Komaba Seminar

15:00, Jan. 18, 2023

Guest seminar

• Dr. Kai Ikuta "データ科学による恒星磁気活動の探査"

15:00, Jan. 18, 2023

Regular seminar

• Masamitsu Mori "Collapse of white dwarfs with super Chandrasekhar"

Journal Club

• Akatsuka "MRI turbulence in accretion discs at large magnetic Prandtl numbers"
• Suzuki "Magnetic braking with MESA evolutionary models in the single star and LMXB regimes"

12:15, Jan. 13, 2023

Regular seminar

• Takato Tokuno "Weakened magnetic braking mechanism through latitudinal differential rotation on spin-down of solar-type stars" ("差動回転による磁気制動抑制効果を踏まえた太陽型星の自転進化")

Journal Club

• Dong "The evolution of circumstellar discs in the Galactic Centre: an application to the G-clouds"

15:00, Dec. 14, 2022

Regular seminar

• Yukihiko Hasegawa "Mass distribution of fragments ejected by collisions of icy dust aggregates"

Journal Club

• Washinoue "The impact of multi-fluid effects in the solar chromosphere on the ponderomotive force under LTE and NEQ ionization conditions"
• Suwa "A long-duration gamma-ray burst with a peculiar origin"
• Suzuki "When Does Gyrochronology Start to Work? Stellar Rotation and Structure of the α Persei Complex"
• Tanikawa "Report on GWPAW"

15:00, Dec. 7, 2022

Guest seminar

• Dr. Takanori Kodama "ハビタブル惑星研究の最前線"

15:00, Nov. 16, 2022

Guest seminar

• Dr. Akihiko Fukui "恒星の磁気制動と潮汐力による惑星・褐色矮星の軌道進化"

Journal Club

• Tokuno "Imprint of planet formation in the deep interior of the Sun"
• Tokuno "Evidence of a signature of planet formation processes from solar neutrino fluxes"

15:00, Nov. 9, 2022

Regular seminar

• Haruka Washinoue "Heating of coronal loops with various metallicities"

13:15, Nov. 4, 2022

Guest seminar

• Dr. Koh Takahashi "Novel modeling of magneto-rotational stellar evolution"

15:00, Oct. 19, 2022

Regular seminar

• Ryo Sawada "'56Ni' problem in Supernova Explosions"

Journal Club

• Nakano "First Steps of Planet Formation Around Very Low Mass Stars and Brown Dwarfs"
• Suwa "About GRB 221009A from GCN Circulars Archive"

13:15, Oct. 7, 2022

Regular seminar

• Ryunosuke Nakano "Central star mass dependence of Protoplanetary disk evolution by Photoevaporation"

Journal Club

• Tanaka "Sharp Signals of Boson Clouds in Black Hole Binary Inspirals"
• Suzuki "A Sun-like star orbiting a black hole"
• Tokuno "30 to 100-kG magnetic fields in the cores of red giant stars"

13:15, Sep. 30, 2022

Regular seminar

• Shin'ichirou Yoshida "Numerical modeling of very low-mass stars and brown dwarfs in rapid rotation"

Journal Club

• Shinoda "Determine the Core Structure and Nuclear Equation of State of Rotating Core-Collapse Supernovae with Gravitational Waves by Convolutional Neural Networks"

10:00, Jul. 28, 2022

Regular seminar

• ChuShu Qu "NICER, XMM-Newton等X線天文衛星データを用いたマグネターの時系列解析"
• Kengo Shinoda "Athena++を用いた超新星爆発でのfallback質量降着流の３次元シミュレーション"
• Hiroki Kawashimo "Pair-instability supernovaにおける元素合成とC12(alpha,gamma)O16反応率の影響"
• Masahiko Akatsuka "Unified Understanding of Mass Accretion and Mass Loss by MRI in Protoplanetary Disks"
• Takato Tokuno "Non-constant period spacing Delta Pco about g-modes of the gamma Dor stars"

10:00, Jul. 21, 2022

Guest seminar

• Tomoaki Matsumoto "High resolution MHD simulations of circumbinary materials: MRI and angular momentum transport in the circumbinary disk"

10:00, Jul. 14, 2022

Journal club (JC)

• Qu "Tangled magnetic field model of QPOs"
• Tanikawa "On Trapped Modes In Variable White Dwarfs As Probes Of The 12C(α,γ)16O Reaction Rate"
• Suwa "PSR J0952-0607: The Fastest and Heaviest Known Galactic Neutron Star"
• Suwa "IXPE Observations of the Crab Pulsar and Nebula"
• Suzuki "Integrated Mass Loss of Evolved Stars in M4 using Asteroseismology"

10:00, Jul. 7, 2022

Regular seminar (RS)

• Yasuo Doi "Observation of the magnetic field across a Galactic arm"

Journal club (JC)

• Kawashimo "SN 2020wnt: a slow-evolving carbon-rich superluminous supernova with no O II lines and a bumpy light curve"
• Hasegawa "Samples returned from the asteroid Ryugu are similar to Ivuna-type carbonaceous meteorites"

10:00, Jun. 30, 2022

Regular seminar (RS)

• Takato Tokuno "Effect of differential rotation on long-time evolution of stellar spin"

Journal club (JC)

• Hattori "The Late-Time Light Curves of Type Ia Supernovae: Confronting Models with Observations"
• Suwa "Observation of a correlated free four-neutron system"

10:00, Jun. 23, 2022

Regular seminar (RS)

• Tetsuya Hama "Transmission Electron Microscopy Study of the Morphology of Interstellar Ice Analogues"

10:00, Jun. 16, 2022

Regular seminar (RS)

• Junya Tanaka "r-modes instability of fermionic dark star"

Journal club (JC)

• Akatsuka "Formation of Dust Rings and Gaps in Non-ideal MHD Disks Through Meridional Gas Flows"
• Tanikawa "Gaia Data Release 3: Stellar multiplicity, a teaser for the hidden treasure"

10:00, Jun. 9, 2022

Regular seminar (RS)

• Chongyang Zhang "Magnetic activity in the galactic center bulge region - molecular loops driven by Parker instability"

Journal club (JC)

• Suwa "Constraining Neutron-Star Matter with Microscopic and Macroscopic Collisions"

10:00, Jun. 2, 2022

Regular seminar (RS)

• Ataru Tanikawa "Euclid detectability of pair instability supernovae in binary population synthesis model consistent with merging binary black hole"

Journal club (JC)

• Dong "Growth after the streaming instability: The radial distance dependence of the planetary growth"
• Doi "Dust coagulation during the early stages of star formation: molecular cloud collapse and first hydrostatic core evolution"
• Suzuki "Non-detection of 6Li in Spite plateau stars with ESPRESSO"
• Suwa "Discovery of a radio-emitting neutron star with an ultra-long spin period of 76 s"
• Hasegawa "The Streaming Instability Cannot Form Planetesimals from mm-size Grains in Pressure Bumps"

10:00, May 26, 2022

Regular seminar (RS)

• ChuShu Qu "Correlation between short bursts and outburst of magnetars"
• Kengo Shinoda "膨張宇宙におけるスカラー場の量子論"

Journal club (JC)

• Tokuno "Asteroseismic inference of the near-core magnetic field strength in the main sequence B star HD 43317"
• Suzuki "Implications of the Non-Observation of 6Li in Halo Stars for the Primordial 7Li Problem"

10:00, May 19, 2022

Regular seminar (RS)

• Eriko Hattori "ティコ・ブラーエ超新星残骸の爆発噴出物の元素分布"
• Hiroki Kawashimo "Magnetic Anisotropy of lambda-(BEDT-STF)_2 Fe_x Ga_(1-x) Cl_4"

Journal club (JC)

• Zhang "Massive core/star formation triggered by cloud-cloud collision: II High-speed collisions of magnetized clouds"

10:00, May 12, 2022

Regular seminar (RS)

• Li Dong "Design and implementation of school information management query system based on SSM framework"
• Masahiko Akatsuka "Dust Dynamics in Protoplanetary Disks with Magnetically Driven Winds"

Journal club (JC)

• Washinoue "Detection of stellar-like abundance anomalies in the slow solar wind"
• Suwa "The jet and resolved features of the central supermassive black hole of M 87 observed with EHT"
• Suwa "Ergomagnetosphere, Ejection Disc, Magnetopause in M87. I Global Flow of Mass, Angular Momentum, Energy and Current"

10:00, Apr. 21, 2022

Regular seminar (RS)

• Yudai Suwa "Toward modeling complete supernova neutrino emissions"

Journal club (JC)

• Nakano "High-resolution ALMA observations of transition disk candidates in Lupus"
• Yoshida "When Do Stars Go BOOM?"

10:00, Apr. 14, 2022

Regular seminar (RS)

• Takeru K. Suzuki "Cylindrical Shearing Box"

Journal club (JC)

• Tanaka "The evaporation and Greybody factor of the new EUP-corrected Schwarzschild black hole"
• Yoshida "Discovery of a Meteor of Interstellar Origin"
• Yoshida "Magnetically supramassive neutron stars"
• Suwa "High-precision measurement of the W boson mass with the CDF II detector"