研究紹介」カテゴリーアーカイブ

Rapid dust production in Hα-8μm-selected galaxies at z=2 / Addressing the Evolution of Super-massive Blackholes with Hyper Suprime-Cam Survey

[Speaker 1]
Rhythm Shimakawa , D2, SOKENDAI, Mitaka(supervisor: Tadayuki Kodama)
[Title]
Rapid dust production in Hα-8μm-selected galaxies at z=2
[Abstract]
I present results on the dust obscuration of star-burst galaxies at z=2 selected by MIPS/Spitzer and MOIRCS/Subaru, towards on-going programs with ALMA. Thanks to our past narrow-band imaging survey (Mahalo-Subaru), we have a large sample of Hα-selected star-forming galaxies. By combining them with MIPS 24um data, we probed ~50 dusty galaxies with IR luminosities above 5E11 Lsun. Since those also have spatially-resolved rest-UV image taken by Hubble Space Telescope, we can study morphological dependence of dust properties (IRX=IR/UV). Our preliminary results show that for a given UV slope, “UV-saturated” galaxies have more heavily-obscured UV structures, which directly indicates that dust covering fraction increase rapidly than intrinsic UV luminosity as suggested by Reddy et al. 2010. Moreover, such highly-obscured galaxies tend to have high equivalent widths of Hα emission, which is also good agreement with dust properties of massive galaxies at low redshift (Koyama et al. 2015).

[Speaker 2]
Masafusa Onoue, D1, SOKENDAI, Mitaka(supervisor: Nobunari Kashikawa)
[Title]
Addressing the Evolution of Super-massive Blackholes with Hyper Suprime-Cam Survey

Chemical Network Simulations for Glycine Precursors / Observational study of the evolution of M BH / M spheroid ratios probed by z~3.3 QSOs

[Speaker 1]
Taiki Suzuki, D2, SOKENDAI, Mitaka(supervisor: Ohishi Maharishi)
[Title]
Chemical Network Simulations for Glycine Precursors

[Speaker 2]
Yuriko SAITO, D3, SOKENDAI, Mitaka(supervisor: Masatoshi Imanishi)
[Title]
Observational study of the evolution of M BH / M spheroid ratios probed by z~3.3 QSOs

What is the physical state of interstellar medium in high redshift galaxies? / The Extremely Wide-Field gzK Galaxy Survey / Speckle Nulling using SCExAO

[Speaker 1]
Rhythm Shimakawa ,D1, SOKENDAI, Mitaka(supervisor: Tadayuki Kodama)
[Title]
What is the physical state of interstellar medium in high redshift galaxies?
[Abstract]
I would like to review one of the most controversial issues in galaxy science, that is physical conditions of interstellar medium (ISM) in high redshift galaxies.
Many works seeking physical properties of star-forming galaxies at high redshifts have been published in recent years, and these are strongly suggesting that ISM conditions at high redshifts are different from those in the local Universe. This review will show
recent highlights of such kind of studies including our submitted letter (Shimakawa et al. arXiv:1411.1408).

[Speaker 2]
Shogo Ishikawa, D1, SOKENDAI, Mitaka(supervisor: Nobunari Kashikawa)
[Title]
The Extremely Wide-Field gzK Galaxy Survey

[Speaker 3]
Prashant Pathak, D1, SOKENDAI, Mitaka(supervisor: Dr. Hideki Takami’)
[Title]
Speckle Nulling using SCExAO

Designing a Central Flatfield Lamp for HSC / Constructing statistical sample of star-forming galaxies in “cosmic noon”

[Speaker1]
Junya Sakurai, D1, SOKENDAI, Mitaka(supervisor: Satoshi Miyazaki)
[Title]
Designing a Central Flatfield Lamp for HSC

[Speaker2]
Moegi Yamamoto, M1, SOKENDAI, Mitaka(supervisor: Tadayuki Kodama)
[Title]
Constructing statistical sample of star-forming galaxies in “cosmic noon”