Development of a Galaxy HI observation system for the 8m radio telescope at Misato Observatory SATO Naoko, OKYUDO Masami, et al (Wakayama University), TOYOMASU Shinji et al.(Misato Obs.) HANDA Toshihiro, EBISUZAKI Toshikazu (JAHOU) and Many staff members of many institutes

GHOU1998 The proceedings of the meeting in 98.

Misato 8m radio telescope The photo taken in Feb Since 2005, we are going to develop an HI observation system for Misato 8m radio telescope. --- index Introduction of HI - Our approaches - Our results - summary

What is HI ? We call neutral hydrogen HI (aitch one) We can observe radio emission line radiated from HI. HI line is the first detected cosmic radio emission line. (from the Milky Way (our Galaxy)) The wavelength is 21 cm The frequency is 1.4GHz

HI line spectrum The strength shows a number of HI atoms. The frequency shows velocity of the observed HI atom. (the Doppler effect) Strength frequency

HI observation With HI observation, Dr. Oort have revealed the 2-dimantion map of our Galaxy in Our Galaxy is a disk spiral galaxy An answer to the question Where are we ? One of the greatest topics in 20 th century (Oort, Kerr, & Westerhout 1958) The sun The Galactic center

History of Misato 8m radio telescope -The 8m radio telescope was constructed for the purpose of solar observation at NRO. -The telescope was moved from NRO to Misato at Since 2005, the telescope has developed for the HI observation. -Now, the development is in progress. Nobeyama Radio Observatory ( ) We have gotten the first light spectra of HI line !

The HI spectra The photo taken in Feb Using the Misato 8m radio telescope, we want more people to be interested in radio astronomy.

The photo taken in Feb Our approaches (1) Through the development Accumulation of the knowledge to construct radio telescope We want to develop a reasonable price radio telescope kit for educational activities. Our Target: high school students and teaches science museums The availability: Experience of making a telescope by hand To understand the mechanism of cosmic radio detection Observation of cosmic radio emission with own radio telescope Having a portable radio telescope for demonstration observations

Our approaches (2) Observation with the 8m Observation demonstration in the daylight as outreach activities Observation by high school students to provide hands-on experiences. Observation by students in university to make them science communicators Using observational data Development of educational materials for radio astronomy (ex. Reproduction of Oort work) Publication of raw data and reduction tools on the Web The photo taken in Feb

Our activities (1) Development of cheap telescope kit - Development of 2m telescope by students in university. With the 2m telescope, we also have gotten the HI spectra. We use the 2m as a prototype telescope of the 8m. Using the 2m, we can test devices for 8m. - We are planning to make1m telescope. (cheaper edition)

--- Notation --- The concepts of our telescopes The Misato 8m telescope: for science researchers the advertising tower of our project The 2m radio telescope: for undergraduate/high-school students handmade one with commercially-supplied parts The 1m radio telescope: for many people as cheap as possible

Our activities (2) Outreach activities - Christmas Lecture 2006 in Misato Observatory (with the 8m telescope) - Astronomical class for high-school students in Singu High School at Dec (with the transportable 2m telescope)

Summary -Using the Misato 8m radio telescope, we want more people to be interested in radio astronomy. -The development of HI observation system for the 8m radio telescope is well under way. -Development of 2m and 1m radio telescope is in progress. -We also have held outreach activities. -We have many plans using the 8m telescope. -We would be happy to share the information with many people.

-- Appendix 1 -- Educational radio telescopes in the world (for HI line) 2m telescope, 1m telescope SRT (Small radio telescope) at Haystack Observatory (7foot) Onsala Space Observatory 2-m telescope Misato 8m telescope Forty-foot Telescope at Green Bank observatory 7-m Telescope at Jodrell Bank Observatory © MIT, Haystack Observatory We would be happy to share the information or cooperate with pioneers in HI education. ©BG ©JB

--- Appendix Comparison of the coasts The Misato 8m telescope: 100,000 2m radio telescope:,000 ( 2,000 in future edition) 1m radio telescope: 1,000 Small radio telescope: 7,500 Onsala 2m telescope:??? Forty-foot telescope:??? 7-m Telescope:???