J/ApJ/760/44 Predicted terrestrial planet abundances (Carter-Bond+, 2012)
The compositional diversity of extrasolar terrestrial planets.
II. Migration simulations.
Carter-Bond J.C., O'Brien D.P., Raymond S.N.
<Astrophys. J. 760, 44 (2012)>
=2012ApJ...760...44C 2012ApJ...760...44C
ADC_Keywords: Abundances ; Stars, double and multiple ; Planets
Keywords: planetary systems; planets and satellites: composition;
planets and satellites: formation
Abstract:
Prior work has found that a variety of terrestrial planetary
compositions are expected to occur within known extrasolar planetary
systems. However, such studies ignored the effects of giant planet
migration, which is thought to be very common in extrasolar systems.
Here we present calculations of the compositions of terrestrial
planets that formed in dynamical simulations incorporating varying
degrees of giant planet migration. We used chemical equilibrium models
of the solid material present in the disks of five known planetary
host stars: the Sun, GJ 777, HD4203, HD19994, and HD213240. Giant
planet migration has a strong effect on the compositions of simulated
terrestrial planets as the migration results in large-scale mixing
between terrestrial planet building blocks that condensed at a range
of temperatures. This mixing acts to (1) increase the typical
abundance of Mg-rich silicates in the terrestrial planets' feeding
zones and thus increase the frequency of planets with Earth-like
compositions compared with simulations with static giant planet
orbits, and (2) drastically increase the efficiency of the delivery of
hydrous phases (water and serpentine) to terrestrial planets and thus
produce waterworlds and/or wet Earths. Our results demonstrate that
although a wide variety of terrestrial planet compositions can still
be produced, planets with Earth-like compositions should be common
within extrasolar planetary systems.
Objects:
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RA (ICRS) DE Designation(s)
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22 31 00.37 -49 25 59.8 HD213240 = HIP 111143
20 03 37.41 +29 53 48.5 GJ777 = GJ 777 A
03 12 46.44 -01 11 46.0 HD19994 = TYC 4708-1423-1
00 44 41.20 +20 26 56.1 HD4203 = TYC 1194-26-1
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 120 485 Predicted bulk elemental abundances for all
simulated extrasolar terrestrial planets
table3.dat 55 97 Predicted water content for all simulated
extrasolar terrestrial planets
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See also:
J/A+A/562/A71 : Abundances of solar neighbourhood dwarfs (Bensby+, 2014)
J/A+A/554/A84 : Abundances of evolved stars (Maldonado+, 2013)
J/A+A/552/A119 : Planet-star and moon-planet interaction (Saur+, 2013)
J/A+A/552/A6 : Abundances of F-G stars (Gonzalez Hernandez+, 2013)
J/A+A/551/A112 : Metallicity-giant planet correlation (Mortier+, 2013)
J/A+A/541/A40 : Metallicity of solar-type stars (Maldonado+, 2012)
J/ApJ/747/35 : HST/WFC3 transit observation of GJ1214b (Berta+, 2012)
J/ApJ/735/41 : Carbon and oxygen abundances in FGK stars (Petigura+, 2011)
J/A+A/536/A71 : Atmospheric parameters of nearby giant stars (Jones+, 2011)
J/ApJ/725/2349 : C/O vs Mg/Si of planetary systems (Delgado Mena+, 2010)
J/ApJ/720/1592 : Abundances of solar analogs with planets (Hernandez+, 2010)
J/ApJ/715/1050 : Predicted abundances for extrasolar planets. I. (Bond+, 2010)
J/ApJ/709/168 : Eccentric orbits in exoplanets (Anglada-Escude+, 2010)
J/A+A/508/L17 : Abundances in solar analogs (Ramirez+, 2009)
J/A+A/497/563 : Chemical abundances of 451 stars (Neves+, 2009)
J/ApJ/646/523 : Exoplanet systems with stellar companions (Raghavan+, 2006)
J/A+A/449/723 : Abundances in atmospheres of stars with planets (Gilli+, 2006)
J/A+A/438/251 : Abundances in stars with giant planets (Beirao+, 2005)
J/A+A/433/185 : Detailed abundance analysis of 102 F,G dwarfs (Bensby+, 2005)
J/A+A/423/683 : Sodium abundances in nearby disk stars (Shi+, 2004)
J/A+A/410/1051 : ELODIE survey for northern exoplanets. II. (Naef+, 2003)
J/A+A/384/879 : Galactic orbits of stars with planets (Barbieri+, 2002)
J/A+A/379/999 : The CORALIE survey for extrasolar planets. VI (Santos+ 2001)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Disk Composition disk type (HD213240, Solar, Gl777,
HD19994 or HD4203)
10- 25 A16 --- Sim Simulation description (G1)
27- 31 F5.3 Mgeo Mass Final mass of the terrestrial planet
33- 38 F6.3 AU a Orbital semi-major axis
40- 43 F4.2 % H Hydrogen abundance (1)
45- 49 F5.2 % Mg Magnesium abundance (1)
51- 55 F5.2 % O Oxygen abundance (1)
57- 60 F4.2 % S Sulfur abundance (1)
62- 66 F5.2 % Fe Iron abundance (1)
68- 72 F5.2 % Al Aluminium abundance (1)
74- 78 F5.2 % Ca Calcium abundance (1)
80- 83 F4.2 % Na Sodium abundance (1)
85- 88 F4.2 % Ni Nickel abundance (1)
90- 93 F4.2 % Cr Chromium abundance (1)
95- 98 F4.2 % P Phosphorus abundance (1)
100-103 F4.2 % Ti Titanium abundance (1)
105-109 F5.2 % Si Silicon abundance (1)
111-114 F4.2 % N Nitrogen abundance (1)
116-120 F5.2 % C Carbon abundance (1)
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Note (1): All abundances are in wt% of the final predicted planet for
all five disk compositions examined. Planet number increases with
increasing distance of the final planet from the host star.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Sim Simulation description (G1)
18- 24 F7.2 --- HD213240 Water content for HD213240 disk composition (1)
26- 32 F7.2 --- Solar Water content for Solar disk composition (1)
34- 40 F7.2 --- Gl777 Water content for Gl777 disk composition (1)
42- 48 F7.2 --- HD19994 Water content for HD19994 disk composition (1)
50- 55 F6.2 --- HD4203 Water content for HD4203 disk composition (1)
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Note (1): All values are in Earth oceans (1.4x1021kg = 2.34x10-4Mgeo)
for all five disk compositions examined. Planet number increases
with increasing distance of the initial embryo from the host star.
Disk compositions are shown in order of increasing C/O value.
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Global notes:
Note (G1): In this study, we selected four unique dynamical situations
in which to examine terrestrial planet formation (see section 2 for
further explanations):
In-situ = Jupiter-mass planet located at 1AU and not migrating,
JD5-1 = Jupiter-mass body migrating from 5AU to 1AU,
JD5-0.25 = Jupiter-mass body migrating from 5AU to 0.25AU
JSD5-0.25 = Jupiter-mass body migrating from 5AU to 0.25AU with an
additional Saturn-mass body stationary at 9.5AU
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History:
* 25-Jul-2014: From electronic version of the journal
* 11-Sep-2014: Fixed "Disk" name in table2 (was "HD212340"
instead of "HD213240")
References:
Bond et al. Paper I. 2010ApJ...715.1050B 2010ApJ...715.1050B Cat. J/ApJ/715/1050
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 25-Jul-2014