Implications of High-Resolution Simulations on Indirect Dark Matter Searches - INSPIRE

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Implications of High-Resolution Simulations on Indirect Dark Matter Searches

Lidia Pieri
(
- Paris, Inst. Astrophys.
)
,
Julien Lavalle
(
- Turin U. and
- INFN, Turin
)
,
Gianfranco Bertone
(
- Paris, Inst. Astrophys.
)
,
Enzo Branchini
(
- Rome U.
)

Aug, 2009

19 pages

Published in:

Phys.Rev.D 83 (2011) 023518

e-Print:

0908.0195 [astro-ph.HE]

DOI:

10.1103/PhysRevD.83.023518

Report number:

DFTT-50-2009

View in:

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Abstract: (arXiv)

We study the prospects for detecting the annihilation products of Dark Matter [DM] in the framework of the two highest-resolution numerical simulations currently available, i.e. {\it Via Lactea II} and {\it Aquarius}. We propose a strategy to determine the shape and size of the region around the Galactic center that maximizes the probability of observing a DM signal, and we show that although the predicted flux can differ by a factor of 10 for a given DM candidate in the two simulation setups, the search strategy remains actually unchanged, since it relies on the angular profile of the annihilation flux, not on its normalization. We present mock gamma-ray maps that keep into account the diffuse emission produced by unresolved halos in the Galaxy, and we estimate that in an optimistic DM scenario a few individual clumps can be resolved above the background with the Fermi-LAT. Finally we calculate the energy-dependent boost factors for positrons and antiprotons, and show that they are always of

\cal O

(1), and therefore they cannot lead to the large enhancements of the antimatter fluxes required to explain the recent PAMELA, ATIC, Fermi and HESS data.

Note:

23 pages, 15 figures, revised version (e.g. more insights on the spatial distribution of subhalos)

98.35.Gi
98.70.Sa
95.35.+d
95.30.Cq
dark matter: annihilation
galaxy
antimatter: flux
cosmic radiation: positron
gamma ray: flux
anti-p: cosmic radiation

References(108)

Figures(0)

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Oscar Adriani
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- Florence U. and
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)

et al.

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et al.

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Dan Hooper
(
- Chicago U., Astron. Astrophys. Ctr. and
- Fermilab
)
,
Pasquale Blasi
(
- Arcetri Observ. and
- Fermilab and
- Gran Sasso
)
,
Pasquale Dario Serpico
(
- CERN and
- Fermilab
)

- JCAP 01 (2009) 025
•
e-Print:
- 0810.1527
•
DOI:
- 10.1088/1475-7516/2009/01/025

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Pasquale Blasi
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Inhomogeneity in the Supernova Remnants as a Natural Explanation of the PAMELA/ATIC Observations

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TeV Gamma Rays from Geminga and the Origin of the GeV Positron Excess

Hasan Yuksel
(
- Delaware U., Bartol Inst. and
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)
,
Matthew D. Kistler
(
- Ohio State U., CCAPP and
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)
,
Todor Stanev
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)

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Model-independent implications of the e+-, anti-proton cosmic ray spectra on properties of Dark Matter

Marco Cirelli
(
- Saclay, SPhT
)
,
Mario Kadastik
(
- NICPB, Tallinn
)
,
Martti Raidal
(
- NICPB, Tallinn
)
,
Alessandro Strumia
(
- Pisa U. and
- INFN, Pisa
)

- Nucl.Phys.B 813 (2009) 1-21,
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•
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Gamma-ray and radio tests of the e+e- excess from DM annihilations

Gianfranco Bertone
(
- Paris, Inst. Astrophys.
)
,
Marco Cirelli
(
- DSM, DAPNIA, Saclay
)
,
Alessandro Strumia
(
- Pisa U.
)
,
Marco Taoso
(
- Paris, Inst. Astrophys. and
- INFN, Padua
)

- JCAP 03 (2009) 009
•
e-Print:
- 0811.3744
•
DOI:
- 10.1088/1475-7516/2009/03/009

Gamma-ray and Radio Constraints of High Positron Rate Dark Matter Models Annihilating into New Light Particles

Lars Bergström
(
- Stockholm U. and
- Stockholm U., OKC
)
,
Gianfranco Bertone
(
- Paris, Inst. Astrophys.
)
,
Torsten Bringmann
(
- Stockholm U. and
- Stockholm U., OKC
)
,
Joakim Edsjö
(
- Stockholm U. and
- Stockholm U., OKC
)
,
Marco Taoso
(
- Paris, Inst. Astrophys. and
- INFN, Padua
)

- Phys.Rev.D 79 (2009) 081303
•
e-Print:
- 0812.3895
•
DOI:
- 10.1103/PhysRevD.79.081303

Multi-messenger constraints on the annihilating dark matter interpretation of the positron excess

Miguel Pato
(
- Paris, Inst. Astrophys. and
- Diderot U., Paris
)
,
Lidia Pieri
(
- Paris, Inst. Astrophys.
)
,
Gianfranco Bertone
(
- Paris, Inst. Astrophys. and
- Paris U., VI-VII
)

- Phys.Rev.D 80 (2009) 103510
•
e-Print:
- 0905.0372
•
DOI:
- 10.1103/PhysRevD.80.103510

The Contribution Of Inverse Compton Scattering To The Diffuse Extragalactic Gamma-Ray Background From Annihilating Dark Matter

Alexander V. Belikov
(
- Chicago U.
)
,
Dan Hooper
(
- Fermilab and
- Chicago U., Astron. Astrophys. Ctr.
)

- Phys.Rev.D 81 (2010) 043505
•
e-Print:
- 0906.2251
•
DOI:
- 10.1103/PhysRevD.81.043505

Extragalactic Inverse Compton Light from Dark Matter Annihilation and the Pamela Positron Excess

Stefano Profumo
(
- UC, Santa Cruz
)
,
Tesla E. Jeltema
(
- Lick Observ.
)

- JCAP 07 (2009) 020
•
e-Print:
- 0906.0001
•
DOI:
- 10.1088/1475-7516/2009/07/020

Thermal Relics in Modified Cosmologies: Bounds on Evolution Histories of the Early Universe and Cosmological Boosts for PAMELA

R. Catena
(
- Heidelberg U.
)
,
N. Fornengo
(
- Turin U. and
- INFN, Turin
)
,
M. Pato
(
- Padua U. and
- Paris, Inst. Astrophys. and
- APC, Paris
)
,
L. Pieri
(
- Padua U. and
- INFN, Padua
)
,
A. Masiero
(
- Padua U. and
- INFN, Padua
)

- Phys.Rev.D 81 (2010) 123522
•
e-Print:
- 0912.4421
•
DOI:
- 10.1103/PhysRevD.81.123522

Secondary radiation from the Pamela/ATIC excess and relevance for Fermi

E. Borriello
(
- INFN, Naples and
- Naples U.
)
,
A. Cuoco
(
- Aarhus U.
)
,
G. Miele
(
- INFN, Naples and
- Naples U.
)

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•
e-Print:
- 0903.1852
•
DOI:
- 10.1088/0004-637X/699/2/L59

CMB constraints on Dark Matter models with large annihilation cross-section

Silvia Galli
(
- APC, Paris and
- INFN, Rome
)
,
Fabio Iocco
(
- Saclay, SPhT and
- Paris, Inst. Astrophys.
)
,
Gianfranco Bertone
(
- Paris, Inst. Astrophys.
)
,
Alessandro Melchiorri
(
- INFN, Rome
)

- Phys.Rev.D 80 (2009) 023505
•
e-Print:
- 0905.0003
•
DOI:
- 10.1103/PhysRevD.80.023505

CMB Constraints on WIMP Annihilation: Energy Absorption During the Recombination Epoch

- Phys.Rev.D 80 (2009) 043526
•
e-Print:
- 0906.1197
•
DOI:
- 10.1103/PhysRevD.80.043526

Constraints on Dark Matter annihilations from reionization and heating of the intergalactic gas

Marco Cirelli
(
- Saclay, SPhT
)
,
Fabio Iocco
(
- Saclay, SPhT and
- Paris, Inst. Astrophys.
)
,
Paolo Panci
(
- Saclay, SPhT and
- L'Aquila U. and
- Diderot U., Paris
)

- JCAP 10 (2009) 009
•
e-Print:
- 0907.0719
•
DOI:
- 10.1088/1475-7516/2009/10/009

Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope

Fermi-LAT

Collaboration

•

Aous A. Abdo
(
- Naval Research Lab, Wash., D.C.
)

et al.

- Phys.Rev.Lett. 102 (2009) 181101
•
e-Print:
- 0905.0025
•
DOI:
- 10.1103/PhysRevLett.102.181101

Probing the ATIC peak in the cosmic-ray electron spectrum with H.E.S.S

H.E.S.S.

Collaboration

•

F. Aharonian
(
- Heidelberg, Max Planck Inst. and
- Dublin Inst.
)

et al.

- Astron.Astrophys. 508 (2009) 561
•
e-Print:
- 0905.0105
•
DOI:
- 10.1051/0004-6361/200913323

Observability of gamma-rays from dark matter neutralino annihilations in the Milky Way halo

Lars Bergstrom
(
- Stockholm U.
)
,
Piero Ullio
(
- Stockholm U.
)
,
James H. Buckley
(
- Washington U., St. Louis
)

- Astropart.Phys. 9 (1998) 137-162
•
e-Print:
- astro-ph/9712318
•
DOI:
- 10.1016/S0927-6505(98)00015-2

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