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We propose a novel method utilizing stellar kinematic data to detect low-mass substructure in the Milky Way’s dark matter halo. By probing characteristic wakes that a passing dark matter subhalo leaves in the phase-space distribution of ambient halo stars, we estimate sensitivities down to subhalo masses of ∼10[superscript 7]  M[subscript ⊙] or below. The detection of such subhalos would have implications for dark matter and cosmological models that predict modifications to the halo-mass function at low halo masses. We develop an analytic formalism for describing the perturbed stellar phase-space distributions, and we demonstrate through idealized simulations the ability to detect subhalos using the phase-space model and a likelihood framework. Our method complements existing methods for low-mass subhalo searches, such as searches for gaps in stellar streams, in that we can localize the positions and velocities of the subhalos today.

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DSpace at MIT  


Buschmann, Malte -  Kopp, Joachim -  Safdi, Benjamin R. -  Wu, Chih -  Liang - 

Id.: 71340999

Idioma: inglés  - 

Versión: 1.0

Estado: Final

Tipo de recurso: Article  -  http://purl.org/eprint/type/JournalArticle  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.

Requerimientos técnicos:  Browser: Any - 

Relación: [IsBasedOn] American Physical Society
[References] http://dx.doi.org/10.1103/PhysRevLett.120.211101
[References] Physical Review Letters

Fecha de contribución: 27-may-2018


* 0031-9007
* 1079-7114
* Buschmann, Malte et al. "Stellar Wakes from Dark Matter Subhalos." Physical Review Letters 120, 21 (May 2018): 211101 © 2018 American Physical Society

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