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#1 | ||
"Richard B. Woods"
Aug 2002
Wisconsin USA
22·3·641 Posts |
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"Instrumental Methods for Professional and Amateur Collaborations in Planetary Astronomy"
abstract at http://arxiv.org/abs/1305.3647 (spacing added below) Quote:
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#2 | ||
Bamboozled!
"๐บ๐๐ท๐ท๐ญ"
May 2003
Down not across
2·73·17 Posts |
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#3 | |
"Richard B. Woods"
Aug 2002
Wisconsin USA
22·3·641 Posts |
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Can you describe the respective amateur and pro roles in ExoMol? ExoMol is a database -- okay, but I don't see any explanation of what any project participant actually does. |
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#4 |
"Vincent"
Apr 2010
Over the rainbow
B4416 Posts |
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As for me, I use planethunters.org.
Hubble look at stars, and the variation of their luminosity. If there is a deip in luminosity, and is regular ( for as short as a few day to 1000+days) then there is a high probability of a *second* body orbiting this star.. which can be a planet or a secondary star. Below is a 'know" binary star: two star orbiting each other, a small star orbit a larger star. The large dip is probably when the smaller star pass in front ( for us) of the larger one, the second dip when it get behind. the lightcurve would change if both stars are of equivalent size. Last fiddled with by firejuggler on 2013-05-21 at 13:13 |
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#5 |
"Richard B. Woods"
Aug 2002
Wisconsin USA
22×3×641 Posts |
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Data from NASA's Kepler space telescope, according to http://www.planethunters.org/science#challenge.
(Kepler is the one that recently suffered a malfunction after four years of observations.) Last fiddled with by cheesehead on 2013-05-21 at 16:40 |
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#6 |
"Vincent"
Apr 2010
Over the rainbow
22·7·103 Posts |
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My bad, Hubble is used for classifying galaxies
https://www.zooniverse.org/ contain several project (including planethunters) ranging from looking for (new) crater on the moon to looking for gravitationnal lenses. If you feel more down to earth there are also other project you can take part of. |
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#7 | |
Bamboozled!
"๐บ๐๐ท๐ท๐ญ"
May 2003
Down not across
1166210 Posts |
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Not trying to teach you egg-sucking techniques but I've no idea of your background in molecular spectroscopy so please forgive me if this comes across as over-patronizing. First off, astronomers aren't that interested in spectroscopy per se but, rather in what spectroscopy can tell them about astronomical objects. Topics of interest include chemical composition, temperature, pressure, chemical reactions, gravity gradients, wind speeds and so on. Molecular spectra can constrain each of these quantities. Spectra as measured in the lab are measured at a particular temperature and pressure by and large. To predict the relative intensities of spectral lines, together with the line widths (Doppler broadening from temperature effects and lifetime shortening {think Heisenberg uncertainty E vs T}, requires theoretical extrapolation from lab measurements. For a particular molecule, the positions of the spectral lines (i.e. the energy separation of pairs of molecular states) depends on the electronic and mechanical properties of the two states in question, including their angular momentum and vibrational "stiffness" of the bonds between the atoms which form the molecule. What I do is take the lab data and attempt to fit it to a theoretical or ad hoc model of the electronic, vibrational and rotational properties. Given that model, it is then possible to predict the spectrum which would be observed under specific conditions of temperature, pressure and so on. So far, I've been working on the AlH molecule which has been observed in sunspots and cool stellar atmospheres. It is expected to be present in "hot Jupiters" too. A further wrinkle is that isotopic variations on the molecules affect the spectrum. (Think: mass differences change moments of inertia and vibrational frequencies.) So I've also analysed lab spectra of AlD and have predicted the specrum of Al-26H. The Al-26 nucleus has a lifetime of around a million years, far too short to have survived on the earth, but plenty of time for the estimated several earth masses produced by a supernova to be incorporated in a near-by planet or star. The gamma radiation from Al-26 decay has been detected in astronomical objects. AFAIK, Al-26 has not been detected in stellar atmospheres but if it were it would be a very interesting pointer to a nearby (few parsec) recent (few tens of kiloyears) supernova. |
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#8 |
Romulan Interpreter
"name field"
Jun 2011
Thailand
3·23·149 Posts |
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+1, good and informing post!
![]() Last fiddled with by LaurV on 2013-05-22 at 04:42 |
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#9 |
"Vincent"
Apr 2010
Over the rainbow
22×7×103 Posts |
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another tidbit of info
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Dedicated software for astronomy. | xilman | Astronomy | 3 | 2017-01-25 10:28 |