james webb space telescope science updates l.
Skip this Video
Loading SlideShow in 5 Seconds..
James Webb Space Telescope Science Updates PowerPoint Presentation
Download Presentation
James Webb Space Telescope Science Updates

Loading in 2 Seconds...

play fullscreen
1 / 22

James Webb Space Telescope Science Updates - PowerPoint PPT Presentation

  • Uploaded on

JWST-PRES-012898. James Webb Space Telescope Science Updates. John C. Mather JWST Senior Project Scientist NASA’s Goddard Space Flight Center. JWST and related space missions. WMAP 6/30/01 to Sept. 2010: 3.2 – 13 mm; Big Bang HST upgraded! COS and WFC3 - 0.1 to 1.7 µm

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'James Webb Space Telescope Science Updates' - KeelyKia

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
james webb space telescope science updates


James Webb Space Telescope Science Updates

John C. Mather

JWST Senior Project Scientist

NASA’s Goddard Space Flight Center

jwst and related space missions
JWST and related space missions
  • WMAP 6/30/01 to Sept. 2010: 3.2 – 13 mm; Big Bang
  • HST upgraded! COS and WFC3 - 0.1 to 1.7 µm
  • Spitzer: was 3.6 – 180 µm, now 3.6 & 4.5 µm
  • Kepler: launched 3/6 to find transiting Earths
  • Planck launched 5/14: 350 – 10,000 µm; Big Bang
  • Herschel launched 5/14: 60 – 670 µm
  • WISE - launch 11/1/09 - 3.3, 4.7, 12, and 23 μm survey
  • TESS – SMEX proposal for all-sky transiting planet survey – visible/near IR
  • JANUS – SMEX proposal for GRBs to z = 12
  • JDEM/IDECS – study dark energy
  • LISA – study black hole mergers to edge of the Universe

JWST Ottawa

end of the dark ages first light and reionization
End of the dark ages: first light and reionization

… to identify the first luminous sources to form and to determine the ionization history of the early universe.

Hubble Ultra Deep Field

JWST Ottawa

sn 2006 gy brightest supernova
SN 2006 gy – brightest supernova
  • Could be the first observation of a pair-production instability, from the death of a very massive star.
    • Stars are normally held up by the balance of light pressure and gravity
    • Gamma rays producing electron/positron pairs scatters light, reducing pressure. Instability creates runaway collapse.
  • A nearby analog for the first stars in the Universe.

γ e– + e+ γ

  • Progenitor was similar to Eta Carina.

Hubble Image of Eta Carina

JWST Ottawa

pair production sne as first stars
Pair-production SNe as First Stars
  • Good news: JWST can easily detect these when stars first formed (but not as transients).
  • Interesting news: pair-production instability doesn’t necessarily require primordial composition.

JWST Ottawa


Gamma Ray Burst 4/23/09 most distant object yet found

(z = 8.2) – supernova jet aimed at us!

JANUS GRB (SMEX) search proposed, could see to z = 12

JWST Ottawa

when was re ionization


Neutral IGM








Lyman Forest Absorption

Patchy Absorption

Black Gunn-Peterson trough

When was re-ionization?




Fan, Carilli & Keating 2006, ARAA, 44, 415

JWST Ottawa

dark energy
Dark Energy!

MacArthur Fellow 2008 - Adam Riess

S. Perlmutter, A. Riess, B. Schmidt

JWST Ottawa

jwst dark energy dark matter
JWST, Dark Energy, Dark Matter
  • JDEM/IDECS Science Coordinating Group report (Neil Gehrels, GSFC), http://jdem.gsfc.nasa.gov/docs/SCG_Report_final.pdf
  • Problem: determine acceleration parameter now and in the past
  • Multiple techniques required due to likely systematic errors
  • JDEM/IDECS wide-field surveys will find targets for JWST
  • JWST contributes by
    • Measuring very distant supernovae (standard candles?)
    • Measuring effects of dark matter too (distorted images of distant objects, masses of galaxies and clusters out to high redshift, rotation curves, etc.)
    • Cosmic archeology at high redshift (prior to acceleration, formation of galaxies and clusters)

JWST Ottawa


The Eagle Nebulaas seen in the infrared

How does environment affect star-formation and vice-versa?What is the sub-stellar initial mass function?
  • Massive stars produce winds and radiation
    • Either disrupt star formation, or causes it.
  • The boundary between the smallest brown dwarf stars and planets is unknown
    • Different processes? Or continuum?
  • Observations:
    • Survey dark clouds, “elephant trunks” and star-forming regions

The Eagle Nebula as seen by HST

JWST Ottawa

    • As of 13 May, 347 total:
    • Radial velocity: 321 planets, 33 multiple planet systems
    • Transiting: 59 planets, no multiples (most good JWST targets)
    • Microlensing: 8 planets, 1 multiple system
    • Imaging: 11 planets, 1 system (a triple) (all good JWST targets)
    • Timing: 7 planets, 2 multiple planet systems
  • Kepler launched Mar. 6, 2009, will monitor ~ 100,000 stars, find handful of Earths, thousands of others
  • TESS (Transiting Exoplanet Survey Satellite), proposed SMEX, would survey nearest stars, best candidates for detailed follow-up with JWST
  • JWST Transits Working Group established – M. Clampin

JWST Ottawa

planetary systems and the origins of life
Planetary systems and the origins of life

Kalas, Graham and Clampin 2005

JWST Ottawa

images of exoplanets
Images of Exoplanets
  • "It's like a London bus - you've been waiting for one for ages and suddenly four come along at once.” – M. McCaughrean, BBC

JWST Ottawa

  • Advanced Camera for Surveys achieved the optical detection of an exoplanet around a star 25 light years from Earth.
    • First optical detection of a massive planet since Neptune in 1846.
    • Like the discovery of Neptune the existence of Fomalhaut b was predicted in advance by theory.
  • Planet’s mass lies between that of Neptune and Jupiter
    • Constrained by disk dynamics

Named #2 Science Discovery of 2008

planets seen
Planets Seen!

HR 8799 b,c,d

Marois et al. 2008

Gemini & Keck

Massive dust disk as if Mars collided with Earth

β Pictoris b

A.-M. Lagrange et al. 2008


Fomalhaut b

Kalas et al. 2008


JWST Ottawa



  • Planet blocks light from star
  • Visible/NIR light (Hubble/JWST)
  • Radius of planet/star
  • Absorption spectroscopy of planet’s atmosphere
  • JWST: Look for moons, constituents of atmosphere, Earth-like planets with water, weather
  • Star blocks light from planet
  • Mid-Infrared light (Spitzer/JWST)
  • Direct detection of photons from planet
  • Temperature of planet
  • Emission from surface
  • JWST: Atmospheric characteristics, constituents of atmosphere, map planets

JWST Ottawa

dwarf planets and plutoids
Dwarf Planets and Plutoids

May be 2000 more when whole sky is surveyed

With moving object tracking JWST is perfect tool

JWST Ottawa

where they are
Where they are

JWST Ottawa

science working group swg standing panel of science subject matter experts to advise project and hq

Senior Project Scientist

Science Working Group

M. Rieke




G. Rieke

FGS Science Team


MIRI Science Team

NIRCam Science Team

NIRSpec Science Team

Science Working Group (SWG) = Standing panel of science subject matter experts to advise Project and HQ
  • Several SWG and other science team members are here today
  • Many scientists, but only one source of science requirements exist across the JWST Program

JWST Science Requirements


JWST Mission Requirements


JWST Observatory Spec


ISIM Requirements


JWST Ottawa

more info
More Info
  • 600 MB tutorial: Decadal Survey White Papers http://sites.nationalacademies.org/bpa/BPA_050603
  • 7 JWST White Papers submitted:
    • The Scientific Capabilities of the James Webb Space Telescope – Jon Gardner
    • Comparative Planetology: Transiting Exoplanet Science with JWST – Mark Clampin
    • Planetary Systems and Star Formation with JWST – George Rieke
    • Study of Planetary Systems and Solar System Objects with JWST – George Sonneborn
    • Stellar Populations with JWST: the Beginning and the End – Margaret Meixner
    • Galaxies Across Cosmic Time with JWST – Rogier Windhorst
    • First light and reionization : open questions in the post-JWST era – Massimo Stiavelli

JWST Ottawa

more info21
More Info:

Download for free at:


JWST Ottawa



JWST Ottawa