EROS and MACHO combined limits on planetary-mass dark matter in the galactic halo

被引：165

作者：

Alcock, C ^{[1
]}

Allsman, RA

Alves, D

Ansari, R

Aubourg, E

Axelrod, TS

Bareyre, P

Beaulieu, JP

Becker, AC

Bennett, DP

Brehin, S

Cavalier, F

Char, S

Cook, KH

Ferlet, R

Fernandez, J

Freeman, KC

Griest, K

Grison, P

Gros, M

Gry, C

Guibert, J

Lachieze-Rey, M

Laurent, B

Lehner, MJ

Lesquoy, E

Magneville, C

Marshall, SL

Maurice, E

Milsztajn, A

Minniti, D

Moniez, M

Moreau, O

Moscoso, L

Palanque-Delabrouille, N

Peterson, BA

Pratt, MR

Prevot, L

Queinnec, F

Quinn, PJ

Renault, C

Rich, J

Spiro, M

Stubbs, CW

Sutherland, W

Tomaney, A

Vandehei, T

Vidal-Madjar, A

Vigroux, L

Zylberajch, S

机构：

[1] Univ Calif Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[2] Univ Calif Berkeley, Ctr Particle Astrophys, Berkeley, CA 94720 USA

[3] Australian Natl Univ, Supercomp Facil, Canberra, ACT 0200, Australia

[4] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

[5] Univ Paris Sud, CNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, France

[6] Ctr Etud Saclay, DAPNIA, DSM, CEA, F-91191 Gif Sur Yvette, France

[7] Australian Natl Univ, Mt Stromlo & Siding Spring Observ, Weston, ACT 2611, Australia

[8] Coll France, Phys Corpusculaire Lab, CNRS, IN2P3,LA 41,Lab Associe, F-75231 Paris 05, France

[9] CNRS, INSU, Inst Astrophys Paris, F-75014 Paris, France

[10] Kapleyn Astron Inst, NL-9700 AV Groningen, Netherlands

[11] Univ Washington, Dept Astron, Seattle, WA 98195 USA

[12] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[13] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[14] Univ La Serena, Fac Ciencias, Dept Fis, La Serena, Chile

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

[16] Lab Astron Spatiale Marseille, F-13120 Marseille, France

[17] Observ Paris, INSU, Ctr Anal Images, F-75014 Paris, France

[18] Univ Sheffield, Dept Phys, Sheffield S3 7RH, S Yorkshire, England

[19] Observ Marseille, F-13248 Marseille 04, France

[20] MIT, Ctr Space Res, Cambridge, MA 02139 USA

[21] European So Observ, D-85748 Garching, Germany

[22] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany

[23] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

来源：

ASTROPHYSICAL JOURNAL | 1998年 / 499卷 / 01期

基金：

美国国家科学基金会;

关键词：

dark matter; gravitational lensing; stars; low-mass; brown dwarfs;

D O I：

10.1086/311355

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The EROS and MACHO collaborations have each published upper limits on the amount of planetary-mass dark matter in the Galactic halo obtained from gravitational microlensing searches. In this Letter, the two limits are combined to give a much stronger constraint on the abundance of low-mass MACHOs. Specifically, objects with masses 10(-7) M. less than or similar to m less than or similar to 10(-3) M. make up less than 25% of the halo dark matter for most models considered, and less than 10% of a standard spherical halo is made of MACHOs in the 3.5 x 10(-7) M. < m < 4.5 x 10(-5) M. mass range.

引用

页码：L9 / L12

页数：4

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