ar X iv : a st ro - p h / 01 06 35 9 v 1 2 0 Ju n 20 01 The Interstellar Environment of our Galaxy

ar X iv : h ep - p h / 01 06 21 1 v 1 1 9 Ju n 20 01 Interference effects in the decay φ → π 0 π 0 γ and the coupling constant g

ar X iv : a st ro - p h / 01 05 53 8 v 1 3 0 M ay 2 00 1 Circumnuclear stellar population , morphology and environment of Seyfert 2 galaxies : an evolutionary scenario

We investigate the relation between the characteristics of the circumnuclear stellar population and both the galaxy morphology and the presence of close companions for a sample of 35 Seyfert 2 nuclei. Fifteen galaxies present unambiguous signatures of recent episodes of star formation within ≈300 pc from the Jansky Fellow Gemini Fellow

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 / 01 06 23 3 v 1 1 3 Ju n 20 01 Nuclear gas dynamics in Arp 220 − sub - kiloparsec scale atomic hydrogen disks

We present new, high angular resolution (∼0. ′′ 22) MERLIN observations of neutral hydrogen (H i) absorption and λ21-cm radio continuum emission across the central ∼900 parsecs of the ultraluminous infrared galaxy, Arp220. Spatially resolved H i absorption is detected against the morphologically complex and extended λ21-cm radio continuum emission, consistent with two coun-terrotating disks of ...

ar X iv : a st ro - p h / 01 06 20 5 v 1 1 2 Ju n 20 01 Experimental Limit to Interstellar 244 Pu Abundance

Short-lived nuclides, now extinct in the solar system, are expected to be present in the interstellar medium (ISM). Grains of ISM origin were recently discovered in the inner solar system and at Earth orbit and may accrete onto Earth after ablation in the atmosphere. A favorable matrix for detection of such extraterrestrial material is presented by deep open-sea sediments with very low sediment...