ar X iv : a st ro - p h / 93 05 01 0 v 1 1 1 M ay 1 99 3 Mixed Dark Matter from Axino Distribution

ar X iv : a st ro - p h / 93 05 01 6 v 1 1 2 M ay 1 99 3 COMBUSTION GASDYNAMICS IN PROTO - NEUTRON STARS

The possible conversion of neutron matter to strange matter and its relevance to astrophysical problems are discussed. Particular attention is paid to the form in which this hypothetical " burning " process should be propagated in dense matter and to the moment when it should start.

ar X iv : a st ro - p h / 92 05 00 5 v 1 9 M ay 1 99 2 UCSBTH – 92 – 05 April 1992 CHAOTIC DARK MATTER

A very weakly coupled scalar field with mass m and initial vacuum expectation value V will provide enough mass to close the universe provided V ≃ (3 × 10 8 GeV)(100 GeV/m) 1/4. We discuss possible models in which such a field could arise. (a) Electronic address (internet): [email protected].

ar X iv : a st ro - p h / 05 01 13 3 v 2 2 7 M ay 2 00 5 1 Ultrahigh energy cosmic rays from collisional annihilation revisited

We re-examine collisional annihilation of superheavy dark matter particles in dark matter density spikes in the galactic halo as a possible source of ultrahigh energy cosmic rays. We estimate the possible flux in a way that does not depend on detailed assumptions about the density profiles of dark matter clumps. The result confirms that collisional annihilation is compatible with annihilation c...

ar X iv : a st ro - p h / 95 05 14 5 v 1 3 1 M ay 1 99 5 Search for GRB counterparts

ar X iv : a st ro - p h / 93 05 01 2 v 1 1 1 M ay 1 99 3 The Discovery of Two FU Orionis Objects in L 1641 Karen

We have obtained spectra of the reflection nebulosity illuminated by two heavily embedded IRAS sources in the L1641 molecular cloud, Re 50 and IC 430 (V883 Ori). Examination of these spectra in combination with their other properties indicates that these objects are FU Orionis objects. Our spectrum of L1551 IRS 5 confirms the FU Ori classification made for this star by Mundt et al. (1985). Subj...