::: Sitemap Chinese Version中文 PrintPrint Friendly search help
Activity > Lunch Talk

Lunch Talk (2017)

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: Chou, Chueh-Yi (cychou_replace2@_asiaa.sinica.edu.tw)
NEXT Lunch Talk: 2017-04-10 Mon 12:00~13:00 [R1203]
Speaker:Hsi-An Pan
Topic:TBD
No. Time/Place Speaker Topic (Abstract)
download PDF: dowaload talk PDF file
12017-05-01 Mon
12:00~13:00
R1203
no lunch talk
[ASIAA]
labor day
22017-04-24 Mon
12:00~13:00
R1203
Kota Naito
[ASIAA/NTU]
Statistical Study on Organic Inclusions in Meteorites
32017-04-17 Mon
12:00~13:00
R1203
Min-Kai Lin
[ASIAA]
TBD
42017-04-12 Wed
12:00~13:00
R1203
Chiang, Po-Han
[ASIAA]
52017-04-10 Mon
12:00~13:00
R1203
Hsi-An Pan
[ASIAA]
TBD
62017-03-29 Wed
12:00~13:00
R1203
Chiu, Chuang Ping
[ASIAA]
1.5THz Cartridge System
72017-03-27 Mon
12:00~13:00
R1203
Peter Scicluna
[ASIAA]
Observing mass-loss from evolved massive stars
82017-03-15 Wed
12:00~13:00
R1203
Chueh-Yi Chou
[ASIAA]
PFS fiber probe calibration unit
92017-03-01 Wed
12:00~13:00
R1203
Yen-Bin Chang
[ASIAA]
Fabrication of orthomode transducer for wSMA
102017-02-20 Mon
12:00~13:00
R1203
Kouichi Hirotani
[ASIAA]
Emission from the direct vicinity of black holes
Abstract

In a black hole magnetosphere, when the plasma accretion rate is much lower than the Eddington limit, a strong electric field inevitably appears along the magnetic field lines due to charge deficit. In such a charge-starved region (or a gap), the electric field accelerates migratory electrons and positrons into ultra relativistic energies. These relativistic leptons emit copious gamma-rays via curvature and inverse-Compton (IC) processes. Some of such gamma-rays collide with the submillimeter-IR photons emitted from the radiatively inefficient accretion flow (RIAF) to materialize as pairs. The created pairs polarize to partially screen the original acceleration electric field. By solving this pair-creation cascade self-consistently for the first time, we find that the gap emissions from the direct vicinity of stellar-mass, intermediate-mass, and super-massive black holes are detectable with Fermi/LAT and Imaging Atmospheric Cherenkov Telescopes (e.g., MAGIC, HESS, VERITAS, and CTA) when the accretion rate is in a certain range. Moreover, such HE/VHE gamma-ray fluxes are predicted to exhibit anti-correlation with the RIAF submillimeter fluxes, which enables us to discriminate the gap emission from the standard, shock-in-jet model, e.g., by using ALMA and CTA.

112017-02-15 Wed
12:00~13:00
R1203
Li Chao-Te
[ASIAA]
Millimeter Wave Grating Spectrometer for TIME
122017-02-13 Mon
12:00~13:00
R1203
Youichi Ohyama
[ASIAA]
Proposing to Subaru
132017-02-06 Mon
12:00~13:00
R1203
Ai-Lei Sun
[ASIAA]
Characterizing AGN [OIII] Extended Emission Line Regions with SDSS Images.
142017-01-18 Wed
12:00~13:00
R1203
Chen, Chung-Cheng
[ASIAA]
When Something is Broken...
152017-01-09 Mon
12:00~13:00
R1203
Shiang-Yu Wang
[ASIAA]
the Chinese large optical telescope projects
162017-01-04 Wed
12:00~13:00
R1203
Ling Hung-Hsu
[ASIAA]
Detector quality assurance for astronomy instrumentation
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.