Browsing FAS Scholarly Articles by Keyword "cosmology"

Now showing items 1-18 of 18

    • BICEP2 and Keck array operational overview and status of observations 

      Ogburn, R. W.; Ade, P. A. R.; Aikin, R. W.; Amiri, M.; Benton, S. J.; Bischoff, Colin A.; Bock, J. J.; Bonetti, J. A.; Brevik, J. A.; Bullock, E.; Burger, B.; Davis, G.; Dowell, C. D.; Duband, L.; Filippini, J. P.; Fliescher, S.; Golwala, S. R.; Gordon, M.; Halpern, M.; Hasselfield, M.; Hilton, G.; Hristov, V. V.; Hui, H.; Irwin, K.; Kaufman, J. P.; Keating, B. G.; Kernasovskiy, S. A.; Kovac, John M; Kuo, C. L.; Leitch, E. M.; Lueker, M.; Montroy, T.; Netterfield, C. B.; Nguyen, H. T.; O, R.; Orlando, Abigail Claire; Pryke, C; Reintsema, C.; Richter, Sonja Valeska; Ruhl, J. E.; Runyan, M. C.; Schwarz, R.; Sheehy, C. D.; Staniszewski, Z. K.; Sudiwala, R. V.; Teply, G. P.; Thompson, K.; Tolan, J. E.; Turner, A. D.; Vieregg, A. G.; Wiebe, D. V.; Wilson, P.; Wong, C. L. (SPIE, 2012)
      The Bicep2 and Keck Array experiments are designed to measure the polarization of the cosmic microwave background (CMB) on angular scales of 2-4 degrees (ℓ = 50–100). This is the region in which the B-mode signal, a signature ...

    • Central Charge for \(AdS_2\) Quantum Gravity 

      Hartman, Thomas; Strominger, Andrew E. (Institute of Physics, 2009)
      Two-dimensional Maxwell-dilaton quantum gravity on \(AdS_2\) with radius \(\ell\) and a constant electric field \(E\) is studied. In conformal gauge, this is equivalent to a CFT on a strip. In order to maintain consistent ...

    • Characterization of the BICEP Telescope for High-precision Cosmic Microwave Background Polarimetry 

      Takahashi, Yuki D.; Ade, Peter; Barkats, Denis; Battle, John O.; Bierman, Evan M.; Bock, James; Chiang, H. Cynthia; Dowell, C. Darren; Duband, Lionel; Hivon, Eric F.; Holzapfel, William L.; Hristov, Victor V.; Jones, William C.; Keating, Brian G.; Kovac, John M; Kuo, Chao-Lin; Lange, Andrew E.; Leitch, Erik M.; Mason, Peter V.; Matsumura, Tomotake; Nguyen, Hien T.; Ponthieu, N.; Pryke, Clement; Richter, Steffen; Rocha, Graca M.; Yoon, Ki Won (IOP Publishing, 2010)
      The Background Imaging of Cosmic Extragalactic Polarization (BICEP) experiment was designed specifically to search for the signature of inflationary gravitational waves in the polarization of the cosmic microwave background ...

    • Constraining the CMB optical depth through the dispersion measure of cosmological radio transients 

      Fialkov, Anastasia; Loeb, Abraham (IOP Publishing, 2016)
      The dispersion measure of extragalactic radio transients, such as of recently discovered Fast Radio Burst FRB150418, can be used to measure the column density of free electrons in the intergalactic medium. The same electrons ...

    • Dynamical Compactification from de Sitter Space 

      Carroll, Sean M.; Johnson, Matthew C.; Randall, Lisa (Springer, 2009)
      We show that \(D\)-dimensional de Sitter space is unstable to the nucleation of non-singular geometries containing spacetime regions with different numbers of macroscopic dimensions, leading to a dynamical mechanism of ...

    • Emergent Dark Matter, Baryon, and Lepton Numbers 

      Cui, Yanou; Randall, Lisa; Shuve, Brian James (Springer, 2011)
      We present a new mechanism for transferring a pre-existing lepton or baryon asymmetry to a dark matter asymmetry that relies on mass mixing which is dynamically induced in the early universe. Such mixing can succeed with ...

    • Energy Flows in Low-Entropy Complex Systems 

      Chaisson, Eric J. (MDPI AG, 2015)
      Nature’s many complex systems—physical, biological, and cultural—are islands of low-entropy order within increasingly disordered seas of surrounding, high-entropy chaos. Energy is a principal facilitator of the rising ...

    • Measurement of Cosmic Microwave Background Polarization Power Spectra from Two Years of BICEP Data 

      Chiang, H. Cynthia; Ade, Peter A. R.; Barkats, Denis; Battle, John O.; Bierman, Evan M.; Bock, James; Dowell, C. Darren; Duband, Lionel; Hivon, Eric F.; Holzapfel, William L.; Hristov, Victor V.; Jones, William C.; Keating, Brian G.; Kovac, John M; Kuo, Chao-Lin; Lange, Andrew E.; Leitch, Erik M.; Mason, Peter V.; Matsumura, Tomotake; Nguyen, Hien T.; Ponthieu, Nicolas; Pryke, Clement; Richter, Steffen; Rocha, Graca; Sheehy, Christopher; Takahashi, Yuki D.; Tolan, Jamie E.; Yoon, Ki Won (IOP Publishing, 2010)
      Background Imaging of Cosmic Extragalactic Polarization (BICEP) is a bolometric polarimeter designed to measure the inflationary B-mode polarization of the cosmic microwave background (CMB) at degree angular scales. During ...

    • Microfabrication and Device Parameter Testing of the Focal Plane Arrays for the Spider and BICEP2?Keck CMB Polarimeters 

      Bonetti, J. A.; Turner, A. D.; Kenyon, M.; Orlando, A.; Brevik, J. A.; Trangsrud, A.; Sudiwala, R.; LeDuc, H. G.; Nguyen, H. T.; Day, P. K.; Bock, J. J.; Golwala, S. R.; Sayers, J.; Kovac, John M; Lange, A. E.; Jones, W. C.; Kuo, C. L; Young, Betty; Cabrera, Blas; Miller, Aaron (2009)
      Spider and BICEP2/Keck are projects to study the polarization of the cosmic microwave background (CMB). The focal planes for both require large format arrays of superconducting transition edge sensors (TES's). A major ...

    • Pirahã Exceptionality: A Reassessment 

      Nevins, Andrew Ira; Pesetsky, David; Rodrigues, Cilene (Linguistic Society of America, 2009)
      Everett (2005) has claimed that the grammar of Pirahã is exceptional in displaying 'inexplicable gaps', that these gaps follow from a cultural principle restricting communication to 'immediate experience', and that this ...

    • The QUaD Galactic Plane Survey. I. Maps and Analysis of Diffuse Emission 

      Culverhouse, Thomas; Ade, Peter; Bock, James; Bowden, Melanie; Brown, Michael L.; Cahill, Gary; Castro, Patricia G.; Church, Sarah E.; Friedman, Robert; Ganga, Ken; Gear, Walter K.; Gupta, Sujata; Hinderks, James R.; Kovac, John M; Lange, Andrew E.; Leitch, Erik; Melhuish, Simon J.; Memari, Yasin; Murphy, J. Anthony; Orlando, Angiola; Schwarz, Robert; O'Sullivan, Creidhe; Piccirillo, Lucio; Pryke, Clement; Rajguru, Nutan; Rusholme, Ben; Taylor, Andrew N.; Thompson, Keith L.; Turner, Abigail H.; Wu, Ed Y. S.; Zemcov, Michael (IOP Publishing, 2010)
      We present a survey of ~800 deg\(^{2}\) of the galactic plane observed with the QUaD telescope. The primary products of the survey are maps of Stokes I, Q, and U parameters at 100 and 150 GHz, with spatial resolution of ...

    • Quantum Criticality and Black Holes 

      Sachdev, Subir; Müller, Markus (Institute of Physics, 2009)
      Many condensed matter experiments explore the finite temperature dynamics of systems near quantum critical points. Often, there are no well-defined quasiparticle excitations, and so quantum kinetic equations do not describe ...

    • The Robinson Gravitational Wave Background Telescope (BICEP): a bolometric large angular scale CMB polarimeter 

      Yoon, K. W.; Ade, P. A. R.; Barkats, D.; Battle, J. O.; Bierman, E. M.; Bock, J. J.; Brevik, J. A.; Chiang, H. C.; Crites, A.; Dowell, C. D.; Duband, L.; Griffin, G. S.; Hivon, E. F.; Holzapfel, W. L.; Hristov, V. V.; Keating, B. G.; Kovac, John; Kuo, C. L.; Lange, A. E.; Leitch, E. M.; Mason, P. V.; Nguyen, H. T.; Ponthieu, N.; Takahashi, Y. D.; Renbarger, T.; Weintraub, L. C.; Woolsey, D. (2006)
      The Robinson Telescope (BICEP) is a ground-based millimeter-wave bolometric array designed to study the polarization of the cosmic microwave background radiation (CMB) and galactic foreground emission. Such measurements ...

    • Second and Third Season QUaD Cosmic Microwave Background Temperature and Polarization Power Spectra 

      Pryke, Clement; Ade, Peter; Bock, James; Bowden, Melanie; Brown, Michael L.; Cahill, Gary; Castro, Patricia G.; Church, Sarah; Culverhouse, Thomas; Friedman, Robert; Ganga, Ken; Gear, Walter K.; Gupta, Sujata; Hinderks, James; Kovac, John M; Lange, Andrew E.; Leitch, Erik; Melhuish, Simon J.; Memari, Yasin; Murphy, J. Anthony; Orlando, Angiola; Schwarz, Robert; O'Sullivan, Creidhe; Piccirillo, Lucio; Rajguru, Nutan; Rusholme, Ben; Taylor, Andrew N.; Thompson, Keith L.; Turner, Abigail H.; Wu, Ed Y. S.; Zemcov, Michael B. (IOP Publishing, 2009)
      We report results from the second and third seasons of observation with the QUaD experiment. Angular power spectra of the cosmic microwave background are derived for both temperature and polarization at both 100 GHz and ...

    • A unifying concept for astrobiology 

      Chaisson, Eric J. (Cambridge University Press (CUP), 2003)
      Evolution, broadly construed, has become a powerful unifying concept in much of science – not only in the biological evolution of plants and animals, but also in the physical evolution of stars and planets, and the cultural ...

    • Updated Kinematic Constraints on a Dark Disk 

      Kramer, Eric David; Randall, Lisa (American Astronomical Society, 2016)
      We update the method of the Holmberg & Flynn (2000) study, including an updated model of the Milky Way’s interstellar gas, radial velocities, an updated reddening map, and a careful statistical analysis, to bound the allowed ...

    • Warped \(AdS_3\) Black Holes 

      Anninos, Dionysios; Li, Wei; Padi, Megha; Song, Wei; Strominger, Andrew E. (Institute of Physics, 2009)
      Three dimensional topologically massive gravity (TMG) with a negative cosmological constant \(-\ell^{-2}\) and positive Newton constant \(G\) admits an \(AdS_3\) vacuum solution for any value of the graviton mass \(\mu\). ...

    • Wrapped \(M2/M5\) Duality 

      Guica, Monica; Strominger, Andrew E. (Institute of Physics, 2009)
      A microscopic accounting of the entropy of a generic 5D supersymmetric rotating black hole, arising from wrapped \(M2\)-branes in Calabi-Yau compactified \(M\)-theory, is an outstanding unsolved problem. In this paper we ...