RESOLVING THE DUST DISK IN THE PROTOTYPE IONIZED DISK WIND SOURCE S140-IRS1

Journal Article · Fri Dec 20 04:00:00 EST 2013 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/779/2/L24· OSTI ID:22364084

Maud, L. T.

The dust disk confirming the presence of an ionized disk wind in the massive young stellar object, S140-IRS1, is resolved for the first time. The 1.3 mm continuum observations taken with the CARMA A array configuration achieve a resolution of ∼0.''12, probing scales of 100 au. The dust disk is elongated in a direction aligned with a previously discovered ionized disk wind. Both are perpendicular to the large scale molecular outflow and near-infrared reflection nebula. A two-dimensional axis-symmetric radiative transfer model is used to produce synthetic images and visibilities for comparison with the observations. Using a 2D visibility fitting method the position angle of the dusty disk is constrained to 40° ± 5°. This result confirms the disk wind nature of the radio emission from S140-IRS1 and shows that radiation pressure on the gas in the disk is important in the later stages of the massive star formation evolutionary sequence.

• OSTI ID: 22364084
• Journal Information: Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 2 Vol. 779; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ASTRONOMY
ASTROPHYSICS
COMPARATIVE EVALUATIONS
COSMIC DUST
IMAGES
NEBULAE
PROBES
RADIANT HEAT TRANSFER
RADIATION PRESSURE
REFLECTION
RESOLUTION
STARS
STELLAR WINDS
SYMMETRY
TWO-DIMENSIONAL CALCULATIONS
VISIBILITY