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  #61 (permalink)  
Old 06-July-2007, 08:46 PM
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How long will it be these discoveries get covered by science news websites such as ScienceDaily and LiveScience?
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Old 06-July-2007, 09:28 PM
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Originally Posted by Kullat Nunu View Post
New discoveries:
The 2002 record of 34 discoveries is now broken.
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Old 07-July-2007, 07:31 PM
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Hurrah! To secure that record, there are more discoveries to be announced really soon (including two gravitational lensing planets, in the same system)!

I'm not sure if we can say that we're crossing the border when discovering planets becomes a flood as predicted, but the signs suggest so. The major problem among the extrasolar planet science is not only the lack of money (surprise), but also the lack of scientists, instruments, and time. There are so many systems that most systems can't be studied in enough detail.
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Old 07-July-2007, 07:36 PM
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How long will it be these discoveries get covered by science news websites such as ScienceDaily and LiveScience?
Don't hold your breath. Nowadays only the most interesting extrasolar planet discoveries are noticed. Understandably so, as there are so many "ordinary" planets found.
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Old 07-July-2007, 10:28 PM
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Don't hold your breath. Nowadays only the most interesting extrasolar planet discoveries are noticed. Understandably so, as there are so many "ordinary" planets found.
What other websites will be updated with the information? I'm assuming that the extrasolar encyclopedia will be one of them.
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Old 08-July-2007, 12:37 AM
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Yes, and the discoverers' websites are usually up-to-date. You might find some new discoveries at the arXiv.org preprint service. Otherwise, you just have to wait.
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Old 12-July-2007, 09:37 PM
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Some planets announced in the Santorini conference by the Geneva team have been released to public:

*HD 43691 b and HD 132406 b, both orbit metal rich stars
*HD 171028 b, a planet around a metal-poor star
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Old 12-July-2007, 09:42 PM
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The existence of a planet around a star and the star's metallicity is strongly correlated--but only in the case of low-mass stars. A new study suggests that no such correlation exist among giant stars. It is possible that the observed metallicity is not intrinsic, but pollution from protoplanetary disks. When a star expands into a giant, its atmosphere becomes better mixed and the extra metals disappear.
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Old 12-July-2007, 09:44 PM
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A 3-year infrared search of extrasolar planets resulted in zero detections suggesting that super-massive Jovian planets are rare in distant orbits.
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Old 12-July-2007, 09:47 PM
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Conclusive evidence of water vapor in an extrasolar planet's atmosphere (see this thread).
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  #71 (permalink)  
Old 12-July-2007, 11:32 PM
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Originally Posted by Kullat Nunu View Post
A 3-year infrared search of extrasolar planets resulted in zero detections suggesting that super-massive Jovian planets are rare in distant orbits.
That's not good. It might mean that habitable earth-type planets in earth orbits are equally rare.
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  #72 (permalink)  
Old 13-July-2007, 01:12 AM
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Not necessarily. The paper says that almost certainly less than 20% of stars have supermassive Jovians (> 4 Mj) in large orbital distances (20-100 AU).

Which is hardly surprising. In our Solar System, the existence of outer ice giants become problematic if we don't take migration into account. It is hard to see how a far more massive supergiant could form at these distances, except if it is a some sort of sub-brown dwarf instead.

So, no bad news except that it will take longer until new planets can be found using infrared imaging.
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  #73 (permalink)  
Old 13-July-2007, 01:43 AM
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Originally Posted by Kullat Nunu View Post
Not necessarily. The paper says that almost certainly less than 20% of stars have supermassive Jovians (> 4 Mj) in large orbital distances (20-100 AU).

Which is hardly surprising. In our Solar System, the existence of outer ice giants become problematic if we don't take migration into account. It is hard to see how a far more massive supergiant could form at these distances, except if it is a some sort of sub-brown dwarf instead.

So, no bad news except that it will take longer until new planets can be found using infrared imaging.
Oh, okay. I was thinking it was saying that Jupiter type planets in Jupiter type orbits (around 5 au) are rare.
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  #74 (permalink)  
Old 13-July-2007, 03:50 AM
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Which is hardly surprising. In our Solar System, the existence of outer ice giants become problematic if we don't take migration into account.
Is migration of large planets and subsequent merging with inner planets a likely scenario? Perhaps not as I understand they have very weak densities, though I don't know what percent.
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  #75 (permalink)  
Old 13-July-2007, 09:23 AM
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Ooo, now THAT is very interesting. Because as they say, if it really is a Jupiter analogue then it might have rocky planets closer in.
old news there are some already discovered
http://www.extrasolar.net/planettour...al&PlanetID=17
http://www.extrasolar.net/planettour...l&PlanetId=175
http://www.extrasolar.net/planettour...l&PlanetId=192
http://www.extrasolar.net/planettour...l&PlanetID=138
http://www.extrasolar.net/planettour...l&PlanetID=213
http://www.extrasolar.net/planettour...l&PlanetID=214
http://www.extrasolar.net/planettour...l&PlanetId=280
http://www.extrasolar.net/planettour...l&PlanetId=302
http://www.extrasolar.net/planettour...l&PlanetId=201
http://www.extrasolar.net/planettour...l&PlanetId=300
http://www.extrasolar.net/planettour...l&PlanetId=253
http://www.extrasolar.net/planettour...l&PlanetId=199
http://www.extrasolar.net/planettour...l&PlanetId=311

http://www.extrasolar.net/planettour...al&PlanetId=73 that planet was Jupiterlike when it's star was on the main sequence, now it has more Marslike climate but enough to thaw ice on it's moons...

And there is Neptune-like (in climate, not mass) planet inferred in 40 Eri;
http://www.extrasolar.net/planettour...l&PlanetId=236

And this is only from good old EV!

Last edited by m1omg; 13-July-2007 at 09:45 AM..
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  #76 (permalink)  
Old 13-July-2007, 09:46 AM
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Is migration of large planets and subsequent merging with inner planets a likely scenario? Perhaps not as I understand they have very weak densities, though I don't know what percent.
http://www.astronomy.com/asy/default.aspx?c=a&id=5039
Even lifebearing planets may exist in systems with Hot Jupiters...
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  #77 (permalink)  
Old 13-July-2007, 01:13 PM
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http://www.astronomy.com/asy/default.aspx?c=a&id=5039
Even lifebearing planets may exist in systems with Hot Jupiters...
Thanks. They say Earth-like planets form in the wake of migrating gigantic planets. This seems odd.

Quote:
Originally Posted by article
Watercovered, Earth-like planets form in the wake of the giant planets' migration. "Earth-like planets around nearby stars could be more common than we thought," said Sean Raymond, a NASA postdoctoral fellow at the University of Colorado and co-lead author of the study.
What kind of wake are they suppose to leave? Are they not clearing out a path? [Aren't they planets? ]
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Lighten up! This is a stellar board! Author: duh.

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  #78 (permalink)  
Old 13-July-2007, 04:35 PM
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old news there are some already discovered...
All those planets orbit closer than Jupiter and most of them have high eccentricities. A Jovian planet at a distance of our asteroid belt would prevent an Earth-like planet from forming.

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Originally Posted by m1omg View Post
http://www.extrasolar.net/planettour...al&PlanetId=73 that planet was Jupiterlike when it's star was on the main sequence, now it has more Marslike climate but enough to thaw ice on it's moons...
Upsilon Andromedae is still a main sequence star...

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Originally Posted by m1omg View Post
And there is Neptune-like (in climate, not mass) planet inferred in 40 Eri;
http://www.extrasolar.net/planettour...l&PlanetId=236
40 Eridani = Omicron2 Eridani = Keid = the parent star of Vulcanus. You mean Epsilon Eridani.
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  #79 (permalink)  
Old 13-July-2007, 04:40 PM
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Thanks. They say Earth-like planets form in the wake of migrating gigantic planets. This seems odd.
Any large objects already formed would be slingshotted by the incoming gas giant, but gas is transferred more gently from inside the planet's orbit to outside; at the same time the planet loses its orbital energy and falls towards the star. That's the way they migrate.

Terrestrial planets can form after the planet has passed by.

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What kind of wake are they suppose to leave? Are they not clearing out a path?
See the latest systemic blog entry.
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  #80 (permalink)  
Old 13-July-2007, 06:06 PM
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Originally Posted by Kullat Nunu View Post
That almost looks like a galaxy model, too. I would have guessed some sort of scale emergent properties to alter things. Of course, my understanding of it is limited, but I will study it. If you have any references depicting such things, I would enjoy them.

Thanks.
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Lighten up! This is a stellar board! Author: duh.

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  #81 (permalink)  
Old 13-July-2007, 06:16 PM
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That almost looks like a galaxy model, too. I would have guessed some sort of scale emergent properties to alter things.
Well, both are density waves. You can create one by rotating water in a bucket.
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  #82 (permalink)  
Old 13-July-2007, 06:58 PM
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I prefer powdery cream on top of my swirling coffee?
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Lighten up! This is a stellar board! Author: duh.

"The mean of five measures each of which is not worth a dang (sinc), has a maximum value of only five dangs (sinc)". Heber Curtis

"(sinc)" - spelling is not correct (in its orginal form) :)
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Old 13-July-2007, 07:01 PM
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Originally Posted by Kullat Nunu View Post
All those planets orbit closer than Jupiter and most of them have high eccentricities. A Jovian planet at a distance of our asteroid belt would prevent an Earth-like planet from forming.



Upsilon Andromedae is still a main sequence star...



40 Eridani = Omicron2 Eridani = Keid = the parent star of Vulcanus. You mean Epsilon Eridani.
Ups And is a subgiant, class IV , not H burning and definitely not main sequence.
All these planets revolve primarily around late G and K stars which have HZs somewhere between orbit of Venus and Mercury.
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Old 13-July-2007, 09:29 PM
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Well, both are density waves. You can create one by rotating water in a bucket.
How about an actual image announced yesterday (big bucket).
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Lighten up! This is a stellar board! Author: duh.

"The mean of five measures each of which is not worth a dang (sinc), has a maximum value of only five dangs (sinc)". Heber Curtis

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Old 14-July-2007, 02:41 PM
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http://www.extrasolar.net/planettour...l&PlanetId=253
Read;"

HD 70642 b is a good analogue for Jupiter, having similar mass, orbital distance, and circular orbit. These factors increase the chances that this system may harbor Earth-like planets closer to the star."

RLY OL NWS
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Old 14-July-2007, 02:45 PM
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http://en.wikipedia.org/wiki/GJ_317
Two good Jupiters also, both are in the right place to serve as "anti-cometary-defense system" for inner planets.
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Old 14-July-2007, 02:52 PM
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http://www.extrasolar.net/planettour...l&PlanetId=192
...
I listed it before but as I can see you are so ignorant and "sceptical" that you "debunk" it with empty words that all these planets have asteroid belt like orbits...
http://scienceblogs.com/catdynamics/...r_unveiled.php
That newly discovered planet is not FIRST exo-Jupiter.
Right?

http://exoplanet.eu/star.php?st=HD+132406
This planet might have hhabitable moons, it is massive and temperature is relatively good there.
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Old 14-July-2007, 04:10 PM
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36 for the year and counting.
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Lighten up! This is a stellar board! Author: duh.

"The mean of five measures each of which is not worth a dang (sinc), has a maximum value of only five dangs (sinc)". Heber Curtis

"(sinc)" - spelling is not correct (in its orginal form) :)
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Old 14-July-2007, 05:32 PM
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I listed it before but as I can see you are so ignorant and "sceptical" that you "debunk" it with empty words that all these planets have asteroid belt like orbits...
I don't follow. Who are you calling ignorant?

Do you think that makes your words more persuasive?
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Old 14-July-2007, 06:01 PM
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Ups And is a subgiant, class IV , not H burning and definitely not main sequence.
Then why SIMBAD, the Extrasolar Planets Encyclopaedia, and even the Extrasolar Visions list it as F8 V? Being a late F star with the absolute magnitude of ~4 it most certainly is still a main sequence star.

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All these planets revolve primarily around late G and K stars which have HZs somewhere between orbit of Venus and Mercury.
Still, none of them resemble Jupiter as much as HD 154345 b. The planets in 47 UMa system come close, but you can't claim that 14 Her b or Epsilon Eri b are true Jupiter analogs.
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