In the current cosmological scenario, part of the linearly polarized emission of the CMB is expected to be rotational (B-modes). This component is due to tensor perturbations of the metric produced by primordial gravitational waves, which are generated a split-second after the Big Bang. The signal expected is of the order of ≳0.1 μK, well below the non-rotational component of the polarization signal (E-modes), and beyond the sensitivity of present generation instruments. New, more sensitive instruments are developed in several labs, with the goal to measure the B-modes. Control of systematics and foregrounds will be the key to make the results of these experiments believable. In this paper we shortly outline BRAIN, a bolometric interferometer devoted to B-modes research, and its pathfinder experiment, devoted to test the Dome-C site. © EAS. EDP Sciences 2005.
Precision CMB Polarization from Dome-C: the BRAIN experiment / Masi, S., De Bernardis, P., Giordano, C., Nati, F., Piacentini, F., Polenta, G., Veneziani, M., Gervasi, M., Sironi, G., Tartari, A., Zannoni, M., Peterzen, S., Bartlett, J., Giraud Heraud, Y., Piat, M., Rosset, C., Giard, M., Pons, R., Maffei, B., Ade, P., et al.. - STAMPA. - 14:(2005), pp. 87-92. (Dome C Astronomy and Astrophysics Meeting Toulouse; France 28-30/06/2004) [10.1051/eas:2005014].
Precision CMB Polarization from Dome-C: the BRAIN experiment
MASI, Silvia;DE BERNARDIS, Paolo;GIORDANO, CLAUDIA;NATI, FEDERICO;PIACENTINI, Francesco;POLENTA, GIANLUCA;VENEZIANI, MARCELLA;G. Pisano;
2005
Abstract
In the current cosmological scenario, part of the linearly polarized emission of the CMB is expected to be rotational (B-modes). This component is due to tensor perturbations of the metric produced by primordial gravitational waves, which are generated a split-second after the Big Bang. The signal expected is of the order of ≳0.1 μK, well below the non-rotational component of the polarization signal (E-modes), and beyond the sensitivity of present generation instruments. New, more sensitive instruments are developed in several labs, with the goal to measure the B-modes. Control of systematics and foregrounds will be the key to make the results of these experiments believable. In this paper we shortly outline BRAIN, a bolometric interferometer devoted to B-modes research, and its pathfinder experiment, devoted to test the Dome-C site. © EAS. EDP Sciences 2005.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
