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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Left: Filamentary structure observed in the Orion Molecular Cloud obtained in the 850 µm continuum emission taken with the JCMT/SCUBA (Johnstone & Bally 1999) Right: SMA 850 µm continuum image (color) obtained with 85-pointing mosaic observations overlaid with the 850 µm continuum image taken with the JCMT/SCUBA (black contours)
The SMA successfully imaged the thermal dust emission at 0.85 mm from the 0.9 x 0.3 pc area of Orion Molecular Cloud-3 (OMC-3), which is located to the north of Orion nebula M42
Blueshifted and redshifted outflow components obtained in the CO (2-1) emission with SMA (this work), superposed on the infrared reflection nebula obtained in the 4.5 um image with Spitzer/IRAC (Bourke et al. 2006)
Direct Imaging of a Compact Molecular Outflow from a Very Low-luminosity Object
Left: 850 micron continuum image obtained with SMA. Right: Visibility-amplitude plot overlaid with modeled prestellar and protostellar cores.
Spatially Resolving Substructures within the Massive Protostellar Envelope in Orion
Blue shifted disk wind from HD 163296. The grey-scale shows the CO J=2-1 integrated intensity of the blue shifted wind from HD 163296. The 4σ level is indicated by the grey contour. The blue and red contours show the 15, 20 and 25 times the rms noise of the blue and red HCO+ J=4-3 emission in the disk. The inset image shows the first moment map of the HCO+ J=4-3 emission in the disk, with the same red and blue contours. The two black arcs show the primary beams of the 345 GHz (smaller) and 230 GHz (larger) observations. The cyan contours show 4, 6, and 8 times the rms noise in the CO J=3-2 emission. The two solid purple circles show the expected positions of Herbig Haro knots A2 and A3 in 2012. The dashed purple circle and arrow show the position of knot A2 in 2004, and its projected motion to 2012. The two dark cyan circles in the bottom left corner show the synthesized beams of the 345GHz (left) and 230 GHZ (right) datasets.
ALMA detection of the rotating molecular disk wind from the young star HD 163296
The CO J=3-2 channel map unveils for the first time at sub-millimeter frequencies the vertical structure details of a protoplanetary disks, showing the back and front side of the flared disk of HD163296
Unveiling the gas and dust disk structure in HD163296 using ALMA observations
Integrated emission map of H13CO+ (4-3) with contours showing 3, 5 and 7 sigma (left), and DCO+ (5-4) with contours showing 3 and 5 sigma. The H13CO+ is centrally peaked onto the star whereas the DCO+ emission displays a ring, corresponding to the location of the CO snowline (the white contour indicate the location where the midplane temperature reach 19K (i.e. the CO freeze-out temperature).
ALMA imaging of the CO snowline of the HD163296 disk with DCO+
CO(2-1) integrated intensity map of the newly discovered molecular arm close to NGC4039 (Espada et al. 2012 ApJ, 760L, 25E). The plus signs indicate the clumps.
Giant molecular clouds and star formation in the tidal molecular arm of NGC 4039
The discovered outflow lobe size (~1000 AU; left panel of the figure) is the smallest molecular outflow ever found in the intermediate-mass protostellar cores. The line width dramatically increases downstream at the end of the molecular outflow (right panel of Figure) and clearly shows the bow-shock-type velocity structure.
The Discovery of the Youngest Molecular Outflow Associated with an Intermediate-mass Protostellar Core in Orion
Highest angular resolution achieved with the SMA 850 micron continuum observations has revealed detailed spatial structures within a massive protostellar envelope, MMS 6.The observing data and detailed model comparisons clearly suggest that MMS 6 is one of the first cases of an intermediate-mass protostellar core at an extremely young stage.
Spatially Resolving Substructures within the Massive Protostellar Envelope in Orion
MMS 6-main, an extremely young intermediate-mass protostellar core, located in the Orion Molecular Cloud 3 region (OMC-3)
The Discovery of the Youngest Molecular Outflow Associated with an Intermediate-mass Protostellar Core in Orion
Takahashi, Satoko
Visiting Scholar (NAOJ)
photo of Takahashi, Satoko
Email: satoko.takahashi_replace2@_nao.ac.jp

Education and Positions

  • Assistant Professor at NAOJ (ALMA Chile Observatory) / CSV scientist at Joint ALMA Observatory (2013~present)
  • Support Scientist (ALMA-Taiwan Project) until 2013 April (2013)
  • Postdoctoral Fellow, Institute of Astronomy and Atrophysics, Academia Sinica (2007~2012)
  • PhD, Department of Astronomy, Graduate University for Advanced Studies, Japan (2004~2007)
  • Master of Astrophysics & Planetary Science, Ibaraki University, Japan (2002~2004)
  • Bachelor of physics, Tokyo University of Science, Japan (1998~2002)

Honors & Awards

  • 4/2005 - 03/2007, Research Fellow of Japan Society for the Promotion of Science (JSPS) for young scientist at Nobeyama Radio Observatory and National Astronomical Observatory of Japan. (2005~2007)

Research Interests

Fragmentation and star-formation, Pre-/Proto-stellar Cores, Circumstellar Disks, and Molecular Outflows, Formation & Evolution of Intermediate-mass Protostars, Milimeter/Submillimeter Interferometers

Journal Papers affiliated with ASIAA

  1. Hung T; Liu S-Y; Su Y-N; He JH; Lee H-T; Takahashi S; Chen HR, "A Mini Survey of Methyl Cyanide toward Extended Green Objects" , ApJ: 872(1), 61 (20 pp.), Feb, 2019 [SCI] ( ADS | Fulltext )
  2. Takahashi S; Machida MN; Tomisaka K; Ho PTP; et al., "ALMA High Angular Resolution Polarization Study: An Extremely Young Class 0 Source, OMC-3/MMS 6" , ApJ: 872(1), 70 (15 pp.), Feb, 2019 [SCI] ( ADS | Fulltext )
  3. 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 )
  4. Ge JX; He JH; Chen X; Takahashi S, "Early-stage star-forming cloud cores in Galactic Legacy Infrared Mid-Plane Survey (GLIMPSE) extended green objects (EGOs) as traced by organic species" , MNRAS: 445(2), 1170-1185, Dec, 2014 [SCI] ( ADS | Fulltext )
  5. Urata Y; Huang KY; Takahashi S; et al., "Synchrotron Self-inverse Compton Radiation from Reverse Shock on GRB 120326A" , ApJ: 789(2), 146, July, 2014 [SCI] ( ADS | Fulltext )
  6. de Gregorio-Monsalvo I.; ...; Takahashi S; Chapillon E; et al., "Unveiling the gas-and-dust disk structure in HD 163296 using ALMA observations" , A&A: 557, A133, Sept, 2013 [SCI] ( ADS | Fulltext )
  7. Klaassen PD; Juhasz A; Mathews GS; ...; Takahashi S; ...; Chapillon E; Espada D; et al., "ALMA detection of the rotating molecular disk wind from the young star HD 163296" , A&A: 555, A75, July, 2013 [SCI] ( ADS | Fulltext )
  8. Loinard L; Zapata LA; ....; Ho PTP; ...; Takahashi S; Trejo A, "ALMA and VLA observations of the outflows in IRAS 16293-2422" , MNRAS: 430(1), L10-L14, Mar, 2013 [SCI] ( ADS | Fulltext )
  9. Mathews GS; Klaassen PD; Juhasz A; Harsono, D; Chapillon E; ...; Takahashi S; et al., "ALMA imaging of the CO snowline of the HD 163296 disk with DCO+" , A&A: 557, A132, Sept, 2013 [SCI] ( ADS | Fulltext )
  10. Takahashi S; Ho PTP; Teixeira PA; Zapata LA; Su Y-N, "Hierarchical Fragmentation of the Orion Molecular Filaments" , ApJ: 763(1), 57, Jan 20, 2013 [SCI] ( ADS | Fulltext )
  11. Takahashi S; Ohashi N; Bourke LT, "Direct Imaging of a Compact Molecular Outflow from a Very Low Luminosity Object: L1521F-IRS" , ApJ: 774(1), 20, Sept 1, 2013 [SCI] ( ADS | Fulltext )
  12. Tsai A-L; Urata Y; Takahashi S; Chuang C-J, "Constrain the SED Type of Unidentified Fermi Objects" , JASS: 30, 123-125, Sept, 2013 ( ADS | Fulltext )
  13. Zapata LA; Loinard L; Rodriguez LF; ...; Takahashi S; Trejo A; et al., "ALMA 690 GHz Observations of IRAS 16293-2422B: Infall in a Highly Optically-Thick Disk" , ApJL: 764(1), L14, Feb 10, 2013 [SCI] ( ADS | Fulltext )
  14. Espada D; Komugi S; Muller E; ...; Matsushita S; Trejo A; Chapillon E; Takahashi S; Su YN; et al., "Giant Molecular Clouds and Star Formation in the Tidal Molecular Arm of NGC 4039" , ApJL: 760(2), L25, Dec 1, 2012 [SCI] ( ADS | Fulltext )
  15. He J-H; Takahashi S; Chen X, "A 1 mm spectral line survey toward GLIMPSE Extended Green Objects (EGOs)" , ApJS: 202(1), 1, 2012 [SCI] ( ADS | Fulltext )
  16. Naranjo-Romero R; Zapata LA; Vazquez-Semadeni E; Takahashi S; et al., "From dusty filaments to massive stars: The case of NGC 7538 S" , ApJ: 757(1), 58, Sept 20, 2012 [SCI] ( ADS | Fulltext )
  17. Takahashi S; Saigo K; Ho PTP; et al., "Spatially Resolving Substructures within the Massive Envelope around an Intermediate-mass Protostar: MMS 6/OMC-3" , ApJ: 752(1), 10, June 10, 2012 [SCI] ( ADS | Fulltext )
  18. Shimajiri Y; Takahashi S; Takakuwa S; et al., "Millimeter- and Submillimeter-Wave Observations of the OMC-2/3 region. IV; Interaction between the Outflow and the Dense Gas in the Cluster Forming Region of OMC-2 FIR 6" , PASJ: 61(5), 1055-1063, October 25, 2009 [SCI] ( ADS | Fulltext )
  19. Takahashi S; Ho PTP; Tang YW; Kawabe R; Saito M, "Evolutionary Status of Brightest and Youngest Source in the Orion Molecular Cloud-3 Region" , ApJ: 704(2), 1459-1470, Oct, 2009 [SCI] ( ADS | Fulltext )
  20. Furuya RS; Cesaroni R; Takahashi S; Codella C; Momose M; Beltran MT, "Candidate Rotating Toroids around High-Mass (Proto) Stars" , ApJ: 673(1), 363-381, Jan 20, 2008 [SCI] ( ADS | Fulltext )
  21. Shimajiri Y; Takahashi S; Takakuwa S; et al., "Millimeter- and Submillimeter- Wave Observations of the OMC-2/3 Region. II. Observational Evidence for Outflow Triggered Star Formation in the OMC-2 FIR3/4 Region" , ApJ: 683(1), 255-266, Aug 10, 2008 [SCI] ( ADS | Fulltext )
  22. Takahashi S; Saito M; Ohashi N; ...; Takakuwa S; et al., "Millimeter- and Submillimeter- Wave Observations of the OMC-2/3 Region. III. An Extensive Survey for Molecular Outflows" , ApJ: 688(1), 344-361, Nov 20, 2008 [SCI] ( ADS | Fulltext )
  23. Takahashi S; Saito M; Takakuwa S; Kawabe R, "A new evolutionary scenario of intermediate-mass star-formation revealed by multi-wavelength observations of OMC-2/3" , Ap&SS: 313(1-3), 165-168, Jan, 2008 [SCI] ( ADS | Fulltext )
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