Searcharxiv⌕ Search

arXiv subjects

David Eichler

Publications and source records attributed to David Eichler.

74 records · Page 5Linked to original sources

Radiation Dosimetry of Binary Pulsars

Companion stars exposed to high energy radiation from a primary neutron star or accreting black hole can experience significant spallation of their heavy elements, so that their atmospheres would be extremely rich in lithium, beryllium, and especially boron. In this paper we note that the detection or non-detection of these elements, and their relative abundances if detected, would provide a diagnostic of the high energy output of the primary, and possibly the shock acceleration of particles at the companion's bow shock in a pulsar wind.

astro-ph↗

A Possible Forest of Emission Lines from Proto-galaxies

The possibility of detecting proto-galaxies in the UV band is pointed out, assuming that galaxy formation occured at z $\sim 5-6$. It is shown that the diffuse gas in collapsing galaxy sized objects with temperatures $\sim 10^{6\pm0.5}$ K, and with a modest amount of metallicity, should copiously produce emission lines from highly ionized Iron atoms. The expected luminosity from models of galaxy formation is compared with the sensitivity of HST.

astro-ph↗