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A 0.2 solar mass protostar with a Keplerian disk in the very young L1527 IRS system
John J. Tobin, Lee Hartmann, Hsin-Fang Chiang +5
In their earliest stages, protostars accrete mass from their surrounding envelopes through circumstellar disks. Until now, the smallest observed protostar/envelope mass ratio was ~…
The Envelope and Embedded Disk around the Class 0 Protostar L1157-mm: Dual-wavelength Interferometric Observations and Modeling
Hsin-Fang Chiang, Leslie W. Looney, John J. Tobin
We present dual-wavelength observations and modeling of the nearly edge-on Class 0 young stellar object L1157-mm. Using the Combined Array for Research in Millimeter-wave Astronomy…
Confirming the Primarily Smooth Structure of the Vega Debris Disk at Millimeter Wavelengths
A. M. Hughes, D. J. Wilner, B. Mason +11
Clumpy structure in the debris disk around Vega has been previously reported at millimeter wavelengths and attributed to concentrations of dust grains trapped in resonances with an…
Complex Structure in Class 0 Protostellar Envelopes III: Velocity Gradients in Non-Axisymmetric Envelopes, Infall or Rotation?
John J. Tobin, Lee Hartmann, Edwin A. Bergin +5
We present an interferometric kinematic study of morphologically complex protostellar envelopes based on observations of the dense gas tracers N2H+ and NH3. The strong asymmetric n…