ar X iv : a st ro - p h / 05 06 29 8 v 1 1 4 Ju n 20 05 The application of slim disk models to ULX : the case of M 33 X - 8

ar X iv : a st ro - p h / 05 06 44 9 v 4 1 9 Ju n 20 06 Can a dust dominated universe have accelerated expansion ?

Recently, there has been suggestions that the apparent accelerated expansion of the universe is due not to a cosmological constant, but rather to inhomogeneities in the distribution of matter. In this work, we investigate a specific class of inhomogeneous models that can be solved analytically, namely the dust-dominated Lemâitre-Tolman-Bondi universe models. We show that they do not permit acce...

ar X iv : a st ro - p h / 05 06 38 2 v 1 1 6 Ju n 20 05 The disk vanishes

Recently published observations of VY Scl stars in their low, long-intermediate and high states confirm our model (Hameury & Lasota 2002) according to which accretion disks in such systems must vanish when their temperature corresponds to thermally unstable configurations. An observational confirmation of the hypothesis that the disk disappearance is caused by magnetic effects would have import...

ar X iv : a st ro - p h / 05 06 28 8 v 1 1 3 Ju n 20 05 A Deep Infrared Search for AXP 1 E 1841 − 045

Multi-colour (JHKS) imaging and photometry of the field of the Anomalous X-ray Pulsar AXP 1E 1841−045 is analysed in the light of new, accurate coordinates from Chandra (Wachter et al, 2004). From excellent quality images, we find multiple sources in and around the position error circle. Of these, none can be confidently identified as the infrared counterpart. The limiting magnitudes reached we...

ar X iv : a st ro - p h / 04 06 56 7 v 1 2 4 Ju n 20 04 1

ar X iv : a st ro - p h / 00 06 29 0 v 1 2 1 Ju n 20 00 Gas Rich Dwarfs from the PSS - II III . H I Profiles and Dynamical Masses

We present Arecibo neutral hydrogen data on a sample of optically selected dwarf galaxies.