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NGC3801: AGN-feedback caught in the act.
Discovery of a spiral-host episodic radio galaxy
Oyama, Yoichi
Senior Research Scientist
photo of Oyama, Yoichi
Office: ASMAB 1316
TEL: +886-2-2366-5442
FAX: +886-2-2367-7849
Email: ohyama_replace2@_asiaa.sinica.edu.tw

Education and Positions

  • Senior Research Scientist at ASIAA (2016~present)
  • Associate Research Scientist at ASIAA (2009~2016)
  • Visiting Scholar at ASIAA (2008~2009)
  • Aerospace Project Research Associate (AKARI) at ISAS/JAXA (2005~2008)
  • PhD fellow at ISAS/JAXA (2005)
  • Support Astronomer (FOCAS) of Subaru Telescope (RCUH/NAOJ) (2000~2004)
  • PhD fellow at Opt/IR division of NAOJ (1999~2000)
  • Research Fellow (DC1) of the Japan Society for the Promotion of Science (JSPS) (1996~1999)
  • PhD course student at Institute of Astronomy, Faculty of Science, Tohoku University (1996~1999)
  • Receive PhD at Institute of Astronomy, Faculty of Science, Tohoku University (1999)

Research Interests

Optical/Infrared Spectroscopic Studies of Star-forming Galaxies, (U)LIRGs, and high-z AGNs (quasars)

Recent Journal Papers

  1. Yoshiki Toba, Tohru Nagao, Wei-Hao Wang, Hideo Matsuhara, Masayuki Akiyama, Tomotsugu Goto, Yusei Koyama, (Youich Ohyama), Issei Yamamura, "Far-infrared Properties of Infrared-bright Dust-obscured Galaxies Selected with IRAS and AKARI Far-infrared All-sky Survey" , ASTROPHYSICAL JOURNAL: 840, 21, 2017-05 [SCI] (Fulltext)
  2. Ji-Jia Tang, Tomotsugu Goto, (Youichi Ohyama), Wen-Ping Chen, Fabian Walter, Bram Venemans, Kenneth C. Chambers, Eduardo Banados, Roberto Decarli, Xiaohui Fan, Emanuele Farina, Chiara Mazzucchelli, Nick Kaiser, Eugene A. Magnier, PS1 collaboration, "A Quasar Discovered at redshift 6.6 from Pan-STARRS1" , MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY: 466, 4568, 2017-04 [SCI] (Fulltext)
  3. Im M; Jun H; Kim D; ...; (Ohyama Y); et al.,, "AKARI Spectroscopy of Quasars at 2.5 - 5 μm" , Publications of The Korean Astronomical Society: 32, 21, 2017-03 (Fulltext)
  4. Goto T; Toba Y; Utsumi Y; ...; (Ohayma Y); et al., "Hyper Suprime-Camera Survey of the Akari NEP Wide Field" , Publications of The Korean Astronomical Society: 32(1), 225-230, 2017-03 (Fulltext)
  5. Yoshiki Toba*, Shinki Oyabu, Hideo Matsuhara, Daisuke Ishihara, Matt A. Malkan, Takehiko Wada, (Youichi Ohyama), Hirokazu Kataza, Satoshi Takita, Chisato Yamauch, "Luminosity Dependence of the Covering Factor of the Dust Torus in Active Galactic Nuclei Revealed by Akari" , Publications of The Korean Astronomical Society: 32 (1), 193-195, 2017-03 (Fulltext)
  6. (Ohyama Youichi)*, Matsushita Satoki, Oi Nagisa, Sun Ai-Lei, "Ground-based Mid-infrared Study of the Compton-thick AGN in M51 at 10-100 pc Scale" , ASTROPHYSICAL JOURNAL: 835, 169, 2017-02 [SCI] (Fulltext)
  7. Tamura, N., ..., (Ohyama, Y.), et al., "Prime Focus Spectrograph (PFS) for the Subaru Telescope: Overview, recent progress, and future perspectives" , Proceedings of SPIE 9908: 9908, 1, 2016-08 (Fulltext)
  8. Baba S, Nakagawa T, Shirahata M, ... (Ohyama Y), et al., "Revised wavelength and spectral response calibrations for AKARI near-infrared grism spectroscopy: Cryogenic phase" , PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN: 68 (2), 27, 2016-04 [SCI] (Fulltext)
  9. Yoshida M., Yagi M., (Ohyama Y.), et al., "Giant Hα Nebula Surrounding the Starburst Merger NGC 6240" , ASTROPHYSICAL JOURNAL: 820, 48, 2016-03 [SCI] (Fulltext)
  10. Alice P.-Y. Yu, Jeremy Lim, (Youichi Ohyama), Jeffrey C.-C. Chan, and T. Broadhurst, "The High-velocity System: Infall of a Giant Low-surface-brightness Galaxy toward the Center of the Perseus Cluster" , ASTROPHYSICAL JOURNAL: 814, 101, 2015-11 [SCI] (Fulltext)
  11. A. Solarz, A. Pollo, T. T. Takeuchi, K. Małek, H. Matsuhara, G. J. White, A. Pȩpiak, T. Goto, T. Wada, S. Oyabu, T. Takagi, Y. Ohyama*, C. P. Pearson, H. Hanami, T. Ishigaki and M. Malkan, "Clustering of the AKARI NEP deep field 24 μm selected galaxies" , ASTRONOMY & ASTROPHYSICS: 582, A58, 2015-10 [SCI] (Fulltext)
  12. Goto, T., Oi, N., Ohyama, Y.*, et al., "Evolution of mid-infrared galaxy luminosity functions from the entire AKARI NEP deep field with new CFHT photometry" , Monthly Notices of the Royal Astronomical Society: vol 452, p 1684, 2015-09 [SCI] (Fulltext)
  13. Sugai, H., ..., Ohyama, Y.*, et al., "Prime Focus Spectrograph for the Subaru telescope: massively multiplexed optical and near-infrared fiber spectrograph" , Journal of Astronomical Telescopes, Instruments, and Systems: 1 (3), 035001, 2015-07 (Fulltext)
  14. (Ohyama Youichi)*, Terashima Yuichi, Sakamoto Kazushi, "Infrared and X-Ray Evidence of an AGN in the NGC 3256 Southern Nucleus" , ASTROPHYSICAL JOURNAL: 805, 162, 2015-06 [SCI] (Fulltext)
  15. Jun Hyunsung David, Im Myungshin, Lee Hyung Mok, [Ohyama Youichi], Woo Jong-Hak, Fan Xiaohui, Goto Tomotsugu, Kim Dohyeong, Kim Ji Hoon, Kim Minjin Lee, Myung Gyoon, Nakagawa Takao, Pearson Chris, Serjeant Stephen, "Rest-frame Optical Spectra and Black Hole Masses of 3, ASTROPHYSICAL JOURNAL: 806, 109, 2015-06 [SCI] (Fulltext)
  16. Buat V., Oi N., Heinis S., Ciesla L., Burgarella D., Matsuhara H., Malek K., Goto T., Malkan M., Marchetti L., [Ohyama Y.], Pearson C., Serjeant S., "Dust attenuation up to z~2 in the AKARI North Ecliptic Pole Deep Field" , ASTRONOMY & ASTROPHYSICS: vol 577 p 141, 2015-05 [SCI] (Fulltext)
  17. Kataza Hirokazu, Sakon Itsuki, Wada Takehiko, Sarugaku Yuki, Fujishiro Naofumi, Ikeda Yuji, Mitani Shinji, [Ohyama Youichi], Kobayashi Naoto, "Performance Estimation of the Mid-Infrared Camera and Spectrometer Aboard SPICA" , Journal of Astronomical Instrumentation: Volume 4, id. 1550001, 2015-03 (Fulltext)
  18. Kim Dohyeong, Im Myungshin, Kim Ji Hoon, Jun Hyunsung David, Woo Jong-Hak, Lee Hyung Mok, Lee Myung Gyoon, Nakagawa Takao, Matsuhara Hideo, Wada Takehiko, Oyabu Shinki, Takagi Toshinobu, [Ohyama Youichi], Lee Seong-Kook, "The AKARI 2.5-5.0 mum Spectral Atlas of Type-1 Active Galactic Nuclei: Black Hole Mass Estimator, Line Ratio, and Hot Dust Temperature" , ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES: 216, 17, 2015-01 [SCI] (Fulltext)
  19. Pearson CP; Serjeant S; Oyabu S; ...; Ohyama Y; et al., "The first source counts at 18 μm from the AKARI NEP Survey" , MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY: 444(1), 846-859, 2014-10 [SCI] (Fulltext)
  20. David LP; Lim J; Forman W; ...; Ohyama Y; ...; Trung D-V, "Molecular Gas in the X-Ray Bright Group NGC 5044 as Revealed by ALMA" , ASTROPHYSICAL JOURNAL: 792(2), 94, 2014-09 [SCI] (Fulltext)
  21. Toba Y; Oyabu S; Matsuhara H; ...; Ohyama Y; et al, "Luminosity and Redshift Dependence of the Covering Factor of Active Galactic Nuclei viewed with WISE and Sloan Digital Sky Survey" , ASTROPHYSICAL JOURNAL: 788(1), 45, 2014-06 [SCI] (Fulltext)
  22. Oi N; Matsuhara H; Murata K; ...; Ohyama Y; et al., "Optical - near-infrared catalog for the AKARI north ecliptic pole Deep field" , ASTRONOMY & ASTROPHYSICS: 566, A60, 2014-06 [SCI] (Fulltext)
  23. Karouzos M; Im M; Trichas M; ...; Ohyama Y, "A Tale of Two Feedbacks: Star Formation in the Host Galaxies of Radio AGNs" , ASTROPHYSICAL JOURNAL: 784(2), 137, 2014-04 [SCI] (Fulltext)
  24. Murata K., Matsuhara H., Wada T., Arimatsu K., Oi N., Takagi T., Oyabu S., Goto T., (Ohyama Y.), Malkan M., Pearson C., Małek K., Solarz A., "AKARI North Ecliptic Pole Deep Survey. Revision of the catalogue via a new image analysis" , ASTRONOMY & ASTROPHYSICS: 559, 132-46, 2013-11 [SCI] (Fulltext)
  25. Toba Yoshiki, Oyabu Shinki, Matsuhara Hideo, Malkan Matthew A., Ishihara Daisuke, Wada Takehiko, (Ohyama Youichi), Takita Satoshi, Yamauchi Chisato, "The 9 and 18 Micrometer Luminosity Functions of Various Types of Galaxies with AKARI: Implication for the Dust Torus Structure of AGN" , PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN: 65, 113-133, 2013-10 [SCI] (Fulltext)
  27. Youichi Ohyama, Ananda Hota, "Discovery of a possibly-single blue supergiant star in the intra-cluster region of Virgo cluster of galaxies" , ASTROPHYSICAL JOURNAL LETTERS: 767, 29, 2013-04 [SCI] (Fulltext)
  28. Sakamoto Kazushi, Aalto Susanne, Costagliola Francesco, Martín Sergio, (Ohyama Youichi), Wiedner Martina C., Wilner David J., "Submillimeter Interferometry of the Luminous Infrared Galaxy NGC 4418: A Hidden Hot Nucleus with an Inflow and an Outflow" , ASTROPHYSICAL JOURNAL: 764, 42, 2013-02 [SCI] (Fulltext)
  29. Hanami Hitoshi, Ishigaki Tsuyoshi, Fujishiro Naofumi, Nakanishi Kouichiro, Miyaji Takamitsu, Krumpe Mirko, Umetsu Keiichi, Ohyama Youichi*, et al., "Star Formation and AGN activity in Galaxies classified using the 1.6 {\mu}m Bump and PAH features at $z = 0.4-2$" , PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN: 64, 70-109, 2012-08 [SCI] (Fulltext)
  30. Taniguchi Y., Matsubayashi K., Kajisawa M., Shioya Y., (Ohyama Y.), Nagao T., Ideue Y., Murayama T., Koda J., "Post-starburst Tidal Tails in the Archetypical Ultra Luminous Infrared Galaxy Arp 220" , ASTROPHYSICAL JOURNAL: 753, 78, 2012-07 [SCI] (Fulltext)
  31. Lim Jeremy, Ohyama Youichi*, Chi-Hung Yan, Dinh-V-Trung, Shiang-Yu Wang, "A Molecular Hydrogen Nebula in the Central cD Galaxy of the Perseus Cluster" , ASTROPHYSICAL JOURNAL: Volume 744, p 112, 2012-01 [SCI] (Fulltext)
  32. Takagi T., Matsuhara H., Goto T., Hanami H., Im M., Imai K., Ishigaki T., Lee H. M., Lee M. G., Malkan M., Ohyama Y.*, Oyabu S., Pearson C. P., Serjeant S., Wada T., White G. J., "The AKARI NEP-Deep survey: a mid-infrared source catalogue" , ASTRONOMY & ASTROPHYSICS: Volume 537, A24, 2012-01 [SCI] (Fulltext)
  33. Hota Ananda, Sirothia S. K., Ohyama Youichi*, Konar C., Kim Suk, Rey Soo-Chang, Saikia D. J., Croston J. H., Matsushita Satoki, "Discovery of a spiral-host episodic radio galaxy" , MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY: Volume 417, pp. L36-L40, 2011-10 [SCI] (Fulltext)
  34. Oyabu S., Ishihara D., Malkan M., Matsuhara H., Wada T., Nakagawa T., Ohyama Y.*, Toba Y., Onaka T., Takita S., Kataza H., Yamamura I., Shirahata M., "AKARI detections of hot dust in luminous infrared galaxies. Search for dusty active galactic nuclei" , ASTRONOMY & ASTROPHYSICS: Volume 529, A122, 2011-05 [SCI] (Fulltext)
  35. Yoshida Michitoshi, Kawabata Koji S., Ohyama, Youichi*, "Spectropolarimetry of the superwind filaments of the starburst galaxy M82: kinematics of dust outflow" , PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN: Volume 63, pp. S493-S503, 2011-03 [SCI] (Fulltext)
  36. Imanishi M; Nakagawa T; Shirahata M; Ohyama Y; Onaka T , "AKARI IRC Infrared 2.5-5 μm Spectroscopy of a Large Sample of Luminous Infrared Galaxies " , ASTROPHYSICAL JOURNAL: 721(1), 1233-1261, 2010-10 [SCI] (Fulltext)
  37. Ootsubo T; Usui F; Kawakita H; Ishiguro M; Furusho R; Hasegawa S; Ueno M; Watanabe J; Sekiguchi T; Wada T; Ohyama Y; Oyabu S; Matsuhara H; Onaka T; Nakagawa T; Murakami H, "Detection of Parent H2O and CO2 Molecules in the 2.5–5 μm Spectrum of Comet C/2007 N3 (Lulin) Observed with AKARI" , ASTROPHYSICAL JOURNAL: 717(1), L66-L70, 2010-07 [SCI] (Fulltext)
  38. Goto T; Koyama Y; Wada T; Pearson C; Matsuhara H; Takagi T; Shim H; Im M; Lee MG; Inami H; Malkan M; Okamura S; Takeuchi TT; Serjeant S; Kodama T; Nakagawa T; Oyabu S; Ohyama Y; Lee HM; Hwang N; Hanami H; Imai K; Ishigaki T, "Environmental dependence of 8 μm luminosity functions of galaxies at z ~ 0.8. Comparison between RXJ1716.4+6708 and the AKARI NEP-deep field" , Astronomy & Astrophysics: 514, id.A7, 2010-05 [SCI] (Fulltext)
  39. T. Goto, T. Takagi, ..., Y. Ohyama, ..., "Evolution of infrared luminosity functions of galaxies in the AKARI NEP-Deep field. Revealing the cosmic star formation history hidden by dust" , ASTRONOMY & ASTROPHYSICS: 514, id.A6, 2010-05 [SCI] (Fulltext)
  40. Kaneda H; Ishihara D; Suzuki T; Ikeda N; Onaka T; Yamagishi M; Ohyama Y; Wada T; Yasuda A , "Large-scale distributions of mid- and far-infrared emission from the center to the halo of M 82 revealed with AKARI" , Astronomy & Astrophysics: 514, id. A14, 2010-05 [SCI] (Fulltext)
  41. Takagi T; Ohyama Y*; et al. , "Polycyclic aromatic hydrocarbon (PAH) luminous galaxies at z~1 " , Astronomy & Astrophysics: 514, id.A5, 2010-05 [SCI] (Fulltext)
  42. Pearson C P; Oyabu S; Wada T; Matsuhara H; Lee HM; Kim SJ; Takagi T; Goto T; Im MS; Serjeant S; Lee MG; Ko JW; White GJ; Ohyama Y, "Source counts at 15 microns from the AKARI NEP survey" , Astronomy & Astrophysics: 514, id. A8, 2010-05 [SCI] (Fulltext)
  43. D. Ishihara, T. Onaka, ... Y. Ohyama, ..., "The AKARI/IRC Mid-Infrared All-Sky Survey" , ASTRONOMY & ASTROPHYSICS: 514, id. A1, 2010-05 [SCI] (Fulltext)
  44. Oyabu S; Kawara K; Tsuzuki Y; ...; Ohyama Y, "Akari Near- and Mid-Infrared Spectroscopy of Apm 08279+5255 At Z=3.91" , ASTROPHYSICAL JOURNAL: 697(1), 452-457, 2009-05 [SCI] (Fulltext)
  45. Goto T; Hanami H; Im M; ...; Ohyama Y; et al., "Galaxy Clusters at 0.9 < z < 1.7 in the AKARI NEP Deep Field" , PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN: 60(SP2), S531-S542, 2008 [SCI] (Fulltext)
TEL: 886-2-3365-2200 FAX: 886-2-2367-7849
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