ar X iv : a st ro - p h / 05 11 12 1 v 1 4 N ov 2 00 5 Mass

ar X iv : a st ro - p h / 06 11 49 4 v 1 1 5 N ov 2 00 6 MOND rotation curves of very low mass spiral galaxies

We present MOND analysis for several of the lowest mass disc galaxies currently amenable to such analysis–with (baryonic) masses below 4 · 108M⊙. The agreement is good, extending the validity of MOND and its predicted mass velocity relation, to such low masses. Subject headings: dark matter galaxies: kinematics and dynamics

ar X iv : a st ro - p h / 01 11 13 6 v 1 7 N ov 2 00 1 1 Active Optics in Modern , Large Optical Telescopes

ar X iv : a st ro - p h / 06 11 54 4 v 1 1 6 N ov 2 00 6 Discovery of a nearby twin of SN 1987 A ’ s nebula around the

ar X iv : a st ro - p h / 05 11 83 5 v 1 3 0 N ov 2 00 5 Binaries with total eclipses in the LMC : potential targets for spectroscopy

35 Eclipsing binaries presenting unambiguous total eclipses were selected from a subsample of the list of Wyrzykowski et al. (2003). The photometric elements are given for the I curve in DiA photometry, as well as approximate Teff and masses of the components. The interest of these systems is stressed in view of future spectroscopic observations.

ar X iv : a st ro - p h / 03 11 44 5 v 1 1 9 N ov 2 00 3 Multiscale self - organized criticality and powerful X - ray flares

A combination of spectral and moments analysis of the continuous X-ray flux data is used to show consistency of statistical properties of the powerful solar flares with 2D BTW prototype model of self-organized criticality.