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

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 / 95 05 14 5 v 1 3 1 M ay 1 99 5 Search for GRB counterparts

ar X iv : a st ro - p h / 99 07 39 5 v 1 2 8 Ju l 1 99 9 NICMOS Observations of Interaction Triggered Star Formation in the Luminous Infrared Galaxy NGC

High resolution, 1.1, 1.6, and 2.2 μm imaging of the luminous infrared galaxy NGC 6090 obtained with NICMOS of the Hubble Space Telescope are presented. These new observations are centered on the two nuclei of the merger, and reveal the spiral structure of the eastern galaxy and the amorphous nature of the western galaxy. The nuclear separation of 3.2 kpc (H0 = 75 kms −1 Mpc) indicates that NGC...

ar X iv : a st ro - p h / 05 07 16 3 v 1 7 J ul 2 00 5 Dense and Warm Molecular Gas between Double Nuclei of the Luminous Infrared Galaxy NGC 6240

High spatial resolution observations of the CO(1–0), HCN(1–0), HCO(1–0), and CO(1–0) molecular lines toward the luminous infrared merger NGC 6240 have been performed using the Nobeyama Millimeter Array and the RAINBOW Interferometer. All of the observed molecular emission lines are concentrated in the region between the double nuclei of the galaxy. However, the distributions of both HCN and HCO...

ar X iv : a st ro - p h / 99 05 37 6 v 1 2 8 M ay 1 99 9 A 6 . 4 - hr positive superhump period in TV