2016A&A...585L...2S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST21:34:29

2016A&A...585L...2S - Astronomy and Astrophysics, volume 585, L2-2 (2016/1-1)

Energy-limited escape revised. The transition from strong planetary winds to stable thermospheres.

SALZ M., SCHNEIDER P.C., CZESLA S. and SCHMITT J.H.M.M.

Abstract (from CDS):

Gas planets in close proximity to their host stars experience photoevaporative mass loss. The energy-limited escape concept is generally used to derive estimates for the planetary mass-loss rates. Our photoionization hydrodynamics simulations of the thermospheres of hot gas planets show that the energy-limited escape concept is valid only for planets with a gravitational potential lower than log10(-ΦG)<13.11 erg/g because in these planets the radiative energy input is efficiently used to drive the planetary wind. Massive and compact planets with log10(-ΦG)>13.6erg/g exhibit more tightly bound atmospheres in which the complete radiative energy input is re-emitted through hydrogen Lyα and free-free emission. These planets therefore host hydrodynamically stable thermospheres. Between these two extremes the strength of the planetary winds rapidly declines as a result of a decreasing heating efficiency. Small planets undergo enhanced evaporation because they host expanded atmospheres that expose a larger surface to the stellar irradiation. We present scaling laws for the heating efficiency and the expansion radius that depend on the gravitational potential and irradiation level of the planet. The resulting revised energy-limited escape concept can be used to derive estimates for the mass-loss rates of super-Earth-sized planets as well as massive hot Jupiters with hydrogen-dominated atmospheres.

Abstract Copyright:

Journal keyword(s): methods: numerical - hydrodynamics - radiation mechanisms: general - planets and satellites: atmospheres - planets and satellites: dynamical evolution and stability

Simbad objects: 26

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Number of rows : 26

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 NAME BD-07 436Ab Pl 02 28 37.2275829401 -07 03 38.378689023           ~ 22 1
2 WASP-12b Pl 06 30 32.7966788910 +29 40 20.266334158           G0 534 1
3 HAT-P-20b Pl 07 27 39.9487418539 +24 20 11.518276475           ~ 54 1
4 NAME LP 424-4b Pl 07 59 05.8395618539 +15 23 29.240025256           ~ 153 1
5 * rho01 Cnc b Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 228 1
6 * rho01 Cnc e Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 398 1
7 WASP-43b Pl 10 19 38.0089444408 -09 48 22.603103969           ~ 193 1
8 HD 97658b Pl 11 14 33.1613362847 +25 42 37.391912066           ~ 135 1
9 Ross 905 PM* 11 42 11.0933874353 +26 42 23.658083337   12.06 10.613 10.272 8.24 M3V 495 1
10 Ross 905b Pl 11 42 11.0933874353 +26 42 23.658083337           ~ 591 1
11 HD 147506b Pl 16 20 36.3579144486 +41 02 53.109043943           ~ 212 1
12 HD 149026b Pl 16 30 29.6184841164 +38 20 50.310893575           ~ 296 1
13 NAME G 139-21b Pl 17 15 18.9337265994 +04 57 50.064695682           ~ 533 1
14 G 139-21 PM* 17 15 18.9337265994 +04 57 50.064695682   16.40   14.394   M4.5V 237 1
15 CoRoT-2b Pl 19 27 06.4944821296 +01 23 01.357597206           ~ 178 1
16 CoRoT-2 * 19 27 06.4944821296 +01 23 01.357597206   13.422 12.568 12.204 11.49 G7V+K9V 211 2
17 BD+47 2936b Pl 19 50 50.2474562793 +48 04 51.097364378           ~ 284 1
18 HD 189733 BY* 20 00 43.7130382888 +22 42 39.071811263 9.241 8.578 7.648 7.126 6.68 K2V 720 1
19 HD 189733b Pl 20 00 43.7130382888 +22 42 39.071811263           ~ 1082 1
20 WASP-80b Pl 20 12 40.1691752075 -02 08 39.191157456           ~ 53 1
21 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1468 1
22 HD 209458 V* 22 03 10.7729598762 +18 53 03.548248479   8.21 7.63     F9V 994 1
23 WASP-10b Pl 23 15 58.3005497925 +31 27 46.294728182           ~ 89 1
24 WASP-10 V* 23 15 58.3005497925 +31 27 46.294728182   12.4   12.03   K5V 74 1
25 CD-35 16019 PM* 23 59 36.0711854449 -35 01 52.923483315   10.49 9.87 9.91   G6 79 0
26 CD-35 16019b Pl 23 59 36.0711854449 -35 01 52.923483315           ~ 95 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-21:34:29

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