ar X iv : a st ro - p h / 06 05 72 8 v 1 30 M ay 2 00 6 The Spiral Structure of the Outer Milky Way in Hydrogen

ar X iv : a st ro - p h / 06 05 06 7 v 1 2 M ay 2 00 6 Sensitivity and pointing accuracy of the NEMO km 3 telescope

ar X iv : a st ro - p h / 06 05 25 2 v 1 10 M ay 2 00 6 Tidal tails around globular clusters : are they good tracers of cluster orbits ?

In the last decade, observational studies have shown the existence of tidal streams in the outer part of many galactic globular clusters [6, 7]. The most striking examples of clusters with well defined tidal tails are represented by Palomar 5 [9] and NGC 5466 [2] (both observed in the framework of the Sloan Digital Sky Survey), which show structures elongated for 4 kpc and 1 kpc in length, resp...

ar X iv : a st ro - p h / 06 05 70 2 v 1 2 9 M ay 2 00 6 Molecular Gas Dynamics in NGC 6946 : a Bar - driven Nuclear

We present high angular resolution (∼ 1 and 0.6) mm-interferometric observations of the CO(1− 0) and CO(2− 1) line emission in the central 300 pc of the late-type spiral galaxy NGC6946. The data, obtained with the IRAM Plateau de Bure Interferometer (PdBI), allow the first detection of a molecular gas spiral in the inner ∼ 10 (270 pc) with a large concentration of molecular Based on observation...

ar X iv : m at h / 06 05 35 5 v 1 [ m at h . G R ] 1 3 M ay 2 00 6 Axes in Outer Space

ar X iv : a st ro - p h / 06 05 39 7 v 1 16 M ay 2 00 6 An Investigation of Be / X - ray Pulsars with OGLE - III Data

Received ; accepted – 2 – ABSTRACT We have studied five seasons of OGLE-III data for eight SMC Be/X-ray pulsars for which no other survey data were available. We have determined orbital periods for four of these binary systems, one of which also shows nonradial pulsations. Optical identification of SMC X-2 is reconsidered, but no periods were found for either of the two possible candidates.