Macho project limits on black hole dark matter in the 1-30 M⊙ range

C. Alcock; R. A. Allsman; D. R. Alves; T. S. Axelrod; A. C. Becker; D. P. Bennett; K. H. Cook; N. Dalal; A. J. Drake; K. C. Freeman; M. Geha; K. Griest; M. J. Lehner; S. L. Marshall; D. Minniti; C. A. Nelson; B. A. Peterson; P. Popowski; M. R. Pratt; P. J. Quinn; C. W. Stubbs; W. Sutherland; A. B. Tomaney; T. Vandehei; D. L. Welch

doi:10.1086/319636

Macho project limits on black hole dark matter in the 1-30 M_⊙ range

C. Alcock^*, R. A. Allsman, D. R. Alves, T. S. Axelrod, A. C. Becker, D. P. Bennett, K. H. Cook, N. Dalal, A. J. Drake, K. C. Freeman, M. Geha, K. Griest, M. J. Lehner, S. L. Marshall, D. Minniti, C. A. Nelson, B. A. Peterson, P. Popowski, M. R. Pratt, P. J. QuinnC. W. Stubbs, W. Sutherland, A. B. Tomaney, T. Vandehei, D. L. Welch

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

We report on a search for long-duration microlensing events toward the Large Magellanic Cloud. We find none and therefore put limits on the contribution of high-mass objects to the Galactic dark matter. At a 95% confidence level, we exclude objects in the mass range of 0.3-30.0 M_⊙ from contributing more than 4 × 10¹¹ M_⊙ to the Galactic halo. Combined with earlier results, this means that objects with masses under 30 M_⊙ cannot make up the entire dark matter halo if the halo is of typical size. For a typical dark halo, objects with masses under 10 M_⊙ contribute less than 40% of the dark matter.

Original language	English
Pages (from-to)	L169-L172
Journal	Astrophysical Journal
Volume	550
Issue number	2 PART 2
DOIs	https://doi.org/10.1086/319636
Publication status	Published - 1 Apr 2001

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Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., Bennett, D. P., Cook, K. H., Dalal, N., Drake, A. J., Freeman, K. C., Geha, M., Griest, K., Lehner, M. J., Marshall, S. L., Minniti, D., Nelson, C. A., Peterson, B. A., Popowski, P., Pratt, M. R., ... Welch, D. L. (2001). Macho project limits on black hole dark matter in the 1-30 M_⊙ range. Astrophysical Journal, 550(2 PART 2), L169-L172. https://doi.org/10.1086/319636

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title = "Macho project limits on black hole dark matter in the 1-30 M⊙ range",

abstract = "We report on a search for long-duration microlensing events toward the Large Magellanic Cloud. We find none and therefore put limits on the contribution of high-mass objects to the Galactic dark matter. At a 95% confidence level, we exclude objects in the mass range of 0.3-30.0 M⊙ from contributing more than 4 × 1011 M⊙ to the Galactic halo. Combined with earlier results, this means that objects with masses under 30 M⊙ cannot make up the entire dark matter halo if the halo is of typical size. For a typical dark halo, objects with masses under 10 M⊙ contribute less than 40% of the dark matter.",

keywords = "Black hole physics, Dark matter, Galaxy: halo, Galaxy: structure, Gravitational lensing",

author = "C. Alcock and Allsman, {R. A.} and Alves, {D. R.} and Axelrod, {T. S.} and Becker, {A. C.} and Bennett, {D. P.} and Cook, {K. H.} and N. Dalal and Drake, {A. J.} and Freeman, {K. C.} and M. Geha and K. Griest and Lehner, {M. J.} and Marshall, {S. L.} and D. Minniti and Nelson, {C. A.} and Peterson, {B. A.} and P. Popowski and Pratt, {M. R.} and Quinn, {P. J.} and Stubbs, {C. W.} and W. Sutherland and Tomaney, {A. B.} and T. Vandehei and Welch, {D. L.}",

year = "2001",

month = apr,

day = "1",

doi = "10.1086/319636",

language = "English",

volume = "550",

pages = "L169--L172",

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Alcock, C, Allsman, RA, Alves, DR, Axelrod, TS, Becker, AC, Bennett, DP, Cook, KH, Dalal, N, Drake, AJ, Freeman, KC, Geha, M, Griest, K, Lehner, MJ, Marshall, SL, Minniti, D, Nelson, CA, Peterson, BA, Popowski, P, Pratt, MR, Quinn, PJ, Stubbs, CW, Sutherland, W, Tomaney, AB, Vandehei, T & Welch, DL 2001, 'Macho project limits on black hole dark matter in the 1-30 M_⊙ range', Astrophysical Journal, vol. 550, no. 2 PART 2, pp. L169-L172. https://doi.org/10.1086/319636

TY - JOUR

T1 - Macho project limits on black hole dark matter in the 1-30 M⊙ range

AU - Alcock, C.

AU - Allsman, R. A.

AU - Alves, D. R.

AU - Axelrod, T. S.

AU - Becker, A. C.

AU - Bennett, D. P.

AU - Cook, K. H.

AU - Dalal, N.

AU - Drake, A. J.

AU - Freeman, K. C.

AU - Geha, M.

AU - Griest, K.

AU - Lehner, M. J.

AU - Marshall, S. L.

AU - Minniti, D.

AU - Nelson, C. A.

AU - Peterson, B. A.

AU - Popowski, P.

AU - Pratt, M. R.

AU - Quinn, P. J.

AU - Stubbs, C. W.

AU - Sutherland, W.

AU - Tomaney, A. B.

AU - Vandehei, T.

AU - Welch, D. L.

PY - 2001/4/1

Y1 - 2001/4/1

N2 - We report on a search for long-duration microlensing events toward the Large Magellanic Cloud. We find none and therefore put limits on the contribution of high-mass objects to the Galactic dark matter. At a 95% confidence level, we exclude objects in the mass range of 0.3-30.0 M⊙ from contributing more than 4 × 1011 M⊙ to the Galactic halo. Combined with earlier results, this means that objects with masses under 30 M⊙ cannot make up the entire dark matter halo if the halo is of typical size. For a typical dark halo, objects with masses under 10 M⊙ contribute less than 40% of the dark matter.

AB - We report on a search for long-duration microlensing events toward the Large Magellanic Cloud. We find none and therefore put limits on the contribution of high-mass objects to the Galactic dark matter. At a 95% confidence level, we exclude objects in the mass range of 0.3-30.0 M⊙ from contributing more than 4 × 1011 M⊙ to the Galactic halo. Combined with earlier results, this means that objects with masses under 30 M⊙ cannot make up the entire dark matter halo if the halo is of typical size. For a typical dark halo, objects with masses under 10 M⊙ contribute less than 40% of the dark matter.

KW - Black hole physics

KW - Dark matter

KW - Galaxy: halo

KW - Galaxy: structure

KW - Gravitational lensing

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U2 - 10.1086/319636

DO - 10.1086/319636

M3 - Article

SN - 0004-637X

VL - 550

SP - L169-L172

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 PART 2

ER -

Macho project limits on black hole dark matter in the 1-30 M_⊙ range

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