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Post date: Oct 29, 2011 1:14:50 PM
Here we show a simple statistical comparison of data for confirmed exoplanets (exoplanet.eu) and Kepler candidates (Borucki et al., 2011). This analysis was done as a quality test of the data from both sources for the Habitable Exoplanets Catalog (HEC). In this process we identified missing data and corrected a few errors in both datasets. Figure 1 shows histograms for each compared planetary parameter and Table 1 shows more details, including stellar properties. Kepler candidates were corrected as described by Muirhead et al. (2011). A discussions about this comparison will be addressed in the HEC paper.
Figure 1. Histograms comparing planetary mass, radius, period, semi-major axis, mean distance, eccentricity, inclination, and equilibrium temperature for 695 confirmed exoplanets (red) and 1235 Kepler candidates (green). There is no mass data for the Kepler candidates.
Table 1. Comparison of the minimum, mean, and maximum value for planetary mass, radius, period, semi-major axis, mean distance, eccentricity, inclination, and equilibrium temperature for 695 confirmed exoplanets and 1235 Kepler candidates. The count column shows how much data for each parameter is available. Note: The stellar results are slightly weighted by the multiple planetary systems, there are only 571 stars in the confirmed exoplanets sample and 997 in the Kepler candidates.
Confirmed Exolanets (exoplanet.eu): 695
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Property MIN AVG MAX Count
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Planet Mass (EU): 0.02 893.26 9851.80 689
Planet Radius (EU): 1.42 12.18 24.66 193
Planet Period (days): 0.09 2795.44 730000.00 672
Planet Semi-Major Axis (AU): 0.0004 16.8559 2500.0000 658
Planet Distance: 0.0004 1.4222 114.3021 602
Planet Eccentricity: 0.00 0.20 0.97 611
Planet Inclination: 1.00 76.48 90.00 202
Planet Temperature: 47.52 719.42 2451.50 435
Star Mass (SU): 0.02 1.08 4.50 611
Star Radius (SU): 0.21 2.58 50.39 471
Star Temperature (K): 540.00 5496.02 29300.00 553
Star Luminosity (SU): 0.0030 10.0239 332.3029 455
Star Distance (pc): 3.20 261.44 8500.00 621
Star RA: 0.00 11.81 24.00 695
Star Dec: -83.77 -4.18 79.23 695
Star Magnitude: 1.25 8.54 17.36 410
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Confirmed Exoplanets Corrections
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Corrected 1 times: HD 85512 b
Corrected 1 times: Kepler-16 (AB) b
Corrected 1 times: Kepler-9 d
Corrected 4 times: KOI-730
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Kepler Exoplanets Candidates (Borucki et al., 2011): 1235
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Property MIN AVG MAX Count
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Planet Mass (EU): -- -- -- --
Planet Radius (EU): 0.51 4.07 60.10 1233
Planet Period (days): 0.37 35.02 10389.00 1235
Planet Semi-Major Axis (AU): 0.0100 0.1499 9.5140 1235
Planet Distance: 0.0100 0.1499 9.5140 1235
Planet Eccentricity: 0.00 0.00 0.00 1235
Planet Inclination: 90.00 90.00 90.00 1235
Planet Temperature: 84.00 777.13 3257.00 1233
Star Mass (SU): 0.16 0.99 1.84 1195
Star Radius (SU): 0.18 0.97 6.16 1195
Star Temperature (K): 3200.00 5460.66 9034.00 1195
Star Luminosity (SU): 0.0034 1.1018 32.7378 1194
Star Distance (pc): 10.70 645.30 1528.65 1234
Star RA: 18.71 19.41 20.08 1235
Star Dec: 36.58 44.17 52.15 1235
Star Magnitude: 8.22 14.28 16.42 1235
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Kepler Exoplanets Candidates Corrections
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Correted Candidates (Muirhead et al., 2011): 121
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