射電天體物理學第二輯

phonon

你知不知跟天文有關的諾貝爾物理學獎有多少個？而當中又有多少個跟射電天文有關？射電天文又有幾前沿，促使大部分與天文有關的諾奬都跟射電天文拉上關係？

由2月3日起，梁振聲會繼續帶領理論天文組一起研習射電天體物理學，歡迎有興趣的朋友參加。（如欲要有關參考書的資料，請電郵至　phononm1@yahoo.com）

有關研習內容如下：

1. 射電天體物理基礎
2. 射電望遠鏡
3. 連續譜輻射機制
4. 譜線輻射機制
  

1.  射電天體物理基礎
2. 基礎天線理讑
•Electromagnetic potentials
•Green’s function for the wave equation
•The Hertz Dipole
•The reciprocity theorem
•Descriptive antenna paramters
–The power pattern
–The definition of the main beam
–The effective aperture
–The concept of antenna temperature

3.  連續譜輻射機制 Emission Mechanisms of Continuous Radiation
•The Nature of Radio Sources
•Radiation from an Accelerated Electron
•The Frequency Distribution of Bremsstrahlung for an Individual Encounter
•The
•The Synchrotron RadiationRadiation of an Ionized Gas Cloud
•Nonthermal Radiation Mechanisms
•Review of the Lorentz Transformation  of a Single Electron
•The Spectrum and Polarization of Synchrotron Radiation
•The Spectral Distribution of Synchrotron Radiation
•Energy Requirements of Synchrotron Sources
•Low-Energy Cutoffs in Nonthermal Sources
•Inverse Compton Scattering

4. 綜合孔徑理論


題 目：射電天體物理基礎
主 持：  梁振聲
日 期： 2010年2月3日 (星期三)
時 間： 7:00 p.m. – 8:30 p.m.
地 點：  香港天文學會辦事處 (九龍牛頭角創業街36號 華基中心610 室 )
費 用：  港幣十元 (作學會辦事處日常運作開支，如水電費等。)
參加辦法：    請以電郵 phononm1@yahoo. com 或　hkas_tag@yahoogroups.com


理論天文組是香港天文學會轄下的學術小組，自1989年成立至今，無論是學會之會員或非會員都歡迎加入。小組約每兩星期聚會一次，討論的題目廣泛，主要利用一些與天體物理有關的參考書和論文作為研習題目，如恆星演化、廣義相對論、黑洞、優雅的宇宙等。為了讓組員對所討論之題目更深入了解，本組鼓勵組員自行分配題目並輪流負責介紹所定下的討論題目。

注：
由於本組的聚會有可能因天雨關係或講者臨時有要事未能出席而要更改聚會日期，建議有興趣的朋友先登記入理論天文組的電郵組 (http://tech.groups.yahoo.com/group/hkas_tag)，以取最新的活動消息。

phonon

Dear all,

This notice reminds you next TAG meeting will be dated on 24th Feb., 2010. Leung Chun Sing will continous the second part of Radio astronomy.

Thanks your attention.

phonon

Dear all,

This notice reminds you the coming TAG meeting will be dated on 10th March,  2010 (Wednesday). Leung Chun Sing and Simon will continous the topics of Radio Astronomy. All interested parties are welcome to join us.

Thanks your attention.

phonon

Dear all,

This notice reminds you the coming TAG meeting will be dated on 24th March,  2010 (Wednesday). Leung Chun Sing will continous the topics of Radio Astronomy. All interested parties are welcome to join us.

Thanks your attention.

phonon

Dear all,

Here is the reminder that the coming TAG meeting will be dated on 14th April, 2010 (Wednesday). Leung Chun Sing will continous the topic of radio astronomy. We welcome those interested parties to join us.

Thanks your notice.

phonon

Dear all,

Here is a reminder that the coming TAG meeting will be dated on 28th April, 2010 (Wednesday). Leung Chun Sing will continous the topic of radio astronomy. We welcome those interested parties to join us.

Thanks your notice.

phonon

Dear all,

Here is a reminder that the coming TAG meeting will be dated on 19th May, 2010 (Wednesday). Leung Chun Sing will continous the topic of radio astronomy. We welcome those interested parties to join us.

Thanks your notice.

phonon

Dear all,

Here is a reminder that next TAG meeting will be dated on 23rd June, 2010. Leung Chun Sing will continous the topic of radio astronomy.

Thanks your notice.

phonon

Dear all,

Here is a reminder that next TAG meeting will be dated on 7th July, 2010. Leung Chun Sing will continous the topic of radio astronomy.

Thanks your notice.