No cores in dark matter-dominated dwarf galaxies with bursty star formation histories

被引:69
作者
Bose, Sownak [1 ]
Frenk, Carlos S. [2 ]
Jenkins, Adrian [2 ]
Fattahi, Azadeh [2 ]
Gomez, Facundo A. [3 ,4 ]
Grand, Robert J. J. [5 ,6 ]
Marinacci, Federico [1 ]
Navarro, Julio F. [7 ]
Oman, Kyle A. [7 ,8 ]
Pakmor, Rudiger [9 ]
Schaye, Joop [10 ]
Simpson, Christine M. [5 ,11 ,12 ]
Springel, Volker [5 ,6 ,9 ]
机构
[1] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
[2] Univ Durham, Inst Computat Cosmol, South Rd, Durham DH1 3LE, England
[3] Univ La Serena, Inst Invest Multidisciplinar Ciencia & Tecnol, Raul Bitran 1305, La Serena, Chile
[4] Univ LaSerena, Dept Fis & Astron, Av Juan Cisternas 1200 N, La Serena, Chile
[5] Heidelberger Inst Theoret Studien, Schloss Wolfsbrunnenweg 35, D-69118 Heidelberg, Germany
[6] Heidelberg Univ, Zentrum Astron, Astron Recheninst, Monchhofstr 12-14, D-69120 Heidelberg, Germany
[7] Univ Victoria, Dept Phys & Astron, POB 3055 STN CSC, Victoria, BC V8W 3P6, Canada
[8] Univ Groningen, Kapteyn Astron Inst, Postbus 800, NL-9700 AV Groningen, Netherlands
[9] Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85748 Garching, Germany
[10] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
[11] Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA
[12] Univ Chicago, Dept Astron & Astrophys, 5640 S Ellis Ave, Chicago, IL 60637 USA
基金
美国国家科学基金会; 欧洲研究理事会;
关键词
galaxies: dwarf; galaxies: haloes; Local Group; galaxies: star formation; dark matter; COSMOLOGICAL SIMULATIONS; STELLAR FEEDBACK; DISC GALAXIES; ILLUSTRISTNG SIMULATIONS; EAGLE SIMULATIONS; DENSITY PROFILES; ROTATION CURVES; MASS CONTENT; CUSPS; PROJECT;
D O I
10.1093/mnras/stz1168
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Measurements of the rotation curves of dwarf galaxies are often interpreted as requiring, a constant density core at the centre, at odds with the 'cuspy' inner profiles predicted by N-body simulations of cold dark matter (CDM) haloes. It has been suggested that this conflict could be resolved by fluctuations in the inner gravitational potential caused by the periodic removal of gas following bursts of star formation. Earlier work has suggested that core formation requires a burst)/ and extended star formation history (SFH). Here we investigate the structure of CDM haloes of dwarf galaxies (M-DM similar to 10(9)-5 x 10(10) M-circle dot formed in the APOSTLE ('A Project of Simulating the 'meal l_,iivironment') and AURIGA COSMOlOgiCal hydrodynamic simulations. Our simulations have comparable or better resolution than others that make cores (M-gas similar to 10(4) M-circle dot, gravitational softening similar to 150 pc), Yet, we do not find evidence of core formation at any mass or any correlation between the inner slope of the DM density profile and temporal variations in the SH-1. APOSTLE and AURIGA dwarfs display a similar diversity in their cumulative SLI-Is to available data for Local Group dwarfs. Dwarfs in both simulations are DM-dominated on all resolved scales at all times, likely limiting the ability of gas outflows to alter significantly the central density profiles of their haloes. We conclude that recurrent bursts of star formation are not sufficient to cause the formation of cores, and that other conditions must also be met for baryons to be able to modify the central DM cusp.
引用
收藏
页码:4790 / 4804
页数:15
相关论文
共 112 条
[1]   Planck 2013 results. XVI. Cosmological parameters [J].
Ade, P. A. R. ;
Aghanim, N. ;
Armitage-Caplan, C. ;
Arnaud, M. ;
Ashdown, M. ;
Atrio-Barandela, F. ;
Aumont, J. ;
Baccigalupi, C. ;
Banday, A. J. ;
Barreiro, R. B. ;
Bartlett, J. G. ;
Battaner, E. ;
Benabed, K. ;
Benoit, A. ;
Benoit-Levy, A. ;
Bernard, J. -P. ;
Bersanelli, M. ;
Bielewicz, P. ;
Bobin, J. ;
Bock, J. J. ;
Bonaldi, A. ;
Bond, J. R. ;
Borrill, J. ;
Bouchet, F. R. ;
Bridges, M. ;
Bucher, M. ;
Burigana, C. ;
Butler, R. C. ;
Calabrese, E. ;
Cappellini, B. ;
Cardoso, J. -F. ;
Catalano, A. ;
Challinor, A. ;
Chamballu, A. ;
Chary, R. -R. ;
Chen, X. ;
Chiang, H. C. ;
Chiang, L. -Y ;
Christensen, P. R. ;
Church, S. ;
Clements, D. L. ;
Colombi, S. ;
Colombo, L. P. L. ;
Couchot, F. ;
Coulais, A. ;
Crill, B. P. ;
Curto, A. ;
Cuttaia, F. ;
Danese, L. ;
Davies, R. D. .
ASTRONOMY & ASTROPHYSICS, 2014, 571
[2]   Dark matter cores and cusps: the case of multiple stellar populations in dwarf spheroidals [J].
Amorisco, N. C. ;
Evans, N. W. .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2012, 419 (01) :184-196
[3]   Density profiles of CDM microhalos and their implications for annihilation boost factors [J].
Anderhalden, Donnino ;
Diemand, Juerg .
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2013, (04)
[4]   Earth-mass haloes and the emergence of NFW density profiles [J].
Angulo, Raul E. ;
Hahn, Oliver ;
Ludlow, Aaron D. ;
Bonoli, Silvia .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2017, 471 (04) :4697-4711
[5]   The kinematic status and mass content of the sculptor dwarf spheroidal galaxy [J].
Battaglia, G. ;
Helmi, A. ;
Tolstoy, E. ;
Irwin, M. ;
Hill, V. ;
Jablonka, P. .
ASTROPHYSICAL JOURNAL LETTERS, 2008, 681 (01) :L13-L16
[6]  
Benitez-Llambay A, 2018, PREPRINT
[7]   Halo formation in warm dark matter models [J].
Bode, P ;
Ostriker, JP ;
Turok, N .
ASTROPHYSICAL JOURNAL, 2001, 556 (01) :93-107
[8]   THE COLLISIONLESS DAMPING OF DENSITY-FLUCTUATIONS IN AN EXPANDING UNIVERSE [J].
BOND, JR ;
SZALAY, AS .
ASTROPHYSICAL JOURNAL, 1983, 274 (02) :443-468
[9]   Cosmological simulations of the growth of supermassive black holes and feedback from active galactic nuclei: method and tests [J].
Booth, C. M. ;
Schaye, Joop .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2009, 398 (01) :53-74
[10]   The Copernicus Complexio: statistical properties of warm dark matter haloes [J].
Bose, Sownak ;
Hellwing, Wojciech A. ;
Frenk, Carlos S. ;
Jenkins, Adrian ;
Lovell, Mark R. ;
Helly, John C. ;
Li, Baojiu .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2016, 455 (01) :318-333