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SMA and ALMA Studies of Disk- and Planet Formation around Low-mass Protostars
Shigehisa Takakuwa, Hsi-Wei Yen, Ti-Lin Chou +16
We report our current SMA and ALMA studies of disk and planet formation around protostars. We have revealed that 100 AU scale disks in Keplerian rotation are ubiquitous…
ALMA Observations of SMM11 Reveal an Extremely Young Protostar in Serpens Main Cluster
Yusuke Aso, Nagayoshi Ohashi, Yuri Aikawa +8
We report the discovery of an extremely young protostar, SMM11, located in the associated submillimeter condensation SMM11 in the Serpens Main cluster using the Atacama Large Milli…
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…
1000 AU Exterior Arcs Connected to the Protoplanetary Disk around HL Tau
Hsi-Wei Yen, Shigehisa Takakuwa, You-Hua Chu +13
The protoplanetary disk around HL Tau is so far the youngest candidate of planet formation, and it is still embedded in a protostellar envelope with a size of thousands of au. In t…
ALMA Observations of the Protostar L1527 IRS: Probing Details of the Disk and the Envelope Structures
Yusuke Aso, Nagayoshi Ohashi, Yuri Aikawa +7
We have newly observed the Class 0/I protostar L1527 IRS using the Atacama Large Millimeter/submillimeter Array (ALMA) during its Cycle 1 in 220 GHz dust continuum and C18O (J=2-1)…
Spiral Arms, Infall, and Misalignment of the Circumbinary Disk from the Circumstellar Disks in the Protostellar Binary System L1551 NE
Shigehisa Takakuwa, Kazuya Saigo, Tomoaki Matsumoto +5
We report the ALMA Cycle 2 observations of the Class I binary protostellar system L1551 NE in the 0.9-mm continuum, C18O (3-2), 13CO (3-2), SO (7_8-6_7), and the CS (7-6) emission.…