ar X iv : a st ro - p h / 94 02 02 3 v 1 9 F eb 1 99 4 November 1993 BROWN - HET - 926 Signatures of Cosmic Strings on the Microwave Background

ar X iv : a st ro - p h / 98 02 01 2 v 1 2 F eb 1 99 8 Reconstructing the global topology of the universe from the cosmic microwave background

If the universe is multiply-connected and sufficiently small, then the last scattering surface wraps around the universe and intersects itself. Each circle of intersection appears as two distinct circles on the microwave sky. The present article shows how to use the matched circles to explicitly reconstruct the global topology of space.

ar X iv : a st ro - p h / 99 02 06 2 v 1 4 F eb 1 99 9 SOURCES OF RELATIVISTIC JETS IN THE GALAXY

ar X iv : a st ro - p h / 96 02 01 9 v 1 5 F eb 1 99 6 IASSNS - 96 / 6 ACOUSTIC SIGNATURES IN THE COSMIC MICROWAVE

We study the uniqueness and robustness of acoustic signatures in the cosmic microwave background by allowing for the possibility that they are generated by some as yet unknown source of gravitational perturbations. The acoustic pattern of peak locations and relative heights predicted by the standard inflationary cold dark matter model is essentially unique and its confirmation would have deep i...

ar X iv : a st ro - p h / 99 02 04 7 v 1 3 F eb 1 99 9 New CMB Power Spectrum Constraints from MSAM 1

We present new cosmic microwave background (CMB) anisotropy results from the combined analysis of the three flights of the first Medium Scale Anisotropy Measurement (MSAM1). This balloon-borne bolometric instrument measured about 10 square degrees of sky at half-degree resolution in 4 frequency bands from 5.2 cm to 20 cm with a high signal-to-noise ratio. Here we present an overview of our anal...

ar X iv : a st ro - p h / 98 02 06 1 v 1 5 F eb 1 99 8 Cosmic Axion ∗

+ θ̄ 16π2 TrFμνF̃ μν (2) Since this θ̄ term violates CP invariance, the upper bound of the neutron electric dipole moment puts a strong constraint on the magnitude of θ̄, |θ̄| < 10. The smallness of θ̄ has led to the strong CP problem, “Why is θ̄ so small?” [1] We know that many small parameters in physics have led to new ideas, in most cases leading to new symmetries. For example, MW/MP ≪ 1 has led t...