PHENIICS Doctoral School Days

Session

Cosmology and astroparticles

10 mai 2016, 16:00

Auditorium Pierre Lehmann (Laboratoire de l'Accélérateur Linéaire (LAL))

Description

Chairpersons: Jean-Baptiste DURRIVE and Clément MARTINACHE

21. Quasar-Lyman α Forest Cross-Correlation from SDSS-III BOSS survey: Baryon Acoustic Oscillations

M. Hélion du Mas des Bourboux (CEA, Saclay)

10/05/2016 16:00

Cosmology & Astroparticles

Oral Presentation

We measure the large-scale cross-correlation of quasars with the Lyman-alpha forest absorption field. We use over 170,000 forests from Data Release 12 (DR12) of the SDSS-III BOSS survey and over 240,000 quasars from DR12 and from DR7 of the SDSS-II survey. This study allows us to measure the Baryonic Acoustic Oscillation (BAO) scale, along and across the line of sight, at a mean redshift of z...

89. Studies for LHAASO-WFCTA and AUGER-Upgrade-SSD

M. Zizhao ZONG (IPN-Orsay)

10/05/2016 16:15

Cosmology & Astroparticles

Oral Presentation

The LHAASO (Large High Altitude Air Shower Observatory) project is a cosmic-ray observatory under constructing in China. WFCTA (Wide Field of View Cherenkov Telescope Array) is a important module in the LHAASO hybrid detection. This thesis work concertracte on the simulation and event reconstruction of WFCTA when it's working with other modules in LHAASO. This talk will show some preliminary...

33. Warm Dark Matter Constraints using the Lyman-alpha Forest

M. Julien Baur (CEA-Irfu/SPP)

10/05/2016 16:30

Cosmology & Astroparticles

Oral Presentation

Lyman-alpha absorption features probe the distribution of neutral Hydrogen (a legitimate tracer for dark matter) along the line-of-sight of luminous, high-redshift quasars. As such, they are a useful tool for probing the power spectrum at scales below a few Mpc and can thus be a powerful data set to test non-linear cosmological effects such as the mass of neutrinos. Using an unprecedently...

48. Cosmology and fundamental physics with extragalactic gamma rays

M. Matthias Lorentz (Irfu, CEA Saclay)

10/05/2016 16:45

Cosmology & Astroparticles

Oral Presentation

Very high energy gamma rays (VHE, > 100 GeV) propagating over cosmological distances interact with the extragalactic background light (EBL) which is the second most intense background in the Universe after the cosmic microwave background. Observations of spectral features in the VHE band of extragalactic sources related to this energy-dependent absorption process with the H.E.S.S. array of...

62. The EUSO-BALLOON instrument and evaluating the performance of PDM

M. Julio Arturo Rabanal Reina (EUSO-BALLOON)

10/05/2016 17:00

Cosmology & Astroparticles

Oral Presentation

The EUSO-Balloon telescope is composed by a PDM, which is a phatfinder of one of the 130 PDM the front-end of the JEM-EUSO telescope. JEM-EUSO is the telescope that have like aim the detection of the UHECR watching the Earth's atmosphere from the space (inside the Japanese module of ISS)The first focus of this work was the integration of PDM and the corresponding validation test . Inside this,...

113. H.E.S.S. Observations of the giant radio galaxy M87

Mlle Floriana Zefi (LLR-Ecole Polytechnique)

10/05/2016 17:15

Cosmology & Astroparticles

Oral Presentation

The supergiant elliptical galaxy M87 has been first detected at Very High Energies (VHE, E > 0.4 TeV) by the H.E.S.S. telescopes in 2005. M87 has been continuously observed by the VHE instruments, resulting in the detection of three high flux states occurring respectively in 2005, 2008 and 2010. However, the origin and location of the gamma-rays production remains still unresolved. With its...