Experimental astroparticle physics

Welcome to Jan Conrad's experimental astroparticle physics group.

We are currently focusing on astrophysical detection of particle dark matter.

One approach is called indirect detection of particle dark matter with gamma rays using the satellite Fermi Large Area Telescope (LAT) as well as the Imaging Air Cherenkov Telescope H.E.S.S.. We are also involved in preparations for the next generation Air Cherenkov Telescope Array CTA . Another way to look for particle dark matter is by detectors placed in deep underground mines, an approach dubbed direct detection. We are involved in the XENON programme as well as preparations for the next-to-next generation noble gas detector DARWIN

Current group members
Sara Algeri grad. student, statistics (jointly with D. v. Dyk, Imperial College London)
Brandon Anderson postdoc (Fermi)
Jakob Calven grad. student (XENON)
Andrea Chiappo grad. student (Fermi)
Jan Conrad professor (CTA, Fermi, HESS, DARWIN, XENON1T)
Knut Dundas Morå grad. student (HESS/CTA)
Benjamin Farmer postdoc (GAMBIT, direct detection)
Alfredo Ferella researcher (XENON1T/DARWIN)
Joern Mahlstedt postdoc (XENON)
Manuel Meyer postdoc (CTA, HESS, Fermi)
Bart Pelssers grad. student (XENON)
Miguel Sánchez-Conde Wennergren Fellow, Fermi
Robert Wagner researcher (CTA, HESS)

Former members Stephan Zimmer grad. student (grad. student, defended 2015 --> Univ. Geneva) M. Garde Lindholm (grad.student, defended 2015) Christine Meurer (post-doc --> RWTH Aachen) Alexander Sellerholm (grad. student, defended 2010 --> industry) Tomi Ylinen (grad. student, defended 2010, --> industry) Zhaoyu Yang (post-doc --> Ohio State University) Antje Putze (OKC fellow --> RWTH Aachen--> Annecy) Joachim Ripken (post-doc --> MPI Solar Physics) Alessandro Cuoco (post-doc --> Torino --> Aachen ) Hugh Dickinson (post-doc --> Iowa State) Gregory Martinez (post-doc --> UCLA)

[Pubs with group members as lead authors] [Pubs with direct, significant contributions]

Publications since 2014 written in the group (i.e. at least one corresponding author from the group)

  1. CTA in the Context of Searches for Particle Dark Matter - a glimpse
    J. Conrad
    Invited contribtution. In: Procceedings of 6th International Symposium on High-Energy Gamma-Ray Astronomy (Gamma 2016) arxiv:1609.02350 [astro-ph.HE]

  2. The Fermi Large Area Telescope as a Galactic Supernovae Axionscope
    M. Meyer, M. Giannotti, A. Mirizzi, J. Conrad, M. Sanchez-Conde
    submitted to PRL arxiv:1609.02350 [astro-ph.HE]

  3. H.E.S.S. limits on line-like dark matter signatures in the 100 GeV to 2 TeV energy range close to the Galactic Centre
    H. Abdalla et al. [HESS]
    Phys.Rev.Lett. 117 (2016) no.15, 151302 arxiv:1609.08091 [astro-ph.HE]

  4. Dwarf spheroidal J-factors without priors: A likelihood-based analysis for indirect dark matter searches
    A. Chiappo, J. Cohen-Tanugi, J. Conrad, L. Strigari, M. Sanchez-Conde, B. Anderson
    submitted to MNRAS arxiv:1608.07111 [astro-ph.HE]

  5. Search for Spectral Irregularities due to Photon–Axionlike-Particle Oscillations with the Fermi Large Area Telescope
    M. Ajello et al. [Fermi-LAT]
    Phys.Rev.Lett. 116 (2016) no.16, 161101 arxiv:1603.06978 [astro-ph.HE]

  6. Characterization of subhalo structural properties and implications for dark matter annihilation signals
    A. Moline, M. Sanchez-Conde, S. Palomares-Ruiz, F. Prada
    submitted to MNRAS arxiv:1603.040057[astro-ph.HE]

  7. Sensitivity of the Cherenkov Telescope Array to the Detection of Intergalactic Magnetic Fields
    M. Meyer, J. Conrad, H. Dickinson
    Astrophys.J. 827 (2016) no.2, 147 arxiv:1603.03431 [astro-ph.HE]

  8. On methods for correcting the look-elsewhere effect in searches for new physics
    S. Algeri, J. Conrad, D. v. Dyk
    submitted to JINST arxiv:1602.00091 [astro-ph.HE]

  9. Constraints on Axions and Axionlike Particles from Fermi Large Area Telescope Observations of Neutron Stars
    B. Berenji, J. Gaskins, M. Meyer
    Phys. Rev. D93 (2016) 045019 arxiv:1602.00091 [astro-ph.HE]

  10. Dark Matter Searches with H.E.S.S.
    K. Mora [HESS]
    Proceedings of 27th Rencontres de Blois, 2015 arxiv:1512.00698 [astro-ph.HE]

  11. Search for Gamma-Ray Lines towards Galaxy Clusters with the Fermi-LAT
    B. Anderson, S. Zimmer, J. Conrad, M. Gustafsson, M. Sanchez-Conde, R. Caputo
    JCAP 1602 (2016) 02 026 arxiv:1511.00014 [astro-ph.HE]

  12. Search for gamma-ray emission from the Coma Cluster with six years of Fermi-LAT data
    M. Ackermann et al. [Fermi-LAT]
    ApJ 819 (2016) 2 149 arxiv:1507.08995 [astro-ph.HE]

  13. Search for extended gamma-ray emission from the Virgo galaxy cluster with Fermi-LAT
    M. Ackermann et al. [Fermi-LAT]
    Astrophys.J. 812 (2015) 2, 159 arxiv:1510.00004 [astro-ph.HE]

  14. Search for Gamma-ray Line Signatures with H.E.S.S
    M. Kieffer, K. Mora, J. Conrad, C. Farnier, A, Jacholkowska, J. Veh, A. Viana [HESS]
    Proceedings of ICRC 2015 arxiv:1509.03514 [astro-ph.HE]

  15. Comparing non-nested models in the search for new physics
    S. Algeri, J. Conrad, D.A. van Dyk
    accepted by MNRAS Letters arxiv:1509.01010 [physics.data-an]

  16. Dark Matter Searches with the Fermi-LAT in the Direction of Dwarf Spheroidals
    M. Wood, B. Anderson, A. Drlica-Wagner, J. Cohen-Tanugi, J. Conrad [Fermi-LAT]
    Proceedings of ICRC 2015 arxiv:1507.03530 [astro-ph.HE]

  17. WIMP searches with gamma rays in the Fermi era: challenges, methods and results
    J. Conrad, J. Cohen-Tanugi, L. E. Strigari
    JETP Vol. 148 (12) (2015) arxiv:1503.06348 [astro-ph.HE]

  18. Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with 6 years of Fermi of Fermi-LAT data
    M. Ackermann et al. [Fermi-LAT]
    Phys. Rev. Lett. 115 (2015) 23, 231301 arxiv:1503.02641 [astro-ph.HE]

  19. Significance in Gamma ray astronomy with Systematic Errors
    G. Spengler
    Astropart.Phys. 67 (2015) 70-74 arxiv:1502.03249 [astro-ph.HE],

  20. Constraints on an Annihilation Signal from a Core of Constant Dark Matter Density around the Milky Way Center with H.E.S.S.
    A. Abramowski et al. [H.E.S.S.]
    Phys.Rev.Lett. 114 (2015) 8, 081301 arxiv:1502.03244 [astro-ph.HE],

  21. Using Likelihood for Combined Data Set Analysis
    B. Anderson et al. [Fermi-LAT]
    presented at Fermi Symposium, Nagoya, 2014 arxiv:1502.03081 [astro-ph.HE],

  22. Limits on Dark Matter Annihilation Signals from the Fermi LAT 4-year Measurement of the Isotropic Gamma-Ray Background
    M. Ackermann et al. [Fermi-LAT]
    JCAP 1509 (2015) 09, 008 arxiv:1501.05464 [astro-ph.HE],

  23. The nature of the Diffuse Gamma-Ray Background
    M. Fornasa, M.A.Sanchez-Conde
    Phys. Rept. 598 (2015) 1-58 arxiv:1502.02866 [astro-ph.HE]

  24. The Origin of the Extragalactic Gamma-Ray Background and Implications for Dark-Matter Annihilation>
    M. Ajello, D. Gasparrini, M. Sanchez-Conde et al.
    Astrophys.J. 800 (2015) 2, L27 arxiv:1501.05301 [astro-ph.HE],

  25. Modelling gamma-ray-axion-like particle oscillations in turbulent magnetic fields: relevance for observations with Cherenkov telescopes
    M. Meyer
    Contribution to 10th PATRAS workshop, CERN, 2014, arXiv:1412.2492 [hep-ph],

  26. Indirect Detection of WIMP Dark Matter: a compact review
    J. Conrad
    Invited contribution, IPAP 2014, University College London, 2014 , arXiv:1411.1925 [hep-ph],

  27. Search for dark matter annihiliation signatures in H.E.S.S. observations of Dwarf Spheroidal Galaxies
    A. Abramowski et. al [H.E.S.S.]
    Phys.Rev. D90 (2014) 11, 112012, arXiv:1410.2589 [astro-ph],

  28. Sensitivity of the Cherenkov Telescope Array to the detection of axion-like particles at high gamma-ray opacities
    M. Meyer, J. Conrad
    JCAP12(2014)016, arXiv:1410.1556 [astro-ph],

  29. Statistical Issues in Astrophysical Searches for Particle Dark Matter
    J. Conrad
    Invited review, Astroparticle Physics 62 (2014) 165-177 , arXiv:1407.6617 [astro-ph],

  30. On detecting oscillations of gamma rays into axion-like particle in turbulent and coherent magnetic fields
    M. Meyer, D. Montanino, J. Conrad
    JCAP 1409 (2014) 003, arXiv:1406.5972 [astro-ph],

  31. The sensitivity of Cherenkov telescopes to dark matter and astrophysical anisotropies in the diffuse gamma-ray background
    J. Ripken, A. Cuoco, H.-S. Zechlin, J. Conrad, D. Horns
    JCAP 1401 (2014) 01, arXiv:1211.6922 [astro-ph],

  32. Dark Matter Constraints from Observations of 25 Milky Way Satellite Galaxies with the Fermi Large Area Telescope
    M. Ackermann et. al [Fermi-LAT]
    Phys. Rev. D89 (2014) 042001, arXiv:1308.0828 [astro-ph], PHYSICS Synopsis

  33. A Robust Determination of Milky Way Satellite Properties using Hierarchical Mass Modelling
    G. Martinez
    Month.Not.Roy.Astron.Soc 451 (2015) 3, 2523-2535, arXiv:1310.2641 [astro-ph],

  34. Search for cosmic-ray induced gamma-ray emission in Galaxy Clusters
    M. Ackermann et. al [Fermi-LAT]
    Astrophys.J. 787 (2014) 18, arXiv:1308.5654 [astro-ph],

  35. Publications since 2015 with direct signficant contribution

  36. XENON100 Dark Matter Results from a Combination of 477 Live Days
    E. Aprile et al. [XENON], including Calven, Conrad, Ferella, Pelssers
    submited to Phys. Rev. D. arxiv:1605.06154 [astro-ph.HE]

  37. Sensitivity Projections for Dark Matter Searches with the Fermi-Large Area Telescope
    E. Charles et al. (incl. Anderson, Meyer, Sanchez-Conde, Zimmer)
    Phys. Rept. 636 (2016) 1-46 arxiv:1605.02016 [astro-ph.HE]

  38. 3FGL Demographics Outside the Galactic Plane using Supervised Machine Learning: Pulsar and Dark MAtter Subhalo Interpretations
    N. Mirabal eet al. (incl. Sanchez-Conde)
    Astrophys.J. 825 (2016) no.1, 69 arxiv:1605.00711 [astro-ph.HE]

  39. The angular power spectrum of the diffuse gamma-ray emission as measured by the Fermi Large Area Telescope and constraints on its Dark Matter interpretation
    M. Fornasa et al. (incl. Sanchez-Conde)
    submitted to Phys. Rev. D. arxiv:1601.06590 [astro-ph.HE]

  40. Limits to dark matter annihilation cross-section from a combined analysis of MAGIC and Fermi-LAT observations of dwarf satellite galaxies
    M.Ahnen et al (incl. Anderson, Sanchez-Conde)
    accepted by ApJ arxiv:1601.06590 [astro-ph.HE]

  41. Physics reach of the XENON1T dark matter experiment
    E. Aprile et al [XENON] (including Conrad, Pelssers, Ferella)
    submitted to JCAP arxiv:1512.07501 [astro-ph.HE]

  42. A. Drlica-Wagner at al [Fermi-LAT, DES], incl. Anderson, Sanchez-Conde
    M.Ahnen et al (incl. Anderson, Sanchez-Conde)
    Astrophys.J. 809 (2015) 1, L4 arxiv:1503.02632 [astro-ph.HE]
  43. Last update: October, 2016