令和4(2022)年度談話会
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開始行:
[[IoA_Seminar]]
#contents
* 講演リスト [#occ7a02f]
** No. 399: 28 th Mar. 2023 (Tue) 15:00 - 16:00 [#l6481efd]
*** Speaker: Seiji Fujimoto (UT Austin) [#qbb21ec1]
*** Title: Exploring visible and obscured sides of the ea...
Language: English
Abstract: Understanding galaxy formation and evolution re...
observations of radiation from distant galaxies composed ...
dust. In this talk, I will overview my recent and ongoing...
distant Universe in scales of the cosmic structure, circu...
interstellar media, and central black holes, with the opt...
submm/mm facilities such as Hubble, ALMA, and JWST. First...
the results from the 100-hrs large program of the ALMA Le...
Survey and its implication for the origin of the CIB and ...
the cosmic star-formation rate density. Next, I will talk...
cycle in and outside of early galaxies revealed by deep A...
observations, and young quasars at z~5-9 reported one aft...
the JWST began its operation, along with the discovery of...
young quasar in a dust-enshrouded starburst at z=7.2. Fin...
introduce ongoing JWST and ALMA programs that I have been...
a JWST large Lensing Cluster Survey in planning.
** No. 398: 20 th Mar. 2023 (Mon) 14:00 - 15:30 [#l6481efd]
*** Speaker: 田村元秀 (東京大学/アストロバイオロジーセン...
*** Title: Exoplanet Observations with TMT: Expectations ...
Language: English
Abstract: Exoplanet observations have enormously expanded...
years. More than 5000 exoplanets have been discovered and...
can even double this number. Not only detections but also...
of exoplanets have been explored. In fact, this field is ...
the major science drivers for the future large telescopes...
this talk, I will highlight the current exoplanet observa...
using the indirect methods of the Doppler and transit as ...
imaging and characterizations with Subaru and other teles...
great expectations I will discuss what could be the key e...
of TMT.
** No. 397: 20th December 2022 (Tue.) 16:15 - 17:15 [#t6f...
*** Speaker: Brian Thorsbro (Department of Astronomy, Gra...
*** Title: Clues to galaxy evolution from chemical abunda...
Language: English
Abstract: I present a detailed study of the composition o...
them confirmed to be in the nuclear star cluster. As a co...
with similar stellar parameters have also observed. The o...
trends versus [Fe/H] for stars in the Galactic center. Wh...
metallicities, the [Si/Fe] abundance is found to be enhan...
speculate on enrichment scenarios to explain such a trend...
scenarios. Further, high resolution spectroscopy performe...
been identified by Nishiyama et al. (2016) as possible in...
** No. 396: 15th December 2022 (Thu), 15:30-16:30 [#w6204...
*** Speaker: Kazuya Matsubayashi (Institute of Astronomy,...
*** Title: Development of Optical Instruments for Seimei ...
Language: English
Abstract: Follow-up observations for rapid transients fou...
** No. 395: 6th December 2022 (Tue) 16:15 - 17:15 [#cffbf...
*** Speaker: Oscar Agertz (Department of Astronomy and Th...
*** Title: The VINTERGATAN project: towards understanding...
Language: English
Abstract: In this talk I will highlight recent advances i...
** No. 394: 29 November 2022 (Tue) 16:15 - 17:15 [#o23e71...
*** Speaker: 谷川清隆（国立天文台）/ Kiyotaka Tanikawa（N...
*** Title: Discovery of triple collision orbits in the ge...
Language: English
Abstract: We recently (Tanikawa et al. 2019, 2021) discov...
** No. 393: 22 November 2022 (Tue.), 16:15-17:15 [#tada4...
*** Speaker: Zsolt Keszthelyi （国立天文台) [#t230330b]
*** Title: The effects of surface fossil magnetic fields ...
Language: English
Abstract: Magnetism plays a vital role in several astroph...
** No. 392: 15 November 2022 (Tue.), 16:15-17:15 [#tada4...
*** Speaker: Anish Amarsi (Department of Physics and Astr...
*** Title: Solar and stellar spectroscopy using 3D non-L...
Language: English
Abstract: Stars leave their signatures on the light that ...
** No. 391: 11 November 2022 (Fri.), 13:15-14:15 [#tada45...
*** Speaker: Victor Debattista (University of Central Lan...
*** Title: The formation of the box/peanut bulge of the M...
Language: English
Abstract: The bulge of the Milky Way constitutes some 25-...
** No. 390: 25 October 2022 (Tue.), 16:15-17:15 [#tada4500]
*** Speaker: Takami Kuroda (Max Planck Institute) [#t2303...
*** Title: The death of massive stars and the birth of va...
Language: English
Abstract: The final fate of massive stars is the moment o...
Our results suggest that less massive stars may successfu...
** No. 389: 18 October 2022 (Thu) 15:30 - 16:30 [#t9d8c63d]
*** Speaker: 小林 将人 (国立天文台) [#d2b8ed60]
*** Title: Lifecycle of molecular clouds driven by HI gas...
Language: English
Abstract: Molecular clouds host star formation so that th...
To investigate the formation and evolution of molecular c...
If time allows, we may briefly mention some indications t...
** No. 388: 28 July 2022 (Thu) 15:30 - 16:30 [#i28b7182]
*** Speaker: 細川 隆史(京都大学) [#n80fab3e]
*** Title: High-mass star formation in the early universe...
Language: English
Abstract: I present our recent efforts toward understandi...
Whereas simulations reveal the Pop III star formation in ...
** No. 387: 21 July 2022 (Thu) 15:30 - 16:30 [#vb951864]
*** Speaker: Mason Leist (University of Texas San Antonio...
*** Title: Resolving Polar Dust in AGN with JWST: Going B...
Language: English
Abstract: The launch of the James Webb Space Telescope (J...
to revolutionize infrared astronomy and our understanding...
outflows in active galactic nuclei (AGN). David Rosario (...
University, U.K.) has been awarded JWST science time to e...
characterize diffuse polar dust emission found in AGN usi...
Mid-infrared Instrument (MIRI) imaging. The Galactic Acti...
Outflow Survey (GATOS2) collaboration will have access to...
which I am a member. Thanks to JWST’s exquisite low surfa...
sensitivity in the mid-infrared (MIR; 5-25 μm) observatio...
polar dust emission found in AGN will be enabled unpreced...
Relying on JWST’s stable PSF, we plan to use deconvolutio...
structure of this diffuse emission below the resolution o...
We will explore five different deconvolution techniques a...
method based on comparisons of the flux conservation, FWH...
ratios of the deconvolved images with an input model. To ...
technique, we have used the MIRI simulation software (MIR...
JWST’s complex PSF convolved with a toy model of an AGN c...
resolved bicone and an unresolved AGN point source. Here ...
preliminary results on our assessment of the optimum deco...
** No. 386: 12 July 2022 (Tue) 16:15 - 17:15 [#vb951864]
*** Speaker: Yutaro Kofuji（Department of Astronomy, The ...
*** Title: Imaging of the Supermassive Black Hole in Our ...
Language: English
Abstract:
The first event horizon scale image of the supermassive b...
** No. 385: 7 July 2022 (Thu) 15:30 - 16:30 [#t05656f2]
*** Speaker: Dr. Paul Hertz (NASA Astrophysics Division D...
*** Title: NASA Astrophysics: From the past to the future...
Language: English
** No. 384: 5 July 2022 (Tue) 16:15 - 17:15 [#d9b6481b]
*** Speaker: 伊藤 慧（東京大学天文学教室） [#bb04fbb3]
*** Title: Environment and AGN activity of distant quiesc...
Language: Japanese
Abstract: Recent multi-band observations have found that ...
** No. 383: 21 June 2022 (Tue) 16:15 - 17:15 [#wb52737b]
*** Speaker: Paul K. H. Yeung（東京大学物理学教室） [#hf0...
*** Title: Cosmic-ray Acceleration & Escape from Intermed...
Language: English
Abstract: Hadronic γ-ray sources of supernova remnant — m...
** No. 382: 6 June 2022 (Thu) 15:30 - 16:30 [#uc0e9643]
*** Speaker: 堀内 貴史（東京大学天文学教育研究センター） ...
*** Title: Evaluation of magnitudes of the Starlink satel...
Language: English
Abstract:
The U.S. company, SpaceX plans to launch 42,000 Starlink ...
mid-2020s. However, these satellites orbit at relatively ...
(e.g. 550 km), and there are concerns that the light poll...
sunlight reflection likely affects observations. In Janua...
launched a test satellite, Darksat with a black coating o...
reduce the reflection flux. In order to verify the effect...
coating, we observed Darksat and unpainted Starlink satel...
simultaneous multicolor observations (g’: green, Rc: red,...
near-infrared) with the 105 cm Murikabushi telescope/MITS...
magnitude of Darksat is about 7, being difficult to see w...
eyes, this brightness is sufficient to affect any observa...
2020, SpaceX launched Visorsat, which is a satellite with...
reduce the reflected sunlight. At the present stage, ther...
verification on whether the sun visor is effective at var...
In this study, we are therefore conducting the simultaneo...
observations of Visorsat and the ordinary Starlink satell...
OISTER campaign. The preliminary observations of Visorsat...
Murikabushi telescope have already shown that the apparen...
Visorsat is not fainter than that of Darksat, ranging fro...
band) to 5.7 mag (Ic band). Since most of the satellites ...
SpaceX in the future will be visor satellites, it is very...
investigate the effects of the Starlink satellites as soo...
reduce the light pollution in astronomical observations.
** No. 381: 10 May 2022 (Tue) 16:15 - 17:15 [#q621959c]
*** Speaker: 西村優里（東京大学天文学教室） ／ Yuri Nishi...
*** Title: Molecular spectroscopy in local and high-redsh...
Language: Japanese
Abstract:
Thanks to the technical advancement of (sub)millimeter ob...
facilities, a great number of molecular lines are now rou...
with high sensitivity and high angular resolution. These ...
and line ratios are useful tools for studying physical, k...
chemical properties of extragalactic systems. To fully ex...
diagnostics, it is important to relate different size sca...
detailed understanding of nearby systems by spatially-res...
is essential to better interpretation of more distant obj...
be observed at the same physical resolution.
In this talk, I will present (1) 10 pc-scale multiline ma...
Galactic star-forming region W3(OH); (2) spatially- and s...
HCN and HCO+ observations of local (ultra)luminous infrar...
the CONquest sample (for more detail on CONquest, see Fal...
(3) ALMA Band 3 (rest-frame ~350 GHz) line survey toward ...
gravitationally-lensed quasar at z=2.56. I will first dis...
molecular emission arises from which part of the molecula...
focus on how galactic-scale dynamics, such as outflows, c...
ratios.
終了行:
[[IoA_Seminar]]
#contents
* 講演リスト [#occ7a02f]
** No. 399: 28 th Mar. 2023 (Tue) 15:00 - 16:00 [#l6481efd]
*** Speaker: Seiji Fujimoto (UT Austin) [#qbb21ec1]
*** Title: Exploring visible and obscured sides of the ea...
Language: English
Abstract: Understanding galaxy formation and evolution re...
observations of radiation from distant galaxies composed ...
dust. In this talk, I will overview my recent and ongoing...
distant Universe in scales of the cosmic structure, circu...
interstellar media, and central black holes, with the opt...
submm/mm facilities such as Hubble, ALMA, and JWST. First...
the results from the 100-hrs large program of the ALMA Le...
Survey and its implication for the origin of the CIB and ...
the cosmic star-formation rate density. Next, I will talk...
cycle in and outside of early galaxies revealed by deep A...
observations, and young quasars at z~5-9 reported one aft...
the JWST began its operation, along with the discovery of...
young quasar in a dust-enshrouded starburst at z=7.2. Fin...
introduce ongoing JWST and ALMA programs that I have been...
a JWST large Lensing Cluster Survey in planning.
** No. 398: 20 th Mar. 2023 (Mon) 14:00 - 15:30 [#l6481efd]
*** Speaker: 田村元秀 (東京大学/アストロバイオロジーセン...
*** Title: Exoplanet Observations with TMT: Expectations ...
Language: English
Abstract: Exoplanet observations have enormously expanded...
years. More than 5000 exoplanets have been discovered and...
can even double this number. Not only detections but also...
of exoplanets have been explored. In fact, this field is ...
the major science drivers for the future large telescopes...
this talk, I will highlight the current exoplanet observa...
using the indirect methods of the Doppler and transit as ...
imaging and characterizations with Subaru and other teles...
great expectations I will discuss what could be the key e...
of TMT.
** No. 397: 20th December 2022 (Tue.) 16:15 - 17:15 [#t6f...
*** Speaker: Brian Thorsbro (Department of Astronomy, Gra...
*** Title: Clues to galaxy evolution from chemical abunda...
Language: English
Abstract: I present a detailed study of the composition o...
them confirmed to be in the nuclear star cluster. As a co...
with similar stellar parameters have also observed. The o...
trends versus [Fe/H] for stars in the Galactic center. Wh...
metallicities, the [Si/Fe] abundance is found to be enhan...
speculate on enrichment scenarios to explain such a trend...
scenarios. Further, high resolution spectroscopy performe...
been identified by Nishiyama et al. (2016) as possible in...
** No. 396: 15th December 2022 (Thu), 15:30-16:30 [#w6204...
*** Speaker: Kazuya Matsubayashi (Institute of Astronomy,...
*** Title: Development of Optical Instruments for Seimei ...
Language: English
Abstract: Follow-up observations for rapid transients fou...
** No. 395: 6th December 2022 (Tue) 16:15 - 17:15 [#cffbf...
*** Speaker: Oscar Agertz (Department of Astronomy and Th...
*** Title: The VINTERGATAN project: towards understanding...
Language: English
Abstract: In this talk I will highlight recent advances i...
** No. 394: 29 November 2022 (Tue) 16:15 - 17:15 [#o23e71...
*** Speaker: 谷川清隆（国立天文台）/ Kiyotaka Tanikawa（N...
*** Title: Discovery of triple collision orbits in the ge...
Language: English
Abstract: We recently (Tanikawa et al. 2019, 2021) discov...
** No. 393: 22 November 2022 (Tue.), 16:15-17:15 [#tada4...
*** Speaker: Zsolt Keszthelyi （国立天文台) [#t230330b]
*** Title: The effects of surface fossil magnetic fields ...
Language: English
Abstract: Magnetism plays a vital role in several astroph...
** No. 392: 15 November 2022 (Tue.), 16:15-17:15 [#tada4...
*** Speaker: Anish Amarsi (Department of Physics and Astr...
*** Title: Solar and stellar spectroscopy using 3D non-L...
Language: English
Abstract: Stars leave their signatures on the light that ...
** No. 391: 11 November 2022 (Fri.), 13:15-14:15 [#tada45...
*** Speaker: Victor Debattista (University of Central Lan...
*** Title: The formation of the box/peanut bulge of the M...
Language: English
Abstract: The bulge of the Milky Way constitutes some 25-...
** No. 390: 25 October 2022 (Tue.), 16:15-17:15 [#tada4500]
*** Speaker: Takami Kuroda (Max Planck Institute) [#t2303...
*** Title: The death of massive stars and the birth of va...
Language: English
Abstract: The final fate of massive stars is the moment o...
Our results suggest that less massive stars may successfu...
** No. 389: 18 October 2022 (Thu) 15:30 - 16:30 [#t9d8c63d]
*** Speaker: 小林 将人 (国立天文台) [#d2b8ed60]
*** Title: Lifecycle of molecular clouds driven by HI gas...
Language: English
Abstract: Molecular clouds host star formation so that th...
To investigate the formation and evolution of molecular c...
If time allows, we may briefly mention some indications t...
** No. 388: 28 July 2022 (Thu) 15:30 - 16:30 [#i28b7182]
*** Speaker: 細川 隆史(京都大学) [#n80fab3e]
*** Title: High-mass star formation in the early universe...
Language: English
Abstract: I present our recent efforts toward understandi...
Whereas simulations reveal the Pop III star formation in ...
** No. 387: 21 July 2022 (Thu) 15:30 - 16:30 [#vb951864]
*** Speaker: Mason Leist (University of Texas San Antonio...
*** Title: Resolving Polar Dust in AGN with JWST: Going B...
Language: English
Abstract: The launch of the James Webb Space Telescope (J...
to revolutionize infrared astronomy and our understanding...
outflows in active galactic nuclei (AGN). David Rosario (...
University, U.K.) has been awarded JWST science time to e...
characterize diffuse polar dust emission found in AGN usi...
Mid-infrared Instrument (MIRI) imaging. The Galactic Acti...
Outflow Survey (GATOS2) collaboration will have access to...
which I am a member. Thanks to JWST’s exquisite low surfa...
sensitivity in the mid-infrared (MIR; 5-25 μm) observatio...
polar dust emission found in AGN will be enabled unpreced...
Relying on JWST’s stable PSF, we plan to use deconvolutio...
structure of this diffuse emission below the resolution o...
We will explore five different deconvolution techniques a...
method based on comparisons of the flux conservation, FWH...
ratios of the deconvolved images with an input model. To ...
technique, we have used the MIRI simulation software (MIR...
JWST’s complex PSF convolved with a toy model of an AGN c...
resolved bicone and an unresolved AGN point source. Here ...
preliminary results on our assessment of the optimum deco...
** No. 386: 12 July 2022 (Tue) 16:15 - 17:15 [#vb951864]
*** Speaker: Yutaro Kofuji（Department of Astronomy, The ...
*** Title: Imaging of the Supermassive Black Hole in Our ...
Language: English
Abstract:
The first event horizon scale image of the supermassive b...
** No. 385: 7 July 2022 (Thu) 15:30 - 16:30 [#t05656f2]
*** Speaker: Dr. Paul Hertz (NASA Astrophysics Division D...
*** Title: NASA Astrophysics: From the past to the future...
Language: English
** No. 384: 5 July 2022 (Tue) 16:15 - 17:15 [#d9b6481b]
*** Speaker: 伊藤 慧（東京大学天文学教室） [#bb04fbb3]
*** Title: Environment and AGN activity of distant quiesc...
Language: Japanese
Abstract: Recent multi-band observations have found that ...
** No. 383: 21 June 2022 (Tue) 16:15 - 17:15 [#wb52737b]
*** Speaker: Paul K. H. Yeung（東京大学物理学教室） [#hf0...
*** Title: Cosmic-ray Acceleration & Escape from Intermed...
Language: English
Abstract: Hadronic γ-ray sources of supernova remnant — m...
** No. 382: 6 June 2022 (Thu) 15:30 - 16:30 [#uc0e9643]
*** Speaker: 堀内 貴史（東京大学天文学教育研究センター） ...
*** Title: Evaluation of magnitudes of the Starlink satel...
Language: English
Abstract:
The U.S. company, SpaceX plans to launch 42,000 Starlink ...
mid-2020s. However, these satellites orbit at relatively ...
(e.g. 550 km), and there are concerns that the light poll...
sunlight reflection likely affects observations. In Janua...
launched a test satellite, Darksat with a black coating o...
reduce the reflection flux. In order to verify the effect...
coating, we observed Darksat and unpainted Starlink satel...
simultaneous multicolor observations (g’: green, Rc: red,...
near-infrared) with the 105 cm Murikabushi telescope/MITS...
magnitude of Darksat is about 7, being difficult to see w...
eyes, this brightness is sufficient to affect any observa...
2020, SpaceX launched Visorsat, which is a satellite with...
reduce the reflected sunlight. At the present stage, ther...
verification on whether the sun visor is effective at var...
In this study, we are therefore conducting the simultaneo...
observations of Visorsat and the ordinary Starlink satell...
OISTER campaign. The preliminary observations of Visorsat...
Murikabushi telescope have already shown that the apparen...
Visorsat is not fainter than that of Darksat, ranging fro...
band) to 5.7 mag (Ic band). Since most of the satellites ...
SpaceX in the future will be visor satellites, it is very...
investigate the effects of the Starlink satellites as soo...
reduce the light pollution in astronomical observations.
** No. 381: 10 May 2022 (Tue) 16:15 - 17:15 [#q621959c]
*** Speaker: 西村優里（東京大学天文学教室） ／ Yuri Nishi...
*** Title: Molecular spectroscopy in local and high-redsh...
Language: Japanese
Abstract:
Thanks to the technical advancement of (sub)millimeter ob...
facilities, a great number of molecular lines are now rou...
with high sensitivity and high angular resolution. These ...
and line ratios are useful tools for studying physical, k...
chemical properties of extragalactic systems. To fully ex...
diagnostics, it is important to relate different size sca...
detailed understanding of nearby systems by spatially-res...
is essential to better interpretation of more distant obj...
be observed at the same physical resolution.
In this talk, I will present (1) 10 pc-scale multiline ma...
Galactic star-forming region W3(OH); (2) spatially- and s...
HCN and HCO+ observations of local (ultra)luminous infrar...
the CONquest sample (for more detail on CONquest, see Fal...
(3) ALMA Band 3 (rest-frame ~350 GHz) line survey toward ...
gravitationally-lensed quasar at z=2.56. I will first dis...
molecular emission arises from which part of the molecula...
focus on how galactic-scale dynamics, such as outflows, c...
ratios.
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