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Search for Photon-Linelike Signatures from Dark Matter Annihilations with H.E.S.S

Abramowski, A.; Acero, F.; Aharonian, F.; Akhperjanian, A.G.; Anton, G.; Balenderan, S.; Balzer, A.; Barnacka, A.; Becherini, Y.; Becker Tjus, J.; Bernlöhr, K.; Birsin, E.; Biteau, J.; Bochow, A.; Boisson, C.; Bolmont, J.; Bordas, P.; Brucker, J.; Brun, F.; Brun, P.; Bulik, T.; Carrigan, S.; Casanova, S.; Cerruti, M.; Chadwick, P.M.; Chaves, R.C.G.; Cheesebrough, A.; Colafrancesco, S.; Cologna, G.; Conrad, J.; Couturier, C.; Dalton, M.; Daniel, M.K.; Davids, I.D.; Degrange, B.; Deil, C.; deWilt, P.; Dickinson, H.J.; Djannati-Ataï, A.; Domainko, W.; Drury, L.O'C.; Dubus, G.; Dutson, K.; Dyks, J.; Dyrda, M.; Egberts, K.; Eger, P.; Espigat, P.; Fallon, L.; Farnier, C.; Fegan, S.; Feinstein, F.; Fernandes, M.V.; Fernandez, D.; Fiasson, A.; Fontaine, G.; Förster, A.; Füßling, M.; Gajdus, M.; Gallant, Y.A.; Garrigoux, T.; Gast, H.; Giebels, B.; Glicenstein, J.F.; Glück, B.; Göring, D.; Grondin, M.-H.; Häffner, S.; Hague, J.D.; Hahn, J.; Hampf, D.; Harris, J.; Heinz, S.; Heinzelmann, G.; Henr...

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Authors

A. Abramowski

F. Acero

F. Aharonian

A.G. Akhperjanian

G. Anton

S. Balenderan

A. Balzer

A. Barnacka

Y. Becherini

J. Becker Tjus

K. Bernlöhr

E. Birsin

J. Biteau

A. Bochow

C. Boisson

J. Bolmont

P. Bordas

J. Brucker

F. Brun

P. Brun

T. Bulik

S. Carrigan

S. Casanova

M. Cerruti

R.C.G. Chaves

A. Cheesebrough

S. Colafrancesco

G. Cologna

J. Conrad

C. Couturier

M. Dalton

M.K. Daniel

I.D. Davids

B. Degrange

C. Deil

P. deWilt

H.J. Dickinson

A. Djannati-Ataï

W. Domainko

L.O'C. Drury

G. Dubus

K. Dutson

J. Dyks

M. Dyrda

K. Egberts

P. Eger

P. Espigat

L. Fallon

C. Farnier

S. Fegan

F. Feinstein

M.V. Fernandes

D. Fernandez

A. Fiasson

G. Fontaine

A. Förster

M. Füßling

M. Gajdus

Y.A. Gallant

T. Garrigoux

H. Gast

B. Giebels

J.F. Glicenstein

B. Glück

D. Göring

M.-H. Grondin

S. Häffner

J.D. Hague

J. Hahn

D. Hampf

J. Harris

S. Heinz

G. Heinzelmann

G. Henri

G. Hermann

A. Hillert

J.A. Hinton

W. Hofmann

P. Hofverberg

M. Holler

D. Horns

A. Jacholkowska

C. Jahn

M. Jamrozy

I. Jung

M.A. Kastendieck

K. Katarzyński

U. Katz

S. Kaufmann

B. Khélifi

S. Klepser

D. Klochkov

W. Kluźniak

T. Kneiske

N. Komin

K. Kosack

R. Kossakowski

F. Krayzel

P.P. Krüger

H. Laffon

G. Lamanna

J. Lefaucheur

M. Lemoine-Goumard

J.-P. Lenain

D. Lennarz

T. Lohse

A. Lopatin

C.-C. Lu

V. Marandon

A. Marcowith

J. Masbou

G. Maurin

N. Maxted

M. Mayer

T.J.L. McComb

M.C. Medina

J. Méhault

U. Menzler

R. Moderski

M. Mohamed

E. Moulin

C.L. Naumann

M. Naumann-Godo

M. de Naurois

D. Nedbal

D. Nekrassov

N. Nguyen

J. Niemiec

S. Ohm

E. de Oña Wilhelmi

B. Opitz

M. Ostrowski

I. Oya

M. Panter

R.D. Parsons

M. Paz Arribas

N.W. Pekeur

G. Pelletier

J. Perez

P.-O. Petrucci

B. Peyaud

S. Pita

G. Pühlhofer

M. Punch

A. Quirrenbach

M. Raue

A. Reimer

O. Reimer

M. Renaud

R. de los Reyes

F. Rieger

J. Ripken

L. Rob

S. Rosier-Lees

G. Rowell

B. Rudak

C.B. Rulten

V. Sahakian

D.A. Sanchez

A. Santangelo

R. Schlickeiser

A. Schulz

U. Schwanke

S. Schwarzburg

S. Schwemmer

F. Sheidaei

J.L. Skilton

H. Sol

G. Spengler

Ł Stawarz

R. Steenkamp

C. Stegmann

F. Stinzing

K. Stycz

I. Sushch

A. Szostek

J.-P. Tavernet

R. Terrier

M. Tluczykont

C. Trichard

K. Valerius

C. van Eldik

G. Vasileiadis

C. Venter

A. Viana

P. Vincent

H.J. Völk

F. Volpe

S. Vorobiov

M. Vorster

S.J. Wagner

R. White

A. Wierzcholska

D. Wouters

M. Zacharias

A. Zajczyk

A.A. Zdziarski

A. Zech

H.-S. Zechlin



Abstract

Gamma-ray line signatures can be expected in the very-high-energy (Eγ>100  GeV) domain due to self-annihilation or decay of dark matter (DM) particles in space. Such a signal would be readily distinguishable from astrophysical γ-ray sources that in most cases produce continuous spectra that span over several orders of magnitude in energy. Using data collected with the H.E.S.S. γ-ray instrument, upper limits on linelike emission are obtained in the energy range between ∼500  GeV and ∼25  TeV for the central part of the Milky Way halo and for extragalactic observations, complementing recent limits obtained with the Fermi-LAT instrument at lower energies. No statistically significant signal could be found. For monochromatic γ-ray line emission, flux limits of (2×10−7–2×10−5)  m−2 s−1 sr−1 and (1×10−8–2×10−6)  m−2 s−1 sr−1 are obtained for the central part of the Milky Way halo and extragalactic observations, respectively. For a DM particle mass of 1 TeV, limits on the velocity-averaged DM annihilation cross section ⟨σv⟩χχ→γγ reach ∼10−27  cm3 s−1, based on the Einasto parametrization of the Galactic DM halo density profile.

Citation

Abramowski, A., Acero, F., Aharonian, F., Akhperjanian, A., Anton, G., Balenderan, S., …Zechlin, H. (2013). Search for Photon-Linelike Signatures from Dark Matter Annihilations with H.E.S.S. Physical Review Letters, 110(4), Article 041301. https://doi.org/10.1103/physrevlett.110.041301

Journal Article Type Article
Publication Date Jan 1, 2013
Deposit Date Mar 25, 2013
Publicly Available Date Jul 11, 2014
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 110
Issue 4
Article Number 041301
DOI https://doi.org/10.1103/physrevlett.110.041301

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Copyright Statement
Reprinted with permission from the American Physical Society: Phys. Rev. Lett. 110, 041301 © (2013) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.






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