- 2005 - present: Suzaku Guest Observer Facilities
- 2004 - 2014: NASA/GSFC Astrobiology Project, Co-investigator
- 2008 - present: Research Scientist, UMBC/NASA
- 2005 - 2008: Research Scientist, USRA/NASA
- 2002 - 2005: NRC Research Fellow (NASA/GSFC)
- 2001 - 2002: Post-doctoral Fellow of NASDA (currently JAXA, Japan Aerospace Exploration Agency)
Member - American Astronomical Society (AAS)
- International Astronomical Union (IAU)
- Astronomical Society of Japan (ASJ)
Kenji Hamaguchi
(RESEARCHER)
| Email: | kenji.hamaguchi-1@nasa.gov |
| Phone: | 301.286.4970 |
| Org Code: | 662 |
| Address: |
NASA/GSFC Mail Code 662 Greenbelt, MD 20771 |
| Employer: | UMBC Univ. of MD, Baltimore County |
Brief Bio
Research Interests
Overview
Astrophysics: X-ray AstrophysicsI have studied stellar X-ray physics for 20 years using astronomical data obtained with the X-ray satellites, ROSAT, ASCA, Chandra, XMM-Newton, Swift, NuSTAR and Suzaku. My research interest is mass accretion mechanism, formation of newborn stars, evolution of massive stars, and history of star formation in star forming regions. I also developed X-ray CCD detectors and their calibration systems for the Astro-E1 X-ray satellite. I am currently working at the Goddard Center for the Suzaku X-ray observatory.
Publications
Refereed
2017. "The 2014 X-Ray Minimum of η Carinae as Seen by Swift." The Astrophysical Journal 838 (1): 45 [10.3847/1538-4357/aa6347] [Journal Article/Letter]
2016. "Discovery of Rapidly Moving Partial X-ray Absorbers within Gamma Cassiopeiae." The Astrophysical Journal 832 (2): 140 [10.3847/0004-637x/832/2/140] [Journal Article/Letter]
2016. "To v_∞ and beyond! The He I absorption variability across the 2014.6 periastron passage of η Carinae." Monthly Notices of the Royal Astronomical Society 461 (3): 2540-2558 [10.1093/mnras/stw1415] [Journal Article/Letter]
2016. "Modelling the Central Constant Emission X-ray component of η Carinae." Monthly Notices of the Royal Astronomical Society 458 (3): 2275-2287 [10.1093/mnras/stw339] [Journal Article/Letter]
2016. "He II λ4686 Emission from the Massive Binary System in η Car: Constraints to the Orbital Elements and the Nature of the Periodic Minima." The Astrophysical Journal 819 (2): 131 [10.3847/0004-637X/819/2/131] [Journal Article/Letter]
2016. "He II $lambda$4686 Emission from the Massive Binary System in $eta$ Car: Constraints to the Orbital Elements and the Nature of the Periodic Minima." The Astrophysical Journal 819 (2): 131 [10.3847/0004-637X/819/2/131] [Journal Article/Letter]
2016. "Eta Carinae's Thermal X-Ray Tail Measured with XMM-Newton and NuSTAR." The Astrophysical Journal 817 (1): 23 [10.3847/0004-637x/817/1/23] [Journal Article/Letter]
2015. "A Coordinated X-Ray and Optical Campaign of the Nearest Massive Eclipsing Binary, δ Orionis Aa. III. Analysis of Optical Photometric (Most) and Spectroscopic (Ground-Based) Variations." The Astrophysical Journal 809 (2): 134 [10.1088/0004-637x/809/2/134] [Journal Article/Letter]
2015. "A Coordinated X-Ray and Optical Campaign of the Nearest Massive Eclipsing Binary, δ Orionis Aa. II. X-Ray Variability." The Astrophysical Journal 809 (2): 133 [10.1088/0004-637x/809/2/133] [Journal Article/Letter]
2015. "A COORDINATED X-RAY AND OPTICAL CAMPAIGN OF THE NEAREST MASSIVE ECLIPSING BINARY, δ ORIONIS Aa. I. OVERVIEW OF THE X-RAY SPECTRUM ." The Astrophysical Journal 809 (2): 132 [10.1088/0004-637x/809/2/132] [Journal Article/Letter]