Who will be first to detect Earth-mass planet?

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Which will be first to detect an ~Earth-mass planet?

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Total Votes : 15

Who will be first to detect Earth-mass planet?

Post by Sirius_Alpha on 22nd December 2008, 1:19 am

Not a lot going on, so I decided to ask what everyone thought about what would be the first group to detect an Earth-mass planet.
Transiting/non-transiting, habitable/hellish, doesn't matter. Just as long as it's mass is ~ 1 M_earth.

Edit: With the announcement of Gliese 581 e, I think I should refine "~ 1 M_earth" to be any planet whose mass is between 0.9 M_earth to 1.1 M_earth, as stated in a post after this.


Last edited by Sirius_Alpha on 22nd April 2009, 7:10 pm; edited 2 times in total

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Re: Who will be first to detect Earth-mass planet?

Post by NuclearVacuum on 22nd December 2008, 10:36 am

THE RUSSIANS!!!!!!!!!!

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Re: Who will be first to detect Earth-mass planet?

Post by Lazarus on 22nd December 2008, 1:28 pm

Does this count?
Thus, our discovery of MOA-2007-BLG-192Lb represents the first discovery of an extrasolar planet with a planetary mass ratio orbiting an extremely low-mass primary that is likely to be a brown dwarf, and with a mass of m = 3.3+4.9−1.6 M (or a 2-σ range of 1.018 M)
Sure, the 1 Earth mass case lies at the end of the 2-σ range, but you never know...
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Re: Who will be first to detect Earth-mass planet?

Post by marasama on 22nd December 2008, 2:14 pm

I voted for OGLE, and MOA-2007-BLG-192Lb helps support my thought.

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Re: Who will be first to detect Earth-mass planet?

Post by Sirius_Alpha on 22nd December 2008, 3:27 pm

Haha, I suppose I should have been more accurate. Razz 1 M_earth as in "We're pretty dang confident it's ~1 +/- 0.1 M_earth". I don't quite understand standard deviation enough to phrase it in that context haha.

An interesting note that CoRoT currently has no votes.

NuclearVacuum wrote:THE RUSSIANS!!!!!!!!!!
Do I smell a space race about to start? Razz Laughing

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Re: Who will be first to detect Earth-mass planet?

Post by Edasich on 22nd December 2008, 5:16 pm

NuclearVacuum wrote:THE RUSSIANS!!!!!!!!!!

And why not ITALIANS???? Razz
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Re: Who will be first to detect Earth-mass planet?

Post by ciceron on 31st March 2009, 5:21 pm

I voted for Kepler , but ... Spaniards got a chance from ground observations too Wink

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Re: Who will be first to detect Earth-mass planet?

Post by gremlin66 on 20th April 2009, 3:19 am

so that planet orbiting MOA-2007-BLG-192Lb; any hints on whether or not it's a terrestrial or gas planet? Smile i like the potential in a 3-5 earth mass planet

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Re: Who will be first to detect Earth-mass planet?

Post by Sirius_Alpha on 20th April 2009, 8:51 am

The planet is most likely a terrestrial planet.

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Re: Who will be first to detect Earth-mass planet?

Post by Edasich on 20th April 2009, 9:51 am

But do not expect to find there the little green men. With a brown dwarf host the habitable zone is certainly tight (<<0.1 AUs) so it should be as cold as Uranus or Saturn.
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Re: Who will be first to detect Earth-mass planet?

Post by AVBursch on 1st May 2009, 8:58 am

Who would be the first to detect an Earth-mass extrasolar planet? As far as methods go, I would say Doppler method.

Earth-mass extrasolar planets are already detectable with today's technology. Maybe not around stars like the Sun, but definitely doable around red dwarfs.

Consider Gliese 581e. The mass (or more precisely, the value of m sin i) is 1.9 Mearth. The star, Gliese 581, has a mass of 324 Mjup. Extrapolating from that point, an Earth-mass exoplanet would be detectable, with today's technology and using the doppler method, around a 170 Mjup star in a 0.03 AU orbit. Finding an Earth-mass exoplanet orbiting a star with a mass of 80 Mjup with the doppler method would be trivial with today's technology.

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Re: Who will be first to detect Earth-mass planet?

Post by Sirius_Alpha on 1st May 2009, 11:59 am

Once you get in the mass ranges you're talking about, the stellar host is a brown dwarf and is very dim. There is a problem getting radial velocity data from the star with a sufficiently high signal to noise ratio.

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Re: Who will be first to detect Earth-mass planet?

Post by Dnoces on 1st May 2009, 5:36 pm

I voted CoRoT, I guess because it's had the most luck as far as stuff not around red dwarfs.
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Re: Who will be first to detect Earth-mass planet?

Post by Sirius_Alpha on 17th October 2012, 3:27 pm

Resurrecting this for you-know-why. Wait until true mass is determined or does m sin i suffice?

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