カテゴリー: その他

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July 22 Mon 13:00-15:00
SOKENDAI Doctoral Thesis Defense / 総研大博士学位論文審査会
hybrid; Large Seminar Room in Subaru Building and Zoom

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July 23 Tue 10:00-11:30
太陽系小天体セミナー (Solar System Minor Body Seminar)
Zoom

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July 23 Tue 13:00-15:00
SOKENDAI Doctoral Thesis Defense / 総研大博士学位論文審査会
hybrid; Large Seminar Room in Subaru Building and Zoom

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July 24 Wed 10:00-12:00
SOKENDAI Colloquium
hybrid; Large Seminar Room in Subaru Building and Zoom

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July 24 Wed 15:30-16:30
NAOJ Science Colloquium
Zoom

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詳細は下記からご覧ください。

=============== July 22 Mon===============

Campus：Mitaka
Seminar：SOKENDAI Doctoral Thesis Defense
　　　　　 総研大博士学位論文審査会
Regularly Scheduled/Sporadic：Sporadic
Date：Monday, July 22
Time：13:00-13:40 Presentation
　　 　13:40-14:00 Q&A
　　 　14:00-15:00 Judging (Not open to public)
Place：Large Seminar Room in Subaru Building and Zoom
Speaker：Kiyoaki Doi
Title：Constraining Physical Properties of Protoplanetary Disks from Spatial Distributions of Dust Millimeter Continuum Observations
Examiner：Ken’ichi Tatematsu, Tomoya Hirota, Kazunari Iwasaki, Hidekazu Tanaka(Tohoku University), Munetake Momose(Ibaraki University)
Facilitator：Nozomu Tominaga, Graduate Student Affairs Unit

=============== July 23 Tue===============

キャンパス：三鷹
セミナー名：太陽系小天体セミナー (Solar System Minor Body Seminar)
定例・臨時の別：定例
日時：　7月　23日（火曜日）10時00分～11時30分
場所：zoom
講演者：浮田信治
タイトル: 光度曲線で探る彗星の現在・過去・未来
Abstract:
彗星の光度曲線(800枚)を描いて、その特徴を分類してみた。 ある光度曲線グループにあのC/2023 A3が属していた。 このグループの光度曲線を再現するH2O/CO2のガス生成率の数値計算モデルを作った。

世話人の連絡先
-名前：渡部潤一

備考：zoomでの参加

===============July 23 Tue==============

Campus：Mitaka
Seminar：SOKENDAI Doctoral Thesis Defense
　　　　　 総研大博士学位論文審査会
Regularly Scheduled/Sporadic: Sporadic
Date：Tuesday, July 23
Time：13:00-13:40 Presentation
　　　 13:40-14:00 Q&A
　　 　14:00-15:00 Judging (Not open to public)
Place：Large Seminar Room in Subaru Building and Zoom
Speaker：Nao Fukagawa
Title：Chemical Evolution of Dwarf Galaxies
Examiner：Nozomu Tominaga, Sakurako Okamoto, Miho Ishigaki, Masashi Chiba(Tohoku University), Satoshi Honda(Hyogo University)
Facilitator：Nozomu Tominaga, Graduate Student Affairs Unit

===============July 24 Wed==============

Campus：Mitaka
Seminar：SOKENDAI Colloquium
Regularly Scheduled/Sporadic：Scheduled
Date and time：July 24 10:00-12:00
Place：Large Seminar Room in Subaru Building and Zoom

Speaker：Ainun Azhari
Affiliation：SOKENDAI 3rd year (D1) (Supervisor:Wako Aoki, Miho Ishigaki)
Title：The Study of [Th/Eu] in Disk Stars

Speaker：Gabriel Teixeira Guimarães
Affiliation：SOKENDAI 3rd year (D1) (Supervisor:Eiichiro Kokubo, Hideko Nomura, Kazunari Iwasaki)
Title：Theoretical study of planetary dynamics

Speaker：Masato Sato
Affiliation：Not entered
Title：Not entered

Facilitator
-Name：Yoshiaki Sato

Comment：Language: English

===============July 24 Wed==============

Seminar: NAOJ Science Colloquium
Date and time: 2024 July 24 (Wed.), 15:30-16:30 JST
Place: Zoom

Speaker: Takanobu Kirihara
Affiliation: Kitami Institute of Technology
Title: Galaxy evolution with galaxy mergers
Abstract:
In the framework of hierarchical structure formation based on
cold dark matter, galaxies like the Milky Way grow up through
numerous interactions and mergers of many less massive galaxies.
These signatures are mainly imprinted in the halo region.
In recent years, the Gaia project and the Subaru HSC survey have
revealed many tidal remnants in the haloes of the Milky Way and
Andromeda galaxy, respectively. In this talk, I will provide an overview of
the halo formation process revealed by a combination of observations
and numerical simulations, referring to recent observational progress.
I also focus on the interaction between massive galaxies. I will introduce
the relationship between AGN activity, galaxy density, and interaction of
galaxies based on our recent observations and numerical simulations.

Facilitator
-Name: Haruka Kusakabe

Comment: English

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July 9 Tue 10:00-11:30
太陽系小天体セミナー (Solar System Minor Body Seminar)
Zoom

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July 10 Wed 10:30-12:00
SOKENDAI Colloquium
hybrid; Large Seminar Room in Subaru Building and Zoom

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July 10 Wed 15:30-16:30
NAOJ Science Colloquium
hybrid; Large Seminar Room in Subaru Building and Zoom

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July 11 Thu 14:00-
Visitor’s Talk
hybrid; Insei Seminar Room in Subaru Building and Zoom

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July 12 Fri 15:30-16:30
NAOJ Seminar
hybrid; Large Seminar Room in Subaru Building and Zoom

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詳細は下記からご覧ください。

=============== July 9 Tue===============

キャンパス：三鷹
セミナー名：太陽系小天体セミナー (Solar System Minor Body Seminar)
定例・臨時の別：定例
日時：　7月　9日（火曜日）10時00分～11時30分
場所：zoom
講演者：橘省吾 所属: 東京大学
タイトル: 小惑星リュウグウ・べヌーサンプルから考える太陽系の起源と進化
Abstract:
「はやぶさ2」が持ち帰ったC型小惑星リュウグウやOSIRIS-REx が 持ち帰ったB型小惑星ベヌーの分析結果を通して，見えてきた太陽系や 小惑星の起源や進化について，皆さんと議論できればと考えております．

世話人の連絡先
-名前：渡部潤一

備考：zoomでの参加

=============== July 10 Wed===============

Campus：Mitaka
Seminar：SOKENDAI Colloquium
Regularly Scheduled/Sporadic：Scheduled
Date and time：July 10 10:30-12:00
Place：Large Seminar Room in Subaru Building and Zoom

Speaker：Kyosuke Sato
Affiliation：SOKENDAI 3rd year (D1) (Supervisor:Sakurako Okamoto, Masayuki Tanaka, Miho Ishigaki)
Title：Study of the Formation Mechanism of Ursa Minor Dwarf Spheroidal
Galaxy using Subaru/HSC Wide Field Data

Speaker：Shun Ishigami
Affiliation：SOKENDAI 4th year (D2) (Supervisor:Hirohisa Hara, Yukio Katsukawa, Masahito Kubo)
Title：Review of “Solar coronal heating from small-scale magnetic braids (Chitta et al. 2022)”

Facilitator
-Name：Yoshiaki Sato

Comment：Language: English

===============July 10 Wed==============

Campus: Mitaka
Seminar: NAOJ Science Colloquium
Date and time: 2024 July 10 (Wed.), 15:30-16:30 JST
Place: the large seminar room / Zoom (hybrid)

Speaker: Hajime Fukushima
Affiliation: University of Tsukuba
Title: Radiation hydrodynamics simulations of massive star cluster formation

Abstract:
Globular clusters (GCs) are believed to form in early galaxies, but the formation mechanism of GCs are still debated. In the star cluster formation, radiative feedback hampers star formation and increase of stellar density. Hence, the stellar feedback is a key factor in determination of star cluster properties. In this talk, I will review the star cluster formation and star formation quenching mechanisms, and introduce our recent simulations of massive star cluster formation and metal enrichment in the GC formation.

Facilitator
-Name: Nanase Harada

Comment: English

===============July 11 Thu==============

Campus：Mitaka
Seminar：Visitor’s Talk
Regularly Scheduled/Sporadic：Sporadic
Date and time：July 11th (Thu) 14:00
On-site venue: Graduate student seminar room (院生セミナー室) in the Subaru building, NAOJ Mitaka
Speaker：Dr. Prasanta Gorai
Affiliation：University of Oslo
Title：Insights into Chemical Complexity and Diversity in Young Stellar Object
Abstract：Over 300 molecular species have been identified in the interstellar medium and circumstellar shells, revealing a diverse landscape of chemical complexity. Young Stellar Objects (YSOs) exhibit a wide variety of both simple and complex organic molecules (COMs), intricately linked to their physical properties and evolutionary stages. These objects play a pivotal role in shaping their surroundings, acting as potent sources of radiative and mechanical feedback that significantly influence the formation of interstellar molecules. Analyzing the millimeter and submillimeter spectra of YSOs offers crucial clues to the formation of numerous COMs, enhancing our understanding of the chemical complexity within these stellar nurseries. In this talk, I will discuss observational results from a large sample of YSOs and elaborate on how chemical diversity depends on the physical properties of the sources. I will also present astrochemical modeling results to describe the chemical evolution of several species and discuss how these models can be used to infer chemical origin and the physical properties of YSOs. By summarizing the current state of observational studies and astrochemical models, this presentation aims to elucidate the processes through which chemical complexity is attained in diverse YSOs.

Facilitator
-Name：Kotomi Taniguchi

Comment：(optional) English. You are also welcome to join us via zoom.
Zoom info: https://us02web.zoom.us/j/85668400316
Meeting ID: 856 6840 0316
Passcode: Please ask facilitator about zoom passcode

===============July 12 Fri==============

Campus：Mitaka
Seminar：NAOJ Seminar
Regularly Scheduled/Sporadic：Regular
Date and time：July 12, 2024 15:30-16:30
Place：Zoom/Large Seminar Room (hybrid)

Speaker：Dr. Maryam Saberi
Affiliation：University of Oslo

Title：Tracing the impact of Evolved Stars on the Galactic Chemical enrichment (ESGC)

Abstract:
In this presentation, I will discuss ESGC project, which is awarded funding from the Research Council of Norway.
The primary focus of the project is on evolved stars and their impact on enriching the chemical composition of interstellar mediums and galaxies.
I will begin by providing an introduction to evolved stars and the chemistry active in their outflow.
Solar-type stars eject a substantial amount of heavy elements and dust particles to the interstellar medium through strong stellar winds at late phases of stellar evolution, known as the asymptotic giant branch (AGB) phase, and therefore significantly influence the chemical composition of galaxies.In ESGC project, we aim to target two main gaps in our knowledge that can be significantly advanced with current observational facilities, new laboratory molecular data, and upgraded chemical models. These gaps concern the role of AGB stars in the production of fluorine in our Galaxy, which is an essential element for the maintenance of solidity in our bones and teeth, and the impact of a chromospheric UV radiation field on the chemistry and dust-formation process around AGB stars. Through this project, we aim to create a more realistic picture of the recycled materials and stardust from evolved stars by considering the impact of internal UV radiation in the chemical models. Finally, I will outline the observational and simulation approaches we are planning to use to achieve the main objectives of the project and highlighting the unique opportunities associated with each approach.

Facilitator
-Name：Jun-Ichi Morino

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June 17 Mon 13:30-14:30
Visitor’s talk
Lecture room

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June 18 Tue 9:00-17:00
博士後期課程中間報告会
hybrid; Large Seminar Room in Subaru Building and Zoom

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June 18 Tue 10:00-11:30
太陽系小天体セミナー (Solar System Minor Body Seminar)
Zoom

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June 19 Wed 10:00-12:00
SOKENDAI Colloquium
hybrid; Large Seminar Room in Subaru Building and Zoom

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詳細は下記からご覧ください。

=============== June 17 Mon===============

Campus：Mitaka
Seminar： Visitor’s talk
Regularly Scheduled/Sporadic：Sporadic
Date and time：June 17th (Mon), 13:30-14:30
Place：Lecture room
Speaker：Dr. Joel Sánchez Bermúdez
Affiliation：UNAM
Title: Revealing the physics of Young Stellar Objects with GRAVITY/VLTI
Abstract: It is well-established that low- to intermediate-mass stars form via accreting disks. Over the past decade, a remarkable variety of morphologies have been uncovered through interferometric observations at radio wavelengths (e.g., with the VLA and ALMA) and, more recently, with infrared coronagraphs (e.g., with SPHERE/VLT and GPI).
Infrared interferometers have also been employed to study these objects, allowing us (i) to resolve the inner rims of the accreting disks, (ii) the detection of accretion signatures, and (iii) the tracing of formation regions of lines such as BrG and CO.
This presentation will review some of these discoveries obtained with the GRAVITY instrument at the Very Large Telescope Interferometer.
Specifically, I will showcase state-of-the-art milliarcsecond resolution images (of both continuum and line) of several sources (HD 163296, HD 45677, and R CrA), where binarity and variability of the inner rim are observed at spatial scales less than 5 au from the forming star.
Furthermore, I will discuss open questions that we aim to address in the coming years with the anticipated advancements in infrared interferometry.
In particular, I will highlight the new capabilities of GRAVITY(+) and my role as Co-PI in the design and construction of the new high-spectral resolution mode of this instrument, which is crucial for studying young stellar objects.
Facilitator
-Name：Kotomi Taniguchi

Comment： English

キャンパス：三鷹
セミナー名：ビジタートーク
定例・臨時の別： 臨時
日時：6月17日（月曜日）　13:30~14:30
場所：講義室
講演者：Dr. Joel Sánchez Bermúdez
所属：UNAM
Title: Revealing the physics of Young Stellar Objects with GRAVITY/VLTI
Abstract: It is well-established that low- to intermediate-mass stars form via accreting disks. Over the past decade, a remarkable variety of morphologies have been uncovered through interferometric observations at radio wavelengths (e.g., with the VLA and ALMA) and, more recently, with infrared coronagraphs (e.g., with SPHERE/VLT and GPI).
Infrared interferometers have also been employed to study these objects, allowing us (i) to resolve the inner rims of the accreting disks, (ii) the detection of accretion signatures, and (iii) the tracing of formation regions of lines such as BrG and CO.
This presentation will review some of these discoveries obtained with the GRAVITY instrument at the Very Large Telescope Interferometer.
Specifically, I will showcase state-of-the-art milliarcsecond resolution images (of both continuum and line) of several sources (HD 163296, HD 45677, and R CrA), where binarity and variability of the inner rim are observed at spatial scales less than 5 au from the forming star.
Furthermore, I will discuss open questions that we aim to address in the coming years with the anticipated advancements in infrared interferometry.
In particular, I will highlight the new capabilities of GRAVITY(+) and my role as Co-PI in the design and construction of the new high-spectral resolution mode of this instrument, which is crucial for studying young stellar objects.

世話人の連絡先
-名前：谷口琴美

備考：英語

===============June 18 Tue===============

キャンパス：三鷹
セミナー名：博士後期課程中間報告会
定例・臨時の別：臨時
日時：６月18日（火曜日）　9時00分～１7時００分
場所：大セミナー室およびZoom（接続先情報は大学院係にお問い合わせください）

発表者：池田　遼太 (9:00~)
所属：総研大　天文科学専攻
タイトル：Spatially resolved studies of dust, gas, and stars in distant star-forming galaxies

発表者：吉田　有宏 (9:50~)
所属：総研大　天文科学専攻
タイトル：Constraints on the Physical and Chemical Structure of the Main Planet Forming
Regions with ALMA

発表者：石神　瞬 (10:40~)
所属：総研大　天文科学専攻
タイトル：Observational approach to reveal heating properties of coronal loops

発表者：一村　亮太 (11:30~)
所属：総研大　天文科学専攻
タイトル：Modeling Carbon Isotope Fractionation of Complex Organic Molecules in Star and Planet Forming Regions

発表者：西垣　萌香 (13:20~)
所属：総研大　天文科学専攻
タイトル：経験的モデルに基づく星間ガスと銀河周辺ガスの化学進化の研究

発表者：鈴木　卓哉 (14:10~)
所属：総研大　天文科学専攻
タイトル：Dark Matter Annihilation in Dark Matter Halos around Primordial Black Holes

発表者：Bhardwaj, Shubham (15:00~)
所属：総研大　天文科学専攻
タイトル：GRBs and machine learning

発表者：Naufal, Abdurrahman (15:50~)
所属：総研大　天文科学専攻
タイトル：Metamorphosis of Galaxies in Protoclusters at z~2

Abstract：(optional)

世話人の連絡先
-名前：大学院係　池添

備考：Japanese, English, Zoom

===============June 18 Tue==============

キャンパス：三鷹
セミナー名：太陽系小天体セミナー (Solar System Minor Body Seminar)
定例・臨時の別：定例
日時：　6月　18日（火曜日）10時00分～11時30分
場所：zoom
講演者：浦川聖太郎
所属: 日本スペースガード協会
タイトル: 研究紹介

世話人の連絡先
-名前：渡部潤一

備考：zoomでの参加

===============June 19 Wed==============

Campus：Mitaka
Seminar：SOKENDAI Colloquium
Regularly Scheduled/Sporadic：Scheduled
Date and time：Jun 19 10:00-12:00
Place：Large Seminar Room in Subaru Building and Zoom

Speaker：Seiya Imai
Affiliation：Not entered
Title：Not entered

Speaker：Kousuke Ishihara
Affiliation：Not entered
Title：Not entered

Speaker：Ryota Hatami
Affiliation：SOKENDAI 2nd year (M2) (Supervisor:Nozomu Tominaga, Tomoya Takiwaki, Koh Takahashi)
Title：Synthesis of Sc, Ti, and V in Core-Collapse Supernovae toward Constraining the Explosion Mechanism

Facilitator
-Name：Yoshiaki Sato

Comment：Language: English