We propose a new reionization probe that uses cosmic microwave background (CMB) observations; the cross-correlation between fluctuations in CMB optical depth which probes integrated electron density, $\delta\tau$, and Compton $y$-map pressure. This is much less contaminated than power spectrum by late-time cluster contributions. In addition, this can constrain temperature of ionized bubbles whi...

Understanding the sources of volatile organic compounds (VOCs) is essential for ground-level ozone and secondary organic aerosol (SOA) abatement measures. We made VOC measurements at 27 sites and online observations at an urban site in Beijing from July 2009 to January 2012. Based on these measurement data, we determined the spatial and temporal distribution of VOCs, estimated their annual emis...

The Ehlers-Ellis 1+3 formulation of covariant hydrodynamics, when supplemented with covariant radiative transport theory, gives an exact, physically transparent description of the physics of the cosmic microwave background radiation (CMB). Linearisation around a Friedmann-Robertson-Walker (FRW) universe provides a very direct and seamless route through to the linear, gaugeinvariant perturbation...

The recent WMAP data represents a milestone in cosmology and helps constrain cosmological parameters with unprecedented accuracy. In this work we combine the WMAP data with previous CMB anisotropy measurements at smaller angular scales to characterize the shape of the CMB anisotropy power spectrum. We carry out a phenomenological analysis of the data. By allowing non-physical shapes of the powe...

Your thesaurus codes are: missing; you have not inserted them Abstract. We report here the first full sky component separation and CMB power spectrum estimation using a Wiener filtering technique on simulated data from the up-coming MAP experiment, set to launch in early 2001. The simulations included contributions from the three dominant astrophysical components expected in the five MAP spectr...

Details of how the primordial plasma recombined and how the universe later reionized are currently somewhat uncertain. This uncertainty can restrict the accuracy of cosmological parameter measurements from the Cosmic Microwave Background (CMB). More positively, future CMB data can be used to constrain the ionization history using observations. We first discuss how current uncertainties in the r...

We have derived new bounds on the relativistic energy density in the Universe from cosmic microwave background (CMB), large scale structure (LSS), and type Ia supernova (SNI-a) observations. In terms of the effective number of neutrino species a bound of Nν = 4.2 +1.2 −1.7 is derived at 95% confidence. This bound is significantly stronger than previous determinations, mainly due to inclusion of...

The current enthusiam to measure fluctuations in the CMB power spectrum at angular scales between 0.1 and 1 is largely motivated by the expectation that CMB determinations of cosmological parameters will be of unprecedented precision. In such circumstances it is important to estimate what we can already say about the cosmological parameters. In two recent papers (Lineweaver et al. 1997a & 1997b...

We use a combination of the most recent cosmic microwave background (CMB) flat-band power measurements to place constraints on Hubble’s constant h and the total density of the Universe Ωo in the context of inflation-based cold dark matter (CDM) models with no cosmological constant. We use χ minimization to explore the 4-dimensional parameter space having as free parameters, h, Ωo, the power spe...

We study the effects of diffuse Galactic, far-infrared extragalactic source, and radio point source emission on the cosmic microwave background (CMB) anisotropy data anticipated from the MAP experiment. We focus on the correlation function and genus statistics measured from mock MAP foreground-contaminated CMB anisotropy maps generated in a spatially-flat cosmological constant dominated cosmolo...