Apr. 3 Mon 16:00-17:00 NAOJ Seminar Zoom / Large Seminar Room (hybrid)
Apr. 4 Tue 10:00-11:30 太陽系小天体セミナー Zoom
Apr. 5 Wed 14:30-15:30 ALMA-J seminar Zoom / Large Seminar Room(hybrid)
Apr. 6 Thu 14:00-15:00 Tea Talk Zoom
Apr. 6 Thu 14:30-15:30 ALMA-J seminar Zoom / ALMA building #102 (hybrid)
Apr. 7 Fri 16:00-17:00 NAOJ Seminar Zoom / Large Seminar Room (hybrid)
詳細は下記からご覧ください。
=============== Apr. 3 Mon ===============
Campus：Mitaka
Seminar：NAOJ Seminar
Regularly Scheduled/Sporadic：Sporadic
Date and time：2023 April 3, 16:00-17:00
Place： Zoom/Large Seminar Room(hybrid)
Speaker:Seiji Fujimoto
Affiliation：NASA Hubble Fellow, Department of Astronomy,
The University of Texas at Austin
Title：Exploring visible and obscured sides of the early Universe – Today and Beyond –
Abstract：Understanding galaxy formation and evolution requires comprehensive observations of radiation from stars, gas,
and dust in distant galaxies. In this talk, I will overview my recent and ongoing studies on distant universe in scales of the cosmic structure,
circum-galactic and inter-stellar media, and central black holes, with the optical/NIR and submm/mm facilities such as Hubble,
ALMA, and JWST. First, I will present the results from the 100-hrs large program of the ALMA Lensing Cluster Survey and
its implication for the origin of the Cosmic Infrared Background Light and the dust-obscured side of the cosmic star-formation rate density.
Next, I will talk about the Baryon cycle in and outside early galaxies revealed by deep ALMA and JWST observations. Finally,
I will talk about young quasars at z~5-9 reported one after another since the JWST began its operation, along with the discovery of a rapidly growing young quasar
in a dust-enshrouded starburst at z=7.2. I will also introduce ongoing JWST and ALMA programs that I have been leading as a PI and a JWST large Lensing Cluster Survey in planning.
Facilitator
-Name：Moriya, Takashi
=============== Apr. 4 Tue ===============
キャンパス：三鷹
セミナー名：太陽系小天体セミナー
定例・臨時の別：定例
日時：4月4日（火曜日）10時00分～11時30分
場所：zoom
世話人の連絡先
名前：渡部潤一
=============== Apr. 5 Wed ===============
Campus：Mitaka
Seminar：ALMA-J seminar
Regularly Scheduled/Sporadic： Every Wednesday
Date and time：April 5th 2023 (Wed), 14:30-15:30
Place: Subaru large seminar room / Zoom (hybrid)
Speaker: John Carpenter
Affiliation: Joint ALMA Observatory
Title: TBD
Abstract: TBD
=============== Apr. 6 Thu ===============
キャンパス：三鷹 野辺山 水沢 岡山 ハワイ
セミナー名：Tea Talk
定例・臨時の別：臨時
日時：4/6（木）14：00～15：00
場所：Zoom
講演者：Blumenthal Kelly
所属：天文情報センター国際普及室
タイトル：OAO Communications Strategy and Research
世話人の連絡先：
-名前：藤田登起子
-備考 参加方法：Zoom
=============== Apr. 6 Thu ===============
Campus：Mitaka,
Seminar：ALMA-J seminar
Regularly Scheduled/Sporadic：Sporadic
Date and time: April 6th 2023 (Thu), 14:30-15:30
Place:Zoom / ALMA building #102 (hybrid)
Speaker: Nichol Cunningham
Affiliation: University Grenoble Alpes
Title: ALMA-IMF: Exploring the core population, kinematics, and chemistry towards 15 massive protoclusters
Abstract: To understand the mechanism of star formation, it is fundamental to investigate the distribution,
morphology and kinematics of the gas and dust in cores, clumps and clusters. This requires probing a large homogeneous selection of protoclusters
recently achieved within the ALMA-IMF Large program. I will present an overview of the ALMA-IMF Large Program (Motte et al., 2022),
which covers a total non-contiguous area of 53 square parsecs towards 15 massive nearby (2 – 5.5 kpc)
protoclusters that span a range of well-defined early evolutionary stages and masses (including W51-IRS2, W43).
ALMA-IMF covers a wealth of molecular lines, such as DCN (3-2), N2H+ (1-0), N2D+ (3-2), DCO+ (3-2), C18O (2-1), 13CS (5-4), and SiO (5-4).
I will present the first highlights from the ALMA-IMF survey, exploring the core population and core mass function (CMF),
along with the kinematics, chemical and morphological differences across the 15 protoclusters in the survey.
I will then present recent work utilizing the DCN (3-2) emission as a tracer of the gas and kinematics associated with continuum cores across
the 15 protoclusters (Cunningham et al., subm). DCN (3-2) traces a diversity of morphology and complex velocity structure,
which tends to be more filamentary and widespread in evolved regions and is more compact in the young and intermediate-stage protoclusters.
DCN (3-2) is detected towards a higher percentage of cores in evolved regions and is a more complete tracer of the core population in evolved protoclusters,
likely due to the time evolution of the temperature and density with protocluster evolution. Furthermore,
I will present the initial results of a multi-line analysis towards two protoclusters from ALMA-IMF with different evolutionary classifications,
the young protocluster G338.93 and an evolved G333.60, which show marked differences in their chemistry, morphology and kinematics.
Facilitator: Toshiki Saito, Andrea Silva
=============== Apr. 7 Fri ===============
Campus：Mitaka
Seminar：NAOJ Seminar
Regularly Scheduled/Sporadic：Regularly Scheduled
Date and time：2023 Avrl 7, 16:00-17:00
Place： Zoom/Large Seminar Room(hybrid)
Speaker:Miki Nakajima
Affiliation：Department of Earth and Environmental Sciences
University of Rochester
Title：Origin of moons in the solar system and beyond
Abstract：The Moon is thought to have formed by a large impact, but the details are not well understood.
The “standard” giant impact hypothesis suggests that the Moon formed from a silicate liquid-rich disk that was generated by an impact between
Earth and a Mars-sized object. Alternatively, the Moon could have formed by a more energetic impact, which would have formed a vapor-rich disk.
Here, we propose that a large Moon cannot form from a vapor-rich disk due to strong gas drag in the disk based on hydrodynamics calculations.
We will discuss implications of this study for moons in the solar system and extrasolar systems (exomoons).
Facilitator
-Name：Moriya, Takashi