ar X iv : a st ro - p h / 04 06 44 9 v 1 2 1 Ju n 20 04 1 A SEARCH FOR CYCLOTRON RESONANCE FEATURES WITH INTEGRAL

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ar X iv : a st ro - p h / 04 06 33 8 v 2 1 6 Ju n 20 04 Do We Know of any Maunder Minimum Stars ? 1

Most stars previously identified as Maunder minimum stars are old stars evolved off of the main sequence. Analysis of activity measurements from the California and Carnegie Planet Search program stars and Hipparcos parallaxes implies that the canonical age-chromospheric activity relation breaks down for stars older than ∼ 6 Gyr when activity is calculated from Mount Wilson S values. Stars only ...

ar X iv : a st ro - p h / 04 06 65 8 v 1 2 9 Ju n 20 04 Calibration of cameras of the H . E . S . S . detector

H.E.S.S. – the High Energy Stereoscopic System– is a new system of large atmospheric Cherenkov telescopes for GeV/TeV astronomy. Each of the four telescopes of 107 m mirror area is equipped with a 960-pixel photomulitiplier-tube camera. This paper describes the methods used to convert the photomultiplier signals into the quantities needed for Cherenkov image analysis. Two independent calibratio...

ar X iv : a st ro - p h / 04 06 33 8 v 1 1 5 Ju n 20 04 Do We Know of any Maunder Minimum Stars ? 1

Most stars previously identified as Maunder minimum stars are old stars evolved off of the main sequence. Analysis of activity measurements from the California and Carnegie Planet Search program stars and Hipparcos parallaxes implies that the canonical age-chromospheric activity relation breaks down for stars older than ∼ 6 Gyr when activity is calculated from Mount Wilson S values. Stars only ...

ar X iv : a st ro - p h / 04 06 67 0 v 1 2 9 Ju n 20 04 Inflation After WMAP

I examine the status of inflationary cosmology in light of the first-year data from the WMAP satellite, focusing on the simplest models of inflation: those driven by a single scalar field. The WMAP observation of the Cosmic Microwave Background is the first unified, self-consistent data set capable of putting meaningful constraints on the inflationary parameter space. WMAP provides significant ...