Astronomy and Astrophysics – Astronomy
Scientific paper
May 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.7402m&link_type=abstract
American Astronomical Society, 192nd AAS Meeting, #74.02; Bulletin of the American Astronomical Society, Vol. 30, p.930
Astronomy and Astrophysics
Astronomy
Scientific paper
Recently, the sample of relativistic galactic jet sources has almost doubled. These sources are usually seen in X-ray binaries, where a ``normal'' star is accreting onto a black hole or neutron star. The new Galactic jet source, CI Cam, however, is a symbiotic star (i.e. a Be star with a companion). All these sources show a link between high energy emission in the X-ray and the occurrence of radio emission and the ejection of jets. SS433 was the first, and still in many ways the best known, example of a relativistic radio jet in our own Galaxy. As in the classical extragalactic jets, individual components trace out a helical path as they move away from a compact core with speeds of order the speed of light. We will present Very Long Baseline Interferometry (VLBI) images of SS433, observed on three consecutive days at 3 frequencies. This data gives daily coverage of the evolution of the jet, allowing an examination of the dynamics and the flux variations of the individual components. CI Cam flared to 2 Crab in the X-ray on 1 April 1998; subsequent radio observations showed that this bright flare was associated with the appearance of a radio source at the position of CI Cam. We will present VLBI images of CI Cam observed one and three days after its X-ray flare. An image from the first epoch indicates the presence of a jet.
Hjellming Robert M.
Mioduszewski Amy J.
Rupen Michael P.
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