EIICHIRO KOMATSU Home Page
「努力は人を裏切らない」上野由岐子、ソフトボール日本代表
「心は技術で補える。悩むのは技術がないからだ」落合博満、中日ドラゴンズ
「下手くそだし、センスないから、 一生懸命頑張ってやらないとあの場に立てないと思ってやってたから、
きっとああいう場に立てたと思います」川澄奈穂美、サッカー日本代表

For the list of typos in Komatsu et al. (2009) [WMAP 5-year paper], please click here. [Last updated: March 8, 2012]

For the list of typos in Komatsu et al. (2011) [WMAP 7-year paper], please click here. [Last updated: May 2, 2012]

Click here to download a note on the WMAP 5-year distance prior including BAO. [Last updated: October 12, 2009]
Click here to download a note on the WMAP 7-year distance prior including BAO. [Last updated: May 29, 2010]

Eiichiro Komatsu
First Pitch! Prize! More Recent Prize! My Academic Tree
こんな活動も大好きです こんなのも 最近はこんな感じです より最近はこんな感じ
Max-Planck-Institut fuer Astrophysik
Karl-Schwarzschild-Str. 1
Postfach 1317
85741 Garching, Germany

contents: [What's New!!] [CV (6/20)] [Research Activities (12/31)] [Publications (8/7)] [Talks (6/27)] [Documents (6/4)]
[News Papers/Magazines/Books (8/19)] [Yoshinoya] [Same Class] [Tips (12/21)] [Links]
[Cosmology Routine Library (CRL) in Fortran (4/25)]

[ astro-ph: new] [ astro-ph: find] [ astro-ph: uploads]

[ADS] [INSPIRE] [HETDEX] [LITEBIRD] [ShinGakujutsu]
[LAMBDA] [Excite]

(Last Updated: August 16, 2012)

PhD party for Masa Shoji at my place, November 21, 2011

"My PhD students, as of November 2011. Back: Hyunbae Park (2nd year), Chi-Ting Chiang (3rd year), Jonathan Ganc (5th year), and Inh Jee (1st year). Front: Myself and Masatoshi Shoji (with the graduation T-shirt on). Photo courtesy of Hyo Jeong Kim."
[Past group photos: 2008, 2009 and 2010]

past pictures


What's New 2012
January 19-22
Munich.
  • 1/19: AUS(2:33pm)-ORD-MUC(9:50am)
  • 1/22: MUC(9:20am)-EWR-AUS(6:19pm)
January 26-28
"Coming Opportunities in Physical Cosmology" Workshop at Arizona State University.
February 23
Colloquium on "Critical Tests of Theory of the Early Universe using the Cosmic Microwave Background" at Texas A&M University. video
March 9-19
Kyoto, Japan.
March 23,24
Cook's Branch. Give a talk on "Squeezed-limit bispectrum, non-Bunch-Davies vacuum, scale-dependent bias, and multi-field consistency relation" (3/23)
April 1-7
Institute for Advanced Study.
  • 4/1: AUS(6:20am)-EWR(10:55am)
  • 4/3: Give a talk on "Hunting for Dark Matter in Anisotropies of the Gamma-ray Sky: Predictions and First Observational Results from Fermi-LAT"

    Abstract: Can we use the Fermi satellite like WMAP? In 2006, S. Ando and I proposed to use anisotropies in the gamma-ray background (not CMB!) as a smoking-gun signature of annihilation of dark matter particles in the universe. The idea is simple: since dark matter traces the large-scale structure of the universe, the emission from dark matter must be anisotropic, and its spatial pattern is predictable. The use of anisotropy (especially the power spectrum) was new to the gamma-ray community, so I teamed up with the Fermi-LAT team to look for this signature. Here, we report on the first detection of anisotropy in the diffuse gamma-ray background measured by Fermi-LAT. We find that the detected signal is very likely due to unresolved blazers. Subtracting this signal, we can place a fairly stringent upper limit on the residual anisotropy signal, which would then put constraints on dark matter properties.

  • 4/7: EWR(5:00pm)-AUS(7:58pm)
April 12-14
"Supernova cosmology and looking to the future" workshop at Cook's Branch. Give a talk on "Hobby-Eberly Telescope Dark Energy Experiment".

Abstract: Hobby-Eberly Dark Energy Experiment (HETDEX) will yield about 800,000 blindly-detected spectra of distant (z=1.9-3.5) galaxies, providing an unprecedented opportunity to measure the large-scale structure of the universe in a high-redshift universe. This unique dataset is expected to improve our understanding of the physics of inflation, the nature of dark matter and dark energy, and the properties of neutrinos. In this talk, I will describe the experiment and discuss cosmological constraints expected from the HETDEX 3-year survey.

April 17-21
Munich and Berlin.
  • 4/17-18: AUS(12:04pm)-IAD-MUC(7:50am)
  • 4/18,19: MPA
  • 4/19: MUC(5:15pm)-TXL(6:20pm)
  • 4/20: Berlin
  • 4/21: TXL(10:10am)-FRA-ORD-AUS(7:44pm)
May 7,8
Texas Cosmology Center Workshop on "Dark Matter Signatures in the Gamma-ray Sky," University of Texas at Austin.
May 14,15
Max-Planck-Institute for Astrophysics-Texas Cosmology Center Workshop on "Near Infrared Background and the Epoch of Reionization," University of Texas at Austin.
May 20-26
Perimeter Institute and CITA.
  • 5/20: AUS(11:10am)-DFW-YYZ(5:45pm)
  • 5/22: Give a talk on "New probes of initial state of quantum fluctuations during inflation" at PI. Video on this presentation is available here.

    Abstract: How did inflation actually happen? Precision measurements of statistical properties of primordial fluctuations generated during inflation offer a direct probe of the physics of inflation. When we calculate statistical properties of primordial fluctuations generated during inflation, we usually assume that the initial state of quantum fluctuations is in a preferred vacuum state called Bunch-Davies vacuum. While there is some motivation for choosing such a state, this is an assumption, and thus needs to be tested by observations. In this talk I will present new probes of initial state of quantum fluctuations during inflation: the 3-point function of the cosmic microwave background anisotropy, the 2-point function of galaxies, and a spectral distortion of the thermal spectrum of the cosmic microwave background.

  • 5/23: Give a talk at 2pm on "Hunting for Dark Matter in Anisotropies of the Gamma-ray Sky: Predictions and First Observational Results from Fermi-LAT" at CITA. Video on this presentation is available here.
  • 5/26: YYZ(3:15pm)-DFW-AUS(7:55pm)
May 31-August 1
Institute for Physics and Mathematics of the Universe (Kashiwa, Chiba, Japan).
  • 5/31-6/1: AUS(6:40am)-IAH-NRT(2:30pm)
  • 6/12-16: Duesseldorf
    • 6/12: NRT(12:05)-MUC-DUS(19:35)
    • 6/15-16: DUS(12:50)-MUC-NRT(10:15)
  • 6/25-29: WKYC 2012 at Korea Astronomy and Space Science Institute (KASI), Daejeon. Give a talk on "New probes of initial state of quantum fluctuations during inflation" on June 25.
    • 6/22: HND(15:30)-ITM(16:35)
    • 6/24: KIX(11:10)-GMP(13:05)
    • 6/28: GMP(12:40)-HND(14:45)
  • 7/5: Visit Univ. of Tokyo. Give a talk on "New probes of initial state of quantum fluctuations during inflation" at 13:30.
  • 7/13: Give a talk at IPMU's ACP seminar on "New probes of initial state of quantum fluctuations during inflation" at 15:30.
  • 7/15-19: Academia Sinica, Taiwan
    • 7/15: HND(10:05)-TSA(12:30)
    • 7/16: Give a colloquium on "Critical Tests of Theory of the Early Universe using the Cosmic Microwave Background"
    • 7/18: Give a talk at LeCosPA on "New probes of initial state of quantum fluctuations during inflation"
    • 7/19: TSA(13:30)-HND(17:45)
  • 7/20: HND(13:30)-ITM(14:35)
  • 7/23: Visit Nagoya University. Give a talk on "New probes of initial state of quantum fluctuations during inflation" at 15:00.
  • 7/24: Visit Tokyo University of Science. Give a talk on "New probes of initial state of quantum fluctuations during inflation" at 16:30.
  • 7/26-27: CMB Symposium at KEK. Give a talk on "赤外背景放射の科学解釈（+Austin研究会報告）".
  • 7/28: Outreach event at IPMU: "現代宇宙論の最前線"

    Abstract: 宇宙はどのように始まり、どのように進化してきたのだろう？宇宙は何からできているのだろう？宇宙に終わりがあるとすれば、どのように終わるのだろう？現代科学の急速な発展により、このような、私たちの起源に関わる基本的な問いに対し、科学的な答えが得られようとしています。この講義では、最新の観測データと 天文学・物理学を駆使して我々が到達した最新の科学的宇宙モデルを解説し、現代宇宙論が明らかにした驚くべき宇宙の姿を紹介します。

  • 8/1: NRT(3:55pm)-IAH-AUS(4:16pm)
June 20
The Gruber Cosmology Prize to the WMAP team!
August 5
Move to Munich!
August 31-September 4
A petit vacation in Paris.
  • 8/31: MUC(14:45)-CDG(16:20)
  • 9/4: CDG(13:10)-MUC(14:35)
September 18-22
"Big Bang, Big Data, Big Computers" (Big3) on the computer science and statistics of contemporary Cosmic Microwave Background data analysis, AstroParticule et Cosmologie (APC) Laboratory at the Paris Rive Gauche Campus of the Universite Paris Diderot
  • 9/18: MUC(15:40)-CDG(17:15)
  • 9/20: Give a talk on "Simple Foreground Cleaning Algorithm for Detecting Primordial B-mode Polarization of the Cosmic Microwave Background" at 17:05 (15+5)

    Abstract: We reconsider the pixel-based, "template" polarized foreground removal method within the context of a next-generation, low-noise, low-resolution (0.5 degree FWHM) space-borne experiment measuring the cosmological B-mode polarization signal in the cosmic microwave background (CMB). This method was put forward by the Wilkinson Microwave Anisotropy Probe (WMAP) team and further studied by Efstathiou et al. We need at least 3 frequency channels: one is used for extracting the CMB signal, whereas the other two are used to estimate the spatial distribution of the polarized dust and synchrotron emission. No external template maps are used. We extract the tensor-to-scalar ratio (r) from simulated sky maps consisting of CMB, noise (2 micro K arcmin), and a foreground model, and find that, even for the simplest 3-frequency configuration with 60, 100, and 240 GHz, the residual bias in r is as small as Delta r~0.002. This bias is dominated by the residual synchrotron emission due to spatial variations of the synchrotron spectral index. With an extended mask with fsky=0.5, the bias is reduced further down to <0.001.

  • 9/22: CDG(11:15)-MUC(12:40)
September 24-28
Astronomische Gesellschaft in Hamburg
  • 9/24: MUC-HAM
  • 9/26: Give a talk on "What has been and what can be learnt from the CMB" (12:25-13:00)
  • 9/28: HAM-MUC
October 8-12
Bonn and Cologne
  • 10/8: Visit Max-Planck-Institut fuer Radioastronomie in Bonn to give a colloquium on "Critical Tests of Theory of the Early Universe using the Cosmic Microwave Background"
  • 10/9-12: From Quantum to Cosmos 5, Cologne
October 17-21
HETDEX collaboration meeting
  • 10/17: MUC(15:30)-EWR(18:30)
  • 10/21-22: EWR(17:35)-MUC(7:40)
November 5-8
A workshop on "Critical Tests of Inflation Using Non-Gaussianity" at MPA.
November 9
Give a colloquium on "Critical Tests of Theory of the Early Universe using the Cosmic Microwave Background" at IAP, Paris
November 18-23
International Workshop at Schloss Ringberg on "Galaxy Cluster Cosmology in the Real and Simulated Universe"
November 26-28
A workshop on "Polarized Foreground for Cosmic Microwave Background" at MPA.
November 30-January TBD
Japan.
What's New 2013
January 17
Give a colloquium at ESO
April 1-June 28
A long-term program on "Primordial Cosmology" at KITP, Santa Barbara, CA
July 1-6
International School of Physics Enrico Fermi on "New Horizons for Observational Cosmology", Varenna, Lake Como, Italy
July 8-12
WKYC 2013 at Korea Astronomy and Space Science Institute (KASI), Daejeon

What's New!! 2011
What's New!! 2010
What's New!! 2009
What's New!! 2008
What's New!! 2007
What's New!! 2006
What's New!! 2005
What's New!! 2004
What's New!! 2003
What's New!! 2002
What's New!! 2001
What's New!! 2000
What's New!! 1999
What's New!! 1998

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e-mail: komatsu [at] mpa-garching [dot] mpg [dot] de
phone: +49-89-30000-2208 [089-30000-2208]
office: 231 (in the MPA building)

Since August 3, 2012