Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Mortonson, Michael J."'
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2004.
Includes bibliographical references (p. 67-72).
We examine the effect that the shape of the source brightness profile has on the magnitude fluctuations of images
Includes bibliographical references (p. 67-72).
We examine the effect that the shape of the source brightness profile has on the magnitude fluctuations of images
Externí odkaz:
http://hdl.handle.net/1721.1/32748
Autor:
Mortonson, Michael J., Seljak, Uroš
Publikováno v:
JCAP10(2014)035
We analyze BICEP2 and Planck data using a model that includes CMB lensing, gravity waves, and polarized dust. Planck dust polarization maps have highlighted the difficulty of estimating the dust polarization in low intensity regions, suggesting that
Externí odkaz:
http://arxiv.org/abs/1405.5857
The accelerating expansion of the universe is the most surprising cosmological discovery in many decades. In this short review, we briefly summarize theories for the origin of cosmic acceleration and the observational methods being used to test these
Externí odkaz:
http://arxiv.org/abs/1401.0046
Autor:
Pieri, Matthew M., Mortonson, Michael J., Frank, Stephan, Crighton, Neil, Weinberg, David H., Lee, Khee-Gan, Noterdaeme, Pasquier, Bailey, Stephen J., Busca, Nicolas, Ge, Jian, Kirkby, David, Lundgren, Britt, Mathur, Smita, Paris, Isabelle, Palanque-Delabrouille, Nathalie, Petitjean, Patrick, Rich, James, Ross, Nicholas P., Schneider, Donald P., York, Donald G.
We present composite spectra constructed from a sample of 242,150 Lyman-alpha (Lya) forest absorbers at redshifts 2.4
Externí odkaz:
http://arxiv.org/abs/1309.6768
Publikováno v:
Phys.Rev.D85:103518,2012
Any theory invoked to explain cosmic acceleration predicts consistency relations between the expansion history, structure growth, and all related observables. Currently there exist high-quality measurements of the expansion history from Type Ia super
Externí odkaz:
http://arxiv.org/abs/1203.3195
Autor:
Weinberg, David H., Mortonson, Michael J., Eisenstein, Daniel J., Hirata, Christopher, Riess, Adam G., Rozo, Eduardo
The accelerating expansion of the universe is the most surprising cosmological discovery in many decades, implying that the universe is dominated by some form of "dark energy" with exotic physical properties, or that Einstein's theory of gravity brea
Externí odkaz:
http://arxiv.org/abs/1201.2434
Publikováno v:
Phys.Rev.D83:023015,2011
Observation of even a single massive cluster, especially at high redshift, can falsify the standard cosmological framework consisting of a cosmological constant and cold dark matter (LCDM) with Gaussian initial conditions by exposing an inconsistency
Externí odkaz:
http://arxiv.org/abs/1011.0004
Publikováno v:
Phys.Rev.D83:043505,2011
Future astrophysical datasets promise to strengthen constraints on models of inflation, and extracting these constraints requires methods and tools commensurate with the quality of the data. In this paper we describe ModeCode, a new, publicly availab
Externí odkaz:
http://arxiv.org/abs/1007.4205
Autor:
Mortonson, Michael J.
Constraints on the expansion history of the universe from measurements of cosmological distances make predictions for large-scale structure growth. Since these predictions depend on assumptions about dark energy evolution and spatial curvature, they
Externí odkaz:
http://arxiv.org/abs/1005.3716
Publikováno v:
Phys.Rev.D82:063004,2010
We compare current and forecasted constraints on dynamical dark energy models from Type Ia supernovae and the cosmic microwave background using figures of merit based on the volume of the allowed dark energy parameter space. For a two-parameter dark
Externí odkaz:
http://arxiv.org/abs/1004.0236