ar X iv : a st ro - p h / 96 03 02 5 v 1 6 M ar 1 99 6 The Pulsating Pre – White Dwarf Star PG 0122 + 200

ar X iv : a st ro - p h / 96 08 03 6 v 1 8 A ug 1 99 6 TABLE 1 Properties of LMC Double - Mode

ar X iv : a st ro - p h / 96 06 03 6 v 1 6 J un 1 99 6 Atmospheric , Evolutionary , and Spectral Models of the Brown Dwarf Gliese 229 B

Theoretical spectra and evolutionary models that span the giant planet–brown dwarf continuum have been computed based on the recent discovery of the brown dwarf, Gliese 229 B. A flux enhancement in the 4–5 micron window is a universal feature from Jovian planets to brown dwarfs. We confirm the existence of methane and water in Gl 229 B's spectrum and find its mass to be 30 to 55 Jovian masses. ...

ar X iv : a st ro - p h / 96 12 02 8 v 1 3 D ec 1 99 6 DWARF SPHEROIDAL

The Milky Way is surrounded by nine or more dwarf-spheroidal (dSph) satellite galaxies that appear to consist primarily of dark matter. Here I summarise research that shows that initially spherical bound low-mass satellites without dark matter, that are on orbits within a massive Galactic dark corona, can evolve into remnants that are non-spherical, have a non-isotropic velocity dispersion tens...

ar X iv : a st ro - p h / 96 08 03 6 v 2 1 2 A ug 1 99 6 TABLE 1 Properties of LMC Double - Mode

ar X iv : a st ro - p h / 96 02 00 6 v 1 1 F eb 1 99 6 IMPLICATIONS OF WHITE DWARF GALACTIC HALOS

Motivated by recent measurements which suggest that roughly half the mass of the galactic halo may be in the form of white dwarfs, we study the implications of such a halo. We first use current limits on the infrared background light and the galactic metallicity to constrain the allowed initial mass function (IMF) of the stellar population that produced the white dwarfs. The IMF must be sharply...