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12 papers · 2 filters
The ALMA early science view of FUor/EXor objects - V: continuum disc masses and sizes
Lucas A. Cieza, Dary Ruiz-Rodriguez, Sebastian Perez +9
Low-mass stars build a significant fraction of their total mass during short outbursts of enhanced accretion known as FUor and EXor outbursts. FUor objects are characterized by a s…
Measurement of Circumstellar Disk Sizes in the Upper Scorpius OB Association with ALMA
Scott A. Barenfeld, John M. Carpenter, Anneila I. Sargent +2
We present detailed modeling of the spatial distributions of gas and dust in 57 circumstellar disks in the Upper Scorpius OB Association observed with ALMA at sub-millimeter wavele…
Direct mapping of the temperature and velocity gradients in discs. Imaging the vertical CO snow line around IM Lupi
C. Pinte, F. Menard, G. Duchene +14
Accurate measurements of the physical structure of protoplanetary discs are critical inputs for planet formation models. These constraints are traditionally established via complex…
ALMA Reveals Transition of Polarization Pattern with Wavelength in HL Tau's Disk
Ian W. Stephens, Haifeng Yang, Zhi-Yun Li +10
The mechanism for producing polarized emission from protostellar disks at (sub)millimeter wavelengths is currently uncertain. Classically, polarization is expected from non-spheric…
How do stars gain their mass? A JCMT/SCUBA-2 Transient Survey of Protostars in Nearby Star Forming Regions
Gregory J. Herczeg, Doug Johnstone, Steve Mairs +55
Most protostars have luminosities that are fainter than expected from steady accretion over the protostellar lifetime. The solution to this problem may lie in episodic mass accreti…
The ALMA Early Science View of FUor/EXor objects. IV. Misaligned Outflows in the Complex Star-forming Environment of V1647 Ori and McNeil's Nebula
David A. Principe, Lucas Cieza, Antonio Hales +9
We present Atacama Large Millimeter/sub-millimeter Array (ALMA) observations of the star-forming environment surrounding V1647 Ori, an outbursting FUor/EXor pre-MS star. Dust conti…