New Black Widows and Redbacks in the Galactic Field
Abstract
There has recently been a large increase in the number of known eclipsing radio millisecond pulsars in the Galactic field, many of which are associated with Fermi gamma-ray sources. All are in tight binaries (Pb < 24hr) many of which are classical "black widows" with very low mass companions (Mc << 0.1 Msol) but some are "redbacks" with probably non-degenerate low mass companions (Mc ~ 0.2 Msol). I review the new discoveries, briefly discuss the distance uncertainties and the implications for high-energy emission.
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