ar X iv : a st ro - p h / 06 05 70 2 v 1 2 9 M ay 2 00 6 Molecular Gas Dynamics in NGC 6946 : a Bar - driven Nuclear

ar X iv : a st ro - p h / 06 05 06 7 v 1 2 M ay 2 00 6 Sensitivity and pointing accuracy of the NEMO km 3 telescope

ar X iv : a st ro - p h / 99 05 15 0 v 1 1 2 M ay 1 99 9 When SN explode in a starburst : trasitions among AGN types

Among the Active Galactic Nuclei (AGN) that have suffered type mutations, the classically classified Seyfert 2 NGC 7582 recently found at a Seyfert 1 stage, is perhaps one of the most puzzling cases, since it defies a well supported case for unification. We investigate the possibility that this type transition, common to other 12 AGN, is driven by supernovae (SN) exploding in a nuclear/circumnu...

ar X iv : a st ro - p h / 02 04 13 3 v 1 8 A pr 2 00 2 Towards the Secondary Bar : Gas Morphology and Dynamics in NGC 4303

We report on the molecular gas properties in the central kiloparsec of the almost face-on double barred galaxy NGC 4303 (M 61), using the CO 1−0 line emission observed with the Owens Valley Radio Observatory (OVRO) millimeter interferometer. The bulk of the molecular line emission comes from two straight gas lanes which run north-south along the leading sides of the large-scale primary bar. Vel...

ar X iv : a st ro - p h / 99 05 03 1 v 1 5 M ay 1 99 9 Gas Dynamics in the Luminous Merger NGC 6240

We report 0. ′′ 5 × 0. ′′ 9 resolution, interferometric observations of the 1.3 mm CO J=2→1 line in the infrared luminous galactic merger NGC 6240 2. About half of the CO flux is concentrated in a rotating but highly turbulent, thick disk structure centered between the two radio and near-infrared nuclei. A number of gas features connect this ∼500 pc diameter central disk to larger scales.

ar X iv : a st ro - p h / 06 05 39 7 v 1 16 M ay 2 00 6 An Investigation of Be / X - ray Pulsars with OGLE - III Data

Received ; accepted – 2 – ABSTRACT We have studied five seasons of OGLE-III data for eight SMC Be/X-ray pulsars for which no other survey data were available. We have determined orbital periods for four of these binary systems, one of which also shows nonradial pulsations. Optical identification of SMC X-2 is reconsidered, but no periods were found for either of the two possible candidates.