NuSTAR Tests of Sterile-Neutrino Dark Matter: New Galactic Bulge Observations and Combined Impact

We analyze two dedicated NuSTAR observations with exposure ∼190 ks located ∼10° from the Galactic plane, one above and the other below, to search for x-ray lines from the radiative decay of sterile-neutrino dark matter. These fields were chosen to minimize astrophysical x-ray backgrounds while remaining near the densest region of the dark matter halo. We find no evidence of anomalous x-ray lines in the energy range 5–20 keV, corresponding to sterile neutrino masses 10–40 keV. Interpreted in the context of sterile neutrinos produced via neutrino mixing, these observations provide the leading constraints in the mass range 10–12 keV, improving upon previous constraints in this range by a factor ∼2. We also compare our results to Monte Carlo simulations, showing that the fluctuations in our derived limit are not dominated by systematic effects. An updated model of the instrumental background, which is currently under development, will improve NuSTAR’s sensitivity to anomalous x-ray lines, particularly for energies 3–5 keV.

Note:

16 pages, 5 figures. Text updated to match published version in PRD. Conclusions unchanged

Astrophysics and astroparticle physics
neutrino: sterile: mass
dark matter: halo
dark matter: annihilation
dark matter: decay
neutrino: mixing
numerical calculations: Monte Carlo
electron positron
energy resolution
anti-p

References(134)

Figures(6)

[1]

Review of Particle Physics

M. Tanabashi
(
- Nagoya U. and
- KMI, Nagoya
)
,
K. Hagiwara
(
- KEK, Tsukuba
)
,
K. Hikasa
(
- Tohoku U.
)
,
K. Nakamura
(
- Tokyo U., IPMU and
- KEK, Tsukuba
)
,
Y. Sumino
(
- Tohoku U.
)

et al.

- Phys.Rev.D 98 (2018) 3, 030001
•
DOI:
- 10.1103/PhysRevD.98.030001

[2]

Particle dark matter: Evidence, candidates and constraints

- Phys.Rept. 405 (2005) 279-390
•
e-Print:
- hep-ph/0404175
•
DOI:
- 10.1016/j.physrep.2004.08.031

[3]

Galactic Searches for Dark Matter

Louis E. Strigari
(
- KIPAC, Menlo Park
)

- Phys.Rept. 531 (2013) 1-88
•
e-Print:
- 1211.7090
•
DOI:
- 10.1016/j.physrep.2013.05.004

[4]

Dark Matter in the Universe

M.S. Seigar

[5]

Gravitational probes of dark matter physics

Matthew R. Buckley
(
- Rutgers U., Piscataway
)
,
Annika H. G. Peter
(
)

- Phys.Rept. 761 (2018) 1-60
•
e-Print:
- 1712.06615
•
DOI:
- 10.1016/j.physrep.2018.07.003

[6]

Planck 2018 results. VI. Cosmological parameters

Planck

Collaboration

•

N. Aghanim
(
- Orsay, IAS
)

et al.

- Astron.Astrophys. 641 (2020) A6,
- Astron.Astrophys. 652 (2021) C4 (erratum)
•
e-Print:
- 1807.06209
•
DOI:
- 10.1051/0004-6361/201833910

[7]

The Connection between Galaxies and their Dark Matter Halos

Risa H. Wechsler
(
- KIPAC, Menlo Park and
- SLAC
)
,
Jeremy L. Tinker
(
- New York U., CCPP
)

- Ann.Rev.Astron.Astrophys. 56 (2018) 435-487
•
e-Print:
- 1804.03097
•
DOI:
- 10.1146/annurev-astro-081817-051756

[8]

A review of indirect searches for particle dark matter

Jennifer M. Gaskins
(
- Caltech
)

- Contemp.Phys. 57 (2016) 4, 496-525
•
e-Print:
- 1604.00014
•
DOI:
- 10.1080/00107514.2016.1175160

[9]

The nuMSM, dark matter and neutrino masses

Takehiko Asaka
(
- IPT, Lausanne
)
,
Steve Blanchet
(
- IPT, Lausanne
)
,
Mikhail Shaposhnikov
(
- IPT, Lausanne
)

- Phys.Lett.B 631 (2005) 151-156
•
e-Print:
- hep-ph/0503065
•
DOI:
- 10.1016/j.physletb.2005.09.070

[10]

Lightest sterile neutrino abundance within the nuMSM

Takehiko Asaka
(
- ITPP, Lausanne
)
,
Mikko Laine
(
- Bielefeld U.
)
,
Mikhail Shaposhnikov
(
- IPT, Lausanne
)

- JHEP 01 (2007) 091,
- JHEP 02 (2015) 028 (erratum)
•
e-Print:
- hep-ph/0612182
•
DOI:
- 10.1088/1126-6708/2007/01/091

[10]

Lightest sterile neutrino abundance within the nuMSM

Takehiko Asaka
(
- ITPP, Lausanne
)
,
Mikko Laine
(
- Bielefeld U.
)
,
Mikhail Shaposhnikov
(
- IPT, Lausanne
)

- JHEP 01 (2007) 091,
- JHEP 02 (2015) 028 (erratum)
•
e-Print:
- hep-ph/0612182
•
DOI:
- 10.1088/1126-6708/2007/01/091

[11]

Dark Matter, Baryogenesis and Neutrino Oscillations from Right Handed Neutrinos

Laurent Canetti
(
- Ecole Polytechnique, Lausanne and
- IPT, Lausanne
)
,
Marco Drewes
(
- Aachen, Tech. Hochsch. and
- Munich, Tech. U.
)
,
Tibor Frossard
(
- Heidelberg, Max Planck Inst.
)
,
Mikhail Shaposhnikov
(
- Ecole Polytechnique, Lausanne
)

- Phys.Rev.D 87 (2013) 093006
•
e-Print:
- 1208.4607
•
DOI:
- 10.1103/PhysRevD.87.093006

[12]

Sterile Neutrinos as the Origin of Dark and Baryonic Matter

Laurent Canetti
(
- ITPP, Lausanne
)
,
Marco Drewes
(
- Munich, Tech. U. and
- RWTH Aachen U.
)
,
Mikhail Shaposhnikov
(
- ITPP, Lausanne
)

- Phys.Rev.Lett. 110 (2013) 6, 061801
•
e-Print:
- 1204.3902
•
DOI:
- 10.1103/PhysRevLett.110.061801

[13]

Sterile neutrinos: The Dark side of the light fermions

Alexander Kusenko
(
- Tokyo U., IPMU and
- UCLA
)

- Phys.Rept. 481 (2009) 1-28
•
e-Print:
- 0906.2968
•
DOI:
- 10.1016/j.physrep.2009.07.004

[14]

A White Paper on keV Sterile Neutrino Dark Matter

M. Drewes
(
- Munich, Tech. U.
)
,
T. Lasserre
(
- Munich, Tech. U.
)
,
A. Merle
(
- Munich, Max Planck Inst.
)
,
S. Mertens
(
- LBL, Berkeley and
- KIT, Karlsruhe
)
,
R. Adhikari
(
- Jamia Millia Islamia
)

et al.

- JCAP 01 (2017) 025
•
e-Print:
- 1602.04816
•
DOI:
- 10.1088/1475-7516/2017/01/025

[15]

Sterile neutrinos in cosmology

Kevork N. Abazajian
(
- UC, Irvine
)

- Phys.Rept. 711-712 (2017) 1-28,
- Physics Reports, Volumes 711-712, 10 November 2017, Pages 1-28
•
e-Print:
- 1705.01837
•
DOI:
- 10.1016/j.physrep.2017.10.003

[16]

Sterile neutrino Dark Matter

A. Boyarsky
(
- Leiden U.
)
,
M. Drewes
(
- Louvain U., CP3 and
- Munich, Tech. U., Universe
)
,
T. Lasserre
(
- IRFU, Saclay and
- TUM-IAS, Munich and
- Munich, Tech. U. and
- APC, Paris
)
,
S. Mertens
(
- Munich, Tech. U. and
- Munich, Max Planck Inst.
)
,
O. Ruchayskiy
(
- LBL, Berkeley
)

- Prog.Part.Nucl.Phys. 104 (2019) 1-45
•
e-Print:
- 1807.07938
•
DOI:
- 10.1016/j.ppnp.2018.07.004

[17]

Decay l0 ---> nu(lepton) gamma in gauge theories of weak and electromagnetic interactions

R. Shrock
(
- Princeton U.
)

- Phys.Rev.D 9 (1974) 743-748
•
DOI:
- 10.1103/PhysRevD.9.743

[18]

Radiative Decays of Massive Neutrinos

- Phys.Rev.D 25 (1982) 766
•
DOI:
- 10.1103/PhysRevD.25.766

[19]

Massive sterile neutrinos as warm dark matter

A.D. Dolgov
(
- Moscow, ITEP
)
,
S.H. Hansen
(
- INFN, Ferrara
)

- Astropart.Phys. 16 (2002) 339-344
•
e-Print:
- hep-ph/0009083
•
DOI:
- 10.1016/S0927-6505(01)00115-3

[20]

Direct detection of warm dark matter in the X-ray

Kevork Abazajian
(
- UC, San Diego and
- San Diego, CASS
)
,
George M. Fuller
(
- UC, San Diego and
- San Diego, CASS
)
,
Wallace H. Tucker
(
)

- Astrophys.J. 562 (2001) 593-604
•
e-Print:
- astro-ph/0106002
•
DOI:
- 10.1086/323867

[21]

Sterile-neutrinos as dark matter

- Phys.Rev.Lett. 72 (1994) 17-20,
- Phys. Rev. Lett. 72 (1994) 17-20. and Fermilab Batavia - FERMILAB-Pub-93-057 (93/03,rec.Apr.) 11 p. C
•
e-Print:
- hep-ph/9303287
•
DOI:
- 10.1103/PhysRevLett.72.17

[22]

A New dark matter candidate: Nonthermal sterile neutrinos

Xiang-Dong Shi
(
- UC, San Diego
)
,
George M. Fuller
(
- UC, San Diego
)

- Phys.Rev.Lett. 82 (1999) 2832-2835
•
e-Print:
- astro-ph/9810076
•
DOI:
- 10.1103/PhysRevLett.82.2832

[23]

Cosmological bounds on neutrino degeneracy improved by flavor oscillations

A.D. Dolgov
(
- INFN, Ferrara and
- Moscow, ITEP
)
,
S.H. Hansen
(
- Oxford U.
)
,
S. Pastor
(
- Munich, Max Planck Inst.
)
,
S.T. Petcov
(
- SISSA, Trieste and
- INFN, Trieste and
- Sofiya, Inst. Nucl. Res.
)
,
G.G. Raffelt
(
- Munich, Max Planck Inst.
)

et al.

- Nucl.Phys.B 632 (2002) 363-382
•
e-Print:
- hep-ph/0201287
•
DOI:
- 10.1016/S0550-3213(02)00274-2

[24]

Lepton asymmetry and primordial nucleosynthesis in the era of precision cosmology

- Phys.Rev.D 71 (2005) 127301
•
e-Print:
- astro-ph/0506162
•
DOI:
- 10.1103/PhysRevD.71.127301

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