Substructures in the Keplerian disc around the O-type (proto)star G17.64+0.16

Abstract

We present the highest angular resolution (20x15mas - 44x33au) Atacama Large Millimeter/sub-millimeter Array (ALMA) observations currently possible of the proto-O-star G17.64+0.16 in Band 6. The Cycle 5 observations with baselines out to 16km probes scales <50au and reveal the rotating disc around G17.64+0.16, a massive forming O-type star. The disc has a ring-like enhancement in the dust emission, especially visible as arc structures to the north and south. The Keplerian kinematics are most prominently seen in the vibrationally excited water line, H2O (Eu=3461.9K). The mass of the central source found by modelling the Keplerian rotation is consistent with 45+/-10Mo. The H30alpha (231.9GHz) radio-recombination line and the SiO (5-4) molecular line were detected at up to the 10 sigma$ level. The estimated disc mass is 0.6-2.6Mo under the optically thin assumption. Analysis of the Toomre Q parameter, in the optically thin regime, indicates that the disc stability is highly dependent on temperature. The disc currently appears stable for temperatures >150K, this does not preclude that the substructures formed earlier through disc fragmentation.

arXiv comment9 Total, inc references, appendix, long author list, 4 figures (inc appendix)

References in corpus (55)

• Binary interaction dominates the evolution of massive stars
• First Results from High Angular Resolution ALMA Observations Toward the HL Tau Region
• The Disk Substructures at High Angular Resolution Project (DSHARP): I. Motivation, Sample, Calibration, and Overview
• ATLASGAL - The APEX Telescope Large Area Survey of the Galaxy at 870 microns
• The Formation of Massive Star Systems by Accretion
• Ringed Substructure and a Gap at 1 AU in the Nearest Protoplanetary Disk
• 2-D Radiative Transfer in Protostellar Envelopes: I. Effects of Geometry on Class I Sources
• Evolution of Massive Protostars with High Accretion Rates
• Evidence of fast pebble growth near condensation fronts in the HL Tau protoplanetary disk
• Structure and Evolution of the Envelopes of Deeply Embedded Massive Young Stars
• The Red MSX Source Survey: the Massive Young Stellar Population of our Galaxy
• LIME - a flexible, non-LTE line excitation and radiation transfer method for millimeter and far-infrared wavelengths
• Three-dimensional simulation of massive star formation in the disk accretion scenario
• Shadows and spirals in the protoplanetary disk HD 100453
• Circumbinary, not transitional: On the spiral arms, cavity, shadows, fast radial flows, streamers and horseshoe in the HD142527 disc
• The Tarantula Massive Binary Monitoring: I. Observational campaign and OB-type spectroscopic binaries
• A Keplerian-like disk around the forming O-type star AFGL 4176
• Understanding Spatial and Spectral Morphologies of Ultracompact H II Regions
• An Unstable Truth: How Massive Stars get their Mass
• First hydrodynamics simulations of radiation forces and photoionization feedback in massive star formation
• ALMA Observations of Infalling Flows toward the Keplerian Disk around the Class I Protostar L1489 IRS
• G11.92-0.61 MM1: A Keplerian disc around a massive young proto-O star
• Homogeneous Analysis of the Dust Morphology of Transition Disks Observed with ALMA: Investigating dust trapping and the origin of the cavities
• Multiple rings in the transition disk and companion candidates around RXJ1615.3-3255. High contrast imaging with VLT/SPHERE
• The Moving Group Targets of the SEEDS High-Contrast Imaging Survey of Exoplanets and Disks: Results and Observations from the First Three Years
• G11.92-0.61 MM 1: A fragmented Keplerian disk surrounding a proto-O star
• Forming spectroscopic massive proto-binaries by disk fragmentation
• Simulating the Formation of Massive Protostars: I. Radiative Feedback and Accretion Disks
• ALMA resolves the spiraling accretion flow in the luminous OB cluster forming region G33.92+0.11
• On the origin of the spiral morphology in the Elias 2-27 circumstellar disc
• Gaps, rings, and non-axisymmetric structures in protoplanetary disks - Emission from large grains
• VLA observations of ammonia in high-mass star formation regions
• Dust trapping by spiral arms in gravitationally unstable protostellar discs
• A Keplerian disk around Orion Source I, a ~15 Msun YSO
• Multiple spiral arms in the disk around intermediate-mass binary HD 34700A
• Resolved 24.5 micron emission from massive young stellar objects
• CO emission tracing a warp or radial flow within $\lesssim$ 100 au in the HD 100546 protoplanetary disk
• The VLTI/MIDI survey of massive young stellar objects - Sounding the inner regions around intermediate- and high-mass young stars using mid-infrared interferometry
• Radiative transfer modelling of W33A MM1: 3-D structure and dynamics of a complex massive star forming region
• Core fragmentation and Toomre stability analysis of W3(H2O): A case study of the IRAM NOEMA large program CORE
• The ALMA view of W33A: A Spiral Filament Feeding the Candidate Disc in MM1-Main
• Radiation-hydrodynamical simulations of massive star formation using Monte Carlo radiative transfer II. The formation of a 25 solar-mass star
• Fragmentation and disk formation in high-mass star formation: The ALMA view of G351.77-0.54 at 0.06" resolution
• A multiple system of high-mass YSOs surrounded by disks in NGC7538 IRS1
• Hot Molecular Circumstellar Disk around Massive Protostar Orion Source I
• An Asymmetric Keplerian Disk Surrounding the O-type Protostar IRAS16547$-$4247
• Very compact radio emission from high-mass protostars. I. CRL 2136: Continuum and water maser observations
• Revealing signatures of planets migrating in protoplanetary discs with ALMA multi-wavelength observations
• High-mass star formation at sub-50AU scales
• A pilot survey of the binarity of Massive Young Stellar Objects with $K$ band adaptive optics
• Near-infrared integral field spectroscopy of Massive Young Stellar Objects
• Observing substructure in circumstellar discs around massive young stellar objects
• A 10-$M_{\odot }$ YSO with a Keplerian disk and a nonthermal radio jet
• A multi-scale exploration of a massive young stellar object - a transition disk around G305.20+0.21?
• Direct detection of precursors of gas giants formed by gravitational instability with the Atacama Large Millimetre/sub-millimetre Array

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• Spiral arms in the proto-planetary disc HD100453 detected with ALMA: evidence for binary-disc interaction and a vertical temperature gradient
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