Academia Sinica Institute of Astronomy & Astrophysics
中央研究院天文及天文物理研究所
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0.9-mm dust-continuum image of the protostellar binary L1551 NE observed with ALMA (left), and that predicted from our supercomputer numerical simulation (right). Green curves in the left panel traces the observed structures of the circumbinary spirals (Takakuwa et al. 2014, ApJ, 796, 1).
ALMA Observation of Gas Spirals as a Nursery of Binary Stars
Dust distribution in the binary protostellar system L1551 NE observed with the SMA in 0.9 mm continuum. Crosses show the position of each binary component. Dashed curves delineate the ring-like “circumbinary disk” components. (Takakuwa et al. 2012, ApJ, 754, 52)
Dust distribution in the binary protostellar system L1551 NE observed with the SMA in 0.9 mm continuum.
The 7 mm continuum image of the binary protostellar system L1551 IRS 5 obtained with the VLA (Lim and Takakuwa 2006, ApJ, 653, 425).
The 7 mm Continuum Image of the Binary Protostellar System L1551 IRS 5
Molecular-line spectra toward L1521F (left) and IRAM 04191+1522 (right). Spectra from molecules such as C3H2, CH3CCH, and C4H, so-called "carbon-chain" molecules, are more intense in L1521F than in IRAM 04191+1522.
Carbon-chain and Organic Molecules around Very Low Luminosity Protostellar Objects of L1521F-IRS and IRAM 04191+1522
Morphology (contour) and kinematics (color scale) of envelopes around a sample of Class 0 and I protostars seen in the C18O (2-1) emission observed with the SMA. The color scale shows gas motions moving away from us (redshifted) and toward us (blueshifted). Dashed lines denote the rotational axes of these envelopes, and black crosses represent the positions of the protostars.
Rotating Gas Motion around Protostars
(TOP) Near-Infrared composite color image of L1551 NE observed with SUBARU (Hayashi & Pyo 2009). The blue, green, and red colors are assigned to the H, [Fe II], and H2 filter frames, respectively. (Bottom) Moment 0 (white contours) and Moment 1 maps (color scale) of the 13CO (J=3-2) (Left) and C18O (J=3-2) lines (Right) in L1551 NE observed with the SMA. Contour levels are from 2σ in steps of 4σ (1σ = 0.189 Jy beam-1 km s-1) in the 13CO moment 0 map and 2σ in steps of 2σ (1σ = 0.173 Jy beam-1 km s-1) in the C18O moment 0 map. Crosses indicate the positions of the protobinary, and filled ellipses at the bottom-right corners the synthesized beam. Blue and red arrows show the direction of the blueshifted and redshifted [Fe II] jets driven by Source A. The submillimeter circumbinary features show clear velocity gradients along the major axis, and furthermore, the observed velocity gradients can be well-reproduced by a geometrically-thin Keplerian Disk with the central mass of 0.8 Msolar.
A Keplerian Circumbinary Disk around the Protostellar System L1551 NE
Takakuwa, Shigehisa
Visiting Scholar (Kagoshima University)
photo of Takakuwa, Shigehisa
Email: takakuwa_replace2@_sci.kagoshima-u.ac.jp

Education and Positions

  • Professor, Kagoshima University, Japan (2016~present)
  • Associate Research Fellow, ASIAA (2011~2016)
  • Assistant Research Fellow, ASIAA (2007~2011)
  • Postdoctoral Fellow, National Astronomical Observatory of Japan – ALMA Project Office (2005~2007)
  • Postdoctoral Fellow, Harvard-Smithsonian Center for Astrophysics – Submillimeter Array Project (2002~2005)
  • Postdoctoral Fellow, ASIAA (1999~2002)
  • B.S., Astronomy, University of Tokyo (1990~1994)
  • Ph.D., Astronomy, University of Tokyo (1999)
  • M.S., Astronomy, University of Tokyo (1996)

Research Interests

My major research is to study how solar-type stars form in the clouds of molecular gas and dust in the interstellar space. I have two specific strategies to study star formation. One is observing emission from various molecules at millimeter wavelengths in star-forming clouds and studying chemistry of the clouds, because the chemical evolution of the clouds can be linked to the physical evolution into the star formation. The other strategy is single-dish and interferometric observations of molecular emission at submillimeter wavelengths, with the forefront submillimeter telescopes such as SMA, ASTE, and ALMA. Submillimeter molecular lines trace warmer molecular gas, allowing us to study the close vicinity of the forming star.

Journal Papers affiliated with ASIAA

  1. Takaishi D; Tsukamoto Y; Kido M; Takakuwa S; Misugi Y; Kudoh Y; Suto Y, "Formation of Unipolar Outflow and Protostellar Rocket Effect in Magnetized Turbulent Molecular Cloud Cores" , ApJ: 963(1), id.20 (14 pp), Mar, 2024 [SCI] ( ADS | Fulltext )
  2. Takakuwa S; Saigo K; Kido M; Ohashi N; Tobin JJ; Jørgensen JK; Aikawa Y; Aso Y; Gavino S; Han I; Koch PM; Kwon W; Lee CW; Lee J-E; Li Z-Y; Lin Z-YD; Looney LW; Mori S; Sai J; Sharma R; Sheehan PD; Tomida K; Williams JP; Yamato Y; Yen H-W, "Early Planet Formation in Embedded Disks (eDisk). XIV. Flared Dust Distribution and Viscous Accretion Heating of the Disk around R CrA IRS 7B-a" , ApJ: 964(1), id.24 (21pp), Mar, 2024 [SCI] ( ADS | Fulltext )
  3. Aso Y; Kwon W; Ohashi N; Jørgensen JK; Tobin JJ; Aikawa Y; De Gregorio-Monsalvo I; Han I; Kido M; Koch PM; Lai S-P; Lee CW; Lee J-E; Li Z-Y; Lin Z-YD; Looney LW; Narayanan S; Phuong NT; Sai J (Insa Choi) ; Saigo K; Santamaría-Miranda A; Sharma R; Takakuwa S; Thieme TJ; Tomida K; Williams JP; Yen H-W, "Early Planet Formation in Embedded Disks (eDisk). VI. Kinematic Structures around the Very-low-mass Protostar IRAS 16253-2429" , ApJ: 954(1), id.101 (17pp), Sep, 2023 [SCI] ( ADS | Fulltext )
  4. Flores C; Ohashi N; Tobin JJ; Jørgensen JK; Takakuwa S; Li Z-Y; Lin Z-YD; Van 'T Hoff MLR; Plunkett AL; Yamato Y; Sai J; Koch PM; Yen H-W; Aikawa Y; Aso Y; De Gregorio-Monsalvo I; Kido M; Kwon W; Lee J-E; Lee CW; Looney LW; Santamaría-Miranda A; Sharma R; Thieme TJ; Williams JP; Han I; Narayanan S; Lai S-P, "Early Planet Formation in Embedded Disks (eDisk). XII. Accretion Streamers, Protoplanetary Disk, and Outflow in the Class I Source Oph IRS 63" , ApJ: 958(1), id.98 (22 pp), Nov, 2023 [SCI] ( ADS | Fulltext )
  5. Kido M; Takakuwa S; Saigo K; Ohashi N; Tobin JJ; K J; Jørgensen; Aikawa Y; Aso Y; Encalada FJ; Flores C; Gavino S; de Gregorio-Monsalvo I; Han I; Hirano S; Koch PM; Kwon W; Lai S-P; Lee CW; Lee J-E; Li Z-Y; Lin Z-YD; Looney LW; Mori S; Narayanan S; Plunkett AL; Phuong NT; Sai J (Choi I); Santamarîa-Miranda A; Sharma R; Sheehan P; Thieme TJ; Tomida K; van't Hoff MLR; Williams JP; Yamato Y; Yen H-W, "Early Planet Formation in Embedded Disks (eDisk). VII. Keplerian Disk, Disk Substructure, and Accretion Streamers in the Class 0 Protostar IRAS 16544-1604 in CB 68" , ApJ: 953(2), id.190 (22 pp), Aug, 2023 [SCI] ( ADS | Fulltext )
  6. Kitayama T; Ueda S; Okabe N; Akahori T; Hilton M; Hughes JP; Ichinohe Y; Kohno K; Komatsu E; Lin Y-T; Miyatake H; Oguri M; Sifón C; Takakuwa S; Takizawa M; Tsutsumi T; Van Marrewijk J; Wollack EJ, "Galaxy clusters at z 1 imaged by ALMA with the Sunyaev-Zel'dovich effect" , PASJ: 75(2), 311-337, April, 2023 [SCI] ( ADS | Fulltext )
  7. Lin Z-YD; Li Z-Y; Tobin JJ; Ohashi N; Jørgensen JK; Looney LW; Aso Y; Takakuwa S; Aikawa Y; Van't Hoff MLR; De Gregorio-Monsalvo I; Encalada FJ; Flores C; Gavino S; Han I; Kido M; Koch PM; Kwon W; Lai S-P; Lee CW; Lee J-E; Phuong NT; Sai Insa Choi J; Sharma R; Sheehan P; Thieme TJ; Williams JP; Yamato Y; Yen H-W, "Early Planet Formation in Embedded Disks (eDisk). II. Limited Dust Settling and Prominent Snow Surfaces in the Edge-on Class I Disk IRAS 04302+2247" , ApJ: 951(1), id.9 (26 pp), July, 2023 [SCI] ( ADS | Fulltext )
  8. Narayanan S; Williams JP; Tobin JJ; Jorgensen JK; Ohashi N; Lin Z-YD; van't Hoff MLR; Li Z-Y; Plunkett AL; Looney LW; Takakuwa S; Yen H-W; Aso Y; Flores C; Lee J-E; Lai S-P; Kwon W; de Gregorio-Monsalvo I; Sharma R; Lee CW, "Early Planet Formation in Embedded Disks (eDisk). X. Compact Disks, Extended Infall, and a Fossil Outburst in the Class I Oph IRS43 Binary" , ApJ: 958(1), id.20 (10 pp), Nov, 2023 [SCI] ( ADS | Fulltext )
  9. Ohashi N; Tobin JJ; Jørgensen JK; Takakuwa S; Sheehan P; Aikawa Y; Li Z-Y; Looney LW; Williams JP; Aso Y; Sharma R; Sai J (Choi I); Yamato Y; Lee J-E; Tomida K; Yen H-W; Encalada FJ; Flores C; Gavino S; Kido M; Han I; Lin Z-YD; Narayanan S; Phuong NT; Santamaría-Miranda A; Thieme TJ; Van't Hoff MLR; De Gregorio-Monsalvo I; Koch PM; Kwon W; Lai S-P; Lee CW; Plunkett A; Saigo K; Hirano S; Lam KH; Mori S, "Early Planet Formation in Embedded Disks (eDisk). I. Overview of the Program and First Results" , ApJ: 951(1), id.8 (26pp), July, 2023 [SCI] ( ADS | Fulltext )
  10. Sai J; Yen H-W; Ohashi N; Tobin JJ; Jørgensen JK; Takakuwa S; Saigo K; Aso Y; Lin Z-YD; Koch PM; Aikawa Y; Flores C; De Gregorio-Monsalvo I; Han I; Kido M; Kwon W; Lai S-P; Lee CW; Lee J-E; Li Z-Y; Looney LW; Mori S; Phuong NT; Santamaría-Miranda A; Sharma R; Thieme TJ; Tomida K; Williams JP, "Early Planet Formation in Embedded Disks (eDisk). V. Possible Annular Substructure in a Circumstellar Disk in the Ced110 IRS4 System" , ApJ: 954(1), id.67 (25pp), Sep, 2023 [SCI] ( ADS | Fulltext )
  11. Sharma R; Jørgensen JK; Gavino S; Ohashi N; Tobin JJ; Lin Z-YD; Li Z-Y; Takakuwa S; Lee CW; Sai J (Insa Choi); Kwon W; De Gregorio-Monsalvo I; Santamaría-Miranda A; Yen H-W; Aikawa Y; Aso Y; Lai S-P; Lee J-E; Looney LW; Phuong NT; Thieme TJ; Williams JP, "Early Planet Formation in Embedded Disks (eDisk). IX. High-resolution ALMA Observations of the Class 0 Protostar R CrA IRS5N and Its Surroundings" , ApJ: 954(1), id.69 (22 pp), Sep, 2023 [SCI] ( ADS | Fulltext )
  12. Taniguchi K; Majumdar L; Caselli P; Takakuwa S; Hsieh T-H; Saito M; Li Z-Y; Dobashi K; Shimoikura T; Nakamura F; Tan JC; Herbst E, "Chemical Differentiation around Five Massive Protostars Revealed by ALMA: Carbon-chain Species and Oxygen/Nitrogen-bearing Complex Organic Molecules" , ApJS: 267(1), id.4 (27pp), July, 2023 [SCI] ( ADS | Fulltext )
  13. Thieme TJ; Lai S-P; Ohashi N; Tobin JJ; Jørgensen JK; Sai J; Aso Y; Williams JP; Yamato Y; Aikawa Y; de Gregorio-Monsalvo I; Han I; Kwon W; Lee CW; Lee J-E; Li Z-Y; Lin Z-YD; Looney LW; Narayanan S; Phuong NT; Plunkett AL; Santamaría-Miranda A; Sharma R; Takakuwa S; Yen H-W, "Early Planet Formation in Embedded Disks (eDisk). VIII. A Small Protostellar Disk around the Extremely Low Mass and Young Class 0 Protostar IRAS 15398-3359" , ApJ: 958(1), id.60 (22pp), Nov, 2023 [SCI] ( ADS | Fulltext )
  14. Van't Hoff MLR; Tobin JJ; Li Z-Y; Ohashi N; Jørgensen JK; Lin Z-YD; Aikawa Y; Aso Y; De Gregorio-Monsalvo I; Gavino S; Han I; Koch PM; Kwon W; Lee CW; Lee J-E; Looney LW; Narayanan S; Plunkett A; Sai J (Choi I); Santamaría-Miranda A; Sharma R; Sheehan PD; Takakuwa S; Thieme TJ; Williams JP; Lai S-P; Phuong NT; Yen H-W, "Early Planet Formation in Embedded Disks (eDisk). III. A First High-resolution View of Submillimeter Continuum and Molecular Line Emission toward the Class 0 Protostar L1527 IRS" , ApJ: 951(1), id.10 (29pp), July, 2023 [SCI] ( ADS | Fulltext )
  15. Yamato Y; Aikawa Y; Ohashi N; Tobin JJ; Jørgensen JK; Takakuwa S; Aso Y; Choi J; Flores C; De Gregorio-Monsalvo I; Hirano S; Han I; Kido M; Koch PM; Kwon W; Lai S-P; Lee CW; Lee J-E; Li Z-Y; Lin Z-YD; Looney LW; Mori S; Narayanan S; Phuong NT; Saigo K; Santamaría-Miranda A; Sharma R; Thieme TJ; Tomida K; Van't Hoff MLR; Yen H-W, "Early Planet Formation in Embedded Disks (eDisk). IV. The Ringed and Warped Structure of the Disk around the Class I Protostar L1489 IRS" , ApJ: 951(1), id.11 (20pp), July, 2023 [SCI] ( ADS | Fulltext )
  16. Yen H-W; Koch P; Lee C-F; Hirano N; Ohashi N; Sai J (Choi I); Takakuwa S; Tang Y-W; Tatematsu KI; Zhao B, "Increasing mass-to-flux ratio from the dense core to the protostellar envelope around the Class 0 protostar HH 211" , ApJ: 942(1), id.32 (20 pp), Jan, 2023 [SCI] ( ADS | Fulltext )
  17. Sheehan PD; Tobin JJ; Li Z-Y; Van 'T Hoff MLR; Jørgensen JK; Kwon W; Looney LW; Ohashi N; Takakuwa S; Williams JP; Aso Y; Gavino S; De Gregorio-Monsalvo I; Han I; Lee CW; Plunkett A; Sharma R; Aikawa Y; Lai S-P; Lee J-E; Lin Z-YD; Saigo K; Tomida K; Yen H-W, "A VLA View of the Flared, Asymmetric Disk Around the Class 0 Protostar L1527 IRS" , ApJ: 934(2), id.95 (14 pp), Aug, 2022 [SCI] ( ADS | Fulltext )
  18. Taniguchi K; Tanaka KEI; Zhang Y; Fedriani R; Tan JC; Takakuwa S; Nakamura F; Saito M; Majumdar L; Herbst E, "Vibrationally Excited Lines of HC3N Associated with the Molecular Disk around the G24.78+0.08 A1 Hypercompact H II Region" , ApJ: 931(2), id.99 (17pp), June, 2022 [SCI] ( ADS | Fulltext )
  19. Ichikawa T; Kido M; Takaishi D; Shimajiri Y; Tsukamoto Y; Takakuwa S, "Misaligned Circumstellar Disks and Orbital Motion of the Young Binary XZ Tau" , ApJ: 919(1), id.55 (18pp), Sep, 2021 [SCI] ( ADS | Fulltext )
  20. Kitayama T; Ueda S; Akahori T; ...; Takakuwa S; et al., "Deeply cooled core of the Phoenix galaxy cluster imaged by ALMA with the Sunyaev─Zel'dovich effect" , PASJ: 72(2), id.33 (18 pp.), Apr, 2020 [SCI] ( ADS | Fulltext )
  21. Sai J; Ohashi N; Saigo K; ...; Aso Y; Takakuwa S; ...; Yen H-W; et al., "Disk Structure around the Class I Protostar L1489 IRS Revealed by ALMA: A Warped-disk System" , ApJ: 893(1), id.51 (26pp.), Apr, 2020 [SCI] ( ADS | Fulltext )
  22. Takakuwa S; Saigo K; Matsumoto T; ...; Lim J; Yen H-W; Ohashi N; Ho PTP; et al., "Circumbinary Disks of the Protostellar Binary Systems in the L1551 Region" , ApJ: 898(1), id.10 (22pp.), Jul, 2020 [SCI] ( ADS | Fulltext )
  23. Yen H-W; Zhao B; Koch P; Krasnopolsky R; Li Z-Y; Ohashi N; Shang H; Takakuwa S; Tang Y-W, "Transition from Ordered Pinched to Warped Magnetic Field on a 100 au Scale in the Class 0 Protostar B335" , ApJ: 893(1), id.54 (11pp.), Apr, 2020 [SCI] ( ADS | Fulltext )
  24. Aso Y; Hirano N; ...; Ohashi N; ...; Takakuwa S; Yen H-W; et al., "Protostellar Evolution in Serpens Main: Possible Origin of Disk-size Diversity" , ApJ: 877(2), id. 209 (14 pp.), Dec, 2019 [SCI] ( ADS | Fulltext )
  25. Kamazaki T; Nakamura F; Kawabe R; ...; Takakuwa S; Hirano N; et al., "ALMA Observations of the ρ Ophiuchus B2 Region. I. Molecular Outflows and Their Driving Sources" , ApJ: 871(1), id. 86 (20 pp.), Jan, 2019 [SCI] ( ADS | Fulltext )
  26. Matsumoto T; Saigo K; Takakuwa S, "Structure of a Protobinary System: An Asymmetric Circumbinary Disk and Spiral Arms" , ApJ: 871(1), id. 36 (17 pp.), Jan, 2019 [SCI] ( ADS | Fulltext )
  27. Sahu D; Liu S-Y; Sue Y-N; ...; Lee CF; Hirano N; Takakuwa S, "Implications of a Hot Atmosphere/Corino from ALMA Observations toward NGC 1333 IRAS 4A1" , ApJ: 872(2), id. 196 (14pp), Feb, 2019 [SCI] ( ADS | Fulltext )
  28. Su Y-N; Liu S-Y; Li Z-Y; Lee C-F; Hirano N; Takakuwa S; Hsieh I-T, "The Infall Motion in the Low-mass Protostellar Binary NGC 1333 IRAS 4A1/4A2" , ApJ: 885(2), id. 98 (16 pp.), Nov, 2019 [SCI] ( ADS | Fulltext )
  29. Yen H-W; Gu P-G; Hirano N; Koch PM; Lee C-F; Liu HB; Takakuwa S, "HL Tau Disk in HCO+ (3-2) and (1-0) with ALMA: Gas Density, Temperature, Gap, and One-arm Spiral" , ApJ: 880(2), id. 69 (18 pp.), Aug, 2019 [SCI] ( ADS | Fulltext )
  30. Yen H-W; Takakuwa S; Gu P-G; Hirano N; Lee CF; Liu HB; Liu SY; Wu CJ, "Signs of outflow feedback from a nearby young stellar object on the protostellar envelope around HL Tauri" , A&A: 623, id. A96 (20 pp.), Mar, 2019 [SCI] ( ADS | Fulltext )
  31. Yen H-W; Zhao B; Hsieh I-T; Koch P; Krasnopolsky R; Lee C-F; Li Z-Y; Liu S-Y; Ohashi N; Takakuwa S; Tang Y-W; et al., "JCMT POL-2 and ALMA Polarimetric Observations of 6000─100 au Scales in the Protostar B335: Linking Magnetic Field and Gas Kinematics in Observations and MHD Simulations" , ApJ: 871(2), id. 243 (18 pp.), Feb, 2019 [SCI] ( ADS | Fulltext )
  32. Aso Y; Hirano N; Aikawa Y; Machida MN; Takakuwa S; Yen HW; Williams JP, "The Distinct Evolutionary Nature of Two Class 0 Protostars in Serpens Main SMM4" , ApJ: 863(1), id. 19 (16 pp.), Aug, 2018 [SCI] ( ADS | Fulltext )
  33. Kawabe R; Hara C; Nakamura F; ...; Takakuwa S; ...; Hirano N; et al., "Extremely Dense Cores Associated with Chandra Sources in Ophiuchus A: Forming Brown Dwarfs Unveiled?" , ApJ: 866(2), id. 141 (15 pp.), Oct, 2018 [SCI] ( ADS | Fulltext )
  34. Koch PM; Tang Y-W; Ho PTP; Yen H-W; Su Y-N; Takakuwa S, "Polarization Properties and Magnetic Field Structures in the High-Mass Star-Forming Region W51 Observed with ALMA" , ApJ: 855(1), id. 39 (19 pp.), March, 2018 [SCI] ( ADS | Fulltext )
  35. Takakuwa S; Tsukamoto Y; Saigo K; Saito M, "Possible Counterrotation between the Disk and Protostellar Envelope around the Class I Protostar IRAS 04169+2702" , ApJ: 865(1), id. 51 (17 pp.), Sep, 2018 [SCI] ( ADS | Fulltext )
  36. Ueda S; Kitayama T; Oguri M; ...; Takakuwa S; et al., "A Cool Core Disturbed: Observational Evidence for the Coexistence of Subsonic Sloshing Gas and Stripped Shock-heated Gas around the Core of RX J1347.5─1145" , ApJ: 866(1), id. 48 (13 pp.), Oct, 2018 [SCI] ( ADS | Fulltext )
  37. Wu C-J; Hirano N; Takakuwa S; Yen H-W; Aso Y, "Physical and Chemical Conditions of the Protostellar Envelope and the Protoplanetary Disk in HL Tau" , ApJ: 869(1), id. 59 (17 pp.), Dec, 2018 [SCI] ( ADS | Fulltext )
  38. Yen H-W; Zhao B; Koch PM; Krasnopolsky R; Li Z-Y; Ohashi N; Takakuwa S, "Constraint on ion-neutral drift velocity in the Class 0 protostar B335 from ALMA observations" , A&A: 615, id.A58 (11 pp.), July, 2018 [SCI] ( ADS | Fulltext )
  39. Aso Y; Ohashi N; Aikawa Y; ...; Takakuwa S; ...; Yen HW; et al., "ALMA Observations of SMM11 Reveal an Extremely Young Protostar in Serpens Main Cluster" , ApJL: 850(1), L2, Nov 20, 2017 [SCI] ( ADS | Fulltext )
  40. Aso Y; Ohashi N; Aikawa Y;...; Takakuwa S;...; Yen HW, "ALMA Observations of the Protostar L1527 IRS: Probing Details of the Disk and the Envelope Structures" , ApJ: 849 (1), 56, Nov 1, 2017 [SCI] ( ADS | Fulltext )
  41. Takakuwa S; Saigo K; Matsumoto T; ...; Yen H-W; Ho PTP, "Spiral Arms, Infall, and Misalignment of the Circumbinary Disk from the Circumstellar Disks in the Protostellar Binary System L1551 NE" , ApJ: 837(1), 86, March, 2017 [SCI] ( ADS | Fulltext )
  42. Yen H-W; Koch PM; Takakuwa S; Krasnopolsky R; Ohashi N; et al., "Signs of Early-stage Disk Growth Revealed with ALMA" , ApJ: 834(2), 178, Jan, 2017 [SCI] ( ADS | Fulltext )
  43. Hirashita H; Koch PM; Matsushita S; Takakuwa S; Nakamura M; Asada K; Liu HB; Urata U; Wang M-J; Wang W-H; Takahashi S; Tang Y-W; Chang H-H; Huang K; Morata O; Otsuka M; Lin K-Y; Tsai A-L; Lin Y-T; Srinivasan S; Martin-Cocher P; Pu J-Y; Kemper F; Patel N; Grimes P; Huang Y-D; Han C-C; Huang Y-R; Nishioka H; Lin C-CL; Zhang Q; Keto E; Burgos R; Chen M-T; Inoue M; Ho PTP, "First-generation Science Cases for Ground-based Terahertz Telescopes" , PASJ: 68(1), R1, Feb, 2016 [SCI] ( ADS | Fulltext )
  44. Kitayama T; Ueda S; Takakuwa S; et al., "The Sunyaev-Zel'dovich effect at 5″: RX J1347.5-1145 imaged by ALMA" , PASJ: 68(5), 88, Oct, 2016 [SCI] ( ADS | Fulltext )
  45. Leung GYC; Lim J; Takakuwa S, "Tracing Infall and Rotation along the Outflow Cavity Walls of the L483 Protostellar Envelope" , ApJ: 833(1), 55, Dec, 2016 [SCI] ( ADS | Fulltext )
  46. Lim J; Yeung PKH; Hanawa T; Takakuwa S; et al., "Rotationally driven Fragmentation in the Formation of the Binary Protostellar System L1551 IRS 5" , ApJ: 826(2), 153, Aug 1, 2016 [SCI] ( ADS | Fulltext )
  47. Yen H-W; Liu HB; Gu P-G; Hirano N; Lee C-F ; Puspitaningrum E; Takakuwa S, "Gas Gaps in the Protoplanetary Disk around the Young Protostar HL Tau" , ApJL: 820(2), L25, April 1, 2016 [SCI] ( ADS | Fulltext )
  48. Yen HW; Koch PM ; Liu HB; Puspitaningrum E; Hirano N; Lee CF; Takakuwa S, "Stacking Spectra in Protoplanetary Disks: Detecting Intensity Profiles from Hidden Molecular Lines in HD163296" , ApJL: 832(2), 204, Dec, 2016 [SCI] ( ADS | Fulltext )
  49. ALMA Partnership; Brogan CL; Pérez LM; ...; Matsushita S; ...; Takahashi S; Lee C-F; ...; Takakuwa S; ...; Liu H-Y; et al., "The 2014 ALMA Long Baseline Campaign: First Results from High Angular Resolution Observations toward the HL Tau Region" , ApJL: 808(1), L3, July 20, 2015 [SCI] ( ADS | Fulltext )
  50. Aso Y; Ohashi N; Saigo K; ...; Takakuwa S; ...; Yen H-W, "ALMA Observations of the Transition from Infall Motion to Keplerian Rotation around the Late-phase Protostar TMC-1A" , ApJ: 812(1), 27, Oct, 2015 [SCI] ( ADS | Fulltext )
  51. Higuchi A; Saigo K; Chibueze J; Sanhueza P; Takakuwa S; Garay G, "IRAS 16547-4247: A New Candidate of a Protocluster Unveiled with ALMA" , ApJL: 798(2), L33, Jan, 2015 [SCI] ( ADS | Fulltext )
  52. Shimajiri Y; Sakai T; Kitamura Y; ...; Takakuwa S; et al. ,, "Spectral-Line Survey at Millimeter and Submillimeter Wavelengths toward an Outflow-Shocked Region, OMC 2-FIR 4" , ApJS: 221(2), 31, Dec, 2015 [SCI] ( ADS | Fulltext )
  53. Takakuwa S; Kiyokane K; Saigo K; Saito M, "Dispersing Envelope around the Keplerian Circumbinary Disk in L1551 NE and its Implications for the Binary Growth" , ApJ: 814, 160, Dec, 2015 [SCI] ( ADS | Fulltext )
  54. Yen H-W; Koch PM; Takakuwa S; Ho PTP; Ohashi N; Tang Y-W, "Observations of Infalling and Rotational Motions on a 1000 AU Scale around 17 Class 0 and 0/I Protostars: Hints of Disk Growth and Magnetic Braking?" , ApJ: 799(2), 193, Feb 1, 2015 [SCI] ( ADS | Fulltext )
  55. Yen H-W; Takakuwa S; Koch PM; ...; Krasnopolsky R; Ohashi N, "No Keplerian Disk >10 AU around the Protostar B335: Magnetic Braking or Young Age?" , ApJ: 812(2), 129, Oct 20, 2015 [SCI] ( ADS | Fulltext )
  56. Chitsazzadeh S; Di Francesco J; Schnee S; ...; Takakuwa S; et al., "Physical and Chemical Characteristics of L1689-SMM16, an Oscillating Prestellar Core in Ophiuchus" , ApJ: 790(2), 129, Aug 1, 2014 [SCI] ( ADS | Fulltext )
  57. Chou T-L; Takakuwa S; Yen H-W; Ohashi N; Ho PTP, "Transition from the Infalling Envelope to the Keplerian Disk around L1551 IRS 5" , ApJ: 796(1), 70, Nov 20, 2014 [SCI] ( ADS | Fulltext )
  58. Koyamatsu S; Takakuwa S; Hayashi M; Mayama S; Ohashi N, "The Disappearing Envelope around the Transitional Class I Object L43" , ApJ: 789(2), 95, July, 2014 [SCI] ( ADS | Fulltext )
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