Disks and outflows in the S255IR area of high mass star formation from ALMA observations

Abstract

We describe the general structure of the well known S255IR high mass star forming region, as revealed by our recent ALMA observations. The data indicate a physical relation of the major clumps SMA1 and SMA2. The driving source of the extended high velocity well collimated bipolar outflow is not the most pronounced disk-like SMA1 clump harboring a 20 M${}_{\odot }$ young star (S255 NIRS3), as it was assumed earlier. Apparently it is the less evolved SMA2 clump, which drives the outflow and contains a compact rotating structure (probably a disk). At the same time the SMA1 clump drives another outflow, with a larger opening angle. The molecular line data do not show an outflow from the SMA3 clump (NIRS1), which was suggested by IR studies of this region.

5 pages, 3 figures, accepted for publication in Research in Astronomy and Astrophysics

References in corpus (2)

• Detection of a new methanol maser line with ALMA
• Hubble Space Telescope NICMOS Polarization Observations of Three Edge-on Massive YSOs

Cited by in corpus (4)

• ALMA View of the Infalling Envelope around a Massive Protostar in S255IR SMA1
• Kinematics and stability of high-mass protostellar disk candidates at sub-arcsecond resolution -- Insights from the IRAM NOEMA large program CORE
• YSO jets in the Galactic Plane from UWISH2: V - Jets and Outflows in M17
• Outer rotation curve of the Galaxy with VERA IV: Astrometry of IRAS 01123+6430 and the possibility of cloud-cloud collision