Focus on the small planets?

View previous topic View next topic Go down

When the number of known planets with a mass below 50 Earth masses become predominant (>50%)?

14% 14% 
[ 1 ]
43% 43% 
[ 3 ]
14% 14% 
[ 1 ]
14% 14% 
[ 1 ]
14% 14% 
[ 1 ]
 
Total Votes : 7

Focus on the small planets?

Post by Borislav on 11th March 2010, 8:11 am

From the latest estimates of the Geneva group became known that the incidence of small planets are several times more than the gas giants - 40-60% versus 13%.
Many projects are aimed precisely at finding smaller planets - HARSP, Keck, APF, AAT, WTS, MEath, COROT, Kepler...
On the other hand there are many projects that will expand the number of known gas giant planets (eg transit hot jupiters) to many thousands - SuperWASP, HAT, MARVELS, GAIA, and photographic projects. In general, extrasolar planetary science, there are two directions - intensive (search for small planets) and extensive (search for gas giants). Which one will prevail?
Now according to the Encyclopedia of the proportion of small planets from 2002 to 2010 increased from 1% to 12%. In 2009, a quarter of all the planets were announced on a small planets! For the micro-lens of the planets that share reaches almost half, but such planets discovered so far too little.

Green color is the world's proven method of radial velocities, the blue is a micro-lens of the
planets.

Borislav
Jovian
Jovian

Number of posts : 561
Registration date : 2008-11-12

View user profile

Back to top Go down

Re: Focus on the small planets?

Post by Borislav on 11th March 2010, 8:19 am

I personally think that the population of small planets will be dominant in the 2021-2025 years, when begin work 20-40 meter ground-based telescopes with new spectrographs (such as CODEX) and to confirm the most planets discovery Kepler and PLATO.

Borislav
Jovian
Jovian

Number of posts : 561
Registration date : 2008-11-12

View user profile

Back to top Go down

Re: Focus on the small planets?

Post by Borislav on 11th March 2010, 8:37 am

In addition - in the Solar System have 6 small planets (Mercury, Venus, Earth, Mars, Uranus and Neptune) vs 2 gas giants (Saturn and Jupiter). I.e. difference in the three times!

Borislav
Jovian
Jovian

Number of posts : 561
Registration date : 2008-11-12

View user profile

Back to top Go down

Re: Focus on the small planets?

Post by Sirius_Alpha on 11th March 2010, 8:43 am

I don't think I'll be alive to see that.
Kepler, CoRoT, Plato, and whoever else are going to find tens of thousands of hot Jupiters. I suspect the RV confirmation won't be able to keep up for small planets.

Edit: At least until a sizable fraction of the hot Jupiters in the Galaxy are found. And then when it's simply easier to detect the faint RV signature of a sub-Jovian around a nearby star than to detect the scattered low S/N ratio RV signature of a hot Jupiter around a distant, dimmer star.

_________________
Caps Lock: Cruise control for 'Cool'!
avatar
Sirius_Alpha
Admin
Admin

Number of posts : 3494
Location : Earth
Registration date : 2008-04-06

View user profile http://solar-flux.forumandco.com/

Back to top Go down

Re: Focus on the small planets?

Post by Borislav on 11th March 2010, 9:10 am

Sirius_Alpha wrote:Edit: At least until a sizable fraction of the hot Jupiters in the Galaxy are found.

http://fr.arxiv.org/abs/0910.2887
We used data of the Tycho catalog for about 1 million objects to locate all the stars with 0m < m_V < 11.5m on the celestial plane. The sky-integrated magnitude distribution predicts 20 Hot Jupiter transits with orbital periods between 1.5 d and 50 d and m_V < 8m, of which two are currently known. In total, we expect 3412 Hot Jupiter transits to occur in front of MS stars within the given magnitude range.

We know a few percent of that number of hot jupiters with bright stars. In the coming years, projects SuperWASP and HAT discover hundreds of hot jupiters.

So it is more correct to ask a question, astronomers will be sought to confirm the small or large planet? Seeking an intensive or extensive way?

Borislav
Jovian
Jovian

Number of posts : 561
Registration date : 2008-11-12

View user profile

Back to top Go down

Re: Focus on the small planets?

Post by Sunchaser on 24th December 2011, 10:14 am

I think it more likely the focus of the search will be on the smaller planets. Human ego dictates looking for an Earth-analogue. This has been a goal for decades, if not centuries (think Bruno.)

-M-
avatar
Sunchaser
Planetesimal
Planetesimal

Number of posts : 133
Age : 46
Registration date : 2011-12-23

View user profile

Back to top Go down

Re: Focus on the small planets?

Post by Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum