09.1s -47° 33′ 54″ 17.5
半人馬座 A (NGC 5128) S0 pec 13h 25m 27.6s -43° 01′ 09″ 547 ± 5 6.84
半人馬座 A-dE1 dSph 13h 12m 45.2s -41° 49′ 57″ 19.3
半人馬座 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 8.4
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
M83子星系團的成員
名稱 類型[2] 赤經 (J2000)[2] 赤緯 (J2000)[2] 紅移 (公里/秒)[2] 視星等[2]
AM 1321-304 dIm 13h 24m 36.2s -30° 58′ 19″ 487 ± 1 16.7
半人馬座 A-dE2 dE/Im 13h 21m 32.4s -31° 53′ 11″ 17.6
半人馬座 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

此外,ESO 219-010、PGC 39032和PGC 51659可能是半人馬座 A子集團的成員;ESO 381-018、NGC 5408和PGC 43048可能是M83子集團的成員[3]。雖然HIPASS J1337-39在Karachentsev最新出版的名單中只被列為M83子集團可能的成員[3],稍後的分系已確認它是這個子集團的一員[16]

參考資料

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  1. ^ Kepple, George Robert; Glen W. Sanner. The Night Sky Observer's Guide, Volume 2. Willmann-Bell, Inc. 1998: 73. ISBN 0-943396-60-3. 
  2. ^ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 NASA/IPAC Extragalactic Database. Results for NGC 5128 Group. [2006-11-22]. (原始内容存档于2008-12-16). 
  3. ^ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 I. D. Karachentsev. The Local Group and Other Neighboring Galaxy Groups. Astronomical Journal. 2005, 129: 178–188 [2009-05-19]. doi:10.1086/426368. (原始内容存档于2008-02-21). 
  4. ^ 4.0 4.1 R. B. Tully. Nearby Galaxies Catalog. Cambridge: Cambridge University Press. 1988. ISBN 0-521-35299-1. 
  5. ^ P. Fouque, E. Gourgoulhon, P. Chamaraux, G. Paturel. Groups of galaxies within 80 Mpc. II - The catalogue of groups and group members. Astronomy and Astrophysics Supplement. 1992, 93: 211–233 [2020-10-02]. (原始内容存档于2019-12-13). 
  6. ^ A. Garcia. General study of group membership. II - Determination of nearby groups. Astronomy and Astrophysics Supplement. 1993, 100: 47–90 [2020-10-02]. (原始内容存档于2019-12-13). 
  7. ^ S. Cote, K. C. Freeman, C. Carigan, P. J. Quinn. Discovery of Numerous Dwarf Galaxies in the Two Nearest Groups of Galaxies. Astronomical Journal. 1997, 114: 1313 [2009-05-19]. doi:10.1086/118565. (原始内容存档于2018-11-22). 
  8. ^ G. D. Banks, M. J. Disney, P. M. Knezek, H. Jerjen, D. G. Barnes, R. Bhatal, W. J. G. de Blok, P. J. Boyce, R. D. Ekers, K. C. Freeman, B. K. Gibson, P. A. Henning, V. Kilborn, B. Koribalski, R. C. Kraan-Korteweg, D. F. Malin, R. F. Minchin, J. R. Mould, T. Oosterloo, R. M. Price, M. E. Putman, S. D. Ryder, E. M. Sadler, L. Staveley-Smith, I. Stewart, F. Stootman, R. A. Vaile, R. L. Webster, A. E. Wright. New Galaxies Discovered in the First Blind H I Survey of the Centaurus A Group. Astrophysical Journal. 1999, 524: 612–622 [2009-05-19]. doi:10.1086/307854. (原始内容存档于2016-01-20). 
  9. ^ R. F. Minchin, M. J. Disney, P. J. Boyce, W. J. G. de Blok, Q. A. Parker, G. D. Banks, K. C. Freeman, D. A. Garcia, B. K. Gibson, M. Grossi, R. F. Haynes, P. M. Knezek, R. H. Lang, D. F. Malin, R. M. Price, I. M. Stewart, A. E. Wright. HIDEEP - an extragalactic blind survey for very low column-density neutral hydrogen. Monthly Notices of the Royal Astronomical Society. 2003, 346: 787–802 [2009-05-19]. doi:10.1111/j.1365-2966.2003.07134.x. (原始内容存档于2018-11-22). 
  10. ^ H. Jerjen, K. C. Freeman, B. Binggeli. Testing the Surface Brightness Fluctuations Method for Dwarf Elliptical Galaxies in the Centaurus A Group. Astronomical Journal. 2000, 119: 166–176 [2009-05-19]. doi:10.1086/301188. (原始内容存档于2018-11-22). 
  11. ^ H. Jerjen, K. C. Freeman, B. Binggeli. Surface BR Photometry of Newly Discovered Dwarf Elliptical Galaxies in the Nearby Sculptor and Centaurus A Groups. Astronomical Society. 2000, 119: 593–608 [2009-05-19]. doi:10.1086/301216. (原始内容存档于2018-11-22). 
  12. ^ 12.0 12.1 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. New distances to galaxies in the Centaurus A group. Astronomy and Astrophysics. 2002, 385: 21–31 [2020-10-02]. doi:10.1051/0004-6361:20020042. (原始内容存档于2018-11-22). 
  13. ^ [ NAME Centaurus A] 请检查|url=值 (帮助). SIMBAD. 斯特拉斯堡天文資料中心. 
  14. ^ Armando, Gil de Paz; Boissier; Madore; Seibert; Boselli; et al. The GALEX Ultraviolet Atlas of Nearby Galaxies. Astrophysical Journal Supplement. 2007, 173 (2): 185–255. Bibcode:2007ApJS..173..185G. S2CID 119085482. arXiv:astro-ph/0606440可免费查阅. doi:10.1086/516636. 
  15. ^ Les données de «Revised NGC and IC Catalog by Wolfgang Steinicke» sur le site ProfWeb, NGC 4900 à 4999 (法语). 
  16. ^ M. Grossi, M. J. Disney, B. J. Pritzl, P. M. Knezek, J. S. Gallagher, R. F. Minchin, K. C> Freeman. Star formation history and evolution of gas-rich dwarf galaxies in the Centaurus A group. Monthly Notices of the Royal Astronomical Society. 2006, 374: 107–130 [2009-05-19]. doi:10.1111/j.1365-2966.2006.11125.x. (原始内容存档于2020-07-22). 
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半人馬座 A/M83星系團
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