TY - JOUR
T1 - SMA and ALMA studies of protoplanetary disk formation around low-mass protostars
AU - Takakuwa, Shigehisa
AU - Ohashi, Nagayoshi
AU - Yen, Hsi Wei
AU - Chou, Ti Lin
AU - Saigo, Kazuya
AU - Saito, Masao
AU - Aso, Yusuke
AU - Aikawa, Yuri
AU - Koyamatsu, Shin
AU - Machida, Masahiro N.
AU - Takahashi, Sanemichi Z.
AU - Tomida, Kengo
AU - Tomisaka, Kohji
N1 - Publisher Copyright:
© International Astronomical Union 2016.
PY - 2015/8/1
Y1 - 2015/8/1
N2 - We report our systematic survey observations of protostellar sources with the SubMillimeter Array (SMA) and Atacama Large Millimeter/submillimeter Array (ALMA). The purpose of our survey is to investigate formation mechanism of protoplanetary disks, precursors of planetary systems, out of ∼1000 AU-scale protostellar envelopes surrounding the protostars. We found that in the early protostars (B335, NGC1333 IRAS 4B), the envelopes do not show significant rotating motions but infalling motions toward the central protostars. In more evolved protostars (L1527 IRS, L1448-mm, L1551 IRS 5), the envelopes are infalling and rotating with the conserved specific angular momenta (that is, v rot br -1). In most evolved sources (L1551 NE, TMC-1A, L1489 IRS) large-scale (b3100 AU) disks in Keplerian rotation or protoplanetary disks are evident. These results demonstrate a systematic evolutionary trend of envelope gas motions toward the disk formation.
AB - We report our systematic survey observations of protostellar sources with the SubMillimeter Array (SMA) and Atacama Large Millimeter/submillimeter Array (ALMA). The purpose of our survey is to investigate formation mechanism of protoplanetary disks, precursors of planetary systems, out of ∼1000 AU-scale protostellar envelopes surrounding the protostars. We found that in the early protostars (B335, NGC1333 IRAS 4B), the envelopes do not show significant rotating motions but infalling motions toward the central protostars. In more evolved protostars (L1527 IRS, L1448-mm, L1551 IRS 5), the envelopes are infalling and rotating with the conserved specific angular momenta (that is, v rot br -1). In most evolved sources (L1551 NE, TMC-1A, L1489 IRS) large-scale (b3100 AU) disks in Keplerian rotation or protoplanetary disks are evident. These results demonstrate a systematic evolutionary trend of envelope gas motions toward the disk formation.
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U2 - 10.1017/S1743921316007389
DO - 10.1017/S1743921316007389
M3 - Article
AN - SCOPUS:85054293132
SN - 1743-9213
VL - 11
SP - 126
EP - 129
JO - Proceedings of the International Astronomical Union
JF - Proceedings of the International Astronomical Union
IS - S315
ER -