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Disk-Driven Rotating Bipolar Outflow in Orion Source I
Tomoya Hirota, Masahiro N. Machida, Yuko Matsushita +5
One of the outstanding problems in star-formation theory concerns the transfer of angular momentum such that mass can accrete onto a newly born young stellar object (YSO). From a t…
The Difference in Abundances between N-bearing and O-bearing Species in High-Mass Star-Forming Regions
Taiki Suzuki, Masatoshi Ohishi, Masao Saito +3
The different spatial distributions of N-bearing and O-bearing species, as is well known towards Orion~KL, is one of the long-lasting mysteries. We conducted a survey observation a…
ALMA observations of submillimeter H2O and SiO lines in Orion Source I
Tomoya Hirota, Masahiro N. Machida, Yuko Matsushita +5
We present observational results of the submillimeter H2O and SiO lines toward a candidate high-mass young stellar object Orion Source I using ALMA. The spatial structures of the h…
L483: Warm Carbon-Chain Chemistry Source Harboring Hot Corino Activity
Yoko Oya, Nami Sakai, Yoshimasa Watanabe +11
The Class 0 protostar, L483, has been observed in various molecular lines in the 1.2 mm band at a sub-arcsecond resolution with ALMA. An infalling-rotating envelope is traced by th…
Trigonometric distance and proper motions of H2O maser bowshocks in AFGL 5142
Ross A. Burns, Toshihiro Handa, Hiroshi Imai +6
We present the results of multi-epoch VLBI observations of water masers in the AGFL 5142 massive star forming region. We measure an annual parallax of mas, corr…