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. Bao M; Harada N; Kohno K; Yoshimura Y; Egusa F; Nishimura Y; Tanaka K; Nakanishi K; Martín S; Mangum JG; Sakamoto K; Muller S; Bouvier M; Colzi L; Emig KL; Meier DS; Henkel C; Humire P; Huang K-Y; Rivilla VM; Van Der Werf P; Viti S, "Physical Properties of the Southwest Outflow Streamer in the Starburst Galaxy NGC 253 with ALCHEMI" , A&A, 2024, Accepted [SCI] ( ADS | Fulltext )
2. Butterworth J; Viti S; Van Der Werf PP; Mangum JG; Martín S; Harada N; Emig KL; Muller S; Sakamoto K; Yoshimura Y; Tanaka K; Herrero-Illana R; Colzi L; Rivilla VM; Huang KY; Bouvier M; Behrens E; Henkel C; Yan YT; Meier DS; Zhou D, "Molecular isotopologue measurements toward super star clusters and the relation to their ages in NGC253 with ALCHEMI" , A&A, 2024, Accepted [SCI] ( ADS | Fulltext )
3. Harada N; Meier DS; Martín S; Muller S; Sakamoto K; Saito T; Gorski MD; Henkel C; Tanaka K; Mangum JG; Aalto S; Aladro R; Bouvier M; Colzi L; Emig KL; Herrero-Illana R; Huang K-Y; Kohno K; König S; Nakanishi K; Nishimura Y; Takano S; Rivilla VM; Viti S; Watanabe Y; Van Der Werf PP; Yoshimura Y, "The ALCHEMI atlas: principal component analysis reveals starburst evolution in NGC 253" , ApJS: 271(2), id.38 (50 pp), Apr, 2024 [SCI] ( ADS | Fulltext )
4. Tanaka K; Mangum JG; Viti S; Martin S; Harada N; Sakamoto K; Muller S; Yoshimura Y; Nakanishi K; Herrero Illana R; Emig KL; Muhle S; Kaneko H; Tosaki T; Behrens E; Rivilla VM; Colzi L; Nishimura Y; Humire PK; Bouvier M; Huang K-Y; Butterworth J; Meier DS; Van Der Werf PP, "Volume Density Structure of the Central Molecular Zone NGC 253 through ALCHEMI Excitation Analysis" , ApJ: 961(1), id.18 (41 pp), Jan, 2024 [SCI] ( ADS | Fulltext )
5. Huang KY; Viti S; Holdship J; Mangum JG; Martín S; Harada N; Muller S; Sakamoto K; Tanaka K; Yoshimura Y; Herrero-Illana R; Meier DS; Behrens E; Van Der Werf PP; Henkel C; García-Burillo S; Rivilla VM; Emig KL; Colzi L; Humire PK; Aladro R; Bouvier M, "Reconstructing the shock history in the CMZ of NGC 253 with ALCHEMI" , A&A: 675, id.A151 (32 pp), July, 2023 [SCI] ( ADS | Fulltext )
6. Koda J; Hirota A; Egusa F; Sakamoto K; Sawada T; Heyer M; Baba J; Boissier S; Calzetti D; Donovan Meyer J; Elmegreen BG; Gil De Paz A; Harada N; Ho LC; Kobayashi MIN; Kuno N; Lee AM; Madore BF; Maeda F; Martin S; Muraoka K; Nakanishi K; Onodera S; Pineda JL; Scoville N; Watanabe Y, "Diverse Molecular Structures Across The Whole Star-Forming Disk of M83: High fidelity Imaging at 40pc Resolution" , ApJ: 949(2), id.108 (25 pp), June, 2023 [SCI] ( ADS | Fulltext )
7. Ohyama Y; Onishi S; Nakagawa T; Matsumoto K; Isobe N; Shirahata M; Baba S; Sakamoto K, "Warm Molecular Gas in the Central Parsecs of the Buried Nucleus of NGC 4418 Traced with the Fundamental CO Rovibrational Absorptions" , ApJ: 951(2), id.87 (12 pp), July, 2023 [SCI] ( ADS | Fulltext )
8. Behrens E; Mangum JG; Holdship J; Viti S; Harada N; Martín S; Sakamoto K; Muller S; Tanaka K; Nakanishi K; Herrero-Illana R; Yoshimura Y; Aladro R; Colzi L; Emig KL; Henkel C; Huang K-Y; Humire PK; Meier DS; Rivilla VM; Van Der Werf PP; Alma Comprehensive High-Resolution Extragalactic Molecular Inventory (Alchemi) Collaboration, "Tracing Interstellar Heating: An ALCHEMI Measurement of the HCN Isomers in NGC 253" , ApJ: 939(2), id.119 (26pp), Nov, 2022 [SCI] ( ADS | Fulltext )
9. Haasler D; Rivilla VM; Martín S; Holdship J; Viti S; Harada N; Mangum J; Sakamoto K; Muller S; Tanaka K; Yoshimura Y; Nakanishi K; Colzi L; Hunt L; Emig KL; Aladro R; Humire P; Henkel C; Van Der Werf P, "First extragalactic detection of a phosphorus-bearing molecule with ALCHEMI: Phosphorus nitride (PN)" , A&A: 659, id.A158 (14pp), Mar, 2022 [SCI] ( ADS | Fulltext )
10. Harada N; Martín S; Mangum JG; Sakamoto K; Muller S; Rivilla VM; Henkel C; Meier DS; Colzi L; Yamagishi M; Tanaka K; Nakanishi K; Herrero-Illana R; Yoshimura Y; Humire PK; Aladro R; Van Der Werf PP; Emig KL, "ALCHEMI Finds a "Shocking" Carbon Footprint in the Starburst Galaxy NGC 253" , ApJ: 938(1), id.80 (15pp), Oct, 2022 [SCI] ( ADS | Fulltext )
11. Holdship J; Mangum JG; Viti S; Behrens E; Harada N; Martín S; Sakamoto K; Muller S; Tanaka K; Nakanishi K; Herrero-Illana R; Yoshimura Y; Aladro R; Colzi L; Emig KL; Henkel C; Nishimura Y; Rivilla VM; Van Der Werf PP, "Energizing Star Formation: The Cosmic-Ray Ionization Rate in NGC 253 Derived from ALCHEMI Measurements of H3O+ and SO" , ApJ: 931(2), id.89 (20pp), June, 2022 [SCI] ( ADS | Fulltext )
12. Humire PK; Henkel C; Hernández-Gómez A; Martín S; Mangum J; Harada N; Muller S; Sakamoto K; Tanaka K; Yoshimura Y; Nakanishi K; Mühle S; Herrero-Illana R; Meier DS; Caux E; Aladro R; Mauersberger R; Viti S; Colzi L; Rivilla VM; Gorski M; Menten KM; Huang KY; Aalto S; Van Der Werf PP; Emig KL, "Methanol masers in NGC 253 with ALCHEMI" , A&A: 633, id.A33 (28pp), July, 2022 [SCI] ( ADS | Fulltext )
13. Barrientos A; Holdship J; Solar M; Martín S; Rivilla VM; Viti S; Mangum J; Harada N; Sakamoto K; Muller S; Tanaka K; Yoshimura Y; Nakanishi K; Herrero-Illana R; Mühle S; Aladro R; Aalto S; Henkel C & Humire P, "Towards the prediction of molecular parameters from astronomical emission lines using Neural Networks" , Experimental Astronomy: 51(1-2), 157-182, Oct, 2021 [SCI] ( ADS | Fulltext )
14. 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 )
15. Harada N; Martín S; Mangum JG; Sakamoto K; Muller S; Tanaka K; Nakanishi K; Herrero-Illana R; Yoshimura Y; Mühle S; Aladro R; Colzi L; Rivilla VM; Aalto S; Behrens E; Henkel C; Holdship J; Humire PK; Meier DS; Nishimura Y; Van Der Werf PP; Viti S, "Starburst Energy Feedback Seen through HCO+/HOC+ Emission in NGC 253 from ALCHEMI" , ApJ: 923(1), id.24 (40pp), Dec, 2021 [SCI] ( ADS | Fulltext )
16. Holdship J; Viti S; Martín S; Harada N; Mangum J; Sakamoto K; Muller S; Tanaka K; Yoshimura Y; Nakanishi K; Herrero-Illana R; Mühle S; Aladro R; Colzi L; Emig KL; García-Burillo S; Henkel C; Humire P; Meier DS; Rivilla VM; Van Der Werf P, "The distribution and origin of C2H in NGC 253 from ALCHEMI" , A&A: 654, id.A55 (18pp), Oct, 2021 [SCI] ( ADS | Fulltext )
17. Martín S; Mangum JG; Harada N; Costagliola F; Sakamoto K; Muller S; Aladro R; Tanaka K; Yoshimura Y; Nakanishi K; Herrero-Illana R; Mühle S; Aalto S; Behrens E; Colzi L; Emig KL; Fuller GA; García-Burillo S; Greve TR; Henkel C; Holdship J; Humire P; Hunt L; Izumi T; Kohno K; König S; Meier DS; Nakajima T; Nishimura Y; Padovani M; Rivilla VM; Takano S; Van Der Werf PP; Viti S; Yan YT, "ALCHEMI, an ALMA Comprehensive High-resolution Extragalactic Molecular Inventory. Survey presentation and first results from the ACA array" , A&A: 656, id.A46 (62pp), Dec, 2021 [SCI] ( ADS | Fulltext )
18. Sakamoto K; Gonzalez-Alfonso E; Martin S; Wilner DJ; Aalto S; Evans AS; Harada N, "Deeply Buried Nuclei in the Infrared-luminous Galaxies NGC 4418 and Arp 220. I. ALMA Observations at λ = 1.4-0.4 mm and Continuum Analysis" , ApJ: 923(2), id.206 (36pp), Dec, 2021 [SCI] ( ADS | Fulltext )
19. Sakamoto K; Martin S; Wilner DJ; Aalto S; Evans AS; Harada N, "Deeply Buried Nuclei in the Infrared-luminous Galaxies NGC 4418 and Arp 220. II. Line Forests at λ = 1.4-0.4 mm and Circumnuclear Gas Observed with ALMA" , ApJ: 923(2), id.240 (41 pp), Dec, 2021 [SCI] ( ADS | Fulltext )
20. 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 )
21. 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 )
22. 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 )
23. 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 )
24. 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 )
25. 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 )
26. 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 )
27. 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 )
28. 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 )
29. 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 )
30. 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 )
31. 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 )
32. 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 )
33. 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 )
34. 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 )
35. 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 )
36. 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 )
37. 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 )
38. 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 )
39. 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 )
40. 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 )
41. Martín S; Aalto S; Sakamoto K; ...; Harada N; et al., "The unbearable opaqueness of Arp220" , A&A: 590, A25, May, 2016 [SCI] ( ADS | Fulltext )
42. 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 )
43. 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 )
44. 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 )
45. 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 )
46. 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 )
47. 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 )
48. 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 )
49. 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 )
50. 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 )
51. 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 )
52. 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 )
53. 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 )
54. 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 )
55. 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 )
56. 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 )