Milliarcsecond radio structure of LS I +61 deg 303

Details Milliarcsecond radio structure of LS I +61 deg 303 Milliarcsecond radio structure of LS I +61 deg 303

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...335..539p&link_type=abstract

Astronomy and Astrophysics, v.335, p.539-544 (1998)

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Stars: Individual: Ls I +61(Deg) 303, Stars: Variables: Other, Radio Continuum: Stars, X-Rays: Stars, Techniques: Interferometric

Scientific paper

We present results of two-epoch intercontinental VLBI observations at 6 cm wavelength of LS I +61(deg) 303 during an outburst in 1993. In the first epoch, the total flux density of LS I +61(deg) 303 varied from 76 to 131 mJy and the derived size of the emitting region was about 3 mas. In the second epoch, four days later, the flux density of LS I +61(deg) 303 was very stable, at a level of 60 mJy. The flux stability along all the second session allowed us to carry out standard hybrid mapping. The VLBI map obtained exhibits an extended structure of about 7 mas with an unresolved component at the center of the extended structure. The results derived from both observing sessions seem to agree with a source expanding with time from 2-3 to 7 mas, at a velocity of ~ 2200 km s(-1) . In addition, our results suggest the existence of a quiescent component associated with the core.

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