LEO V: A COMPANION OF A COMPANION OF THE MILKY WAY GALAXY?

被引：133
作者：
Belokurov, V. [1 ]
Walker, M. G. [1 ]
Evans, N. W. [1 ]
Faria, D. C. [1 ]
Gilmore, G. [1 ]
Irwin, M. J. [1 ]
Koposov, S. [2 ]
Mateo, M. [3 ]
Olszewski, E. [4 ]
Zucker, D. B. [1 ]
机构：
[1] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England
[2] Max Planck Inst Astron, D-69117 Heidelberg, Germany
[3] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA
[4] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA
来源：
ASTROPHYSICAL JOURNAL LETTERS | 2008年 / 686卷 / 02期
基金：
美国国家科学基金会; 美国国家航空航天局; 英国科学技术设施理事会;
关键词：
galaxies: dwarf; galaxies: individual (Leo); Local Group;
D O I：
10.1086/592962
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report the discovery of a new Milky Way satellite in the constellation Leo, identified in data from the Sloan Digital Sky Survey. It lies at a distance of similar to 180 kpc, and is separated by less than or similar to 3 degrees from another recent discovery, Leo IV. We present follow-up imaging from the Isaac Newton Telescope and spectroscopy from the Hectochelle fiber spectrograph at the Multiple Mirror Telescope. Leo V's heliocentric velocity is similar to 173.3 +/- 3.1 km s(-1), offset by similar to 40 km s(-1) from that of Leo IV. A simple interpretation of the kinematic data is that both objects may lie on the same stream, although the implied orbit is only modestly eccentric (e similar to 0.2)
引用
收藏
页码：L83 / L86
页数：4
相关论文
共 26 条
  • [1] The Fourth Data Release of the Sloan Digital Sky Survey
    Adelman-McCarthy, JK
    Agüeros, MA
    Allam, SS
    Anderson, KSJ
    Anderson, SF
    Annis, J
    Bahcall, NA
    Baldry, IK
    Barentine, JC
    Berlind, A
    Bernardi, M
    Blanton, MR
    Boroski, WN
    Brewington, HJ
    Brinchmann, J
    Brinkmann, J
    Brunner, RJ
    Budavári, T
    Carey, LN
    Carr, MA
    Castander, FJ
    Connolly, AJ
    Csabai, I
    Czarapata, PC
    Dalcanton, JJ
    Doi, M
    Dong, F
    Eisenstein, DJ
    Evans, ML
    Fan, XH
    Finkbeiner, DP
    Friedman, SD
    Frieman, JA
    Fukugita, M
    Gillespie, B
    Glazebrook, K
    Gray, J
    Grebel, EK
    Gunn, JE
    Gurbani, VK
    de Haas, E
    Hall, PB
    Harris, FH
    Harvanek, M
    Hawley, SL
    Hayes, J
    Hendry, JS
    Hennessy, GS
    Hindsley, RB
    Hirata, CM
    [J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2006, 162 (01) : 38 - 48
  • [2] Cats and dogs, hair and a hero: A quintet of new Milky Way companions
    Belokurov, V.
    Zucker, D. B.
    Evans, N. W.
    Kleyna, J. T.
    Koposov, S.
    Hodgkin, S. T.
    Irwin, M. J.
    Gilmore, G.
    Wilkinson, M. I.
    Fellhauer, M.
    Bramich, D. M.
    Hewett, P. C.
    Vidrih, S.
    De Jong, J. T. A.
    Smith, J. A.
    Rix, H. -W.
    Bell, E. F.
    Wyse, R. F. G.
    Newberg, H. J.
    Mayeur, P. A.
    Yanny, B.
    Rockosi, C. M.
    Gnedin, O. Y.
    Schneider, D. P.
    Beers, T. C.
    Barentine, J. C.
    Brewington, H.
    Brinkmann, J.
    Harvanek, M.
    Kleinman, S. J.
    Krzesinski, J.
    Long, D.
    Nitta, A.
    Snedden, S. A.
    [J]. ASTROPHYSICAL JOURNAL, 2007, 654 (02) : 897 - 906
  • [3] A faint new milky way satellite in Bootes
    Belokurov, V.
    Zucker, D. B.
    Evans, N. W.
    Wilkinson, M. I.
    Irwin, M. J.
    Hodgkin, S.
    Bramich, D. M.
    Irwin, J. M.
    Gilmore, G.
    Willman, B.
    Vidrih, S.
    Newberg, H. J.
    Wyse, R. F. G.
    Fellhauer, M.
    Hewett, P. C.
    Cole, N.
    Bell, E. F.
    Beers, T. C.
    Rockosi, C. M.
    Yanny, B.
    Grebel, E. K.
    Schneider, D. P.
    Lupton, R.
    Barentine, J. C.
    Brewington, H.
    Brinkmann, J.
    Harvanek, M.
    Kleinman, S. J.
    Krzesinski, J.
    Long, D.
    Nitta, A.
    Smith, J. A.
    Snedden, S. A.
    [J]. ASTROPHYSICAL JOURNAL, 2006, 647 (02) : L111 - L114
  • [4] CLEM JL, 2005, THESIS U VICTORIA
  • [5] Simple three-integral scale-free galaxy models
    Evans, NW
    Hafner, RM
    deZeeuw, PT
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1997, 286 (02) : 315 - 328
  • [6] The 2.5 m telescope of the Sloan Digital Sky Survey
    Gunn, JE
    Siegmund, WA
    Mannery, EJ
    Owen, RE
    Hull, CL
    Leger, RF
    Carey, LN
    Knapp, GR
    York, DG
    Boroski, WN
    Kent, SM
    Lupton, RH
    Rockosi, CM
    Evans, ML
    Waddell, P
    Anderson, JE
    Annis, J
    Barentine, JC
    Bartoszek, LM
    Bastian, S
    Bracker, SB
    Brewington, HJ
    Briegel, CI
    Brinkmann, J
    Brown, YJ
    Carr, MA
    Czarapata, PC
    Drennan, CC
    Dombeck, T
    Federwitz, GR
    Gillespie, BA
    Gonzales, C
    Hansen, SU
    Harvanek, M
    Hayes, J
    Jordan, W
    Kinney, E
    Klaene, M
    Kleinman, SJ
    Kron, RG
    Kresinski, J
    Lee, G
    Limmongkol, S
    Lindenmeyer, CW
    Long, DC
    Loomis, CL
    McGehee, PM
    Mantsch, PM
    Neilsen, EH
    Neswold, RM
    [J]. ASTRONOMICAL JOURNAL, 2006, 131 (04) : 2332 - 2359
  • [7] Population gradients in local group dwarf spheroidal galaxies
    Harbeck, D
    Grebel, EK
    Holtzman, J
    Guhathakurta, P
    Brandner, W
    Geisler, D
    Sarajedini, A
    Dolphin, A
    Hurley-Keller, D
    Mateo, M
    [J]. ASTRONOMICAL JOURNAL, 2001, 122 (06) : 3092 - 3105
  • [8] INT WFS pipeline processing
    Irwin, M
    Lewis, J
    [J]. NEW ASTRONOMY REVIEWS, 2001, 45 (1-2) : 105 - 110
  • [9] Discovery of an unusual dwarf galaxy in the outskirts of the Milky Way
    Irwin, M. J.
    Belokurov, V.
    Evans, N. W.
    Ryan-Weber, E. V.
    de Jong, J. T. A.
    Koposov, S.
    Zucker, D. B.
    Hodgkin, S. T.
    Gilmore, G.
    Prema, P.
    Hebb, L.
    Begum, A.
    Fellhauer, M.
    Hewett, P. C.
    Kennicutt, R. C., Jr.
    Wilkinson, M. I.
    Bramich, D. M.
    Vidrih, S.
    Rix, H. -W.
    Beers, T. C.
    Barentine, J. C.
    Brewington, H.
    Harvanek, M.
    Krzesinski, J.
    Long, D.
    Nitta, A.
    Snedden, S. A.
    [J]. ASTROPHYSICAL JOURNAL, 2007, 656 (01) : L13 - L16
  • [10] SDSS data management and photometric quality assessment
    Ivezic, Z
    Lupton, RH
    Schlegel, D
    Boroski, B
    Adelman-McCarthy, J
    Yanny, B
    Kent, S
    Stoughton, C
    Finkbeiner, D
    Padmanabhan, N
    Rockosi, CM
    Gunn, JE
    Knapp, GR
    Strauss, MA
    Richards, GT
    Eisenstein, D
    Nicinski, T
    Kleinman, SJ
    Krzesinski, J
    Newman, PR
    Snedden, S
    Thakar, AR
    Szalay, A
    Munn, JA
    Smith, JA
    Tucker, D
    Lee, BC
    [J]. ASTRONOMISCHE NACHRICHTEN, 2004, 325 (6-8) : 583 - 589
123