Physical parameters of a relativistic jet at very high redshift: the case of the blazar J1430+4204
Physical parameters of a relativistic jet at very high redshift: the case of the blazar J1430+4204
<i>Context. <i/>The high-redshift (<i>z<i/> = 4.72) blazar J1430+4204 produced a major radio outburst in 2005. Such outbursts are usually associated with the emergence of a new component in the inner radio jet.<i>Aims. <i/>We searched for possible changes in the radio structure on milli-arcsecond angular scales, to determine physical parameters that …