Cosmic radiation fields and search for dark matter
LEXI Young Investigator Group - University of Hamburg
Welcome!
Illustration of a dark star in the early universe. (Photo Credit: The University of Utah)
The cluster of excellence "Connecting Particles with the Cosmos" combines unique expertise on accelerator and detector physics, particle physics, astro- and astroparticle-physics with cosmology, string theory and mathematical physics in Hamburg. It aims at providing significant contributions to the worldwide research programme in particle physics, strengthening its connections to cosmology and exploring its implications on the fundamental laws of nature.
The young investigator group on "Cosmic radiation fields and search for dark matter in the early universe" investigates signatures of dark matter in diffuse radiation background fields produced in the early Universe. The group will also explore the complementarity of indirect searches with searches at colliders for new physics. Our research is done in close cooperation with astrophysics facilities, especially the Hamburg Observatory and the Astroparticle Physics Group at the University of Hamburg.
From Nov 9-12, 2010 we organized the workshop Cosmic Radiation Fields - Sources in the early Universe discussing the extragalactic infrared background resulting from sources in the early universe with a focus on the effect of dark matter on the early star formation.
News
2012
Our article on "Probing the peak of the star formation rate density with the extragalactic background light" just got published in the Monthly Notices of the Royal Astronomical Society. In the article recent contraints on the density of the extragalactic background light (EBL) are combined with a detailed phenomenological modeling of the emission of stars and dust in galaxies to derive contraints on the star formation rate density (SFRD). The article is available online at MNRAS or astro-ph.
Our paper on new constraints on the extragalactic background light using data from the Fermi satellite and ground based very high energy gamma-ray instruments has recently been published in Astronomy & Astrophysics.
The lectures have been broadcasted via the DESY webcast and the recordings of Manuel's and Martin's lecture can viewed below.
An exemplary phenomenon: the TeV-photon transparency of the universe - The environment: extragalactic background light (Martin Raue, Hamburg Uni.)
An exemplary phenomenon: the TeV-photon transparency of the universe - The observations: active galactic nuclei (Manuel Meyer, Hamburg Uni.)
space.com ran an article on our recent paper on dark matter powered stars and the extragalactic background light (see previous news item).
2011
The LEXI YIG actively participated in the DESY open house exhibition, helping to build Fermi satellite paper models, presenting and discussing their research with the general public, and hosting a live video feed to our collegues at the H.E.S.S. site in Namibia.
We had a change in management in our group: Tanja Kneiske moved to a position at the Frauenhofer Institut für Windenergie und Energiesystemtechnik. We wish her all the best at her new institute. Martin Raue will take over the group leader position of the LEXI YIG.
Martin Raue will be at the workshop "High Energy Phenomena in Relativistic Outflows III", talking about the detection of a VHE gamma-ray flare from the radio galaxy M 87 in 2010 and associated multi-wavelength observations.
The proceedings of our workshop Cosmic Radiation Fields - Sources in the early Universe have been published in the Proceedings of Science.
Tanja Kneiske and Martin Raue will be at the workshop "Beamed and Un-Beamed Gamma-Rays from Galaxies" in Muonio, Finland speaking about the extragalactic background light and dark matter powered stars in the early universe.
2010
6. - 10.12.2010
Andreas Maurer will be at the "25th Texas Symposium on Relativistic Astrophysics" speaking on "Constraints on dark matter powered stars from the extragalactic background light". Martin Raue will be there as well, co-presenting a poster on "The potential of the next generation Cherenkov telescopes to constrain the EBL" and several poster on the detection of new gamma-ray emitting active galactic nuclei with the H.E.S.S. instrument.
9. - 12.11.2010
Last week we had our workshop on "Cosmic radiation fields - sources in the early universe". The transparencies can be found on the webpage and there will be proceeding in the Proceedings of Science. Thank you all for coming and see you next time.
8. - 10.9.2010
Martin Raue will speak at the "Scineghe - Gamma-ray Astrophysics in the Multimessenger context" workshop on "EBL studies with ground based instruments - status and potential of future instruments".
26. - 30.7.2010
Andreas Maurer will be at the "IDM 2010 - 8th international workshop on Identification of Dark Matter" conference in Montpellier speaking on "Watching dark matter stars burn - possible signatures of Dark Stars in the EBL".
18. - 25.7.2010
Tanja Kneiske and Martin Raue will be at the cospar 10 conference in Bremen.
5. - 9.7.2010
Tanja Kneiske will be at the The 6th Patras Workshop on Axions, WIMPs and WISPs in Zurich.
8. - 12.3.2010
Next week M. Raue will be at the "First Stars and Galaxies: Challenges in the Next Decade" conference in Austin, Texas, discussing the future research on the early universe and the first stars.
25./26.2.2010
A. Maurer presented a poster on dark stars and the extragalactic background light at the "Astroteilchenphysik in Deutschland, Status und Perspektiven 2010" meeting in Zeuthen, Germany.
