Table 2
Comparison of the fraction of stars with planets (Fh) for periods shorter than 50 days from various works.
| 3–10 M⊕ | 10–30 M⊕ | |
|---|---|---|
| Howard et al. (2010) | 0.12 ± 0.04 | 0.07 ± 0.03 |
| Mayor et al. (2011) | 0.17 ± 0.04 | 0.11 ± 0.02 |
| This work(a) | 0.13 ± 0.02 | 0.10 ± 0.02 |
| This work(b) | 0.11 ± 0.03 | 0.08 ± 0.02 |
| This work(c) | 0.10 ± 0.02 | 0.06 ± 0.01 |
Notes. (a) Based on a HARPS volume-limited sample by Sousa et al. (2008). Occurrence-rate estimate is based on the IDEM method used both in Howard et al. (2010) and Mayor et al. (2011). (b)Based on a HARPS volume-limited sample by Sousa et al. (2008). Occurrence-rate estimate is based on the SBM method. (c) Based on our sample of 693 stars. Occurrence-rate estimate is based on the SBM method.
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