First Science Results From SOFIA/FORCAST: Super-Resolution Imaging of the S140 Cluster at 37\micron

Abstract

We present 37\micron\ imaging of the S140 complex of infrared sources centered on IRS1 made with the FORCAST camera on SOFIA. These observations are the longest wavelength imaging to resolve clearly the three main sources seen at shorter wavelengths, IRS 1, 2 and 3, and are nearly at the diffraction limit of the 2.5-m telescope. We also obtained a small number of images at 11 and 31\micron\ that are useful for flux measurement. Our images cover the area of several strong sub-mm sources seen in the area -- SMM 1, 2, and 3 -- that are not coincident with any mid-infrared sources and are not visible in our longer wavelength imaging either. Our new observations confirm previous estimates of the relative dust optical depth and source luminosity for the components in this likely cluster of early B stars. We also investigate the use of super-resolution to go beyond the basic diffraction limit in imaging on SOFIA and find that the van Cittert algorithm, together with the "multi-resolution" technique, provides excellent results.

References in corpus (5)

• First Science Observations with SOFIA/FORCAST: The FORCAST Mid-infrared Camera
• Resolved 24.5 micron emission from massive young stellar objects
• An equatorial wind from the massive young stellar object S140 IRS 1
• A red supergiant nebula at 25 micron: arcsecond scale mass-loss asymmetries of mu Cep
• First Science Observations with SOFIA/FORCAST: 6 TO 37 micron Imaging of Orion BN/KL

Cited by in corpus (5)

• WISH VI. Constraints on UV and X-ray irradiation from a survey of hydrides in low- to high-mass YSOs
• The fine structure line deficit in S 140
• Temperatures of dust and gas in S~140
• Aligned grains and inferred toroidal magnetic fields in the envelopes of massive young stellar objects
• The spatial correlation between CN line and dust continuum emitting regions in high-mass star-forming cloud