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Activity > Lunch Talk

Lunch Talk (2020)

ASIAA Lunch Talk is an institute-wide event allowing ASIAA researchers from different fields to discuss astronomy in a very casual manner. The informal meeting is usually held at lunch time on every Monday. Occasionally visitors are also invited to the lunch talk to share their research and ideas with ASIAA researchers.

    Contact
  • Lunch Talk: Colloquium Committee (talks_replace2@_asiaa.sinica.edu.tw)
  • Tech Lunch Talk: Chang, Hsiao-Wen (hwchang_replace2@_asiaa.sinica.edu.tw)
NEXT Lunch Talk: 2020-07-20 Mon 12:15~13:15 [R1203]
Speaker:Daniel Harsono
Topic:Preparing the ingredients of planet-forming disks
Abstract:Accretion disks are a common structure in the universe. Young stars grow by accreting the material from the disk that also forms planets. Only in recent years that it is possible to study the detailed structure of these young disks. Yet, it is still not fully understood how disks form around young protostars. By comparing the observed dust and gas structures to numerical models, it might give insights to how the material is transported from the early stages of star formation to the young planet-forming disk. In order to obtain a more complete picture, the dust, gas and ice composition of the young disk is compared with meteorites. The history and physics of star formation can be better understood by knowing the ingredients (dust, ice and gas) of the young disk.
No. Time/Place Speaker Topic (Abstract)
download PDF: dowaload talk PDF file
12020-08-17 Mon
12:15~13:15
R1203
Howard Chen
[Northwestern University]
Influence of Stellar Flares and X-ray Radiation on the Atmospheres of Planets Orbiting M-dwarf Stars
22020-08-05 Wed
12:00~13:00
R1203
Chang, Yen-Pin
[ASIAA]
TBD
32020-07-27 Mon
12:15~13:15
R1203
Cheng Chen
[UNLV]
42020-07-22 Wed
12:00~13:00
R1203
Wang, Chun-Lun
[ASIAA]
TBD
52020-07-20 Mon
12:15~13:15
R1203
Daniel Harsono
[ASIAA]
Preparing the ingredients of planet-forming disks
Abstract

Accretion disks are a common structure in the universe. Young stars grow by accreting the material from the disk that also forms planets. Only in recent years that it is possible to study the detailed structure of these young disks. Yet, it is still not fully understood how disks form around young protostars. By comparing the observed dust and gas structures to numerical models, it might give insights to how the material is transported from the early stages of star formation to the young planet-forming disk. In order to obtain a more complete picture, the dust, gas and ice composition of the young disk is compared with meteorites. The history and physics of star formation can be better understood by knowing the ingredients (dust, ice and gas) of the young disk.

62020-07-08 Wed
12:00~13:00
R1203
Cheng, Jen-Chieh
[ASIAA]
YTLA IF/LO module 檢測與維修
72020-06-24 Wed
12:00~13:00
R1203
Chien, Chen
[ASIAA]
eQ receiver design and simulation.
82020-06-22 Mon
12:15~13:15
R1203
Shiang-Yu Wang
[ASIAA]
The opportunity for science payloads in Taiwanese satellites in the next decade
92020-06-10 Wed
12:00~13:00
R1203
Chen, Hsin-Yo
[ASIAA]
Develop the positional structure of mounting interface in Metis.
102020-05-27 Wed
12:30~13:00
R1203
Yen, Sheng-Feng
[ASIAA]
"Observation at Summit? or at Home " 在家?還是在山頂觀測?
Abstract

夏威夷大島茂納凱亞火山(Mauna Kea)上的天文台群,在過去12月當中,有5個月處於關閉的狀態。去年7-8月期間,新設望遠鏡的爭議及抗議活動達到最高峰,為了確保工作人員的安全,天文台關閉了兩個月。從今年的三月開始,為了防止病毒,也一直關閉至今。 在這演講中,我會快速的說明Mauna Kea 現在的狀況,及我們平時跟關閉時如何操控望遠鏡。

112020-05-18 Mon
12:15~13:15
R1203
Sayantan Auddy
[ASIAA]
122020-04-29 Wed
12:00~13:00
R1203
Yen, Sheng-Feng
[ASIAA]
CANCELLED
132020-04-20 Mon
12:15~13:15
R1203
Hsi-An Pan
[MPIA]
Introduction to PHANGS [CANCELLED]
142020-04-15 Wed
12:00~13:00
R1203
Chien, Chen
[ASIAA]
CANCELLED
152020-04-01 Wed
12:00~13:00
R1203
Fu, Kuo-Chieh
[ASIAA]
CANCELLED
162020-03-18 Wed
12:00~13:00
R1203
Wang, Chao-Ching
[ASIAA]
Application for manual removal and replacement of SMD components.
172020-03-09 Mon
12:15~13:15
R1203
Cristina Romero-Canizales et al.
[ASIAA]
A Tidal Disruption Event in a luminous infrared galaxy
182020-03-04 Wed
12:00~13:00
R1203
Chang, Yin-Chang
[ASIAA]
SUBARU PFI test light source system.
192020-03-02 Mon
12:15~13:15
R1203
Min-Kai Lin
[ASIAA]
Making planets in turbulent disks is not easy
202020-02-24 Mon
12:15~13:15
R1203
Teppei Okumura
[ASIAA]
Intrinsic alignment of galaxy shapes as new dynamic and geometric probes of cosmology
Abstract

Intrinsic alignments (IAs), correlations of galaxy orientations/shapes with surrounding fields such as the mass overdensity, arise due to physical processes during the formation and evolution of galaxies. Thus, investigating IAs in principle enables one to probe galaxy formation and evolution. IAs have been extensively studied also in the context of potential systematic effects in weak-lensing surveys. Besides the two effects above, there is a growing interest of using the galaxy IAs as a tool to extract cosmological information complimentary to galaxy clustering analysis. In a series of recent papers I have developed a comprehensive framework for this purpose: formulation of the IA statistics, investigation of the cosmological information encoded in the IAs, and a forecast study which shows that constraints on cosmological parameters such as dark energy and Hubble parameter can be tighter than those from conventional galaxy clustering analysis alone by a factor of more than 1.5. In this lunch talk I will present a brief overview of these series of work.

212020-02-10 Mon
12:15~13:15
R1203
Chin-Shin Chang
[ALMA]
ALMA data processing overview
Abstract

In this talk, I will give an overview of ALMA data processing status. I will address the issues involved in the past and current cycles, and the efforts we have made to optimize the efficiency of our workflow. There will be time for a discussion session after the talk. Comments and feedbacks from ALMA current and future PIs, as well as ALMA archive users, are most welcome.

222020-02-05 Wed
12:00~13:00
R1203
Chang, Hsiao-Wen
[ASIAA]
Advanced materials development for superconducting mixers.
232020-01-13 Mon
12:15~13:15
R1203
Cheng-Han Hsieh
[Yale]
Rotating N2D+ filament in Orion B: Do cores inherit their angular momentum from their parent filament?
Abstract

Angular momentum is one of the most important physical quantities that govern star formation. The initial angular momentum of cores may be responsible for its fragmentation and can have an influence on the size of the protoplanetary disk. To understand how cores obtain their initial angular momentum, it is important to study the angular momentum of filaments where cores form. While a number of theoretical studies on filament rotation exist, there exist little or no precise specific angular momentum measurements in star-forming filaments. In this talk, I will present high-resolution N2D+ ALMA observations of the LBS23 (HH24-HH26) region in Orion B. Our maps provide one of the most precise and reliable measurements of the specific angular momentum in a star-forming filament. We find values of about 2 to 9 x 10^20 cm^2/s, comparable to the value measured in rotating cores with a size similar to our filament width (~ 0.04 pc) in Orion A. Our results suggest that young cores may inherit their angular momentum from their parent filaments. In addition, if time permits I will share some work and planned observations for the first interstellar comet, Borisov.

TEL: 886-2-3365-2200 FAX: 886-2-2367-7849
General: asiaa_replace2@_asiaa.sinica.edu.tw Media Request: epo_replace2@_asiaa.sinica.edu.tw
11F of AS/NTU Astronomy-Mathematics Building, No.1, Sec. 4, Roosevelt Rd, Taipei 10617, Taiwan, R.O.C.