Cosmology
This presentation is the property of its rightful owner.
Sponsored Links
1 / 35

Cosmology PowerPoint PPT Presentation


  • 100 Views
  • Uploaded on
  • Presentation posted in: General

IAAA. I nha A mateur A stronomical A ssociation. Cosmology. 인하대학교 별지기 4 기 연세대학교 천문우주학과 김명진. 전국 대학생 아마추어 천문회 서울지부 세미나. 2006. 12. 2. IAAA. I nha A mateur A stronomical A ssociation. Contents. Historical Background CMB?! 2006 Novel Prize A map of the Universe.

Download Presentation

Cosmology

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Cosmology

IAAA

Inha Amateur Astronomical Association

Cosmology

인하대학교 별지기 4기

연세대학교 천문우주학과

김명진

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Contents

IAAA

Inha Amateur Astronomical Association

Contents

Historical Background

CMB?!

2006 Novel Prize

A map of the Universe

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Historical background

IAAA

Inha Amateur Astronomical Association

Historical Background

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Cosmology

IAAA

Inha Amateur Astronomical Association

현대우주론의 태동

아인슈타인의 상대성 이론 + 허블의 우주의 팽창 관측 = 현대 우주론의 탄생

빅뱅 (대폭발) 우주론 + 급팽창 이론 + 양자역학적 우주 기원론= 현대 우주론

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Cosmology

IAAA

Inha Amateur Astronomical Association

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Edwin hubble

IAAA

Inha Amateur Astronomical Association

Edwin Hubble

  • 윌슨산 100인치 망원경 사용

  • 안드로메다 은하까지의 거리 결정 --> 섬우주

  • 우주의 팽창을 관측적으로 증명 (외부은하의 적색이동 이용)

  • 허블의 은하분류법

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Cosmology

IAAA

Inha Amateur Astronomical Association

안드로메다 은하까지의 거리

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Cosmology

IAAA

Inha Amateur Astronomical Association

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


2006 novel prize

IAAA

Inha Amateur Astronomical Association

2006 Novel Prize

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Before the discovery

IAAA

Inha Amateur Astronomical Association

Before the Discovery

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


The discovery

IAAA

Inha Amateur Astronomical Association

The Discovery

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Cosmology

IAAA

Inha Amateur Astronomical Association


Cosmology

IAAA

Inha Amateur Astronomical Association

“for their discovery of the blackbody form and anisotropy of the cosmic microwave background radiation”

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Why send telescopes into space

IAAA

Inha Amateur Astronomical Association

Why send telescopes into space?

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Where does cmb come from

IAAA

Inha Amateur Astronomical Association

Where does CMB come from?

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Cosmology

IAAA

Inha Amateur Astronomical Association

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Cmb anisotropy from cobe

IAAA

Inha Amateur Astronomical Association

CMB Anisotropy from COBE


Cmb power spectrum

IAAA

Inha Amateur Astronomical Association

CMB Power Spectrum


Fourier transform quick introduction

IAAA

Inha Amateur Astronomical Association

Fourier Transform(Quick Introduction)

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Fourier transform quick introduction1

IAAA

Inha Amateur Astronomical Association

Fourier Transform(Quick Introduction)

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Statistical description of anisotropies

IAAA

Inha Amateur Astronomical Association

Statistical Description of Anisotropies

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Cosmology

IAAA

Inha Amateur Astronomical Association

  • In late 1960s, P. J. E. Peebles realized that the early universe would have contained sound waves

  • When radiation was still trapped by matter, the tightly coupled system of photons, electrons and protons behaved as a single gas

  • Then a small disturbance in gas density would have propagated as a sound wave

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Cosmology

IAAA

Inha Amateur Astronomical Association


Cosmology

IAAA

Inha Amateur Astronomical Association

  • Because inflation produced the density disturbances all at once in essentially the first moment of creation, the phase of all the sound waves were synchronized

  • The sound waves in the early universe was oscillating in time instead of space

  • In this analogy the length of the pipe represent the finite duration when sound waves traveled through the primordial plasma

  • Overtones add richness to the sound i.e. cause small scale fluctuations

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Cmb power spectrum1

IAAA

Inha Amateur Astronomical Association

CMB Power Spectrum

  • The greatest variations at about one degree (l = 220)

  • This peak is evidence of the fundamental wave

  • The subsequent peaks represent the temperature variations caused by the overtones

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Analogous to sound waves

IAAA

Inha Amateur Astronomical Association

Analogous to Sound Waves

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Cmb power spectrum2

IAAA

Inha Amateur Astronomical Association

CMB Power Spectrum

  • The greatest variations at about one degree (l = 220)

  • This peak is evidence of the fundamental wave

  • The subsequent peaks represent the temperature variations caused by the overtones

  • The series of peaks strongly supports the theory that inflation triggered all the sound waves at the same time

  • Sharp drop-off after third peak sound waves with short wavelengths dissipate

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Cosmology

IAAA

Inha Amateur Astronomical Association

  • Baryons and Dark matter in the early universe

  • Both of them supply mass to the primordial gas and enhance the gravitational pull, but only ordinary matter undergoes the sonic compressions and rarefactions

  • At first overtone, gravity is attempting to compress the plasma while gas pressure is trying to expand it.

  • This effect explains why the second peak is lower than the first

  • By measuring the ratios of the heights of the first three peaks, the density of cold dark matter has been determined

2006년 2학기 별지기 세미나

2006. 12. 2


Cosmic microwave background radiation

IAAA

Inha Amateur Astronomical Association

Cosmic Microwave Background Radiation

  • CMB is the remnant heat left over from the Big Bang

  • Evidence for that early universe was smaller, denser and hotter than present

  • Now it is observed as 2.7°K microwave radiation

  • The temperature is almost uniform over the full sky and it is a sign that it comes from a simpler past

  • But it has fluctuations in the 10-5 level which is called ‘CMB anisotropy’

  • CMB anisotropy holds the key to understanding the origin of structure in the universe : how the primordial plasma evolved into galaxies, stars and planets

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


A map of the universe

IAAA

Inha Amateur Astronomical Association

A map of the Universe

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Millennium simulation

IAAA

Inha Amateur Astronomical Association

Millennium Simulation

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Millennium simulation1

IAAA

Inha Amateur Astronomical Association

Millennium Simulation

A 3-dimensional visualization of the Millennium Simulation. The movie shows a journey through the simulated universe. On the way, we visit a rich cluster of galaxies and fly around it. During the two minutes of the movie, we travel a distance for which light would need more than 2.4 billion years.

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


A map of the universe1

IAAA

Inha Amateur Astronomical Association

A map of the Universe

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


Thank you for listening any questions are invited also e mail skarma@galaxy yonsei ac kr

IAAA

Inha Amateur Astronomical Association

Thank youfor listening!!!Any questions are invited also E-mail ^^([email protected])

1999. 4.24 경주 첨성대 – photo by 井

전국 대학생 아마추어 천문회 서울지부 세미나

2006. 12. 2


  • Login