Conveners
08 - Cosmic microwave background
- Antony Lewis (University of Sussex)
08 - Cosmic microwave background
- Antony Lewis (University of Sussex)
Dr
Ricardo Génova Santos
(Instituto de Astrofísica de Canarias)
12/14/15, 2:25 PM
Talk
The QUIJOTE (Q-U-I JOint TEnerife) experiment is a new polarimeter working in the frequency range 10-40 GHz, and designed to characterize the primordial B-mode anisotropy of the CMB polarization down to a sensitivity in the tensor-to-scalar ratio of r~0.05, and to measure the level of the polarization of low-frequency Galactic foregrounds (the synchrotron and the anomalous dust emissions). The...
Jens Chluba
(Institute of Astronomy)
12/14/15, 2:45 PM
Talk
CMB spectral distortions caused by energy release in the early Universe create broad distortions that are usually described as superposition of mu-, y- and r-type distortions. These signals will allow us to gain new insights into the pre-recombination Universe, telling us about early-universe and particle physics. There is, however, another way to create distortions: by *photon injection*. One...
Dr
Juan Francisco Macias-Perez
(LPSC)
12/14/15, 3:05 PM
Talk
Clusters of galaxies are the largest bound structures in the Universe. Thus, they are observables of choice for cosmology both in terms of their aboundance and of their distribution on the sky. Clusters of galaxies can be observed at different wavelengths via their X-ray and radio emission as well as from the optical emission of their galaxies. In addition, they can be studied via the thermal...
Frédéric MAYET
(CNRS)
12/14/15, 3:25 PM
Talk
Thermal Sunyaev-Zeldovich effect (tSZ) is a powerful probe that has been proved to be complementary with respect to traditional methods of cluster detection (e.g. X-ray, optical). Previous arcmin resolution tSZ observations (e.g. SPT, ACT and Planck) only allowed detailed studies of the intra cluster medium morphology for low redshift clusters (z < 0.2). Thus, the development of precision...
Ms
Isabel Oldengott
(Universität Bielefeld)
12/14/15, 4:15 PM
Talk
We study the impact of dark matter decay on cosmic reionization. We derive new constraints on the dark matter decay rate by using the newest CMB observations, assuming two different parametrizations of standard reionization.
Ms
Daniela Saadeh
(University College London)
12/14/15, 4:35 PM
Talk
Large scales in the Cosmic Microwave Background (CMB) may break statistical isotropy. Bianchi models are often invoked as a possible explanation for these low-\ell features: they provide an anisotropic underlying pattern over which the usual stochastic fluctuations are superimposed. However, the Bianchi models generally employed in the analysis of CMB data — despite mimicking the anomalies in...
Mr
Giovanni Cabass
(Physics Department and INFN, “La Sapienza” University of Rome)
12/14/15, 4:55 PM
Talk
Gravitational waves can be produced by a wide range of astrophysical phenomena, such as inspiral and merging of neutron stars and black holes, supernova of massive stars, accreting neutron stars, etc. This talk is focused, instead, on a stochastic background of gravitational waves (GWs) of cosmological origin, like the one predicted by inflation.
I start by considering a power law...
Laura Salvati
(University of Rome, Sapienza)
12/14/15, 5:15 PM
Talk
We show how to derive new constraints on the neutron lifetime based on cosmological observations. Under the assumption of standard Big Bang Nucleosynthesis, the abundance of light elements, in particular Helium, is strongly dependent on the neutron lifetime. From CMB anisotropies it is possible to constrain primordial abundances of light elements, inferring the value of the neutron lifetime....
Mr
Jacopo Fumagalli
(Nikhef)
12/14/15, 5:35 PM
Talk
The idea of introducing a non minimal coupling between the Higgs boson and the gravity sector gives successful predictions for inflation without needing new particles beyond the ones we know. Quantum mechanically the model is only consistent until the unitarity cutoff.
Possible UV completions beyond this cutoff could change its predictions. If this is the case it means that we would lose...
