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The cosmic microwave background bispectrum as a test of the physics of inflation and probe of the astrophysics of the low-redshift universe
Eiichiro Komatsu, David N. Spergel
Why is non-Gaussianity interesting? One of generic predictions from inflationary scenarios is that primordial fluctuations are exactly Gaussian in linear order; however, the non-li…
CMB anisotropy from spatial correlations of clusters of galaxies
Eiichiro Komatsu, Tetsu Kitayama, Alexandre Refregier +2
The SZ effect from clusters of galaxies is a dominant source of secondary CMB anisotropy in the low-redshift universe. We present analytic predictions for the CMB power spectrum fr…
The Coalescence Rate of Double Neutron Star Systems
V. Kalogera, R. Narayan, D. N. Spergel +1
We estimate the coalescence rate of close binaries with two neutron stars (NS) and discuss the prospects for the detection of NS-NS inspiral events by ground-based gravitational-wa…
Gravitational Lens Statistics for Generalized NFW Profiles: Parameter Degeneracy and Implications for Self-Interacting Cold Dark Matter
J. S. B. Wyithe, E. L. Turner, D. N. Spergel
Strong lensing is a powerful probe of the distribution of matter in the cores of clusters of galaxies. Recent studies suggest that the cold dark matter model predicts cores that ar…
Self-Interacting Dark Matter
Benjamin D. Wandelt, Romeel Dave, Glennys R. Farrar +3
Spergel and Steinhardt have recently proposed the concept of dark matter with strong self-interactions as a means to address numerous discrepancies between observations of dark mat…
Halo Properties in Cosmological Simulations of Self-Interacting Cold Dark Matter
Romeel Davé, David N. Spergel, Paul J. Steinhardt +1
We present a comparison of halo properties in cosmological simulations of collisionless cold dark matter (CDM) and self-interacting dark matter (SIDM) for a range of dark matter cr…
Lyman-alpha Forest Constraints on the Mass of Warm Dark Matter and the Shape of the Linear Power Spectrum
Vijay K. Narayanan, David N. Spergel, Romeel Davé +1
High resolution N-body simulations of cold dark matter (CDM) models predict that galaxies and clusters have cuspy halos with excessive substructure. Observations reveal smooth halo…
Acoustic Signatures in the Primary Microwave Background Bispectrum
Eiichiro Komatsu, David N. Spergel
If the primordial fluctuations are non-Gaussian, then this non-Gaussianity will be apparent in the cosmic microwave background (CMB) sky. With their sensitive all-sky observation,…
Cross-correlating the Sloan Digital Sky Survey with the Microwave Sky
Hiranya V. Peiris, David N. Spergel
While most of the microwave background fluctuations on angular scales greater than a few arcminutes were generated at z > 800, the low redshift universe does distort the microwave…