Title

Surrounded by spiders! New black widows and redbacks in the Galactic field

Document Type

Conference Proceeding

Publication Date

8-1-2012

Abstract

Over the last few years, the number of known eclipsing radio millisecond pulsar systems in the Galactic field has dramatically increased, with many being associated with Fermi gamma-ray sources. All are in tight binaries (orbital period < 24 hr) with many being classical black widows which have very low mass companions (companion mass Mc ≠0.1 M ⊙) but some are redbacks with low mass (Mc ∼ 0.2-0.4 M ⊙) companions which are probably non-degenerate. These latter are systems where the mass transfer process may have only temporarily halted, and so are transitional systems between low mass X-ray binaries and ordinary binary millisecond pulsars. Here we review the new discoveries and their multi-wavelength properties, and briefly discuss models of shock emission, mass determinations, and evolutionary scenarios. © 2013 International Astronomical Union.

Publication Name

Proceedings of the International Astronomical Union

Volume Number

8

First Page

127

Last Page

132

Issue Number

S291

DOI

10.1017/S174392131202337X

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