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(Radio) Astronomy in Taiwan Jeremy Lim Institute of Astronomy & Astrophysics, Academia Sinica (ASIAA), Taiwan Taiwan (22.5 million) Malaysia (23 million)

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Presentation on theme: "(Radio) Astronomy in Taiwan Jeremy Lim Institute of Astronomy & Astrophysics, Academia Sinica (ASIAA), Taiwan Taiwan (22.5 million) Malaysia (23 million)"— Presentation transcript:

1 (Radio) Astronomy in Taiwan Jeremy Lim Institute of Astronomy & Astrophysics, Academia Sinica (ASIAA), Taiwan Taiwan (22.5 million) Malaysia (23 million)

2 Why do Astronomy? Forefront Scientific Research  No secrets - Universe available to All  Friendly Community: Free (competitive) access to forefront Telescopes Collaborations to build up Research or Instruments/Telescopes  Funding Agencies – Academia Sinica, National Science Council, Ministry of Education Improving Science and Technology  Graduate Education (Astrophysics, Mathematics, Engineering, Computers, …)  Technology transfer to Industry Public Support  Strong Public interest, and stimulates Education

3 Growth of Astronomy in Taiwan ASIAA established (1993) “Story of Astronomy in Taiwan (so far) is very much the story of ASIAA” 198019902000

4  Graduate Institute of Astronomy, National Central University (NCU), Chung-Li(9 faculty, ~20 Masters, ~5 PhD, ~2 postdocs)  Institute of Astronomy & Astrophysics, Academia Sinica, Taipei (NTU) (10 faculty, ~17 postdocs, ~20 technical, ~15 assistants, ~15 students)  Institute of Astrophysics, National Taiwan University (NTU), Taipei (3 faculty, a few students)  Institute of Astronomy, National Tsing-Hua University (NTHU), Tsing-Hua(2 faculty, a few students)  Theoretical Institute for Advanced Research in Astrophysics (TIARA), NTHU-AS initiative (temporarily at ASIAA)  Astronomers on faculty in other University departments Main Astronomy/Astrophysics Institutes/Departments

5 Main Telescope Research Projects Radio Telescopes  Sub-Millimeter Array (SMA) on Mauna Kea, Hawaii (USA-Taiwan), commissioned  Array for Microwave Background Anisotropy (AMiBA) on Mauna Loa, Hawaii (Taiwan, Australia, USA, Canada), under construction  Atacama Large Millimeter Array (ALMA) on Atacama, Chile (USA, Europe, Japan), under negotiation with Japan Optical Telescopes  Taiwan-American-Occultation Survey (TAOS) on Lulin mountain, Taiwan (Taiwan-USA, Korea), under construction  WIRCam for CFHT (3.6 m) on Mauna Kea, Hawaii (Canada, France, USA, Korea, Taiwan), under construction “Builder, not just user”

6  Partnership between Smithsonian Astrophysical Observatory (SAO) and ASIAA  Eight 6-meter antennas located at Mauna Kea, Hawaii (altitude 4080 m)  2 antennas constructed by ASIAA – increases number of baselines from 15 to 28! The Sub-Millimeter Array (SMA) − Overview

7  Partnership between Smithsonian Astrophysical Observatory (SAO) and ASIAA  Eight 6-meter antennas located at Mauna Kea, Hawaii (altitude 4080 m)  2 antennas constructed by ASIAA – increases number of baselines from 15 to 28! The Sub-Millimeter Array (SMA) − Overview Hangar for Assembly Control Room

8  Receivers at 1.3 mm (270 GHz), 0.8 mm (345 GHz), and 0.4 mm (690 GHz) The Sub-Millimeter Array (SMA) − Operating Bands

9  Constructed and Assembled in Taiwan in partnership with Industry  Mount constructed by China Shipbuilding Company (CSBC) in Keelung The Sub-Millimeter Array (SMA) − Mount & Reflector

10  Constructed and Assembled in Taiwan in partnership with Industry  Carbon-Fiber Reinforced Plastic Tubes for Reflector Backup Structure constructed by NITE in Taichung The Sub-Millimeter Array (SMA) − Mount & Reflector

11  Constructed and Assembled in Taiwan in partnership with Industry  Antenna Mechanical/Electrical Assembly by Aeronautic Research Laboratory (ARL) in Taichung The Sub-Millimeter Array (SMA) − Mount & Reflector

12  Establishment of a Receiver Laboratory at ASIAA  All Receiver Systems assembled/tested by ASIAA Receiver Laboratory The Sub-Millimeter Array (SMA) − Receiver Systems

13  Developing expertise to make Low-Noise Junctions for Receivers  690 GHz SiS (Nb/SiO 2 ) junction fabricated at ASIAA and National Tsing-Hua University (NTHU) The Sub-Millimeter Array (SMA) − Junctions

14  Array commissioned in November 2003  Science Programs: Studies of Star Formation, Evolved Stars, External Galaxies,... The Sub-Millimeter Array (SMA) − Science

15  Array commissioned in November 2003  Science Program: Molecular Gas in Messier 51 (a nearby active galaxy) The Sub-Millimeter Array (SMA) − Science SMA: 12 CO (2-1)

16  Array commissioned in November 2003  Science Program: Motion of Molecular Gas in M51 The Sub-Millimeter Array (SMA) − Science SMA: 12 CO (2-1)

17  Array commissioned in November 2003  Science Programs: Feeding the Central Supermassive Black Hole in M51 The Sub-Millimeter Array (SMA) − Science 12 CO (1-0) Sakamoto et al. (1999)

18  Array commissioned in November 2003  Science Programs: Feeding the Central Supermassive Black Hole in M51 The Sub-Millimeter Array (SMA) − Science SMA: 12 CO (2-1)

19  Array commissioned in November 2003  Science Programs: Feeding the Central Supermassive Black Hole in M51 The Sub-Millimeter Array (SMA) − Science SMA: 12 CO (3-2)

20  Measure polarization of Cosmic Microwave Background  Search for distant Galaxy Clusters from Sunyaev-Zeldovich effect, as tracer of Large-Scale Structure of the Universe Array for Microwave Background Anisotropy (AMiBA)

21  Measurement of SZ-effect with Owens Valley Radio Observatory Array for Microwave Background Anisotropy (AMiBA) X-ray Contours Radio False-Color X-ray Contours X-ray False-Color X-ray Contours Optical False-Color

22  AMiBA Prototype on Mauna Loa, Hawaii (deployed 2002)  Hardware Testing and Trouble-Shooting, Astronomy Test Observations Array for Microwave Background Anisotropy (AMiBA)

23  AMiBA to be deployed in 2004 (starting with 7 elements) Array for Microwave Background Anisotropy (AMiBA)

24 Taiwan-American-Occultation Survey (TAOS)  Determine size distribution of Kuiper Belt Objects (KBOs) Discovery Images Jewiit & Luu (1993) The Solar System

25 Taiwan-American-Occultation Survey (TAOS)  Technique: Occultation of Background Stars by KBOs

26 Taiwan-American-Occultation Survey (TAOS)  Instrument: Four 20 inch (50 cm) telescopes on Lulin Mountain, Taiwan

27 Taiwan-American-Occultation Survey (TAOS)  Test observation: Occultation of Background Star by a known Asteroid 1 Frame (0.2 s)

28 ASIAA: A Growing Institute  Currently about 70 members  Active Recruitment of Astronomers and Engineers  Positions advertised in Physics Today and Job Register of American Astronomical Society  For more Information, please contact: Jeremy Lim (Chair, Postdoc Committee) jlim@asiaa.sinica.edu.tw Sun Kwok (Director, Executive Committee) kwok@asiaa.sinica.edu.twjlim@asiaa.sinica.edu.tw


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