2022A&A...661A.101R


Query : 2022A&A...661A.101R

2022A&A...661A.101R - Astronomy and Astrophysics, volume 661A, 101-101 (2022/5-1)

Internal structures and magnetic moments of rocky planets. Application to the first exoplanets discovered by TESS.

RODRIGUEZ-MOZOS J.M. and MOYA A.

Abstract (from CDS):


Context. For a planet to be considered habitable on its surface, it is an important advantage for it to have a magnetic field that protects its atmosphere from stellar winds as well as cosmic rays. The magnetic protection of potentially habitable planets plays a key role in determining the chances of detecting atmospheric biosignatures. In making an estimate of a planet's magnetic field, its internal structure must first be known.
Aims. This study proposes to use the Preliminary Reference Earth Model (PREM) internal structure as the base of a numerical model, as it is considered the best available option for estimating the internal structure of rocky exoplanets. With this model, we estimate the magnetic properties of dry and water-rich Earth-like and Super-Earth-like planets and we apply it to the first 176 planets of this kind confirmed by the Transiting Exoplanet Survey Satellite exoplanet mission (TESS).
Methods. Using PREM as a reference, we estimated the internal structure of dry and water-rich rocky planets. This model provides an estimation of the average density and core size of the planet, which are the key ingredients for estimating its magnetic moment, depending on whether it is tidally locked or not. Our model estimates the thermodynamic variables as a function of pressure and including saltwater as a component of water-rich exoplanets. In addition, we did not use the perfect layer differentiation approximation. We validated our model based on the selection of planets and satellites in the Solar System with similar characteristics.
Results. Using our model, we estimated the internal structure and magnetic moment of selected dry and water-rich rocky planets and satellites in the Solar system. The differences with the observed values in the internal structure characteristics, mass, average density, moment of inertia factor, and local Rossby number are remarkably low or even negligible. The estimated magnetic moments are also very similar to the observed ones. We applied the model to the first dry and water-rich rocky planets confirmed by TESS, 176 in total, and we find, from an astrobiological perspective, that TOI-700 d and TOI-2257 b are the most interesting examples, as they are located in the habitable zone. However, we note that their magnetic moments are only about 0.01 of the Earth's magnetic moment.

Abstract Copyright: © ESO 2022

Journal keyword(s): planets and satellites: fundamental parameters - planets and satellites: interiors - planets and satellites: magnetic fields - planets and satellites: terrestrial planets

Status at CDS : Large table(s) of objects being ingested in VizieR.

Simbad objects: 66

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Number of rows : 66
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 TOI-178.01 Pl? 00 29 12.3030058665 -30 27 13.464930645           ~ 10 0
2 TOI-178.02 Pl? 00 29 12.3030058665 -30 27 13.464930645           ~ 8 0
3 TOI-849b Pl 01 54 51.7039710481 -29 25 18.471127783           ~ 20 0
4 HD 15337c Pl 02 27 28.3781321994 -27 38 06.741716636           ~ 17 0
5 HD 15337b Pl 02 27 28.3781321994 -27 38 06.741716636           ~ 17 0
6 TOI-1062.01 Pl? 02 32 28.4952075520 -78 01 25.734430404           ~ 2 0
7 HD 17926d Pl 02 51 56.2464213292 -30 48 52.259083285           ~ 3 0
8 HD 17926c Pl 02 51 56.2464213292 -30 48 52.259083285           ~ 4 0
9 HD 17926B PM* 02 51 56.4050546448 -30 48 44.196330996           ~ 3 0
10 LHS 1478b Pl? 02 57 18.2591283675 +76 33 11.250290023           ~ 6 0
11 NAME BD-17 588Ab Pl 03 01 51.3928134240 -16 35 36.022281226           ~ 26 0
12 HD 21749b Pl 03 26 59.2228715011 -63 29 56.761818941           ~ 34 0
13 HD 21749c Pl 03 26 59.2228715011 -63 29 56.761818941           ~ 10 0
14 HD 23472c Pl 03 41 50.3991473901 -62 46 01.479574113           ~ 8 0
15 TOI-1634b Pl? 03 45 33.6405088470 +37 06 44.000076950           ~ 7 0
16 CD-38 1467b Pl 04 11 51.9470200783 -37 56 23.219654366           ~ 4 0
17 LHS 1678b Pl? 04 32 42.6349227751 -39 47 12.150012739           ~ 3 0
18 LHS 1678c Pl? 04 32 42.6349227751 -39 47 12.150012739           ~ 3 0
19 NAME L 231-32b Pl 04 33 39.7202257810 -51 57 22.436253190           ~ 18 0
20 TOI-1685b Pl? 04 34 22.4952337563 +43 02 14.689492384           ~ 7 0
21 TOI-540b Pl? 05 05 14.4286982738 -47 56 15.529359543           ~ 8 0
22 TOI-431c Pl? 05 33 04.6005234792 -26 43 28.268361984           ~ 1 0
23 TOI-431.02 Pl? 05 33 04.6006110245 -26 43 28.268281911           ~ 4 0
24 * pi. Men c Pl 05 37 09.8851202601 -80 28 08.831347245           ~ 72 0
25 NAME L 181-1b Pl 06 04 20.3587900219 -55 18 46.838113572           ~ 7 0
26 TOI-700b Pl 06 28 23.2287828000 -65 34 45.521569925           ~ 7 0
27 TOI-700d Pl 06 28 23.2287828000 -65 34 45.521569925           ~ 27 0
28 HD 63433b Pl 07 49 55.0604326704 +27 21 47.458599312           ~ 16 0
29 GJ 3473 b Pl? 08 02 22.8828841960 +03 20 19.692275006           ~ 9 0
30 NAME L 98-59 d Pl 08 18 07.6215096918 -68 18 46.799548510           ~ 27 0
31 NAME L 98-59 b Pl 08 18 07.6215096918 -68 18 46.799548510           ~ 19 0
32 NAME L 98-59 c Pl 08 18 07.6215096918 -68 18 46.799548510           ~ 25 0
33 NAME L 678-39b Pl 09 36 01.6372518187 -21 39 38.878281901           ~ 39 0
34 GJ 367 b Pl 09 44 29.8366584740 -45 46 35.425593490           ~ 6 0
35 TOI-561e Pl? 09 52 44.5490915370 +06 12 58.924328104           ~ 3 0
36 TOI-561b Pl? 09 52 44.5490915370 +06 12 58.924328104           ~ 10 0
37 TOI-561d Pl? 09 52 44.5490915370 +06 12 58.924328104           ~ 6 0
38 HD 86226c Pl? 09 56 29.8441755158 -24 05 57.795793912           ~ 9 0
39 LSPM J1008+6916b Pl 10 08 51.8069671684 +69 16 35.564173019           ~ 13 0
40 NAME G 162-44c Pl 10 18 35.1370942089 -11 43 00.241585751           ~ 16 0
41 NAME G 162-44b Pl 10 18 35.1370942089 -11 43 00.241585751           ~ 19 0
42 TOI-1260b Pl? 10 28 35.0250921216 +65 51 16.381197180           ~ 1 0
43 NAME LP 791-18b Pl 11 02 45.9543871728 -16 24 22.285705785           ~ 11 0
44 TOI-776c Pl? 11 54 18.3919845021 -37 33 09.836167021           ~ 6 0
45 TOI-776b Pl? 11 54 18.3919845021 -37 33 09.836167021           ~ 9 0
46 HD 108236c Pl? 12 26 17.8916070639 -51 21 46.214093526           ~ 6 0
47 HD 108236b Pl? 12 26 17.8916070639 -51 21 46.214093526           ~ 5 0
48 HD 110113b Pl? 12 40 08.7806300020 -44 18 43.267675082           ~ 4 0
49 CD-39 7945b Pl? 12 57 52.4468829347 -39 45 27.706141454           ~ 4 0
50 TOI-2257b Pl? 12 58 57.6814372241 +77 39 41.689594968           ~ 3 0
51 NAME PM J13119+6550c Pl 13 11 59.5602440384 +65 50 01.703495265           ~ 9 0
52 NAME PM J13119+6550b Pl 13 11 59.5602440384 +65 50 01.703495265           ~ 3 0
53 TOI-1807b Pl? 13 25 07.9958636377 +38 55 20.946046779           ~ 6 0
54 NAME SCR J1448-5735b Pl 14 48 39.8123931158 -57 35 17.557700895           ~ 7 0
55 TOI-1749c Pl? 18 50 57.0647942175 +64 25 09.119009331           ~ 2 0
56 TOI-1749d Pl? 18 50 57.0647942175 +64 25 09.119009331           ~ 2 0
57 TOI-1749b Pl? 18 50 57.0647942175 +64 25 09.119009331           ~ 2 0
58 NAME HIP 97166b Pl? 19 44 58.6385661360 +74 03 45.855506952           ~ 4 0
59 TOI-1444b Pl 20 21 53.8352027997 +70 56 37.660030318           ~ 5 0
60 NAME L 210-70b Pl 20 27 42.0813988928 -56 27 25.156653917           ~ 12 0
61 HD 207897b Pl 21 40 44.7824168124 +84 20 00.562939473           ~ 4 0
62 TOI-2285.01 Pl? 22 10 15.1411593128 +58 42 22.259898462           ~ 2 0
63 HD 213885b Pl 22 35 56.3150794527 -59 51 52.075880653           ~ 17 0
64 NAME L 119-213b Pl 22 41 58.1173365142 -69 10 08.320922853           ~ 66 0
65 CD-60 8051b Pl 23 20 07.5245773814 -60 03 54.644541934           ~ 20 0
66 TOI-237b Pl 23 32 58.2699714417 -29 24 54.188809981           ~ 3 0

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2022.09.26-03:01:45

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