Bifurcation in the Tidal Streams of Sagittarius: Numerical Simulations

被引：0

作者：

Camargo Camargo, Yeimy ^{[1
,2
]}

Casas-Miranda, Rigoberto A. ^{[2
]}

机构：

[1] Univ Cundinamarca, Facatativa, Colombia

[2] Univ Nacl Colombia, Bogota, Colombia

来源：

TECCIENCIA | 2018年 / 13卷 / 24期

关键词：

Galaxy: evolution; Galaxy: formation; Galaxies: individual (Sagittarius dSph);

D O I：

10.18180/tecciencia.2018.24.6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

N-body simulations of the interaction between the Sagittarius dwarf galaxy and the Milky Way are performed to study whether it is possible to reproduce both the bifurcations in the tidal streams and the physical properties of Sagittarius. Both galaxies are simulated as sets of particles (live potentials). The initial structures are formed using GALIC and the gravitational interaction between these galaxies is simulated with GADGET-2. Sagittarius initially is simulated as a rotating disk-type galaxy with two components: dark matter halo and stellar disk and the Milky Way is a disk galaxy with three components: dark matter halo, stellar disk and central spheroid. Several numerical simulations of the interaction of this galaxy with the Milky Way with angles between the orbital angular momentum and the disc angular momentum in the range 180 degrees <= theta <= 0 degrees were performed, showing that, although the position and physical properties of Sagittarius are not reproduced entirely by the remnant, the bifurcations appear clearly when 180 degrees <= theta < 90 degrees.

引用

页码：53 / 62

页数：10

共 37 条

[1] 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

[2] The field of streams: Sagittarius and its siblings [J].

Belokurov, V. ;

Zucker, D. B. ;

Evans, N. W. ;

Gilmore, G. ;

Vidrih, S. ;

Bramich, D. M. ;

Newberg, H. J. ;

Wyse, R. F. G. ;

Irwin, M. J. ;

Fellhauer, M. ;

Hewett, P. C. ;

Walton, N. A. ;

Wilkinson, M. I. ;

Cole, N. ;

Yanny, B. ;

Rockosi, C. M. ;

Beers, T. C. ;

Bell, E. F. ;

Brinkmann, J. ;

Ivezic, Z. . ;

Lupton, R. .

ASTROPHYSICAL JOURNAL, 2006, 642 (02) :L137-L140

[3] Origin of the Milky Way Disk of Satellites: Collision of Two Disk Galaxies [J].

Bohorquez Pacheco, Omar Alfonso ;

Casas Miranda, Rigoberto A. .

TECCIENCIA, 2016, 11 (21) :33-37

[4]

Burton WB, 1999, ASTRON ASTROPHYS, V349, P7

[5]

Camargo Y., 2016, SIMULACIONES NUMERIC

[6]

Camargo YD, 2017, REV MEX AST ASTR, V49, P113

[7] Dwarf spheroidal satellites of the Milky Way from dark matter free tidal dwarf galaxy progenitors: maps of orbits [J].

Casas, R. A. ;

Arias, V. ;

Pena Ramirez, K. ;

Kroupa, P. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2012, 424 (03) :1941-1951

[8] The origin of the bifurcation in the sagittarius stream [J].

Fellhauer, M. ;

Belokurov, V. ;

Evans, N. W. ;

Wilkinson, M. I. ;

Zucker, D. B. ;

Gilmore, G. ;

Irwin, M. J. ;

Bramich, D. M. ;

Vidrih, S. ;

Wyse, R. F. G. ;

Beers, T. C. ;

Brinkmann, J. .

ASTROPHYSICAL JOURNAL, 2006, 651 (01) :167-173

[9]

Goerdt T, 2008, MON NOT R ASTRON SOC, V385, P2136, DOI [10.1111/j.1365-2966.2008.12982.x, 10.1111/j.1365-2966.2008.x]

[10]

Gomez-Flechoso MA, 1999, ASTRON ASTROPHYS, V347, P77

← 1 2 3 4 →