SIMBAD references

2014ApJ...793L..20R - Astrophys. J., 793, L20 (2014/September-3)

2FGL J1653.6-0159: a new low in evaporating pulsar binary periods.


Abstract (from CDS):

We have identified an optical binary with orbital period Pb= 4488 s as the probable counterpart of the Fermi source 2FGL J1653.6-0159. Although pulsations have not yet been detected, the source properties are consistent with an evaporating millisecond pulsar binary; this Pb= 75 minutes is the record low for a spin-powered system. The heated side of the companion shows coherent radial-velocity variations, with amplitude K = 666.9±7.5 km/s for a large mass function of f(M) = 1.60±0.05 M. This heating suggests a pulsar luminosity ∼3x1034 erg/s. The colors and spectra show an additional blue component dominating at binary minimum. Its origin is, at present, unclear. This system is similar to PSR J1311-3430, with a low-mass H-depleted companion, a dense shrouding wind and, likely, a large pulsar mass.

Abstract Copyright:

Journal keyword(s): gamma rays: stars - pulsars: general

Simbad objects: 12

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