View Full Version : Extrasolar Atmospheric Spectroscopy
2001-Nov-27, 05:36 PM
This was a really cool use of technology, even without the implications for SETI.
Paul "Search for Experiments of Terrestrial Interest" Unwin
<font size=-1>[ This Message was edited by: Paul Unwin on 2001-11-27 12:37 ]</font>
2001-Nov-27, 06:37 PM
Woah, Too Cool! Actual direct observation and measurements of an extrasolar planet!
Too bad this technique can only be used with planets passing in front of their star, but at least it's something.
I can't wait to hear more about this one.
2001-Nov-27, 07:19 PM
And that planet has an orbit of 3.5 days. That's really zippin'.
2004-Mar-05, 09:30 AM
paper entitled "Theoretical Spectra and Atmospheres of Extrasolar Giant Planets" by Sudarsky, Burrows, and Hubeny (2003, SBH). The astro-ph link to this paper is astro-ph/0210216. The files contain surface spectra and planet/star flux ratios for a subset of the extrasolar giant planets (EGPs) discovered by the radial-velocity technique
The Anglo-Australian Planet Search (AAPS) is a long-term program being carried out on the 3.9m Anglo-Australian Telescope (AAT) to search for giant planets around 200 nearby Solar-type stars with V<7.5. We use the "Doppler wobble" technique to search for these otherwise invisible extra-solar planets, and achieve the highest precision demonstrated by any Southern Hemisphere planet search.
It will also find planets half the size of Earth and upwards, within the star’s habitable zone, as they cross the face of the star.
Eddington is a precision photometer - a device that will measure small changes in the brightness of a celestial object. For example, if Eddington were to observe a swarm of 10 000 fireflies, it would notice if just one of them ‘turned off’.
The planet around 47 UMa was discovered after analysis of eight years of observations at Lick Observatory. Its period is a little over three years (1100 days), its mass about three times that of Jupiter, and its orbital radius about twice the Earth's distance from the Sun. This planet too probably has a region in its atmosphere where the temperature would allow liquid water
Powered by vBulletin® Version 4.2.0 Copyright © 2013 vBulletin Solutions, Inc. All rights reserved.