SMA and ALMA studies of protoplanetary disk formation around low-mass protostars

Shigehisa Takakuwa, Nagayoshi Ohashi, Hsi Wei Yen, Ti Lin Chou, Kazuya Saigo, Masao Saito, Yusuke Aso, Yuri Aikawa, Shin Koyamatsu, Masahiro Machida, Sanemichi Z. Takahashi, Kengo Tomida, Kohji Tomisaka

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)126-129
Number of pages4
JournalProceedings of the International Astronomical Union
Volume11
Issue numberS315
DOIs
Publication statusPublished - Aug 1 2015

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protoplanetary disks
protostars
Indian spacecraft
envelopes
formation mechanism
angular momentum
planetary systems
Infrared Astronomy Satellite
gas
trends
gases
trend

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Takakuwa, S., Ohashi, N., Yen, H. W., Chou, T. L., Saigo, K., Saito, M., ... Tomisaka, K. (2015). SMA and ALMA studies of protoplanetary disk formation around low-mass protostars. Proceedings of the International Astronomical Union, 11(S315), 126-129. https://doi.org/10.1017/S1743921316007389

SMA and ALMA studies of protoplanetary disk formation around low-mass protostars. / Takakuwa, Shigehisa; Ohashi, Nagayoshi; Yen, Hsi Wei; Chou, Ti Lin; Saigo, Kazuya; Saito, Masao; Aso, Yusuke; Aikawa, Yuri; Koyamatsu, Shin; Machida, Masahiro; Takahashi, Sanemichi Z.; Tomida, Kengo; Tomisaka, Kohji.

In: Proceedings of the International Astronomical Union, Vol. 11, No. S315, 01.08.2015, p. 126-129.

Research output: Contribution to journalArticle

Takakuwa, S, Ohashi, N, Yen, HW, Chou, TL, Saigo, K, Saito, M, Aso, Y, Aikawa, Y, Koyamatsu, S, Machida, M, Takahashi, SZ, Tomida, K & Tomisaka, K 2015, 'SMA and ALMA studies of protoplanetary disk formation around low-mass protostars', Proceedings of the International Astronomical Union, vol. 11, no. S315, pp. 126-129. https://doi.org/10.1017/S1743921316007389
Takakuwa, Shigehisa ; Ohashi, Nagayoshi ; Yen, Hsi Wei ; Chou, Ti Lin ; Saigo, Kazuya ; Saito, Masao ; Aso, Yusuke ; Aikawa, Yuri ; Koyamatsu, Shin ; Machida, Masahiro ; Takahashi, Sanemichi Z. ; Tomida, Kengo ; Tomisaka, Kohji. / SMA and ALMA studies of protoplanetary disk formation around low-mass protostars. In: Proceedings of the International Astronomical Union. 2015 ; Vol. 11, No. S315. pp. 126-129.
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