SUPERMASSIVE DARK STARS: DETECTABLE IN JWST

被引：55

作者：

Freese, Katherine ^{[1
]}

Ilie, Cosmin ^{[1
]}

Spolyar, Douglas ^{[2
]}

Valluri, Monica ^{[3
]}

Bodenheimer, Peter ^{[4
]}

机构：

[1] Univ Michigan, Dept Phys, Michigan Ctr Theoret Phys, Ann Arbor, MI 48109 USA

[2] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA

[3] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA

[4] Univ Calif Santa Cruz, Dept Astron & Astrophys, UCO Lick Observ, Santa Cruz, CA 95064 USA

来源：

ASTROPHYSICAL JOURNAL | 2010年 / 716卷 / 02期

基金：

美国国家科学基金会;

关键词：

accretion; accretion disks; dark matter; stars: evolution; stars: formation; stars: pre-main sequence; DIGITAL SKY SURVEY; 1ST STARS; MATTER ANNIHILATION; Z-GREATER-THAN-5.7; QUASARS; ELLIPTIC GALAXIES; TRIAXIAL GALAXIES; EVOLUTION; MASS; REDSHIFT; SIMULATIONS;

D O I：

10.1088/0004-637X/716/2/1397

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The first phase of stellar evolution in the history of the universe may be dark stars (DSs), powered by dark matter (DM) heating rather than by nuclear fusion. Weakly interacting massive particles (WIMPs), which may be their own antipartners, collect inside the first stars and annihilate to produce a heat source that can power the stars for millions to billions of years. In this paper, we show that these objects can grow to be supermassive dark stars (SMDSs) with masses greater than or similar to(10(5)-10(7)) M-circle dot. The growth continues as long as DM heating persists, since DSs are large and cool (surface temperature less than or similar to 5 x 10(4) K) and do not emit enough ionizing photons to prevent further accretion of baryons onto the star. The DM may be provided by two mechanisms: (1) gravitational attraction of DM particles on a variety of orbits not previously considered and (2) capture of WIMPs due to elastic scattering. Once the DM fuel is exhausted, the SMDS becomes a heavy main-sequence star; these stars eventually collapse to form massive black holes (BHs) that may provide seeds for supermassive BHs in the universe. SMDSs are very bright, with luminosities exceeding (10(9)-10(11)) L-circle dot. We demonstrate that for several reasonable parameters, these objects will be detectable with the James Webb Space Telescope. Such an observational discovery would confirm the existence of a new phase of stellar evolution powered by DM.

引用

页码：1397 / 1407

页数：11

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