Conveners
Cosmic Backgrounds from Radio to Far-IR: Block 1
- Carlo Burigana (INAF-Istituto di Radioastronomia)
Description
This parallel session will focus on the interpretation and perspectives for cosmology and astrophysics coming from cosmic backgrounds from radio to far-IR, both in temperature and in polarization.
The latest results from the Planck mission have been recently presented, while new sub-orbital experiments are investigating CMB polarization anisotropies and searching for primordial gravitational waves, and future CMB missions of different scales are foreseen or under study. The sub-mm / far-IR domain, crucial for high-frequency foreground mitigation, allows to study a number of astrophysical cosmology topics, including the early stages of star and galaxy formation. In parallel, on-going and future radio projects promise to shed light on the dawn age and on the reionization epoch and to provide 3D images of the Universe's evolution.
The authors of both invited and contributed talks are encouraged to underline the connection between astrophysical and cosmological results.
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Amanda Weltman (University of Cape Town)05/07/2021, 16:30Cosmic Backgrounds from radio to far-IRInvited talk in the parallel session
In this talk we will consider several ways to use background radio radiation to learn about the large scale features of our universe as well as fundamental physics. In particular, we will highlight the power in cataloguing and understand a large number of Fast Radio Bursts and their background environments to learn about cosmology.
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Tirthankar Roy Choudhury (National Centre for Radio Astrophysics, Tata Institute of Fundamental Research)05/07/2021, 16:49Cosmic Backgrounds from radio to far-IRInvited talk in the parallel session
The redshifted 21 cm line of neutral hydrogen is one of the most useful probes of the early universe. Several experiments are ongoing and are being planned to detect the signal from high redshifts. Detection of the signal will help in understanding the first stars in the Universe, the formation and evolution of galaxies and also constraining cosmological parameters. In this talk, we will...
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Marcos López-Caniego (Aurora Technology for ESA)05/07/2021, 17:08Cosmic Backgrounds from radio to far-IRInvited talk in the parallel session
The Planck Legacy Archive (PLA) hosts the products from the European Space Agency mission to study the Cosmic Microwave Background (CMB). The PLA web interface (https://pla.esac.esa.int) directs the users to a wide variety of Planck products, e.g., time ordered data, CMB maps, frequency and astrophysical components maps (Dust, Synchrotron, Free-Free, CIB,..), source catalogues and other...
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Elia Stefano Battistelli (Spaienza University of Rome)05/07/2021, 17:27Cosmic Backgrounds from radio to far-IRInvited talk in the parallel session
The interaction of the Cosmic Microwave Background (CMB) photons with hot electron gas in Galaxy Clusters and surrounding medium can be detected through the Sunyaev Zel'dovich effect. When this effect is detected with high enough angular resolution (~10'') it allows astrophysicists to study the physics of galaxy clusters, relaxed and non-relaxed clusters, and detect filamentary structures...
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Hideki Tanimura (L'Institut d'Astrophysique Spatiale (IAS)), Dr Nabila Aghanim (Institut d'Astrophysique spatiale), Dr Marian Douspis (Institut d'Astrophysique spatiale)05/07/2021, 17:46Cosmic Backgrounds from radio to far-IRTalk in the parallel session
The thermal Sunyaev-Zeldovich (tSZ) effect is produced by the inverse Compton scattering of cosmic microwave background (CMB) photons by hot electrons, particularly in galaxies clusters. It has been used as a powerful probe to constrain the cosmological parameters, given its particular sensitivity to sigma8 and omega_m.
We present a new all-sky tSZ map constructed from the latest Planck PR4...
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Ms Raelyn Sullivan (University of British Columbia)05/07/2021, 18:00Cosmic Backgrounds from radio to far-IRInvited talk in the parallel session
The largest temperature anisotropy in the cosmic microwave background (CMB) is the dipole. The simplest interpretation of the dipole is that it is due to our motion with respect to the rest frame of the CMB (with debate over the possibility of alternative explanations). As well as creating the $\ell=1$ mode of the CMB sky, this motion affects all astrophysical observations by modulating and...
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seddigheh tizchang (School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM)05/07/2021, 18:19Cosmic Backgrounds from radio to far-IRTalk in the parallel session
In the standard cosmological scenario, no circular polarization is predicted for Cosmic Microwave Background (CMB) radiation. However, in the frame of moving particle, Lorentz symmetry can violate and lead to circular polarization for CMB radiation. We estimate the circular polarization power spectrum $C_l^{V(S)}$ in CMB radiation due to Compton scattering in presence of the Lorentz symmetry...
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Constantinos Skordis (CEICO, Institute of Physics of the Czech Academy of Sciences)05/07/2021, 18:33Cosmic Backgrounds from radio to far-IRInvited talk in the parallel session
Cosmological and astronomical observations indicate that the majority
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of mass and energy density of fields in the universe are in a form
which interacts extremely weakly, if at all, with light. The standard
interpretation is the existence of dark matter, commonly thought to be
in the form of particles not part of the standard model of particle
physics. At present a firm detection of such... -
Matthieu Tristram (IJClab, CNRS, France)05/07/2021, 18:52Cosmic Backgrounds from radio to far-IRInvited talk in the parallel session
I will present constraints on the tensor-to-scalar ratio r using Planck data as described in [Tristram et al., A&A, 647, A128 (2021)].
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In this paper, we use the latest release of Planck maps (PR4), processed with the NPIPE code, which produces calibrated frequency maps in temperature and polarisation for all Planck channels from 30 GHz to 857 GHz using the same pipeline. We computed... -
Laura Bonavera (University of Oviedo)05/07/2021, 19:11Cosmic Backgrounds from radio to far-IRInvited talk in the parallel session
The high-z submillimeter galaxies (SMGs) can be used as background sample for gravitational lensing studies thanks to their magnification bias (Gonzalez-Nuevo et al. 2017), which can manifest itself through a non-negligible measurement of the cross-correlation function between a background and a foreground source sample with non-overlapping redshift distributions. In particular, the choice of...
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Cosmic Backgrounds from radio to far-IR