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Title:Two-integral distribution functions in axisymmetric galaxies: Implications for dark matter searches
Authors:ID Petač, Mihael (Author)
ID Ullio, Piero (Author)
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Language:English
Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:We address the problem of reconstructing the phase-space distribution function for an extended collisionless system, with known density profile and in equilibrium within an axisymmetric gravitational potential. Assuming that it depends on only two integrals of motion, namely the energy and the component of the angular momentum along the axis of symmetry Lz , there is a one-to-one correspondence between the density profile and the component of the distribution function that is even in Lz, as well as between the weighted azimuthal velocity profile and the odd component. This inversion procedure was originally proposed by Lynden-Bell and later refined in its numerical implementation by Hunter and Qian; after overcoming a technical difficulty, we apply it here for the first time in presence of a strongly flattened component, as a novel approach of extracting the phase-space distribution function for dark matter particles in the halo of spiral galaxies. We compare results obtained for realistic axisymmetric models to those in the spherical symmetric limit as assumed in previous analyses, showing the rather severe shortcomings in the latter. We then apply the scheme to the Milky Way and discuss the implications for the direct dark matter searches. In particular, we reinterpret the null results of the Xenon1T experiment for spin-(in)dependent interactions and make predictions for the annual modulation of the signal for a set of axisymmetric models, including a self-consistently defined corotating halo.
Keywords:dark matter, astrophysics of galaxies, high energy physics, phenomenology
Year of publishing:2019
Number of pages:str. 1-20
Numbering:Vol. 99, no. 4
PID:20.500.12556/RUNG-6831 New window
COBISS.SI-ID:78759427 New window
UDC:524
ISSN on article:2470-0010
DOI:10.1103/PhysRevD.99.043003 New window
NUK URN:URN:SI:UNG:REP:W4M1CQYC
Publication date in RUNG:01.10.2021
Views:3086
Downloads:0
Metadata:XML DC-XML DC-RDF
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PETAČ, Mihael and ULLIO, Piero, 2019, Two-integral distribution functions in axisymmetric galaxies: Implications for dark matter searches. Physical review [online]. 2019. Vol. 99, no. 4, p. 1–20. [Accessed 11 April 2025]. DOI 10.1103/PhysRevD.99.043003. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=6831
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Record is a part of a journal

Title:Physical review
Shortened title:Phys. rev., D
Publisher:American Physical Society
ISSN:2470-0010
COBISS.SI-ID:29757223 New window

Document is financed by a project

Funder:EC - European Commission
Funding programme:H2020
Project number:674896

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