Tracing the Sgr Stream with 2MASS - Detection of Stream stars around Outer Halo globular clusters

被引：63
作者：
Bellazzini, M
Ibata, R
Ferraro, FR
Testa, V
机构：
[1] Osservatorio Astron Bologna, INAF, I-40127 Bologna, Italy
[2] Observ Strasbourg, F-67000 Strasbourg, France
[3] Univ Bologna, Dipartimento Astron, I-40127 Bologna, Italy
[4] Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, Italy
来源：
ASTRONOMY & ASTROPHYSICS | 2003年 / 405卷 / 02期
关键词：
Galaxy : halo; Galaxy : structure; globular clusters : individual : Pal 12; NGC; 4147;
D O I：
10.1051/0004-6361:20030649
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We use infrared Color Magnitude Diagrams from the 2-Micron All-Sky Survey (2MASS) to search for stars belonging to the tidal stream of the Sagittarius dwarf spheroidal galaxy (Sgr dSph) around selected Galactic globular clusters. Statistically significant detections are presented for the cases of Pal 12 and NGC 4147, strongly supporting the idea that these clusters are associated with the Sgr Stream and that they were previous members of the Sgr dSph galaxy.
引用
收藏
页码：577 / 583
页数：7
相关论文
共 34 条
[1]   Metallicity gradients in the Sagittarius dwarf spheroidal Galaxy [J].
Alard, C .
ASTRONOMY & ASTROPHYSICS, 2001, 377 (02) :389-395
[2]   Building up the globular cluster system of the Milky Way: The contribution of the Sagittarius galaxy [J].
Bellazzini, M ;
Ferraro, FR ;
Ibata, R .
ASTRONOMICAL JOURNAL, 2003, 125 (01) :188-196
[3]   The 2MASS color-magnitude diagram of the center of the Sagittarius dwarf galaxy: Photometric measurements of a surprisingly high mean metallicity [J].
Cole, AA .
ASTROPHYSICAL JOURNAL, 2001, 559 (01) :L17-L20
[4]   The absolute proper motion of Palomar 12: A case for tidal capture from the Sagittarius dwarf spheroidal galaxy [J].
Dinescu, DI ;
Majewski, SR ;
Girard, TM ;
Cudworth, KM .
ASTRONOMICAL JOURNAL, 2000, 120 (04) :1892-1905
[5]   Mapping the galactic halo.: V.: Sagittarius dwarf spheroidal tidal debris 60° from the main body [J].
Dohm-Palmer, RC ;
Helmi, A ;
Morrison, H ;
Mateo, M ;
Olszewski, EW ;
Harding, P ;
Freeman, KC ;
Norris, J ;
Shectman, SA .
ASTROPHYSICAL JOURNAL, 2001, 555 (01) :L37-L40
[6]  
Fahlman GG, 1996, ASTROPHYS J, V459, pL65, DOI 10.1086/309955
[7]   A catalog of parameters for globular clusters in the Milky Way [J].
Harris, WE .
ASTRONOMICAL JOURNAL, 1996, 112 (04) :1487-1488
[8]   Debris streams in the solar neighbourhood as relicts from the formation of the Milky Way [J].
Helmi, A ;
White, SDM ;
de Zeeuw, PT ;
Zhao, HS .
NATURE, 1999, 402 (6757) :53-55
[9]   Great circle tidal streams: Evidence for a nearly spherical massive dark halo around the Milky Way [J].
Ibata, R ;
Lewis, GF ;
Irwin, M ;
Totten, E ;
Quinn, T .
ASTROPHYSICAL JOURNAL, 2001, 551 (01) :294-311
[10]   Galactic indigestion: Numerical simulations of the Milky Way's closest neighbor [J].
Ibata, RA ;
Lewis, GF .
ASTROPHYSICAL JOURNAL, 1998, 500 (02) :575-590
1234