SIMBAD references

2019ApJ...872...64K - Astrophys. J., 872, 64-64 (2019/February-2)

Extremely high excitation SiO lines in disk-outflow systems in Orion Source I.

KIM M.K., HIROTA T., MACHIDA M.N., MATSUSHITA Y., MOTOGI K., MATSUMOTO N. and HONMA M.

Abstract (from CDS):

We present high-resolution images of the submillimeter SiO line emissions of a massive young stellar object Orion Source I using the Atacama Large Millimeter/submillimeter Array at band 8. We detected the 464 GHz SiO v = 4 J = 11-10 line in Source I, which is the first detection of the SiO v = 4 line in star-forming regions, together with the 465 GHz 29SiO v = 2 J = 11-10 and the 428 GHz SiO v = 2 J = 10-9 lines with a resolution of 50 au. The 29SiO v = 2 J = 11-10 and SiO v = 4 J = 11-10 lines have compact structures with a diameter of <80 au. The spatial and velocity distributions suggest that the line emissions are associated with the base of the outflow and the surface of the edge-on disk. In contrast, SiO v = 2 J = 10-9 emission shows a bipolar structure in the direction of northeast-southwest low-velocity outflow with a ∼200 au scale. The emission line exhibits a velocity gradient along the direction of the disk elongation. With the assumption of the ring structure with Keplerian rotation, we estimated the lower limit of the central mass to be 7 M and the radius to be 12 au < r < 26 au.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): ISM: individual objects: Orion KL - radio continuum: stars - stars: individual: Orion Source I - stars: formation

Simbad objects: 12

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2019ApJ...872...64K and select 'bookmark this link' or equivalent in the popup menu


2019.11.20-22:09:43

© Université de Strasbourg/CNRS

    • Contact