ar X iv : a st ro - p h / 98 04 15 9 v 1 1 6 A pr 1 99 8 Far

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 11 9 v 1 1 3 A pr 1 99 8 ApJL

Gamma ray burst outflows may entrain small blobs or filaments of dense, highly ionized metal rich material. Such inhomogeneities, accelerated by the flow to Lorentz factors in the range 10-100, could have a significant coverage factor, and give rise to broad features, especially due to Fe K-edges, which influence the spectrum below the MeV range, leading to a progressively decreasing hardness r...

ar X iv : a st ro - p h / 99 04 21 3 v 1 1 6 A pr 1 99 9 High Energy Cosmic Neutrinos Astronomy : The ANTARES Project ‡

Neutrinos may offer a unique opportunity to explore the far Universe at high energy. The ANTARES collaboration aims at building a large undersea neutrino detector able to observe astrophysical sources (AGNs, X-ray binary systems, ...) and to study particle physics topics (neutrino oscillation, ...). After a description of the research opportunities of such a detector, a status report of the exp...

ar X iv : a st ro - p h / 99 04 24 4 v 1 1 9 A pr 1 99 9 Is SGR 1900 + 14 a Magnetar ?

We present RXTE observations of the soft gamma–ray repeater SGR

ar X iv : a st ro - p h / 98 04 15 8 v 1 1 6 A pr 1 99 8 Constraints on Cosmological Parameters from Existing CMB Data

We use current cosmic microwave background data to constrain cosmological parameters. The results are presented as confidence regions in the (Ω–Ho) – plane for both open and flat geometries, and are based on a χ 2 minimization to the power spectrum. Although such an approach does not strictly apply to power spectrum estimates, the results should nonetheless be indicative. We find that purely op...