A Search for Pulsed and Bursty Radio Emission from X-ray Dim Isolated Neutron Stars
V.I. Kondratiev (WVU, NRAO), M. Burgay (INAF, Osservatorio Astronomico, di Cagliari), A. Possenti (INAF, Osservatorio Astronomico di Cagliari), M.A., McLaughlin (WVU), D.R. Lorimer (WVU), R. Turolla (Universita di Padova), S., Popov (Sternberg Astronomical Institute)
TL;DR
This study conducted the most sensitive search to date for pulsed and bursty radio emissions from six X-ray dim isolated neutron stars using the Green Bank Telescope, but found no radio signals.
Contribution
It provides the first deep radio flux limits for XDINSs, constraining models of their emission mechanisms.
Findings
No radio emission detected from the six XDINSs.
Flux limits range from 0.01 to 0.04 mJy.
Results set new constraints on radio emission from XDINSs.
Abstract
We have carried out a search for radio emission from six X-ray dim isolated neutron stars (XDINSs) observed with the Robert C. Byrd Green Bank Radio Telescope (GBT) at 820 MHz. No bursty or pulsed radio emission was found down to a 4sigma significance level. The corresponding flux limit is 0.01-0.04 mJy depending on the integration time for the particular source and pulse duty cycle of 2%. These are the most sensitive limits yet on radio emission from these objects.
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