ar X iv : a st ro - p h / 98 04 01 6 v 1 2 A pr 1 99 8 An Interferometric Search for Bright Companions to 51 Pegasi

ar X iv : a st ro - p h / 98 04 15 2 v 1 1 6 A pr 1 99 8 New aspects in the theory of magnetic winds from massive hot stars

ar X iv : a st ro - p h / 98 04 02 2 v 1 2 A pr 1 99 8 Birth and early evolution of a planetary nebula

ar X iv : a st ro - p h / 98 04 16 8 v 2 20 A pr 1 99 8 COSMIC COMPLEMENTARITY : COMBINING CMB AND SUPERNOVA OBSERVATIONS

We compute the accuracy with which Ωm and ΩΛ can be measured by combining future SN Ia and CMB experiments, deriving a handy expression for the SN Ia Fisher information matrix. The two data sets are found to be highly complementary: a joint analysis reduces the error bars by more than an order of magnitude compared to a separate analysis of either data set.

ar X iv : a st ro - p h / 04 02 16 8 v 1 7 F eb 2 00 4 A search for wide ( sub ) stellar companions around extrasolar planet host stars

We present an overview of our ongoing systematic search for wide (sub)stellar companions around the stars known to host rad-vel planets. By using a relatively large field of view and going very deep, our survey can find all directly detectable stellar and massive brown dwarf companions (m>40 MJup) within a 1000 AU orbit.

ar X iv : h ep - p h / 98 04 40 7 v 1 2 6 A pr 1 99 8 B c → l ν̄γ DECAY IN LIGHT CONE QCD