ar X iv : a st ro - p h / 06 02 40 0 v 2 18 A ug 2 00 6 Stellar Orbit Constraints on Neutralino Annihilation at the Galactic Center

ar X iv : a st ro - p h / 00 08 06 3 v 1 3 A ug 2 00 0 1

Introducing a simple Galactic wind model patterned after the solar wind we show that back-tracing the orbits of the highest energy cosmic events suggests that they may all come from the Virgo cluster, and so probably from the active radio galaxy M87. This confirms a long standing expectation. Those powerful radio galaxies that have their relativistic jets stuck in the interstellar medium of the...

ar X iv : a st ro - p h / 06 10 24 6 v 1 9 O ct 2 00 6 Special Features of Galactic Dynamics

ar X iv : a st ro - p h / 02 03 24 2 v 1 1 5 M ar 2 00 2 Particle Dark Matter Constraints from the Draco Dwarf Galaxy

It is widely thought that neutralinos, the lightest supersymmetric particles, could comprise most of the dark matter. If so, then dark halos will emit radio and gamma ray signals initiated by neutralino annihilation. A particularly promising place to look for these indicators is at the center of the local group dwarf spheroidal galaxy Draco, and recent measurements of the motion of its stars ha...

ar X iv : a st ro - p h / 06 08 29 8 v 1 15 A ug 2 00 6 Extrasolar Planets : A Galactic Perspective

The host stars of extrasolar planets tend to be metal-rich. We have examined the data for these stars for evidence of trends in other galactic parameters, without success. However, several ESP hosts are likely to be members of the thick disk population, indicating that planet formation has occurred throughout the full lifetime of the Galactic disk. We briefly consider the radial metallicity gra...

ar X iv : a st ro - p h / 04 08 56 1 v 1 3 0 A ug 2 00 4 The Nature of the Variable Galactic Center Source IRS

We report measurements of the light curve of the variable Galactic Center source IRS16SW. The light curve is not consistent with an eclipsing binary or any other obvious variable star. The source may be an example of a high mass variable predicted theoretically but not observed previously.