2024年

• Internal 1000 AU-scale Structures of the R CrA Cluster-forming Cloud -- I: Filamentary Structures

Kengo Tachihara, Naofumi Fukaya, Kazuki Tokuda, Yasumasa Yamasaki, Takeru Nishioka, Daisei Abe, Tsuyoshi Inoue, Naoto Harada, Ayumu Shoshi, Shingo Nozaki, Asako Sato, Mitsuki Omura, Kakeru Fujishiro, Misato Fukagawa, Masahiro N. Machida, Takahiro Kanai, Yumiko Oasa, Toshikazu Onishi, Kazuya Saigo, Yasuo Fukui

Astrophysical Journal, Volume 968, Number 2, 131, 2024 June 20

• Observations of spiral and streamer on a candidate proto-brown dwarf

B. Riaz, D. Stamatellos, M. N. Machida

Monthly Notices of the Royal Astronomical Society, Volume 529, Issue 4, April 2024, Pages 3601-3609

• Discovery of Asymmetric Spike-like Structures of 10 au Disk around the Very Low-luminosity Protostar Embedded in the Taurus Dense Core MC 27/L1521F with ALMA

Kazuki Tokuda, Naoto Harada, Mitsuki Omura, Tomoaki Matsumoto, Toshikazu Onishi, Kazuya Saigo, Ayumu Shoshi, Shingo Nozaki, Kengo Tachihara, Naofumi Fukaya, Yasuo Fukui, Shu-ichiro Inutsuka, and Masahiro N. Machida

Astrophysical Journal, Volume 965, Number 2, 99, 2024 April 11

• An Extremely Young Protostellar Core, MMS 1/OMC-3: Episodic Mass Ejection History Traced by the Micro SiO Jet

Satoko Takahashi, Masahiro Machida, Mitsuki Omura, Doug Johnstone, Kazuya Saigo, Naoto Harada, Kohji Tomisaka, Paul T. P. Ho, Luis A. Zapata, Steve Mairs, Gregory J. Herczeg, Kotomi Taniguchi, Yuhua Liu, and Asako Sato

Astrophysical Journal, Volume 964, Number 1, 48, 2024 March 4

• Dust Polarization of Prestellar and Protostellar Sources in OMC-3

Yuhua Liu, Satoko Takahashi, Masahiro Machida, Kohji Tomisaka, Josep Miquel Girart, Paul T. P. Ho, Kouichiro Nakanishi, and Asako Sato

Astrophysical Journal, Volume 963, Number 2, 104, 2024 March 4

• Revealing Multiple Nested Molecular Outflows with Rotating Signatures in HH270mms1-A with ALMA

Mitsuki Omura, Kazuki Tokuda, and Masahiro Machida

Astrophysical Journal, Volume 963, Number 1, 72, 2024 February 29

• Ring Gap Structure around Class I Protostar WL 17

Ayumu Shoshi, Naoto Harada, Kazuki Tokuda, Yoshihiro Kawasaki, Hayao Yamasaki, Asako Sato, Mitsuki Omura, Masayuki Yamaguchi, Kengo Tachihara, and Masahiro N. Machida

Astrophysical Journal, Volume 961, Number 2, 228, 2024 January 30

2023年

• Secondary outflow driven by the protostar Ser-emb 15 in Serpens

Asako Sato, Kazuki Tokuda, Masahiro N. Machida, Kengo Tachihara, Naoto Harada, Hayao Yamasaki, Shingo Hirano, Toshikazu Onishi, and Yuko Matsushita

Astrophysical Journal, Volume 958, Number 2, 102, 2023 November 16

• An ALMA resoved view of 7,000 au Protostellar Gas Ring around the Class I source CrA-IRS 2 as a possible sign of magnetic flux advection

Kazuki Tokuda, Naofumi Fukaya, Kengo Tachihara, Mitsuki Omura, Naoto Harada, Shingo Nozaki, Ayumu Shoshi, and Masahiro N. Machida

The Astrophysical Journal Letters, Volume 956, Number 1, 16, 2023 October 9

• "An ALMA Glimpse of Dense Molecular Filaments Associated with High-mass Protostellar Systems in the Large Magellanic Cloud"

Kazuki Tokuda, Naoto Harada, Kei E. I. Tanaka, Tsuyoshi Inoue, Takashi Shimonishi, Yichen Zhang, Marta Sewiło, Yuri Kunitoshi, Ayu Konishi, Yasuo Fukui, Akiko Kawamura, Toshikazu Onishi, and Masahiro N. Machida

The Astrophysical Journal, Volume 955, Number 1, 52, 2023 September 18

• Oxygen isotope exchange between molten silicate spherules and ambient water vapor with nonzero relative velocity: Implication for chondrule formation environment

Sota Arakawa, Daiki Yamamoto, Takayuki Ushikubo, Hiroaki Kaneko, Hidekazu Tanaka, Shigenobu Hirose, Taishi Nakamoto

Icarus, Volume 405, 15 November 2023, 115690

• Impact of turbulence intensity and fragmentation velocity on dust particle size evolution and non-ideal magnetohydrodynamics effects

Yoshihiro Kawasaki and Masahiro N. Machida

Monthly Notices of the Royal Astronomical Society, Volume 522, Issue 3, July 2023, Pages 3679–3692

• Magnetic Effects Promote Supermassive Star Formation in Metal-enriched Atomic- cooling Halos

Shingo Hirano, Masahiro N. Machida and Shantanu Basu

The Astrophysical Journal, Volume 952, Number 1, 56, 2023 July 18

• Environmental effects of star-forming cores on mass accretion rate

Shingo Nozaki and Masahiro N. Machida

Monthly Notices of the Royal Astronomical Society, Volume 519, Issue 4, March 2023, Pages 5017-5030

• Dust motion and possibility of dust growth in a growing circumstellar disk

Shunta Koga and Masahiro N. Machida

Monthly Notices of the Royal Astronomical Society, Volume 519, Issue 3, March 2023, Pages 3595–3610

• Crescent-Shaped Molecular Outflow from the Intermediate-mass Protostar DK Cha Revealed by ALMA

Naoto Harada, Kazuki Tokuda, Hayao Yamasaki, Asako Sato, Mitsuki Omura, Shingo Hirano, Toshikazu Onishi, Kengo Tachihara, Masahiro N. Machida

The Astrophysical Journal, Volume 945, Number 1, 63, 2023 March 7

• ALMA Fragmented Source Catalogue in Orion(FraSCO) I. Outflows interaction within an embedded cluster in OMC-2/FIR3,FIR4, and FIR5

Asako Sato, Satoko Takahashi, Shun Ishii, Paul T. P. Ho, Masahiro N. Machida, John Carpenter, Luis A. Zapata, Paula Stella Teixeira, Sumeyye Suri

The Astrophysical Journal, Volume 944, Number 1, 92, 2023 February 14

2022年

• Implementation of dust particles in three-dimensional magnetohydrodynamics simulation: dust dynamics in a collapsing cloud core

Shunta Koga, Kawasaki Yoshihiro and Machida N. Masahiro

Monthly Notices of the Royal Astronomical Society, Volume 515, Issue 4, October 2022, Pages 6073-6092

• Dust coagulation and fragmentation in a collapsing cloud core and their influence on non-ideal magnetohydrodynamic effects

Kawasaki Yoshihiro, Shunta Koga and Machida N. Masahiro

Monthly Notices of the Royal Astronomical Society, Volume 515, Issue 2, September 2022, Pages 2072-2087

• The First Detection of a Protostellar CO Outflow in the Small Magellanic Cloud with ALMA

Kazuki Tokuda, Sarolta Zahorecz, Yuri Kunitoshi, Kosuke Higashino, Kei E. I. Tanaka, Ayu Konishi, Taisei Suzuki, Naoya Kitano, Naoto Harada, Takashi Shimonishi, Naslim Neelamkodan, Yasuo Fukui, Akiko Kawamura, Toshikazu Onishi, and Masahiro N. Machida

The Astrophysical Journal Letters, Volume 936, Number 1, L6, 2022 September 1

• Synthetic Polarization Maps of an Outflow Zone from Magnetohydrodynamic Simulations

Gianfranco Bino, Shantanu Basu, Masahiro N. Machida, Aris Tritsis, Mahmoud Sharkawi, Kundan Kadam, and Indrani Das

The Astrophysical Journal, Volume 936, Number 1, 29, 2022 September 1

• Exponentially Amplified Magnetic Field Eliminates Disk Fragmentation around Population III Protostars

Shingo Hirano and Masahiro N. Machida

The Astrophysical Journal Letters, Volume 935, Number 1, L16, 2022 August 10

• Delivery of Gas onto the Circumplanetary Disk of Giant Planets: Planetary-mass Dependence of the Source Region of Accreting Gas and Mass Accretion Rate

Natsuho Maeda, Keiji Ohtsuki, Takayuki Tanigawa, Masahiro N. Machida, and Ryo Suetsugu

The Astrophysical Journal, Volume 935, Number 1, 56, 2022 August 10

• An ALMA Study of the Massive Molecular Clump N159W-North in the Large Magellanic Cloud: A Possible Gas Flow Penetrating One of the Most Massive Protocluster Systems in the Local Group

Tokuda Kazuki, Minami Taisei, Fukui Yasuo, Inoue Tsuyoshi, Nishioka Takeru, Tsuge Kisetsu, Zahorecz Sarolta, Sano Hidetoshi, Konishi Ayu, Rosie Chen C. -H., Sewiło Marta, Madden Suzanne C., Nayak Omnarayani, Saigo Kazuya, Nishimura Atsushi, Tanaka Kei E. I., Sawada Tsuyoshi, Indebetouw Remy, Tachihara Kengo, Kawamura Akiko, Onishi Toshikazu

The Astrophysical Journal, Volume 933, Number 1, 20, 2022 July 1

• Discovery of a Giant Molecular Loop in the Central Region of NGC 253

R. Konishi, R. Enokiya, Y. Fukui, K. Muraoka, Tokuda K., and T. Onishi

The Astrophysical Journal, Volume 929, Number 1, 63, 2022 April 10

• The role of magnetic fields in the formation of protostars, disks, and outflows

Yusuke Tsukamoto, Anaëlle Maury, Benoît Commerçon, Felipe O. Alves, Erin G. Cox, Nami Sakai, Tom Ray, Bo Zhao, and Masahiro N. Machida

chapter of Protostars and Planets VII (arXiv:2209.13765)

• Antarctic micrometeorite composed of CP and CS IDP-like material: A micro-breccia originated from a partially ice-melted comet-like small body

Takaaki Noguchi,Rikako Matsumoto, Hikaru Yabuta, Hanae Kobayashi, Akira Miyake, Hiroshi Naraoka, Ryuji Okazaki, Naoya Imae, Akira Yamaguchi, A. L. David Kilcoyne, Yasuo Takeichi, Yoshio Takahashi

Meteoritics & Planetary Science, Volume 57, Issue 11, 2042-2062

• First asteroid gas sample delivered by the Hayabusa2 mission: A treasure box from Ryugu

Ryuji Okazaki and 123 authors (Daiki Yamamoto (116th))

Science Advances, Volume 8, Issue 46

• Noble gases and nitrogen in samples of asteroid Ryugu record its volatile sources and recent surface evolution

Ryuji Okazaki and 122 authors (Daiki Yamamoto (114th))

Science, 20 October 2022

• Ryugu particles found outside the Hayabus2 sample container

Aiko Nakato and 16 authors (Ryuji Okazaki (15th))

Geochemical journal, Advance online publication 21 October 2022

• Environmental assessment in the prelaunch phase of Hayabusa2 for safety declaration of returned samples from the asteroid(162173) Ryugu: background monitoring and risk management during development of the sampler system

The Hayabusa2 Project Team

Earth, Planets and Space, Volume 74, Issue 1, 90, December 2022

• Presolar Stardust in Asteroid Ryugu

Jens Barosch and 124 authors (Ryuji Okazaki (122nd))

The Astrophysical Journal Letters, Volume 935, Number 1, L3, 2022 August 10

• The GAs Extraction and Analyses system(GAEA) for immediate extraction and measurements of volatiles in the Hayabusa2 sample container

Yayoi N. Miura,Ryuji Okazaki, Yoshinori Takano, Kanako Sakamoto, Shogo Tachibana, Keita Yamada, Saburo Sakai, Hirotaka Sawada

Earth, Planets and Space, Volume 74, Issue 1, 76, 2022 December

• Pebbles and sand on asteroid(162173) Ryugu: In situ observation and particles returned to Earth

Tachibana and 107 authors (Ryuji Okazaki (3rd))

Science, Volume 375, Issue 6584, Pages 1011-1016, 10 February 2022

2021年

• Preliminary analysis of the Hayabusa2 samples returned from C-type asteroid Ryugu

Toru yada and 101 authors (Daiki Yamamoto (19th), Ryuji Okazaki (36th))

Nature Astronomy, Volume 6, Isuue 1, Pages 214-220, 20 december 2021

• An exchange reaction between CAI melt and low-pressure water vapor under simulated Solar nebular conditions

Daiki Yamamoto, Noriyuki Kawasaki, Shogo Tachibana, Michiru Kamibayashi, Hisayoshi Yurimoto

Geochimica et Cosmochimica Acta, Volume 314, Pages 108-120, 1 December 2021

• Impact of magnetic braking on high-mass close binary formation

Naoto Harada, Shingo Hirano, Masahiro N. Machida, and Takashi Hosokawa

Monthly Notices of the Royal Astronomical Society, Volume 508, Issue 3, December 2021, Pages 3730–3747

• Can high-velocity protostellar jets help to drive low-velocity outflow?

Masahiro N. Machida

Monthly Notices of the Royal Astronomical Society, Volume 508, Issue 3, December 2021, Pages 3208–3225

• "Ashfall" Induced by Molecular Outflow in Protostar Evolution

Yusuke Tsukamoto, Masahiro N. Machida, and Shu-ichiro Inutsuka

The Astrophysical Journal Letters, Volume 920, Number 2, L35, 2021 October 20

• Supermassive Star Formation in Magnetized Atomic-cooling Gas Clouds: Enhanced Accretion, Intermittent Fragmentation, and Continuous Mergers

Shingo Hirano, Masahiro N. Machida, and Shantanu Basu

The Astrophysical Journal, Volume 917, Number 1, 34, 2021 August 10

• ALMA Observations toward the S-shaped Outflow and the Envelope around NGC 1333 IRAS 4A2

Chen-Yu Chuang, Yusuke Aso, Naomi Hirano, Shingo Hirano, Masahiro N. Machida

The Astrophysical Journal, Volume 916, Number 2, 82, 2021 August 1

• Complex structure of a proto-brown dwarf

B Riaz, and Masahiro N. Machida

Monthly Notices of the Royal Astronomical Society, Volume 504, Issue 4, July 2021, Pages 6049-6066

• Growth of magnetorotational instability in circumstellar discs around class 0 protostars

Yoshihiro Kawasaki, Shunta Koga, and Masahiro N. Machida

Monthly Notices of the Royal Astronomical Society, Volume 504, Issue 4, July 2021, Pages 5588-5611

• Super-fast Rotation in the OMC 2/FIR 6b Jet

Yuko Matsushita, Satoko Takahashi, Shun Ishii, Kohji Tomisaka, Paul T. P. Ho, John M. Carpenter, and Masahiro N. Machida

The Astrophysical Journal, Volume 916, Number 1, 23, 2021 July 20

• Conditions for Justifying Single-fluid Approximation for Charged and Neutral Dust Fluids and a Smoothed Particle Magnetohydrodynamics Method for Dust-Gas Mixture

Y. Tsukamoto, and M. N. Machida, and S. Inutsuka

The Astrophysical Journal, Volume 913, Number 2, 148, 2021 June 1

2020年

• Failed and delayed protosteller outflows with high-mass accretion rates

Masahiro N. Machida and Takashi Hosokawa

Monthly Notices of the Royal Astronomical Society, Volume 499, Issue 3, December 2020, Pages 4490-4514

• Testing Disk Identification Methods thtough Numerical Simulations of Protostellar Evolution

Yusuke Aso and Masahiro N. Machida

The Astrophysical Journal, Volume 905, Number 2, 174, 2020 December 20

• Delivery of Pebbles from the Protoplanetary Disk into Cirucumplanetary Disks

Toru Homma, Keiji Otsuki, Natsusho Maeda, Ryo Suetsugu,Masahiro N. Machida, and Takayuki Tanigawa

The Astrophysical Journal, Volume 903, Number 2, 98, 2020 November 10

• A Low-velocity Bipolar Outflow from a Deeply Embedded Object in Taurus Revealed by the Atacama Compact Array

Kakeru Fujishiro, Kazuki Tokuda, Kengo Tachihara, Tatsuyuki Takashima, Yasuo Fukui, Sarolta Zahorecz, Kazuya Saigo, Tomoaki Matsumoto, Kengo Tomida, andMasahiro N. Machida

The Astrophysical Journal Letters, Volume 899, Number L10, 2020 August 10

• FRagmantation and Evolution of Dense Cores Judged by ALMA(FREJA). I. Overview: Inner ~1000 au Structures of Prestellar/Protostellar Cores in Taurus

Kazuki Tokuda, Kakeru Fujishiro, Kngo Tachihara, Tatsuyuki Takashima, Yasuo Fukui, Sarolta Zahorecz, Kazuya Saigo, Tomoaki Matsumoto, Kengo Tomida, andMasahiro N. Machida

The Astrophysical Journal, Volume 899, Number 1, 10, 2020 August 10

• The Effect of Misalignment between the Rotation Axis and Magnetic Field on the Circumstellar Disk

Shingo Hirano, Yusuke Tsukamoto, Shantanu Basu, and Masahiro N. Machida

The Astrophysical Journal, Volume 898, Number 2, 118, 2020 August 1

• Twin Jets and Close Binary Formation

Yu Saiki and Masahiro N. Machida

The Astrophysical Journal Letters, Volume 897, Number 2, L22, 2020 July 10

• Early Evolution of Disk, Outflow, and Magnetic Field of Young Stellar Objects: Impact of Dust model

Y. Tsukamoto, M. N. Machida, H. Susa, H. Nomura, S. Inutsuka

The Astrophysical Journal,Volume 896, Number 2, 158, 2020 June 20

• Magnetic Field Structure of Orion Source I

Tomoya Hirota, Richard L. Plambeck, Melvyn C. H. Wright, Masahiro N. Machida, Yuko Matsushita, Kazuhito Motogi, Mi Kyoung Kim, Ross A. Burns, and Mareki Honma

The Astrophysical Journal,Volume 896, Number 2, 157, 2020 June 20

• Different modes of star formation - II. Gas accretion phase of initially subcritical star-forming clouds

Masahiro N. Machida and Shantanu Basu

Monthly Notices of the Royal Astronomical Society, Volume 494, Issue 1, May 2020, Pages 827-845

• Disk Structure atounr the Class I Protostar L1489 IRS Revelaled by ALMA: A Warped-disk System

Jinshi Sai, Nagayoshi Ohashi, Kazuya Saigo, Tomoaki Matsumoto, Yusuke Aso, Shigehisa Takakuwa, Yuri Aikawa, Ippei Kurose, Hsi-Wei Yen, Kohji Tomisaka, Kengo Tomida, and Masahiro N. Machida

The Astrophysical Journal,Volume 893, Number 1, 51, 2020 April 10

• Misalignment of magnetic fields, outflows, and discs in star-forming clouds

Masahiro N. Machida, Shingo Hirano, Hideyuki Kitta

Monthly Notices of the Royal Astronomical Society, Volume 491, Issue 2, January 2020, Pages 2180-2197

2019年

• Protostellar Evolution in Serpens Main: Possible Origin of Disk-size Diversity

Yusuke Aso, Naomi Hirano, Yuri Aikawa, Masahiro N. Machida, Nagayoshi Ohashi, Masao Saito, Shigehisa Takakuwa, Hsi-Wei Yen, and Jonathan P. Williams

The Astrophysical Journal, Volume 887, Number 2, 209, 2019 December 20

• A centrally concentrated sub-solar-mass starless core in the Taurus L1495 filamentary complex

Kazuki Tokuda, Kengo Tachihara, Kazuya Saigo, Phillipe André, Yosuke Miyamoto, Sarolta Zahorecz, Shu-ichiro Inutsuka, Tomoaki Matsumoto, Tatsuyuki Takashima, Masahiro N. Machida, Kengo Tomida, Kotomi Taniguchi, Yasuo Fukui, Akiko Kawamura, Ken'ichi Tatematsu, Ryo Kandori, Toshikazu Onishi

Publications of the Astronomical Society of Japan, Volume 71, Issue 4, August 2019, 73

• ALMA reveals a pseudo-disc in a proto-brown dwarf

B. Riaz, M. N. Machida, D. Stamatellos

Monthly Notices of the Royal Astronomical Society, Volume 486, Issue 3, July 2019, Pages 4114-4129

• Driving conditions of protostellar outflows in different star-forming environments

Koki Higuchi, Masahiro N. Machida, Hajime Susa

Monthly Notices of the Royal Astronomical Society, Volume 486, Issue 3, July 2019, Pages 3741-3754

• Origin of misalignments: protostellar jet, outflow, circumstelar disc, and magnetic field

Shingo Hirano and Masahiro N. Machida

Monthly Notices of the Royal Astronomical Society, Volume 485, Issue 4, June 2019, Pages 4667-4674

• The First Bird's-eye View of a Gravitationally Unstable Accretion Disk in High-mass Star Formation

Kazuhito Motogi, Tomoya Hirota, Masahiro N. Machida, Yoshinori Yonekura, Mareki Honma, Shigehisa Takakuwa, and Satoki Matsushita

The Astrophysical Journal Letters, Volume 877, Number 2, L25, 2019 June 1

• The First Two Thousand Years of Star Formation

Masahiro N. Machida and Shantanu Basu

The Astrophysical Journal, Volume 876, Number 2, 149, 2019 May 10

• Dependence of Hall coefficient on grain size and cosmic ray rate and implication for circumstellar disc formation

Shunta Koga, Yusuke Tsukamoto, Satoshi Okuzumi, Masahiro N. Machida

Monthly Notices of the Royal Astronomical Society, Volume 484, Issue 2, April 2019, Pages 2119-2136

• ALMA High Anglular Resolution Polarization Study: An Exrtemely Young Class 0 Source, OMC-3/MMS 6

Satoko Takahashi, Masahiro N. Machida, Kohji Tomisaka, Paul T. P. Ho, Edward B. Fomalont, Kouichiro Nakanishi, and Josep Miquel Girart

The Astrophysical Journal, Volume 872, Number 1, 70, 2019 February 10

• Extremely High Excitation SiO Lines in Disk-outflow Systems in Orion Source I

Mi Kyoung Kim, Tomoya Hirota, Masahiro N. Machida,Yuko Matsushita, Kazuhito Motogi, Naoko Matsumoto, and Mareki Honma

The Astrophysical Journal, Volume 872, Number 1, 64, 2019 February 10

• A Very Compact Extremely High Velocity Flow toward MMS5/OMC-3 Revealed with ALMA

Yuko Matsushita, Satoko Takahashi, Masahiro N. Machida, and Kohji Tomisaka

The Astrophysical Journal, Volume 871, Number 2, 221, 2019 February 1

• Radio borad-band visualization of global three-dimensional magnetohydrodynamical simulations of spiral galaxies - II. Faraday depolarization from 100 MHz to 10GHz

M. Machida, T. Akahori, K. E. Nakamura, H. Nakanishi, and M. Haverkorn

Monthly Notices of the Royal Astronomical Society, Volume 482, Issue 3, January 2019, Pages 3394-3402