ALMA observations of the Extended Green Object G19.01−0.03 – I. A Keplerian disc in a massive protostellar system

Gwenllian M. Williams,Claudia J. Cyganowski,Crystal L. Brogan,Todd R. Hunter,John D. Ilee,Pooneh Nazari,J. M. Diederik Kruijssen,Rowan J. Smith,Ian A. Bonnell

Monthly Notices of the Royal Astronomical Society（2021）

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摘要

Using the Atacama Large Millimetre/submillimeter Array (ALMA) and the Karl G. Jansky Very Large Array (VLA), we observed the Extended Green Object (EGO) G19.01−0.03 with sub-arcsec resolution from 1.05 mm to 5.01 cm wavelengths. Our ∼0.4 arcsec ∼ 1600 au angular resolution ALMA observations reveal a velocity gradient across the millimetre core MM1, oriented perpendicular to the previously known bi...

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关键词

masers,techniques: interferometric,stars: formation,stars: individual: G19.01−0.03,stars: massive,stars: protostars

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