EROS and MACHO combined limits on planetary-mass dark matter in the galactic halo
- Alcock, C
- Allsman, RA
- Alves, D
- Ansari, R
- Aubourg, E
- Axelrod, TS
- Bareyre, P
- Beaulieu, J P
- 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
DOIAbstract
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.</p
Add to ORKG