Near-IR speckle imaging of massive young stellar objects

Abstract

We present near-IR speckle images of 21 massive Young Stellar Objects (YSOs) associated with outflows. The aim of this study is to search for sub-arcsecond reflection nebulae associated with the outflow cavity. We find that 6 of the massive YSOs show a conical nebula which can be interpreted in terms of reflected light from the dusty walls of the outflow cavity. In all cases, the small scale structures seen in our images are compared with outflow indicators found in the literature. No clear correlation is found between the presence of the reflection nebulosity and any property such as degree of embeddedness. We also note that 3 of the sources show close companions, one of them belonging also to the sample with conical nebula.

17 pages, 16 figures, accepted for publication in A&A

References in corpus (13)

• 2-D Radiative Transfer in Protostellar Envelopes: I. Effects of Geometry on Class I Sources
• HST/STIS Spectroscopy of the Optical Outflow from DG Tau: Indications for Rotation in the Initial Jet Channel
• Radiation driven winds from luminous accretion disks
• Collapse of Rotating Magnetized Molecular Cloud Cores and Mass Outflows
• The Population of the Galactic Plane as Seen by MSX
• Hydrodynamical Simulations of Jet- and Wind-driven Protostellar Outflows
• A dusty torus around the luminous young star LkHa 101
• Multiple outflows in IRAS 19410+2336
• A Mid-Infrared Study of the Young Stellar Population in the NGC 2024 Cluster
• Imaging the disk around the luminous young star LkHalpha 101 with infrared interferometry
• Visual binaries among high-mass stars - An adaptive optics survey of OB stars in the NGC 6611 cluster
• Outflow collimation in young stellar objects
• Constraints in the circumstellar density distribution of massive Young Stellar Objects

Cited by in corpus (26)

• A sub-millimeter Mapping Survey of Herbig AeBe Stars
• Resolved 24.5 micron emission from massive young stellar objects
• The VLTI/MIDI survey of massive young stellar objects - Sounding the inner regions around intermediate- and high-mass young stars using mid-infrared interferometry
• Outflows from the high-mass protostars NGC 7538 IRS1/2 observed with bispectrum speckle interferometry -- Signatures of flow precession
• An Extensive, Sensitive Search for SiO Masers in High- and Intermediate-Mass Star-Forming Regions
• Radiation-hydrodynamical simulations of massive star formation using Monte Carlo radiative transfer II. The formation of a 25 solar-mass star
• A high-frequency radio continuum study of massive young stellar objects
• An equatorial wind from the massive young stellar object S140 IRS 1
• Synthetic observations of star formation and the interstellar medium
• Young stars and brown dwarfs surrounding Alnilam (eps Ori) and Mintaka (del Ori)
• Massive Star Formation
• A rotating disk around the very young massive star AFGL 490
• A large-scale CO survey of the Rosette Molecular Cloud: assessing the effects of O stars on surrounding molecular gas
• A Galactic survey of radio jets from massive protostars
• A new radio recombination line maser object toward the MonR2 HII region
• New signposts of massive star formation in the S235A-B region
• The interactions of winds from massive young stellar objects: X-ray emission, dynamics, and cavity evolution
• Hubble Space Telescope NICMOS Polarization Observations of Three Edge-on Massive YSOs
• The ionized warped disk and disk wind of the massive protostar Monoceros R2-IRS2 seen with ALMA
• Unveiling the traits of massive young stellar objects through a multi-scale survey
• Submillimeter Array High-angular Resolution Observations of the Monoceros R2 Star Forming Cluster
• Near-infrared line spectropolarimetry of hot massive stars
• Dark cloud-type chemistry in PDRs with moderate UV field
• Aligned grains and inferred toroidal magnetic fields in the envelopes of massive young stellar objects
• The Rosette Eye: the key transition phase in the birth of a massive star
• Dense gas and exciting sources of the molecular outflow in the AFGL 437 star-forming region