Detection of CDM substructure

N. Dalal; C. S. Kochanek

doi:10.1016/S0920-5632(03)02094-2

Detection of CDM substructure

N. Dalal, C. S. Kochanek

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

Abstract

The properties of multiple image gravitational lenses require a fractional surface mass density in satellites of f_sat = 0.02 (0.006 ≲ f_sat ≲ 0.07 at 90% confidence) that is consistent with the expectations for CDM. The characteristic satellite mass scale, 10⁶-10⁹ M_⊙, is also consistent with the expectations for CDM. The agreement between the observed and expected density of CDM substructure supports the basic CDM paradigm, and disfavors modifications to the CDM theory such as self-interacting dark matter or a warm dark matter component.

Original language	English (US)
Pages (from-to)	144-147
Number of pages	4
Journal	Nuclear Physics B - Proceedings Supplements
Volume	124
DOIs	https://doi.org/10.1016/S0920-5632(03)02094-2
State	Published - Jul 2003
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics

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10.1016/S0920-5632(03)02094-2

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title = "Detection of CDM substructure",

abstract = "The properties of multiple image gravitational lenses require a fractional surface mass density in satellites of fsat = 0.02 (0.006 ≲ fsat ≲ 0.07 at 90% confidence) that is consistent with the expectations for CDM. The characteristic satellite mass scale, 106-109 M⊙, is also consistent with the expectations for CDM. The agreement between the observed and expected density of CDM substructure supports the basic CDM paradigm, and disfavors modifications to the CDM theory such as self-interacting dark matter or a warm dark matter component.",

author = "N. Dalal and Kochanek, {C. S.}",

note = "Funding Information: Extended radio structure also can be used to estimate the surface density over larger areas of the lens than point sources, and can be used to study the internal structure of the satellites. Finally, more lenses will reduce the statistical uncertainties. This includes finding more lenses and more detailed studies of existing lenses to find enough constraints on the macro model to allow a substructure analysis. Acknowledgments: CSK was supported by the Smithsonian Institution and NASA grants NAG58831 and NAG5-9265. ND was supported by the Smithsonian Institution Short Term Visitor Program, DOE grant DOEFG03-97-ER 40546 and the ARCS Foundation.",

year = "2003",

month = jul,

doi = "10.1016/S0920-5632(03)02094-2",

language = "English (US)",

volume = "124",

pages = "144--147",

journal = "Nuclear Physics B - Proceedings Supplements",

issn = "0920-5632",

publisher = "Elsevier B.V.",

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AU - Dalal, N.

AU - Kochanek, C. S.

N1 - Funding Information: Extended radio structure also can be used to estimate the surface density over larger areas of the lens than point sources, and can be used to study the internal structure of the satellites. Finally, more lenses will reduce the statistical uncertainties. This includes finding more lenses and more detailed studies of existing lenses to find enough constraints on the macro model to allow a substructure analysis. Acknowledgments: CSK was supported by the Smithsonian Institution and NASA grants NAG58831 and NAG5-9265. ND was supported by the Smithsonian Institution Short Term Visitor Program, DOE grant DOEFG03-97-ER 40546 and the ARCS Foundation.

PY - 2003/7

Y1 - 2003/7

N2 - The properties of multiple image gravitational lenses require a fractional surface mass density in satellites of fsat = 0.02 (0.006 ≲ fsat ≲ 0.07 at 90% confidence) that is consistent with the expectations for CDM. The characteristic satellite mass scale, 106-109 M⊙, is also consistent with the expectations for CDM. The agreement between the observed and expected density of CDM substructure supports the basic CDM paradigm, and disfavors modifications to the CDM theory such as self-interacting dark matter or a warm dark matter component.

AB - The properties of multiple image gravitational lenses require a fractional surface mass density in satellites of fsat = 0.02 (0.006 ≲ fsat ≲ 0.07 at 90% confidence) that is consistent with the expectations for CDM. The characteristic satellite mass scale, 106-109 M⊙, is also consistent with the expectations for CDM. The agreement between the observed and expected density of CDM substructure supports the basic CDM paradigm, and disfavors modifications to the CDM theory such as self-interacting dark matter or a warm dark matter component.

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JO - Nuclear Physics B - Proceedings Supplements

JF - Nuclear Physics B - Proceedings Supplements

ER -

Detection of CDM substructure

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