Relativistic motion in a nearby bright X-ray source

Details Relativistic motion in a nearby bright X-ray source Relativistic motion in a nearby bright X-ray source

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995natur.374..141t&link_type=abstract

Nature, Volume 374, Issue 6518, pp. 141-143 (1995).

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Scientific paper

The recent discovery1 of radio components apparently moving away from a Galactic source of transient X-ray emission faster than the speed of light (superluminal motion) has identified a low-energy Galactic counterpart to quasars. Here we report high-resolution radio observations of a second Galactic superluminal radio source GRO J1655-40, which was detected as an X-ray transient2 on 27 July 1994. Our radio images reveal two components moving away from each other at an angular speed of 65 +/- 5 mas d-1, corresponding to superluminal motion at the estimated distance of 3-5 kpc. The 12-day delay between the X-ray and radio outbursts suggests that the ejection of material at relativistic speeds occurs during a stable phase of accretion onto a black hole, which follows an unstable phase with a high accretion rate.

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