7 papers · 1 filter
Are There ADAFs in Nearby Giant Elliptical Galaxies?
Martin E. Sulkanen, Joel N. Bregman
Recently it has been suggested that the hard x-ray power-law tails exhibited in the ASCA spectra of several nearby giant elliptical galaxies are caused by low-radiative efficiency…
Dwarf Galaxies in Clusters: the Effects of a Violent Environment
Omar Lopez-Cruz, H. K. C. Yee
Recent observations suggest that dwarf galaxies pervade the universe, for they have been encountered in large numbers in all the environments. However, we present evidence that sug…
Photometric Properties of Low-Redshift Galaxy Clusters (LOCOS)
Omar Lopez-Cruz
A comprehensive multicolor survey was undertaken to investigate global optical properties of Abell clusters of galaxies. This survey was christened the "Low-Redshift Cluster Optica…
Damped Lyman alpha systems at z=0.68 and z=1.15 towards HE 1122-1649 and HE 0515-4414
A. de la Varga, D. Reimers, D. Tytler +2
Detailed analysis of the spectral lines from two low redshift damped Lyman alpha absorbers (DLA) confirms that they are a heterogeneous population. Both systems have low metal abun…
Kinematics and morphology of the Narrow-Line Region in the Seyfert galaxy NGC1386
J. Rossa, M. Dietrich, S. J. Wagner
We present a high spatial and spectral resolution 2-D echelle spectrogram of the Narrow-Line Region in the Seyfert 2 galaxy NGC1386. This Seyfert galaxy was observed with CASPEC in…
Formation of binary millisecond pulsars with relatively high surface dipole magnetic fields
W. Sutantyo, X. -D. Li
We have carried out numerical evolutionary calculations of binary systems to investigate the formation of binary millisecond pulsars (pulsars with white dwarf companions). We apply…