Overview and initial results of the very long baseline interferometry space observatory programme

Hirabayashi H; Hirosawa H; Kobayashi H; Murata Y; Edwards PG; Fomalont EB; Fujisawa K; Ichikawa T; Kii T; Lovell JEJ; Moellenbrock GA; Okayasu R; Inoue M; Kawaguchi N; Kameno S; Shibata KM; Asaki Y; Bushimata T; Enome S; Horiuchi S; Miyaji T; Umemoto T; Migenes V; Wajima K; Nakajima J; Morimoto M; Ellis J; Meier DL; Murphy DW; Preston RA; Smith JG; Tingay SJ; Traub DL; Wietfeldt RD; Benson JM; Claussen MJ; Flatters C; Romney JD; Ulvestad JS; D'Addario LR; Langston GI; Minter AH; Carlson BR; Dewdney PE; Jauncey DL; Reynolds JE; Taylor AR; McCulloch PM; Cannon WH; Gurvits LI; Mioduszewski AJ; Schilizzi RT; Booth RS

Science, Vol.281, No.5384, 1825-1829, 1998

DOI10.1126/science.281.5384.1825 Export Citation

Overview and initial results of the very long baseline interferometry space observatory programme

Hirabayashi H, Hirosawa H, Kobayashi H, Murata Y, Edwards PG, Fomalont EB, Fujisawa K, Ichikawa T, Kii T, Lovell JEJ, Moellenbrock GA, Okayasu R, Inoue M, Kawaguchi N, Kameno S, Shibata KM, Asaki Y, Bushimata T, Enome S, Horiuchi S, Miyaji T, Umemoto T, Migenes V, Wajima K, Nakajima J, Morimoto M, Ellis J, Meier DL, Murphy DW, Preston RA, Smith JG, Tingay SJ, Traub DL, Wietfeldt RD, Benson JM, Claussen MJ, Flatters C, Romney JD, Ulvestad JS, D'Addario LR, Langston GI, Minter AH, Carlson BR, Dewdney PE, Jauncey DL, Reynolds JE, Taylor AR, McCulloch PM, Cannon WH, Gurvits LI, Mioduszewski AJ, Schilizzi RT, Booth RS

High angular resolution images of extragalactic radio sources are being made with the Highly Advanced Laboratory for Communications and Astronomy (HALCA) satellite and ground-based radio telescopes as part of the Very Long Baseline Interferometry (VLBI) Space Observatory Programme (VSOP). VSOP observations at 1.6 and 5 gigahertz of the milli-arc-second-scale structure of radio quasars enable the quasar core size and the corresponding brightness temperature to be determined, and they enable the motions of jet components that are close to the core to be studied. Here, VSOP images of the gamma-ray source 1156 + 295, the quasar 1548 + 056, the ultraluminous quasar 0014 + 813, and the superluminal quasar 0212 + 735 are presented and discussed.

Keywords:EXTRAGALACTIC RADIO-SOURCES;VLBI SURVEY;GHZ;SATELLITE;EVOLUTION;REDSHIFTS;EMISSION;MOTION;SCALE;JETS