カテゴリー別アーカイブ: 研究紹介

Control of the Vibration Isolation System for Main Mirrors in KAGRA / Build-up of the red sequence galaxies in clusters at z=0.6-1.3 from HSC-HSC / Direct Measurement of Coating Thermal Noise Using Cryogenic Optical Cavities

[Speaker1]
Koki Okutomi, SOKENDAI D3 (Supervisor; Yuichi Aso, Raffael Flaminio, Ryutaro Takahashi)
[Title]
Control of the Vibration Isolation System for Main Mirrors in KAGRA

[Speaker2]
Moegi Yamamoto, SOKENDAI D2 (Supervisor; Tadayuki Kodama)
[Title]
Build-up of the red sequence galaxies in clusters at z=0.6-1.3 from HSC-HSC

[Speaker3]
Satoshi Tanioka, SOKENDAI M2 (Supervisor; Yoichi Aso)
[Title]
Direct Measurement of Coating Thermal Noise Using Cryogenic Optical Cavities
[Abstract]
The optical coatings used in gravitational-wave detectors constitute the dominant source of thermal noise. This noise is called coating thermal noise. Coating thermal noise is one of the most important noise sources in gravitational-wave detectors at most sensitive frequency range. To reduce this noise, direct measurement is indispensable. So far, I have performed simulations and developed optical systems for direct measurement. I will report the current status.

Oscillation of Spicules Observed by Chromospheric Lyman-Alpha Spectro-Polarimeter (CLASP) / High resolution spectrometer with spatial resolving power

[Speaker1]
Masaki Yoshida, SOKENDAI D1 (Supervisor; Y. Suematsu, H. Hara, R. Ishikawa)
[Title]
Oscillation of Spicules Observed by Chromospheric Lyman-Alpha Spectro-Polarimeter (CLASP)

[Speaker2]
Ko Hosokawa, SOKENDAI M2 (Supervisor; Takayuki Kotani)
[Title]
High resolution spectrometer with spatial resolving power

Growth of Typical Supermassive Black Holes at z~6

[Speaker]
Masafusa Onoue, SOKENDAI D3 (Supervisor; Nobunari Kashikawa)
[Title]
Growth of Typical Supermassive Black Holes at z~6
[Abstract]
In this colloquium, I will describe recent observational and theoretical researchers on the early growth of supermassive black holes at high redshift. Then, I will show our recent works on the search of low-luminosity quasars at z>6 with the Subaru telescope and some preliminary results on their mass measurements with NIR spectroscopic follow-up observations.

3D Radiation-MHD Simulation of Clumpy Outflow from Supercritical Accretion Flow / Understanding the dynamics of jet/outflow driven by high-mass young stellar objects based on 22 GHz water maser survey using KaVA.

[Speaker1]
Hiroshi Kobayashi, SOKENDAI (Supervisor; Ken Ohsuga)
[Title]
3D Radiation-MHD Simulation of Clumpy Outflow from Supercritical Accretion Flow

[Speaker2]
Jungha Kim, SOKENDAI (Supervisor; Mareki Honma, Tomoya Hirota, Katsunori Shibata)
[Title]
Understanding the dynamics of jet/outflow driven by high-mass young stellar objects based on 22 GHz water maser survey using KaVA.