A model for a photoionized, conical jet from a young, massive star

作者：Raga A C^*; Canto J; Tinoco Arenas A; Rodriguez Ramirez J C; Rodriguez L F^*; Lizano S^*

来源：Monthly Notices of the Royal Astronomical Society, 2017, 471(4): 4920-4926.

DOI：10.1093/mnras/stx1938

• stars: formation
• ISM: evolution
• HII regions
• ISM: kinematics and dynamics

We consider a conical jet from a massive, young star, which also powers a compact HII region. The high density at the base of the jet traps the stellar, ionizing radiation, so that the jet beam is neutral (at larger distances). This neutral beam then becomes progressively photoionized by the diffuse, ionizing radiation field emitted by the surrounding HII region. We derive a simple, analytic model for this flow, and use it to calculate the contrast between the free-free emission of the jet and the background HII region. We find that for appropriate parameters, the jet is brighter by similar to 20 per cent, which should be relatively straightforward to detect in interferometric maps of regions around massive, young stars.

• 出版日期2017-11