Variable accretion rates and fluffy first stars

被引：42

作者：

Smith, Rowan J. ^{[1
]}

Hosokawa, Takashi ^{[2
]}

Omukai, Kazuyuki ^{[3
]}

Glover, Simon C. O. ^{[1
]}

Klessen, Ralf S. ^{[1
]}

机构：

[1] Univ Heidelberg, Zentrum Astron, ITA, D-69120 Heidelberg, Germany

[2] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[3] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2012年 / 424卷 / 01期

基金：

日本学术振兴会;

关键词：

stars: formation; stars: Population III; stars: pre-main-sequence; early Universe; GAMMA-RAY BURSTS; INITIAL MASS FUNCTION; POPULATION III STARS; GRAVOTURBULENT FRAGMENTATION; TURBULENT FRAGMENTATION; PROTOSTELLAR FEEDBACK; EPISODIC ACCRETION; EVOLUTION; BINARIES; PROTOSTARS;

D O I：

10.1111/j.1365-2966.2012.21211.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We combine the output of hydrodynamical simulations of Population III star cluster formation with stellar evolution models, and calculate the evolution of protostars experiencing variable mass accretion rates due to interactions within a massive disc. We find that the primordial protostars are extended fluffy objects for the bulk of their pre-main-sequence lifetimes. Accretion luminosity feedback from such objects is high, but, as shown in previous work, it has a minimal effect on the star cluster. The extended radii of the protostars, combined with the observation of close encounters in the simulations, suggest that mergers will occur in such systems. Furthermore, mass transfer between close protostellar binaries with extended radii could lead to massive tight binaries, which are a possible progenitor of gamma-ray bursts.

引用

页码：457 / 463

页数：7

共 41 条

[1] Effect of episodic accretion on the structure and the lithium depletion of low-mass stars and planet-hosting stars
Baraffe, I.
Chabrier, G.
[J]. ASTRONOMY & ASTROPHYSICS, 2010, 521
[2] EPISODIC ACCRETION AT EARLY STAGES OF EVOLUTION OF LOW-MASS STARS AND BROWN DWARFS: A SOLUTION FOR THE OBSERVED LUMINOSITY SPREAD IN H-R DIAGRAMS?
Baraffe, I.
Chabrier, G.
Gallardo, J.
[J]. ASTROPHYSICAL JOURNAL LETTERS, 2009, 702 (01): : L27 - L31
[3] MODELING ACCRETION IN PROTOBINARY SYSTEMS
BATE, MR
BONNELL, IA
PRICE, NM
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1995, 277 (02) : 362 - 376
[4] The role of stellar collisions for the formation of massive stars
Baumgardt, H.
Klessen, R. S.
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2011, 413 (03) : 1810 - 1818
[5] The efficiency of star formation in clustered and distributed regions
Bonnell, Ian A.
Smith, Rowan J.
Clark, Paul C.
Bate, Matthew R.
[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2011, 410 (04) : 2339 - 2346
[6] High-redshift gamma-ray bursts from population III progenitors
Bromm, V
Loeb, A
[J]. ASTROPHYSICAL JOURNAL, 2006, 642 (01) : 382 - 388
[7] The Formation and Fragmentation of Disks Around Primordial Protostars
Clark, Paul C.
Glover, Simon C. O.
Smith, Rowan J.
Greif, Thomas H.
Klessen, Ralf S.
Bromm, Volker
[J]. SCIENCE, 2011, 331 (6020) : 1040 - 1042
[8] GRAVITATIONAL FRAGMENTATION IN TURBULENT PRIMORDIAL GAS AND THE INITIAL MASS FUNCTION OF POPULATION III STARS
Clark, Paul C.
Glover, Simon C. O.
Klessen, Ralf S.
Bromm, Volker
[J]. ASTROPHYSICAL JOURNAL, 2011, 727 (02)
[9] MODELING COLLAPSE AND ACCRETION IN TURBULENT GAS CLOUDS: IMPLEMENTATION AND COMPARISON OF SINK PARTICLES IN AMR AND SPH
Federrath, Christoph
Banerjee, Robi
Clark, Paul C.
Klessen, Ralf S.
[J]. ASTROPHYSICAL JOURNAL, 2010, 713 (01) : 269 - 290
[10] Formation rates of black hole accretion disk gamma-ray bursts
Fryer, CL
Woosley, SE
Hartmann, DH
[J]. ASTROPHYSICAL JOURNAL, 1999, 526 (01) : 152 - 177

← 1 2 3 4 5 →