Delabrouille, Jacques; Abitbol, Maximilian H.; Aghanim, Nabila; Ali-Haïmoud, Yacine; Alonso, David; Alvarez, Marcelo; Banday, Anthony J.; Bartlett, James G.; Baselmans, Jochem; Basu, Kaustuv; Battaglia, Nicholas; Climent, José Ramón Bermejo; Bernal, José L.; Béthermin, Matthieu; Bolliet, Boris; Bonato, Matteo; Bouchet, François R.; Breysse, Patrick C.; Burigana, Carlo; Cai, Zhen-Yi; Chluba, Jens; Churazov, Eugene; Dannerbauer, Helmut; De Bernardis, Paolo; De Zotti, Gianfranco; Di Valentino, Eleonora; Dimastrogiovanni, Emanuela; Endo, Akira; Erler, Jens; Ferraro, Simone; Finelli, Fabio; Fixsen, Dale; Hanany, Shaul; Hart, Luke; Hernández-Monteagudo, Carlos; Hill, J. Colin; Hotinli, Selim C.; Karatsu, Kenichi; Karkare, Kirit; Keating, Garrett K.; Khabibullin, Ildar; Kogut, Alan; Kohri, Kazunori; Kovetz, Ely D.; Lagache, Guilaine; Lesgourgues, Julien; Madhavacheril, Mathew; Maffei, Bruno; Mandolesi, Nazzareno; Martins, Carlos; Masi, Silvia; Mather, John; Melin, Jean-Baptiste; Dizgah, Azadeh Moradinezhad; Mroczkowski, Tony; Mukherjee, Suvodip; Nagai, Daisuke; Negrello, Mattia; Palanque-Delabrouille, Nathalie; Paoletti, Daniela; Patil, Subodh P.; Piacentini, Francesco; Raghunathan, Srinivasan; Ravenni, Andrea; Remazeilles, Mathieu; Revéret, Vincent; Rodriguez, Louis; Rotti, Aditya; Rubiño Martin, Jose-Alberto; Sayers, Jack; Scott, Douglas; Silk, Joseph; Silva, Marta; Souradeep, Tarun; Sugiyama, Naonori; Sunyaev, Rashid; Switzer, Eric R.; Tartari, Andrea; Trombetti, Tiziana; Zubeldia, Íñigo
This paper discusses the science case for a sensitive spectro-polarimetric survey of the microwave sky. Such a survey would provide a tomographic and dynamic census of the three-dimensional distribution of hot gas, velocity flows, early metals, dust, and mass distribution in the entire Hubble volume, exploit CMB temperature and polarisation anisotropies down to fundamental limits, and track energy injection and absorption into the radiation background across cosmic times by measuring spectral distortions of the CMB blackbody emission. In addition to its exceptional capability for cosmology and fundamental physics, such a survey would provide an unprecedented view of microwave emissions at sub-arcminute to few-arcminute angular resolution in hundreds of frequency channels, a data set that would be of immense legacy value for many branches of astrophysics. We propose that this survey be carried out with a large space mission featuring a broad-band polarised imager and a moderate resolution spectro-imager at the focus of a 3.5 m aperture telescope actively cooled to about 8K, complemented with absolutely-calibrated Fourier Transform Spectrometer modules observing at degree-scale angular resolution in the 10-2000 GHz frequency range. We propose two observing modes: a survey mode to map the entire sky as well as a few selected wide fields, and an observatory mode for deeper observations of regions of specific interest.
Anisotropy of the Cosmic Microwave Background
The general goal of this project is to determine and characterize the spatial and spectral variations in the temperature and polarisation of the Cosmic Microwave Background in angular scales from several arcminutes to several degrees. The primordial matter density fluctuations which originated the structure in the matter distribution of the present
Molecular Gas and Dust in Galaxies Across Cosmic Time
Two of the most fundamental questions in astrophysics are the conversion of molecular gas into stars and how this physical process is a function of environments on all scales, ranging from planetary systems, stellar clusters, galaxies to galaxy clusters. The main goal of this internal project is to get insight into the formation and evolution of