New Limits on Primordial Black Hole Dark Matter from an Analysis of Kepler Source Microlensing Data

被引：148

作者：

Griest, Kim ^{[1
]}

Cieplak, Agnieszka M. ^{[1
,4
]}

Lehner, Matthew J. ^{[2
,3
]}

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[2] Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan

[3] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA

[4] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 18期

基金：

美国国家科学基金会;

关键词：

MACHO PROJECT; GALACTIC HALO; STARS;

D O I：

10.1103/PhysRevLett.111.181302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present new limits on the allowed masses of a dark matter (DM) halo consisting of primordial black holes (PBH) (or any other massive compact halo object). We analyze two years of data from the Kepler satellite, searching for short-duration bumps caused by gravitational microlensing. After removing background events consisting of variable stars, flare events, and comets or asteroids moving through the Kepler field, we find no microlensing candidates. We measure the efficiency of our selection criteria by adding millions of simulated microlensing lensing events into the Kepler light curves. We find that PBH DM with masses in the range 2 x 10(-9)M(circle dot) to 10(-7)M(circle dot) cannot make up the entirety of the DM in the Milky Way. At the low-mass end, this decreases the allowed mass range by more than an order of magnititude.

引用

页数：5

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