External pressure-triggering of star formation in a disc galaxy: a template for positive feedback

被引：56
作者：
Bieri, Rebekka [1 ,2 ]
Dubois, Yohan [1 ,2 ]
Silk, Joseph [1 ,2 ,3 ,4 ,5 ]
Mamon, Gary A. [1 ,2 ]
Gaibler, Volker [6 ]
机构：
[1] Univ Paris 04, Inst Astrophys Paris, UMR 7095, CNRS, F-75014 Paris, France
[2] Univ Paris 04, UPMC, F-75014 Paris, France
[3] Univ Paris 07, CNRS, CEA DSM IRFU, Lab AIM Paris Saclay, F-91191 Gif Sur Yvette, France
[4] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA
[5] Univ Oxford, Dept Phys, BIPAC, Oxford OX1 3RH, England
[6] Heidelberg Univ, Inst Theoret Astrophys, D-69120 Heidelberg, Germany
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2016年 / 455卷 / 04期
基金：
美国国家科学基金会;
关键词：
methods; numerical; -; galaxies; active; formation; ACTIVE GALACTIC NUCLEI; SUPERMASSIVE BLACK-HOLES; JET-INDUCED FEEDBACK; COSMOLOGICAL SIMULATIONS; MOLECULAR CLOUDS; RADIO-SOURCES; HIGH-REDSHIFT; INTERSTELLAR-MEDIUM; MINKOWSKIS OBJECT; FORMATION RATES;
D O I：
10.1093/mnras/stv2551
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Feedback from active galactic nuclei (AGN) has often been invoked both in simulations and in interpreting observations for regulating star formation and quenching cooling flows in massive galaxies. AGN activity can, however, also overpressurize the dense star-forming regions of galaxies and thus enhance star formation, leading to a positive feedback effect. To understand this pressurization better, we investigate the effect of an ambient external pressure on gas fragmentation and triggering of starburst activity by means of hydrodynamical simulations. We find that moderate levels of overpressurization of the galaxy boost the global star formation rate of the galaxy by an order of magnitude, turn stable discs unstable, and lead to significant fragmentation of the gas content of the galaxy, similar to what is observed in high-redshift galaxies.
引用
收藏
页码：4166 / 4182
页数：17
相关论文
共 78 条
[1]   Active galactic nuclei jet-induced feedback in galaxies - I. Suppression of star formation [J].
Antonuccio-Delogu, V. ;
Silk, J. .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2008, 389 (04) :1750-1762
[2]   Active galactic nuclei activity: self-regulation from backflow [J].
Antonuccio-Delogu, V. ;
Silk, Joseph .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2010, 405 (02) :1303-1314
[3]   The accretion mechanism in low-power radio galaxies [J].
Balmaverde, B. ;
Baldi, R. D. ;
Capetti, A. .
ASTRONOMY & ASTROPHYSICS, 2008, 486 (01) :119-U98
[4]   OVERPRESSURED COCOONS IN EXTRAGALACTIC RADIO-SOURCES [J].
BEGELMAN, MC ;
CIOFFI, DF .
ASTROPHYSICAL JOURNAL, 1989, 345 (01) :L21-L24
[5]   Jet-induced emission-line nebulosity and star formation in the high-redshift radio galaxy 4C 41.17 [J].
Bicknell, GV ;
Sutherland, RS ;
Van Breugel, WJM ;
Dopita, MA ;
Dey, A ;
Miley, GK .
ASTROPHYSICAL JOURNAL, 2000, 540 (02) :678-686
[6]   PLAYING WITH POSITIVE FEEDBACK: EXTERNAL PRESSURE-TRIGGERING OF A STAR-FORMING DISK GALAXY [J].
Bieri, Rebekka ;
Dubois, Yohan ;
Silk, Joseph ;
Mamon, Gary A. .
ASTROPHYSICAL JOURNAL LETTERS, 2015, 812 (02)
[7]   A systematic study of radio-induced X-ray cavities in clusters, groups, and galaxies [J].
Bîrzan, L ;
Rafferty, DA ;
McNamara, BR ;
Wise, MW ;
Nulsen, PEJ .
ASTROPHYSICAL JOURNAL, 2004, 607 (02) :800-809
[8]   Towards a more realistic sink particle algorithm for the RAMSES CODE [J].
Bleuler, Andreas ;
Teyssier, Romain .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2014, 445 (04) :4015-4036
[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]   Breaking the hierarchy of galaxy formation [J].
Bower, R. G. ;
Benson, A. J. ;
Malbon, R. ;
Helly, J. C. ;
Frenk, C. S. ;
Baugh, C. M. ;
Cole, S. ;
Lacey, C. G. .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2006, 370 (02) :645-655
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