Professor Pedro Ferreira: Publications

The Cℓover experiment

Proceedings of SPIE the International Society for Optical Engineering 7020 (2008)

Authors:

L Piccirillo, P Ade, MD Audley, C Baines, R Battye, M Brown, P Calisse, A Challinor, WD Duncan, P Ferreira, W Gear, DM Glowacka, D Goldie, PK Grimes, M Halpern, V Haynes, GC Hilton, KD Irwin, B Johnson, M Jones, A Lasenby, P Leahy, J Leech, S Lewis, B Maffei, L Martinis, PD Mauskopf, SJ Melhuish, CE North, D O'Dea, S Parsley, G Pisano, CD Reintsema, G Savini, RV Sudiwala, D Sutton, A Taylor, G Teleberg, D Titterington, VN Tsaneva, C Tucker, R Watson, S Withington, G Yassin, J Zhang

Abstract:

CℓOVER is a multi-frequency experiment optimised to measure the Cosmic Microwave Background (CMB) polarization, in particular the B-mode component. CℓOVER comprises two instruments observing respectively at 97 GHz and 150/225 GHz. The focal plane of both instruments consists of an array of corrugated feed-horns coupled to TES detectors cooled at 100 mK. The primary science goal of CℓOVER is to be sensitive to gravitational waves down to r ∼ 0.03 (at 3σ) in two years of operations.

Constraining Lorentz violation with cosmology

(2008)

Authors:

JA Zuntz, PG Ferreira, TG Zlosnik

Map-making in small field modulated CMB polarisation experiments: approximating the maximum-likelihood method

(2008)

Authors:

D Sutton, BR Johnson, ML Brown, P Cabella, PG Ferreira, KM Smith

Living in a Void: Testing the Copernican Principle with Distant Supernovae

(2008)

Authors:

Timothy Clifton, Pedro G Ferreira, Kate Land

Dark Matter, Modified Gravity and the Mass of the Neutrino

ArXiv 0806.0116 (2008)

Authors:

PG Ferreira, C Skordis, C Zunckel

Abstract:

It has been suggested that Einstein's theory of General Relativity can be modified to accomodate mismatches between the gravitational field and luminous matter on a wide range of scales. Covariant theories of modified gravity generically predict the existence of extra degrees of freedom which may be interpreted as dark matter. We study a subclass of these theories where the overall energy density in these extra degrees of freedom is subdominant relative to the baryon density and show that they favour the presence of massive neutrinos. For some specific cases (such as a flat Universes with a cosmological constant) one finds a conservative lower bound on the neutrinos mass of $m_ν>0.31$ eV.

51��