Rapid expansion in the VLBI structure of LSI+61(circ) 303

Details Rapid expansion in the VLBI structure of LSI+61(circ) 303 Rapid expansion in the VLBI structure of LSI+61(circ) 303

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...330..612p&link_type=abstract

Astronomy and Astrophysics, v.330, p.612-618 (1998)

Astronomy and Astrophysics

Astrophysics

11

Scientific paper

We present the results of global VLBI observations at 6cm wavelength of the X-ray binary LSI+61(deg) 303 made at epoch 1992.4. During the course of our 24 hour VLBI observing session, the integrated flux measured simultaneously with the VLA indicated that the source was experiencing a minor flare, with the total flux rising and falling by ~ 12 mJy. Our VLBI observations indicate that this brightening occurred on milli-arcsecond scales, and was accompanied by an increase of the compact radio structure size with velocity ~ 0.06 c, which appeared to decelerate rapidly upon reaching a dimension of about 4 AU.

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