Properties of star formation in the spiral arms of barred galaxies
It is assumed that the two-fold disc-wide symmetry of spirals is caused by density waves, but also the potential of a bar component may have a significant...
Eleven years after the discovery of the first T dwarf, a population of ultracool L and T dwarfs has been identified that is large enough to show a range of...
Properties of the Warm Star Sample from SDSS-Data Release 4
The warm star sample (7000 Teff 10,000 K) in SDSS is comprised of field horizontal branch (FHB) stars and a large number of blue straggler (BS) stars. Because...
Properties of the Young Embedded Cluster G287.47-0.54 = Tr14-N4 in NGC 3372
New deep broad- and narrow-band (JHK and Br Gamma at 2.17 μm and H2 at 2.12 μm) images of the mid-infrared source G287.47-0.54 (Tr14-N4) are presented and...
Proposal and comparative study of a reducing algorithm for image sharpening techniques.
Image sharpening techniques applied to medium size telescopes (approximately 1 m) can improve their resolution by double. A new algorithm for recentering and...