QSO B0153+744

The radio source of QSO B0153+744 is found to be both one-sided^[5] and complex.^[6] However, when shown at both frequencies, it is revealed as double source that is embedded inside a halo.^[7] In its radio structure, the 15.4 GHz emission is found to be dominated by two main components with a separation gap of 10 milliarcseconds.^[5] These two main components are classified as the northern component and southern component respectively. The northern component contains an inverted spectrum whereas the southern component has a steep spectra.^[7]

In 1997, these two components of QSO B0153+744 were studied further. This in turn, were confirmed as a jet-core component and a bright secondary component. The former shows core-jet structure made up of four distinctive components, when resolved at 1.3 centimeter (cm) wavelengths whereas the latter is stationary and exhibits a complicated structure. Further evidence shows the spectral index of the bright component's emission is near to one of the steep-spectrum jet components at ranges between 6 cm and 3.6 cm.^[2]

A strong one-sided jet is present in QSO B0153+744 with its projected direction changing by an 180° angle.^[8][2] There are three other sub-components present (the jet's innermost regions). The two sub-components are shown trailing the jet's direction with a switch of 65° ± 3° at distance r = (0.65 ± 0.05) mas to 88° ± 8° at distance r = (1.35 ± 0.05) mas, while the third sub-component is trailing the jet's outermost regions.^[5] Based on the jet's speed and its change of direction, this indicates the radio source of QSO B0153+744 is relatively young.^[9]

• QSO B0153+744 on SIMBAD
• QSO B0153+744 on NASA/IPAC Database