Gas Removal in the Ursa Minor Galaxy: Linking Hydrodynamics and Chemical Evolution Models

被引：11

作者：

Caproni, Anderson ^{[1
]}

Lanfranchi, Gustavo Amaral ^{[1
]}

Campos Baio, Gabriel Henrique ^{[1
]}

Kowal, Grzegorz ^{[1
,2
]}

Falceta-Goncalves, Diego ^{[2
]}

机构：

[1] Univ Cruzeiro Sul, Nucleo Astrofis Teor, R Galvao Bueno 868, BR-01506000 Sao Paulo, SP, Brazil

[2] Univ Sao Paulo, Escola Artes Ciencias Humanidades, Rua Arlindo Bettio 1000, BR-03828000 Sao Paulo, Brazil

来源：

ASTROPHYSICAL JOURNAL | 2017年 / 838卷 / 02期

基金：

巴西圣保罗研究基金会;

关键词：

galaxies: dwarf; galaxies: evolution; galaxies: individual (Ursa Minor); galaxies: ISM; hydrodynamics; methods: numerical; DWARF SPHEROIDAL GALAXIES; MILKY-WAY SATELLITES; STAR-FORMATION HISTORY; RAM PRESSURE; LOCAL GROUP; MASS-LOSS; METALLICITY DISTRIBUTION; DARK-MATTER; H I; SIMULATIONS;

D O I：

10.3847/1538-4357/aa6002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results from a non-cosmological, three-dimensional hydrodynamical simulation of the gas in the dwarf spheroidal galaxy Ursa Minor. Assuming an initial baryonic-to-dark-matter ratio derived from the cosmic microwave background radiation, we evolved the galactic gas distribution over 3 Gyr, taking into account the effects of the types Ia and II supernovae. For the first time, we used in our simulation the instantaneous supernovae rates derived from a chemical evolution model applied to spectroscopic observational data of Ursa Minor. We show that the amount of gas that is lost in this process is variable with time and radius, being the highest rates observed during the initial 600 Myr in our simulation. Our results indicate that types Ia and II supernovae must be essential drivers of the gas loss in Ursa Minor galaxy (and probably in other similar dwarf galaxies), but it is ultimately the combination of galactic winds powered by these supernovae and environmental effects (e. g., ram-pressure stripping) that results in the complete removal of the gas content.

引用

页数：9

共 43 条

[1] The HI Parkes All Sky Survey:: southern observations, calibration and robust imaging [J].

Barnes, DG ;

Staveley-Smith, L ;

de Blok, WJG ;

Oosterloo, T ;

Stewart, IM ;

Wright, AE ;

Banks, GD ;

Bhathal, R ;

Boyce, PJ ;

Calabretta, MR ;

Disney, MJ ;

Drinkwater, MJ ;

Ekers, RD ;

Freeman, KC ;

Gibson, BK ;

Green, AJ ;

Haynes, RF ;

Hekkert, PTL ;

Henning, PA ;

Jerjen, B ;

Juraszek, S ;

Kesteven, MJ ;

Kilborn, VA ;

Knezek, PM ;

Koribalski, B ;

Kraan-Korteweg, RC ;

Malin, DE ;

Marquarding, M ;

Minchin, RF ;

Mould, JR ;

Price, RM ;

Putman, ME ;

Ryder, SD ;

Sadler, EM ;

Schröder, A ;

Stootman, F ;

Webster, RL ;

Wilson, WE ;

Ye, T .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2001, 322 (03) :486-498

[2] Cats and dogs, hair and a hero: A quintet of new Milky Way companions [J].

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. .

ASTROPHYSICAL JOURNAL, 2007, 654 (02) :897-906

[3]

Binney J., 1987, GALACTIC DYNAMICS, P601

[4] Gas-rich dwarf spheroidals [J].

Blitz, L ;

Robishaw, T .

ASTROPHYSICAL JOURNAL, 2000, 541 (02) :675-687

[5] THREE-DIMENSIONAL HYDRODYNAMICAL SIMULATIONS OF THE SUPERNOVAE-DRIVEN GAS LOSS IN THE DWARF SPHEROIDAL GALAXY URSA MINOR [J].

Caproni, A. ;

Lanfranchi, G. A. ;

Luiz da Silva, A. ;

Falceta-Goncalves, D. .

ASTROPHYSICAL JOURNAL, 2015, 805 (02)

[6] The star formation history and spatial distribution of stellar populations in the Ursa Minor dwarf spheroidal galaxy [J].

Carrera, R ;

Aparicio, A ;

Martínez-Delgado, D ;

Alonso-García, J .

ASTRONOMICAL JOURNAL, 2002, 123 (06) :3199-3209

[7] DYNAMICS OF RADIATIVE SUPERNOVA-REMNANTS [J].

CIOFFI, DF ;

MCKEE, CF ;

BERTSCHINGER, E .

ASTROPHYSICAL JOURNAL, 1988, 334 (01) :252-265

[8] Numerical overcooling in shocks [J].

Creasey, Peter ;

Theuns, Tom ;

Bower, Richard G. ;

Lacey, Cedric G. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2011, 415 (04) :3706-3720

[9] Feedback and the fundamental line of low-luminosity low-surface-brightness/dwarf galaxies [J].

Dekel, A ;

Woo, J .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2003, 344 (04) :1131-1144

[10] Clumps and streams in the local dark matter distribution [J].

Diemand, J. ;

Kuhlen, M. ;

Madau, P. ;

Zemp, M. ;

Moore, B. ;

Potter, D. ;

Stadel, J. .

NATURE, 2008, 454 (7205) :735-738

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