We report on time series Hα profiles of the late B-type supergiant Rigel (beta Orionis A). Our observations indicate the presence of variable and asymmetric outflows and infalls of matter. We have recorded a blueshifted high-velocity absorption component in Hα almost simultaneously with Kaufer et al. The final part of this extraordinary event has

Detailed line profiles from the nebular gas surrounding the radio galaxy 3C 227 are presented. High-resolution spectroscopy around [O iii] 4959- and 5007-A emission lines, with an unprecedentedly high signal-to-noise ratio, reveals broad and asymmetric line profiles all across the nebulae. The average width of the line complex is of the order of

We calculate the one loop corrections to the chromomagnetic dipole moment of the top quark in the framework of the Standard Model, the two Higgs doublet model and the Minimal Supersymmetric Standard Model. In the Standard Model we consider the QCD and the electroweak corrections generated by gluon and Higgs boson exchanges, respectively. In the

AG Carinae is a massive, evolved supergiant which is thought to be in transition from an O star to a Wolf-Rayet (WR) star and is currently identified as a luminous blue variable (LBV) with logL/solar=6.0. We present an abundance study of the ejecta nebula surrounding AG Car with the aim of elucidating the evolutionary history of the central star

We present results of intermediate resolution spectroscopy of 131 optical counterparts to 115 ROSAT All-Sky Survey X-ray sources south of the Taurus-Auriga dark cloud complex. These objects have been selected as candidate young stars from a total of 1084 ROSAT sources in a ~300 square degree area. We identify 30 objects as low-mass PMS stars on the

We present one new radio identification and one confirmation of two high-latitude gamma-ray sources detected by CGRO-EGRET, based on flux density measurements at 1.3 mm (Caltech Submillimeter Observatory2) and 1.3 cm (Metsähovi Research Station) of objects in the EGRET error boxes. We identify EGRET sources 10744+5438 and J1239+044l with 87GB