Slow ionized wind and rotating disklike system associated with the high-mass young stellar object G345.4938+01.4677

Abstract

We report the detection, made using ALMA, of the 92 GHz continuum and hydrogen recombination lines (HRLs) H40$\alpha$, H42$\alpha$, and H50$\beta$ emission toward the ionized wind associated with the high-mass young stellar object G345.4938+01.4677. This is the luminous central dominating source located in the massive and dense molecular clump associated with IRAS 16562$-$3959. The HRLs exhibit Voigt profiles, a strong signature of Stark broadening. We successfully reproduce the observed continuum and HRLs simultaneously using a simple model of a slow ionized wind in local thermodynamic equilibrium, with no need a high-velocity component. The Lorentzian line wings imply electron densities of $5\times 10^7$ cm${}^{-3}$ on average. In addition, we detect SO and SO${}_2$ emission arising from a compact ($\sim 3000$ AU) molecular core associated with the central young star. The molecular core exhibits a velocity gradient perpendicular to the jet-axis, which we interpret as evidence of rotation. The set of observations toward G345.4938+01.4677 are consistent with it being a young high-mass star associated with a slow photo-ionized wind.

(Accepted by ApJ)

References in corpus (67)

• The Infrared Array Camera (IRAC) for the Spitzer Space Telescope
• Embedded Clusters in Molecular Clouds
• Binary interaction dominates the evolution of massive stars
• GLIMPSE: I. A SIRTF Legacy Project to Map the Inner Galaxy
• Toward Understanding Massive Star Formation
• A new calibration of stellar parameters of Galactic O stars
• Interpreting Spectral Energy Distributions from Young Stellar Objects. II. Fitting observed SEDs using a large grid of pre-computed models
• On the Submillimeter Opacity of Protoplanetary Disks
• Massive molecular outflows
• Evolution of Massive Protostars with High Accretion Rates
• A study of high velocity molecular outflows with an up-to-date sample
• The Red MSX Source Survey: the Massive Young Stellar Population of our Galaxy
• Three-dimensional simulation of massive star formation in the disk accretion scenario
• Chemistry in Infrared Dark Cloud Clumps: a Molecular Line Survey at 3 mm
• A disk of dust and molecular gas around a high-mass protostar
• The formation of massive stars: accretion, disks and the development of hypercompact HII regions
• A hot compact dust disk around a massive young stellar object
• Sulphur chemistry in the envelopes of massive young stars
• Observations on the Formation of Massive Stars by Accretion
• A candidate circumbinary Keplerian disk in G35.20-0.74 N: A study with ALMA
• Infall of gas as the formation mechanism of stars up to 20 times more massive than the Sun
• Spatial distribution of Galactic HII regions
• From the Convergence of Filaments to Disk-Outflow Accretion: Massive-Star Formation in W33A
• The Early Evolution of Massive Stars: Radio Recombination Line Spectra
• Rotating toroids in G10.62-0.38, G19.61-0.23, and G29.96-0.02
• Indications of Inflow Motions in Regions Forming Massive Stars
• Multiple Jets from the High-Mass (Proto)stellar Cluster AFGL5142
• Interferometric multi-wavelength (sub)millimeter continuum study of the young high-mass protocluster IRAS05358+3543
• A wide-angle outflow with the simultaneous presence of a high-velocity jet in the high-mass Cepheus A HW2 system
• A detailed study of G35.2-0.7N: collimated outflows in a cluster of high-mass young stellar objects
• High Angular Resolution Observations of the Collimated Jet Source Associated with a Massive Protostar in IRAS 16547-4247
• A ring/disk/outflow system associated with W51 North: a very massive star in the making
• S-bearing molecules in Massive Dense Cores
• Subarcsecond Imaging of the NGC 6334 I(N) Protocluster: Two Dozen Compact Sources and a Massive Disk Candidate
• Sulfur chemistry: 1D modeling in massive dense cores
• Radio recombination lines from the largest bound atoms in space
• A String of Radio Emission Associated with IRAS 16562-3959: A Collimated Jet Emanating from a Luminous Massive YSO
• The Collimated Jet Source in IRAS 16547-4247: Time Variation, Possible Precession, and Upper Limits to the Proper Motions Along the Jet Axis
• The Ionization of Accretion Flows in High Mass Star Formation: W51e2
• Jet formation from massive young stars: Magnetohydrodynamics versus radiation pressure
• Search for ionized jets towards high-mass young stellar objects
• Fragmentation, infall, and outflow around the showcase massive protostar NGC7538 IRS1 at 500 AU resolution
• Chemical segregation toward massive hot cores: The AFGL2591 star forming region
• Low Velocity Ionized Winds from Regions Around Young O Stars
• Resolving the Circumstellar Disk Around the Massive Protostar Driving the HH 80-81 Jet
• The standard model of low-mass star formation applied to massive stars: a multi-wavelength picture of AFGL 2591
• Hydrogen Masers. I: Theory and Prospects
• NGC7538 IRS1 - an ionized jet powered by accretion
• The mass-velocity and intensity-velocity relations in jet-driven molecular outflows
• Massive Star Formation
• Extremely broad radio recombination maser lines toward the high-velocity ionized jet in Cepheus A HW2
• Forming an O Star via Disk Accretion?
• Understanding hydrogen recombination line observations with ALMA and EVLA
• Two massive star-forming regions at early evolutionary stages
• The Rotating Molecular Structures and the Ionized Outflow Associated with IRAS 16547-4247
• A non-LTE radiative transfer model to study ionized outflows and disks. The case of MWC349A
• A bright radio HH object with large proper motions in the massive star-forming region W75N
• A VLA Study of Ultracompact and Hypercompact H II Regions from 0.7 to 3.6 cm
• Radiative transfer and molecular data for astrochemistry (Review)
• Massive star formation in the GMC G345.5+1.0: Spatial distribution of the dust emission
• A rotating molecular disk toward IRAS 18162-2048, the exciting source of HH 80-81
• A hot molecular outflow driven by the ionized jet associated with IRAS 16562-3959
• Tracers of Discs and Winds around Intermediate and High Mass Young Stellar Objects
• A High Mass Dusty Disk Candidate: The Case of IRAS 18151-1208
• ALMA and VLA observations of recombination lines and continuum toward the Becklin-Neugebauer object in Orion
• Detection of Voigt Spectral Line Profiles of Hydrogen Radio Recombination Lines toward Sagittarius B2(N)
• On The Apparent Narrowing of Radio Recombination Lines at High Principal Quantum Numbers

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• SMA Observations of the Hot Molecular Core IRAS 18566+0408
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• The SOMA Radio Survey. I. Comprehensive SEDs Of High-Mass Protostars From Infrared To Radio And The Emergence Of Ionization Feedback
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• An ALMA view of the Galactic super star cluster RCW38 at 270-AU resolution
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• ngVLA Synthetic Observations of Ionized Gas in Massive Protostars
• Fire from Ice - Massive Star Birth from Infrared Dark Clouds