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Observations of Infalling and Rotational Motions on a 1,000-AU Scale around 17 Class 0 and 0/I Protostars: Hints of Disk Growth and Magnetic Braking?
Hsi-Wei Yen, Patrick M. Koch, Shigehisa Takakuwa +3
We perform imaging and analyses of SMA 1.3 mm continuum, C18O (2-1) and 12CO (2-1) line data of 17 Class 0 and 0/I protostars to study their gas kinematics on a 1,000-AU scale. Con…
The Structure of Pre-transitional Protoplanetary Disks. II. Azimuthal Asymmetries, Different Radial Distributions of Large and Small Dust Grains in PDS~70
J. Hashimoto, T. Tsukagoshi, J. M. Brown +54
The formation scenario of a gapped disk, i.e., transitional disk, and its asymmetry is still under debate. Proposed scenarios such as disk-planet interaction, photoevaporation, gra…
Transition from the Infalling Envelope to the Keplerian Disk around L1551 IRS 5
Ti-Lin Chou, Shigehisa Takakuwa, Hsi-Wei Yen +2
We present combined SubMillimeter Array (SMA) + Atacama Submillimeter Telescope Experiment (ASTE) images of the Class I protobinary L1551 IRS 5 in the CS ( = 7--6) line, the sub…
Formation of a Keplerian disk in the infalling envelope around L1527 IRS: transformation from infalling motions to Kepler motions
Nagayoshi Ohashi, Kazuya Saigo, Yusuke Aso +9
We report Atacama Large Millimeter/submillimeter Array (ALMA) cycle 0 observations of CO (), SO () and 1.3mm dust continuum toward L1527 IRS, a class 0…
ALMA Observations of Infalling Flows toward the Keplerian Disk around the Class I Protostar L1489 IRS
Hsi-Wei Yen, Shigehisa Takakuwa, Nagayoshi Ohashi +8
We have conducted ALMA observations in the 1.3 mm continuum and 12CO (2-1), C18O (2-1) and SO (5_6-4_5) lines toward L1489 IRS, a Class I protostar surrounded by a Keplerian disk a…
The Disappearing Envelope around the Transitional Class I Object L43
Shin Koyamatsu, Shigehisa Takakuwa, Masahiko Hayashi +2
We present SMA interferometric observations of the 12CO J=2-1, 13CO (J=2-1), and C18O (J=2-1) lines and 225 GHz continuum emission and SMT single-dish observations of C18O (J=2-1)…