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Gauging the Hidden Hot Nucleus of NGC 4418 with submillimeter Interferometry
The center of a nearby barred galaxy M83
Sakamoto, Kazushi
Associate Research Fellow (Tenured)
photo of Sakamoto, Kazushi
Office: ASMAB 1415
TEL: +886-2-2366-5472
FAX: +886-2-2367-7849
Email: ksakamoto_replace2@_asiaa.sinica.edu.tw

Education and Positions

  • Associate Research Fellow, ASIAA (2008~present)

Research Interests

My recent research is in the area of millimeter-submillimeter observations of such galaxies as mergers, barred spirals, and starburst galaxies for the purpose of understanding the structure, dynamics, and evolution of galaxies. The intersteller medium visible at millimeter-submillimeter wavelengths is the raw material for star formation, a tracer of galactic dynamics, and a driver of galaxy evolution through its motion within galaxies. Millimeter-submillimeter interforometry techniques are also in my research interests. My current research projects mainly use Submillimeter Array (SMA) and the Atacama Large Millimeter-submillimeter Array (ALMA).

Journal Papers affiliated with ASIAA

  1. Falstad N; Aalto S; König S; Onishi K; Muller S; Gorski M; Sato M; Stanley F; Combes F; González-Alfonso E; Mangum JG; Evans AS; Barcos-Muñoz L; Privon GC; Linden ST; Díaz-Santos T; Martín S; Sakamoto K; Harada N; Fuller GA; Gallagher JS; van der Werf PP; Viti S; Greve TR; García-Burillo S; Henkel C; Imanishi M; Izumi T; Nishimura Y; Ricci C; Mühle S, "CON-quest. Searching for the most obscured galaxy nuclei" , A&A: 649, id.A105 (16 pp), May, 2021 [SCI] ( ADS | Fulltext )
  2. Aalto S; Falstad N; Muller S; ..; Sakamoto K; et al., "ALMA resolves the remarkable molecular jet and rotating wind in the extremely radio-quiet galaxy NGC 1377" , A&A: 640, id.A104 (15pp.), Aug, 2020 [SCI] ( ADS | Fulltext )
  3. Boettcher E; Gallagher JS, Iii; Ohyama Y; ...; Sakamoto K; et al., "VV 655 and NGC 4418: Implications of an interaction for the evolution of a LIRG" , A&A: 637, id.A17 (9pp.), May, 2020 [SCI] ( ADS | Fulltext )
  4. Koda J; Sawada T; Sakamoto K; ...; Harada N; et al., "Systematic Variations of CO J = 2−1/1─0 Ratio and Their Implications in The Nearby Barred Spiral Galaxy M83" , ApJL: 890(1), L10 (7pp.), Feb, 2020 [SCI] ( ADS | Fulltext )
  5. Aalto S; Muller S; König S; ...; Sakamoto K; et al., "The hidden heart of the luminous infrared galaxy IC 860. I. A molecular inflow feeding opaque, extreme nuclear activity" , A&A: 627, id.A147 (13 pp.), Jul, 2019 [SCI] ( ADS | Fulltext )
  6. Combes F; Garcia-Burillo S; Audibert A; ...; Sakamoto K; et al., "ALMA observations of molecular tori around massive black holes" , A&A: 623, id. A79 (19 pp.), Mar, 2019 [SCI] ( ADS | Fulltext )
  7. Falstad N; Hallqvist F; Aalto S; ...; Sakamoto K; et al., "Hidden or missing outflows in highly obscured galaxy nuclei?" , A&A: 623, id. A29 (10 pp.), Feb, 2019 [SCI] ( ADS | Fulltext )
  8. González-Alfonso E; Sakamoto K, "The Greenhouse Effect in Buried Galactic Nuclei and the Resonant HCN Vibrational Emission" , ApJ: 882(2), id. 153 (23 pp.), Sep, 2019 [SCI] ( ADS | Fulltext )
  9. Harada N; Sakamoto K; Martín S; et al., "Chemical Evolution along the Circumnuclear Ring of M83" , ApJ: 884(2), id. 100 (20 pp.), Oct, 2019 [SCI] ( ADS | Fulltext )
  10. Martin S; Muller S; Henkel C; ...; Sakamoto K; et al., "Spatially resolved carbon and oxygen isotopic ratios in NGC 253 using optically thin tracers" , A&A: 624, id. A125 (19 pp.), Apr, 2019 [SCI] ( ADS | Fulltext )
  11. Ohyama Y; Sakamoto K; Aalto S; Gallagher JS III, "Dusty Superwind from a Galaxy with a Compact Obscured Nucleus: Optical Spectroscopic Study of NGC 4418" , ApJ: 871(2), id. 191 (26 pp.), Feb, 2019 [SCI] ( ADS | Fulltext )
  12. Barcos-Muñoz L; Aalto S; Thompson TA; Sakamoto K; et al., "Fast, Collimated Outflow in the Western Nucleus of Arp 220" , ApJL: 853(2), L28, Feb, 2018 [SCI] ( ADS | Fulltext )
  13. Falstad N; Aalto S; Mangum JG; ...; Sakamoto K; et al., "Hidden molecular outflow in the LIRG Zw 049.057" , A&A: 609, A75, Jan, 2018 [SCI] ( ADS | Fulltext )
  14. Harada N; Sakamoto K; Martin S; et al., "ALMA Astrochemical Observations of the Infrared-Luminous Merger NGC 3256" , ApJ: 855(1), id. 49 (21 pp.), March 1, 2018 [SCI] ( ADS | Fulltext )
  15. Aalto,S; Muller S; Costagliola F; Sakamoto K; et al., "Luminous, pc-scale CO 6-5 emission in the obscured nucleus of NGC 1377" , A&A: 608, A22, Dec, 2017 [SCI] ( ADS | Fulltext )
  16. König S; Martín S; Muller S; ...; Sakamoto K; et al., "Subarcsecond imaging of the water emission in Arp 220" , A&A: 602, A42, June, 2017 [SCI] ( ADS | Fulltext )
  17. Privon GC; Aalto S; Falstad N;...; Sakamoto K; et al., "The Dense Molecular Gas and Nuclear Activity in the ULIRG IRAS 13120–5453" , ApJ: 835(2), 213, Feb 1, 2017 [SCI] ( ADS | Fulltext )
  18. Sakamoto K; Aalto S; Barcos-Muñoz L; ...; Harada N; et al., "Resolved Structure of the Arp 220 Nuclei at λ ≈ 3 mm" , ApJ: 849(1), 14, Nov, 2017 [SCI] ( ADS | Fulltext )
  19. Wu Y-L; Sakamoto K; Pan H-A, "Submillimeter Array 12CO (2-1) Imaging of the NGC 6946 Giant Molecular Clouds" , ApJ: 839(1), 6, April 7, 2017 [SCI] ( ADS | Fulltext )
  20. Aalto S; Costagliola F; Muller S; Sakamoto K; et al., "A precessing molecular jet signaling an obscured, growing supermassive black hole in NGC 1377?" , A&A: 590, A73, May, 2016 [SCI] ( ADS | Fulltext )
  21. Krips M; Martín S; Peck AB; Sakamoto K; et al., "SMA Observations of the Extended 12CO(J = 6–5) Emission in the Starburst Galaxy NGC 253" , ApJ: 821(2), 112, April 20, 2016 [SCI] ( ADS | Fulltext )
  22. Krips M; Martin S; Sakamoto K; ... ; Matsushita S; et al., "ACA [CI] Observations of the Starburst Galaxy NGC 253" , A&A: 592, L3, July, 2016 [SCI] ( ADS | Fulltext )
  23. Martín S; Aalto S; Sakamoto K; ...; Harada N; et al., "The unbearable opaqueness of Arp220" , A&A: 590, A25, May, 2016 [SCI] ( ADS | Fulltext )
  24. Aalto S; Martín S; Costagliola F; ...; Sakamoto K; et al., "Probing highly obscured, self-absorbed galaxy nuclei with vibrationally excited HCN" , A&A: 584, 42, Dec, 2015 [SCI] ( ADS | Fulltext )
  25. Barcos-Muñoz L; Leroy AK; Evans AS; …; Sakamoto K; et al., "High-resolution Radio Continuum Measurements of the Nuclear Disks of Arp 220" , ApJ: 799(1), 10, Jan 20, 2015 [SCI] ( ADS | Fulltext )
  26. Costagliola F; Sakamoto K; Muller S; ...; Harada N; et al., "Exploring the molecular chemistry and excitation in obscured luminous infrared galaxies: An ALMA mm-wave spectral scan of NGC 4418" , A&A: 582, 91, Oct, 2015 [SCI] ( ADS | Fulltext )
  27. Ohyama Y; Terashima Y; Sakamoto K, "Infrared and X-Ray Evidence of an AGN in the NGC 3256 Southern Nucleus" , ApJ: 805(2), 162, June 1, 2015 [SCI] ( ADS | Fulltext )
  28. Sakamoto K; Aalto S; Combes F; Evans A; Peck A, "An Infrared-luminous Merger with Two Bipolar Molecular Outflows: ALMA and SMA Observations of NGC 3256" , ApJ: 797(2), 90, Dec, 2014 [SCI] ( ADS | Fulltext )
  29. Costagliola F; Aalto S; Sakamoto K; et al., "High-resolution mm and cm study of the obscured LIRG NGC 4418 . A compact obscured nucleus fed by in-falling gas?" , A&A: 556, A66, Aug, 2013 [SCI] ( ADS | Fulltext )
  30. Sakamoto K; Aaslto S; Costagliola F; ...; Ohyama Y; et al., "Submillimeter Interferometry of the Luminous Infrared Galaxy NGC 4418: A Hidden Hot Nucleus with an Inflow and an Outflow" , ApJ: 764(1), 42, Feb, 2013 [SCI] ( ADS | Fulltext )
  31. Aalto S; Muller S; Sakamoto K; et al., "Winds of change - a molecular outflow in NGC 1377? The anatomy of an extreme FIR-excess galaxy" , A&A: 546, A68, Oct, 2012 [SCI] ( ADS | Fulltext )
  32. Sakamoto K; Mao RQ; Matsushita S; et al., "Star-forming Cloud Complexes in the Central Molecular Zone of NGC 253" , ApJ: 735(1), 19, July, 2011 [SCI] ( ADS | Fulltext )
  33. Espada D; Peck A; Matsushita S; Sakamoto K; ...; Dinh-V-Trung, "Disentangling the Circumnuclear Environs of Centaurus A. II. On the Nature of the Broad Absorption Line" , ApJ: 720(1), 666-678, Sept 1, 2010 [SCI] ( ADS | Fulltext )
  34. Sakamoto K; Aalto S; Evans AS; Wiedner MC; Wilner DJ, "Vibrationally Excited HCN in the Luminous Infrared Galaxy NGC 4418" , ApJ: 725(2), L228-L233, Dec, 2010 [SCI] ( ADS | Fulltext )
  35. Aalto S; ...; Sakamoto K; et al., "High-resolution HNC 3-2 SMA observations of Arp220" , A&A: 493(2), 481-487, Jan, 2009 [SCI] ( ADS | Fulltext )
  36. Matsushita S; Iono D; Petitpas GR; ...; Chou RCY; ...; Lim J; Muller S; ...; Sakamoto K; Sawada-Satoh S; et al., "SMA CO(J=6-5) and 435 micron interferometric imaging of the nuclear region of Arp 220" , ApJ: 693(1), 56-68, Mar 1, 2009 [SCI] ( ADS | Fulltext )
  37. Sakamoto K; Aalto S; Wilner DJ; Black JH; et al., "P Cygni Profiles of Molecular Lines toward Arp 220 Nuclei" , ApJ: 700(2), L104-L108, Aug 1, 2009 [SCI] ( ADS | Fulltext )
  38. Sakamoto K; Wang JZ; Wiedner MC; ...; Ho PTP; et al., "Submillimeter Array Imaging of the CO(3-2) Line and 860 μm Continuum of Arp 220: Tracing the Spatial Distribution of Luminosity" , ApJ: 684(2), 957-977, Sept 10, 2008 [SCI] ( ADS | Fulltext )
TEL: 886-2-3365-2200 FAX: 886-2-2367-7849
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