Výsledky vyhledávání - "Shin Koyamatsu"

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

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

Publikováno v: Proceedings of the International Astronomical Union. 11:126-129

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,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0291d3e555e84f9d258351de44d11f62
https://doi.org/10.1017/s1743921316007389

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ALMA Observations of the Transition from Infall Motion to Keplerian Rotation around the Late-phase Protostar TMC-1A

Autor: Shigehisa Takakuwa, Kengo Tomida, Masao Saito, Hsi-Wei Yen, Yusuke Aso, Kohji Tomisaka, Kazuya Saigo, Yuri Aikawa, Nagayoshi Ohashi, Masahiko Hayashi, Masahiro N. Machida, Shin Koyamatsu

We have observed the Class I protostar TMC-1A with Atacama Millimeter/submillimeter Array (ALMA) in 12CO and C18O (J=2-1), and 1.3-mm dust continuum emission. Continuum emission with a deconvolved size of 0.50"x0.37", perpendicular to the 12CO outflo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c7db348ed1bc9784af2c504c2b9e16b4
http://arxiv.org/abs/1508.07013

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The Sizes and Depletions of the Dust and Gas Cavities in the Transitional Disk J160421.7-213028

Publikováno v: The Astrophysical Journal. 836:201

We report ALMA Cycle 2 observations of 230 GHz (1.3 mm) dust continuum emission, and $^{12}$CO, $^{13}$CO, and C$^{18}$O J = 2-1 line emission, from the Upper Scorpius transitional disk [PZ99] J160421.7-213028, with an angular resolution of ~0".25 (3

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::053b9fbae2108b0b7d67e5710c0b8290
https://doi.org/10.3847/1538-4357/aa5abf

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The Disappearing Envelope around the Transitional Class I Object L43

Autor: Shigehisa Takakuwa, Satoshi Mayama, Nagayoshi Ohashi, Masahiko Hayashi, Shin Koyamatsu

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) toward L43, a protostellar object in transition from Class I to II. Th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a0a874bd6d9772867de6a7d344bd293
http://arxiv.org/abs/1405.5898

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NO KEPLERIAN DISK >10 AU AROUND THE PROTOSTAR B335: MAGNETIC BRAKING OR YOUNG AGE?

Autor: Hsi-Wei Yen, Shin Koyamatsu, Shigehisa Takakuwa, Patrick M. Koch, Yusuke Aso, Nagayoshi Ohashi, Ruben Krasnopolsky

Publikováno v: The Astrophysical Journal. 812:129

We have conducted ALMA cycle 2 observations in the 1.3 mm continuum and in the C18O (2-1) and SO (5_6-4_5) lines at a resolution of ~0.3" toward the Class 0 protostar B335. The 1.3 mm continuum, C18O, and SO emission all show central compact componen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::791b0050f8b1bba5a6d091fde3f42afe
https://doi.org/10.1088/0004-637x/812/2/129

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FORMATION OF A KEPLERIAN DISK IN THE INFALLING ENVELOPE AROUND L1527 IRS: TRANSFORMATION FROM INFALLING MOTIONS TO KEPLER MOTIONS

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

Publikováno v: The Astrophysical Journal. 796:131

We report Atacama Large Millimeter/submillimeter Array (ALMA) cycle 0 observations of the C{sup 18}O (J = 2-1), SO (J{sub N} = 6{sub 5}-5{sub 4}), and the 1.3 mm dust continuum toward L1527 IRS, a class 0 solar-type protostar surrounded by an infalli

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::765f361790f50f4bbb7a5166d9dc14f0
https://doi.org/10.1088/0004-637x/796/2/131

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ALMA OBSERVATIONS OF INFALLING FLOWS TOWARD THE KEPLERIAN DISK AROUND THE CLASS I PROTOSTAR L1489 IRS

Autor: Hsi-Wei Yen, Masao Saito, Nagayoshi Ohashi, Shigehisa Takakuwa, Kengo Tomida, Kazuya Saigo, Kohji Tomisaka, Masahiro N. Machida, Yuri Aikawa, Yusuke Aso, Shin Koyamatsu

Publikováno v: The Astrophysical Journal. 793:1

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 and an infalling envelope. The Keplerian disk is clearly identified in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8dfae5cfd2064063a4d215c8619d971
https://doi.org/10.1088/0004-637x/793/1/1

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