2014ApJ...792....1L


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.31CET12:27:29

2014ApJ...792....1L - Astrophys. J., 792, 1 (2014/September-1)

Understanding the mass-radius relation for sub-neptunes: radius as a proxy for composition.

LOPEZ E.D. and FORTNEY J.J.

Abstract (from CDS):

Transiting planet surveys like Kepler have provided a wealth of information on the distribution of planetary radii, particularly for the new populations of super-Earth- and sub-Neptune-sized planets. In order to aid in the physical interpretation of these radii, we compute model radii for low-mass rocky planets with hydrogen-helium envelopes. We provide model radii for planets 1-20 M, with envelope fractions 0.01%-20%, levels of irradiation 0.1-1000 times Earth's, and ages from 100 Myr to 10 Gyr. In addition we provide simple analytic fits that summarize how radius depends on each of these parameters. Most importantly, we show that at fixed H/He envelope fraction, radii show little dependence on mass for planets with more than ∼1% of their mass in their envelope. Consequently, planetary radius is to a first order a proxy for planetary composition, i.e., H/He envelope fraction, for Neptune- and sub-Neptune-sized planets. We recast the observed mass-radius relationship as a mass-composition relationship and discuss it in light of traditional core accretion theory. We discuss the transition from rocky super-Earths to sub-Neptune planets with large volatile envelopes. We suggest ∼1.75 R as a physically motivated dividing line between these two populations of planets. Finally, we discuss these results in light of the observed radius occurrence distribution found by Kepler.

Abstract Copyright:

Journal keyword(s): planets and satellites: composition - planets and satellites: formation - planets and satellites: interiors - planets and satellites: physical evolution

Simbad objects: 45

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Number of rows : 45

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 HAT-P-19b Pl 00 38 04.0136161838 +34 42 41.552260901           ~ 44 1
2 HAT-P-38b Pl 02 21 31.9802412101 +32 14 46.090818827           ~ 20 2
3 NAME BD-07 436Ab Pl 02 28 37.2275829401 -07 03 38.378689023           ~ 24 1
4 CoRoT-7b Pl 06 43 49.4690410679 -01 03 46.825797768           ~ 357 1
5 NAME LP 424-4b Pl 07 59 05.8395618539 +15 23 29.240025256           ~ 167 1
6 * rho01 Cnc e Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 414 1
7 HD 97658b Pl 11 14 33.1613362847 +25 42 37.391912066           ~ 139 1
8 Ross 905b Pl 11 42 11.0933874353 +26 42 23.658083337           ~ 611 1
9 HAT-P-12b Pl 13 57 33.4668502171 +43 29 36.602501754           ~ 127 1
10 HAT-P-26b Pl 14 12 37.5329989220 +04 03 36.117671696           ~ 103 1
11 WASP-39b Pl 14 29 18.4151765921 -03 26 40.203046112           ~ 95 1
12 HAT-P-18b Pl 17 05 23.1475847690 +33 00 44.939145027           ~ 58 1
13 NAME G 139-21b Pl 17 15 18.9337265994 +04 57 50.064695682           ~ 547 1
14 Kepler-9c Pl 19 02 17.7544105084 +38 24 03.177247136           ~ 83 1
15 Kepler-9b Pl 19 02 17.7544105084 +38 24 03.177247136           ~ 87 1
16 Kepler-4b Pl 19 02 27.6981397378 +50 08 08.703759444           ~ 87 1
17 Kepler-10c Pl 19 02 43.0612302512 +50 14 28.700759378           ~ 101 1
18 Kepler-10b Pl 19 02 43.0612302512 +50 14 28.700759378           ~ 248 1
19 Kepler-20c Pl 19 10 47.5234815840 +42 20 19.299357667           ~ 79 1
20 Kepler-20b Pl 19 10 47.5234815840 +42 20 19.299357667           ~ 87 1
21 BD+48 2893b Pl 19 24 07.7660110490 +49 02 24.928201112           ~ 72 1
22 Kepler-36c Pl 19 25 00.0430855076 +49 13 54.631289830           ~ 92 1
23 Kepler-36b Pl 19 25 00.0430855076 +49 13 54.631289830           ~ 118 1
24 CoRoT-8b Pl 19 26 21.2426686221 +01 25 35.178176730           ~ 47 1
25 Kepler-78b Pl 19 34 58.0139307295 +44 26 53.957326851           ~ 108 1
26 Kepler-35b Pl 19 37 59.2726236478 +46 41 22.952068619           ~ 77 1
27 Kepler-34b Pl 19 45 44.5975310719 +44 38 29.612454271           ~ 83 1
28 Kepler-51b Pl 19 45 55.1429734720 +49 56 15.650638630           ~ 53 1
29 Kepler-11e Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 103 1
30 Kepler-11 Ro* 19 48 27.6228219845 +41 54 32.902654079       14.00   G2V 301 1
31 Kepler-11f Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 113 1
32 Kepler-11d Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 100 1
33 Kepler-11b Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 130 1
34 Kepler-11c Pl 19 48 27.6228219845 +41 54 32.902654079           ~ 94 1
35 BD+47 2936b Pl 19 50 50.2474562793 +48 04 51.097364378           ~ 300 1
36 Kepler-87c Pl 19 51 40.0490992347 +46 57 54.427022288           ~ 34 1
37 Kepler-18c Pl 19 52 19.0688249829 +44 44 46.807526602           ~ 60 1
38 Kepler-18d Pl 19 52 19.0688249829 +44 44 46.807526602           ~ 59 1
39 Kepler-18b Pl 19 52 19.0688249829 +44 44 46.807526602           ~ 62 1
40 Kepler-79e Pl 20 02 04.1057596467 +44 22 53.646600034           ~ 35 1
41 Kepler-79c Pl 20 02 04.1057596467 +44 22 53.646600034           ~ 40 1
42 Kepler-79b Pl 20 02 04.1057596467 +44 22 53.646600034           ~ 39 1
43 Kepler-79d Pl 20 02 04.1057596467 +44 22 53.646600034           ~ 58 1
44 WASP-21b Pl 23 09 58.2534148377 +18 23 45.882492621           ~ 41 1
45 CD-40 15273b Pl 23 51 31.0840161955 -39 54 24.259966546           ~ 50 1

    Equat.    Gal    SGal    Ecl

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2020.10.31-12:27:29

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