"how does the stability of technological civilizations affect the probability that they can be detected from Earth? "
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Seminar Detail
Planets Around Other Stars: Exploring Habitability and Spectral Signatures
Presenter: Vikki Meadows
January 23, 2007 02:30 PM Pacific
The search for life outside our Solar System will be undertaken using
remote-sensing techniques to understand the spectroscopic properties of
extrasolar planets. To improve our ability to interpret what we might find,
the Virtual Planetary Laboratory NAI Alumni team uses realistic stellar
spectra and generalized planetary climate-chemistry models to explore the
effect of different stellar energy distributions on the atmospheric
photochemistry and resultant spectra of Earth-like planets.
In this presentation I will review results to date on the effects on
atmospheric photochemistry, planetary habitability and the detectability of
biosignatures for planetary host stars of different spectral type and UV
activity levels. I will also highlight new modeling results relevant to
photosynthesis in extrasolar planet environments, and attempts to generate
"false positive" signatures of atmospheric oxygen, using high incident
stellar UV radiation and model planets with dense carbon dioxide
atmospheres.Participation Instructions
POLYCOM
RSVP to Marco Boldt (Marco.Boldt@nasa.gov) and connect to WebEx as instructed below. If you need Polycom help during the live event, call the videoconferencing help-desk at (650) 604-6412
WebEx
The slides from the seminar can be accessed real-time using WebEx at:
https://nasa.webex.com
Enter the meeting number: 922 684 765 Hit the "join now" button.
Enter your name or site name (this is not an assigned log-in name, please use your institution name or your first and last name), email and the password: meadows123* (case sensitive)
If you've never joined a WebEx meeting before, please allow an extra 5-10 minutes to install the plug-in.
Without a Polycom...
1) You can watch the Realplayer webcast at: http://vanseg-1.arc.nasa.gov/2007/AB070123-01.ram and view the slides in WebEx (see WebEx instructions above) There is a 30 second delay for the webcast, so you will need to control the slides manually using the arrow buttons in WebEx. Questions for the speaker can be posted in the WebEx chat area to be answered at the end of the talk. Do not try to watch the Realplayer webcast at the same time as the Polycom or the phone. Due to the delay in the webcast, it will sound awful, unless you like dissonance.
December 21, 2007
