ar X iv : a st ro - p h / 98 10 38 9 v 1 2 3 O ct 1 99 8 Is Dark Matter made up of Massive Quark Objects ? 1

ar X iv : a st ro - p h / 98 10 37 9 v 1 2 3 O ct 1 99 8 Supermassive Black Holes Then and Now ∗

Recent surveys suggest that most or all normal galaxies host a massive black hole with 1/100 to 1/1000 of the visible mass of the spheroid of the galaxy. Various lines of argument suggest that these galaxies have merged at least once in our past lightcone, and that the black holes have also merged. This leads to a merger rate of massive black holes of about 1/yrs.

ar X iv : a st ro - p h / 98 10 37 1 v 1 2 2 O ct 1 99 8 ELLIPTICAL GALAXY DYNAMICS

ar X iv : h ep - p h / 98 10 33 5 v 1 1 3 O ct 1 99 8 Gamma - Ray Bursts and Dark Matter - a joint origin ?

ar X iv : a st ro - p h / 98 10 06 9 v 1 5 O ct 1 99 8 The Mass and Extent of the Galactic Halo

We review the various techniques used to constrain the Galactic halo mass profile for radii ∼> 20 kpc with particular emphasis on identifying a self-consistent halo model and resolving the apparent discrepancies present in the literature on this subject. We collate published results and demonstrate that they are all consistent with a Galactic halo that is nearly isothermal with a characteristic...

ar X iv : a st ro - p h / 98 02 02 8 v 1 3 F eb 1 99 8 Phase Transitions in Neutron Stars

Phase transitions in neutron stars due to formation of quark matter, kaon condensates, etc. are discussed with particular attention to the order of these transitions. Observational consequences of phase transitions in pulsar angular velocities are examined.