I checked your link..
The star system referenced is Epsilon Eridanae, and the method used was dust rings..
Present guesses are gas giants anywhere from 5 to 8 times the mass of jupiter in an orbit comparable to that of pluto.. (240 yrs.)
Conclusion:
Not earth type..
You lose..
Ok, I missed the "earth type" in your original post! Actually, no exo-solar earth type planets are yet known.