Magnetism in the nearby galaxy M 33

Galaxy M 33 : A Geometric Distance

We report on the results of a 14 year long VLBI study of proper motions in the IC 133 H 2 O maser source in the galaxy M33. The method of Ordered Motion Parallax was used to model the 3-dimensional structure and dynamics of IC 133 and obtain a distance estimate, 800 ± 180 kpc. Our technique for determining the distance to M33 is independent of calibrations common to other distance indicators, s...

High - Velocity Clouds in the Nearby Spiral Galaxy M 83

We present deep H I 21-cm and optical observations of the face-on spiral galaxy M 83 obtained as part of a project to search for high-velocity clouds (HVCs) in nearby galaxies. Anomalous-velocity neutral gas is detected toward M 83, with 5.6×10 M⊙ of H I contained in a disk rotating 40–50 km s more slowly in projection than the bulk of the gas. We interpret this as a vertically extended thick d...

XMM - Newton survey of the Local Group galaxy M 33 ⋆

In an XMM-Newton raster observation of the bright Local Group spiral galaxy M 33 we study the population of X-ray sources (X-ray binaries, supernova remnants) down to a 0.2–4.5 keV luminosity of 10 35 erg s −1 – more than a factor of 10 deeper than earlier ROSAT observations. EPIC hardness ratios and optical and radio information are used to distinguish between different source classes. The sur...

The Nearby Field Galaxy

Effect in Nearby Galaxy Clusters

We present H 0 results from Cosmic Background Imager (CBI) observations of the Sunyaev-Zel'dovich Effect (SZE) in 7 galaxy clusters, A85, A399, A401, A478, A754, A1651, and A2597. These observations are part of a program to study a complete, volume-limited sample of low-redshift (z < 0.1), X-ray selected clusters. Our focus on nearby objects allows us to study a well-defined, orientation unbias...