Possible planet in the 40 Eridani system

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Possible planet in the 40 Eridani system

Post by Borislav on 21st August 2017, 11:14 am

https://sites.psu.edu/eprv2017/files/2017/03/EPRV_III_Program-2hk96fs.pdf

Matias Diaz
Disentanging doppler signal and stellar activity: the case of HD 26965.

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Re: Possible planet in the 40 Eridani system

Post by Borislav on 21st August 2017, 11:15 am

minimum mass 8.10 mass Earth
orbital period 42.37 days
data from HIRES, PFS, CHIRON and HARPS over a timespan of 15 years.

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Re: Possible planet in the 40 Eridani system

Post by Lazarus on 22nd August 2017, 4:42 am

We report the discovery of a radial velocity (RV) signal that could be interpreted as a planet candidate orbiting the bright, metal-poor K dwarf HD26965, with an orbital period of 42.37 days, or alternatively, as the presence of residual, uncorrected rotational activity in the data. We will show why the latter is favored and makes this dataset an excellent test case for building new correlated noise models to remove the effects due to magnetic activity on Doppler measurements.
(emphasis mine)

Not going to get too excited about this one until more data becomes available.
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Re: Possible planet in the 40 Eridani system

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