Spectroscopy in HOU A new textbook on spectroscopy

Spectroscopy in HOU -- A new textbook on spectroscopy in astronomy using HOU software Toshihiro Handa (University of Tokyo) Reiko Furusho, Tatsuyuki Arai, Ikuko Harada, Yoshihiro Kakeya, Tetsuya Kawabata, Tomoya Nagai, Osamu Ohshima (JAHOU spectrum curriculum working group)

Spectroscopy in Astronomy • One of the basic concepts in astrophysics. However… Spectroscopy is not familiar to most people. Spectroscopic data can be seen as a image. • Make an image from spectroscopic data! – Just the same as astronomers’ work! • We have a tool to treat an image data! • Let’s use the HOU-IP!!

JAHOU textbook; contents outline • Show minimal concepts to understand spectroscopy in astronomy. • 4 chapters; what can we know about stars through spectroscopy? • 12 sections; usable even for a short term course (often in Japan). • Extendable to whole electromagnetic waves. Some sections are used radio astronomy data.

JAHOU textbook; tools • PC program; HOU-IP – Measure spectra of actual astronomical data • Plot graph (on paper sheet/use PC) – Find a relation • Small experiments; confirm by themselves – Listen sounds with Doppler effect – Watch actual spectra ¨ Experiments are required if the results are beyond their expects

JAHOU textbook; format • 3 parts; like the HOU textbook – Main textbook – Answer sheets – Teachers note • With a table showing relation of concepts – Usage for short term class – As a component of a science course in school ¨ Tightly scheduled course at schools in Japan

JAHOU textbook; contents page • example

Chapters in our textbook • 4 chapters : target concepts – basic ¨color, spectrum, light wave, Doppler effect – chemical composition – physical state; temperature & density – velocity & kinematics

Sections in Chapter 1 • 12 sections : usage for short course • Chapter 1: basic concepts – Color and spectra ¨Based upon our CD-ROM books “space spectrum museum” by Awano et al. – Spectra for various lights – Light as a wave – Doppler effect

Chapter 1 • example

Sections in Chapter 2 • Chapter 2: composition – Spectra of stars (continuum) – Spectra of nebulae (emission lines)

Chapter 2 • example

Sections in Chapter 3 • Chapter 3: physical state – temperature – Spectra of stars

Chapter 3 • example

Sections in Chapter 4 • Chapter 4: velocity and kinematics – Spin of Sun – Rotation of a galaxy – Hubble law – Supernova remnant as an expanding shell

Chapter 4 • example

Future works • Feedback from trial report – Trial use in progress • Add small assistant programs – – Doppler simulator Blackbody radiation viewer Excitation simulator etc. • Translation into other languages – Only in Japanese • Extend to include other topics – Only minimal topics