We study the kinematics of the barred spiral galaxy NGC 6946 by investigating the velocity field from Hα Fabry-Perot observations, determine the pattern speed...
We present a detailed study of the edge-on S0 galaxy NGC7332. We show that this object lies significantly below the fundamental plane of early-type galaxies. To...
The peculiar O9.5V star BD+53°2790, the massive counterpart to the X-ray binary system 4U 2206+54
The X-ray binary system 4U 2206+54 hides many mysteries. Among them, the surprising behavior of both of its co components: the O9.5 dwarf star BD+53°2790 and a...
We present BVR photometric observations of PKS 0736+017. Variations with different timescales and amplitudes were observed. Throughout our observations, an...
The Penn State - TCfA Search for Planets Around Evolved Stars
We describe the status of our long-term radial velocity (RV) survey of a sample of 1000 GK-giants with the 9.2-m Hobby-Eberly Telescope and its High Resolution...
The Pennsylvania--Toruń Planet Search: Target Characteristics and Recent Results
More than 450 stars hosting planets are known today but only approximately 30 planetary systems were discovered around stars beyond the Main Sequence. The...
The Pennsylvania-Toruń search for planets around evolved stars with HET
Searches for planets around giants represent an essential complement to 'traditional' surveys, because they furnish information about properties of planetary...