Development of a Galaxy HI observation system for the 8m radio telescope at Misato Observatory SATO Naoko, OKYUDO Masami, et al (Wakayama University),

Development of a Galaxy HI observation system for

the 8m radio telescopeat 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 　

GHOU1998The proceedings of the meeting in 98’.

Misato 8m radio telescope

The photo taken in Feb. 2007.

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)

Str

engt

h

frequency

HI observation

With HI observation,

Dr. Oort have revealed

the 2-dimantion map of

our Galaxy in 1985.

Our Galaxy is a disk spiral galaxy

An answer to the question

“Where are we ?”

One of the greatest topics

in 20th 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 1998.

- Since 2005, the telescope has developed for the HI observation.

- Now, the development is in progress.

Nobeyama Radio Observatory(1977 - 1994)

We have gotten the first light spectra of HI line !

The HI spectra

The photo taken in Feb. 2007.

Using the Misato 8m radio telescope, we want more people to be

interested in radio astronomy.

The photo taken in Feb. 2007.

Our approaches (1)■ 　 Through the development→ 　 Accumulation of the knowledge to construct radio telescopeWe want to develop a reasonable price radio telescope kit for educational activities. Our Target: ・ high school students and teaches ・ science museumsThe 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. 2007.

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 studentshandmade one with commercially-supplied parts

• The 1m radio telescope:for many peopleas 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. 2006

(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 sharethe information or cooperate

with pioneers in HI education.

©BG

©JB

--- Appendix 2 ---Comparison of the coasts

• The Misato 8m telescope: 　＄ 100,000

• 2m radio telescope: ＄４ ,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: ???