J/A+A/685/A143 Exoplanets parameters (Mamonova+, 2024)
Planets similar in size are dissimilar in interior.
Mamonova E., Shan Y., Hatalova P., Werner S.C.
<Astron. Astrophys. 685, A143 (2024)>
=2024A&A...685A.143M 2024A&A...685A.143M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Stars, masses ;
Stars, diameters ; Binaries, orbits
Keywords: methods: data analysis - methods: statistical -
planets and satellites: composition -
planets and satellites: fundamental parameters
Abstract:
The number of discovered exoplanets now exceeds 5500, allowing
statistical analyses of planetary systems. Multi-planet systems are
mini-laboratories of planet formation and evolution, and analysing
their system architectures can help us to constrain the physics of
these processes. Recent works have found evidence of significant
intrasystem uniformity in planet properties such as radius, mass, and
orbital spacing, collectively termed `peas in a pod' trends. In
particular, correlations in radius and mass have been interpreted as
implying uniformity in planet bulk density and composition within a
system. However, the samples used to assess trends in mass tend to be
small and biased. In this paper, we re-evaluate correlations in planet
properties in a large sample of systems with at least two planets for
which mass and radius have been directly measured, and therefore bulk
density can be calculated. Our sample was assembled using the most
up-to-date exoplanet catalogue data, and we compute the relevant
statistics while using a procedure to 'weight' the data points
according to measurement precision. We find a moderate correlation in
radius and a weak correlation in the densities of adjacent planets.
However, masses of neighbouring planets show no overall correlation in
our main sample and a weak correlation among pairs of planets similar
in size or pairs restricted to Mp<100M⊕, Rp<10R⊕.
Similarly, we show that the intrasystem dispersion in radius is
typically less than that in mass and density. We identify ranges in
stellar host properties that correlate with stronger uniformity in
pairs of adjacent planets: low T_{eff} for planet masses, and low
metallicity and old age for planet densities. Furthermore, we explore
whether peas in a pod trends extend into planet compositions or
interior structures. For small neighbouring planets with similar
radii, we show that their masses and interior structures are often
disparate, indicating that even within the same system, similarity in
radii is not necessarily a good proxy for similarity in composition or
the physical nature of the planets.
Description:
The catalogue consists of masses, radii, semi-major axis and periods
of exoplanets in the main sample.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
catalog.dat 177 528 The main sample planets parameters
refs.dat 56 137 References
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- Planet Planet name
18- 31 A14 --- Star Star name
33 A1 --- l_Mass Indicator of lower (>) or upper (<) limit
for mass value
35- 49 F15.12 Mjup Mass [0/14]? Planet mass
51- 55 E5.1 Mjup e_Mass ? Planet mass min error
57- 61 E5.1 Mjup E_Mass ? Planet mass max error
63- 65 A3 --- f_Mass Mass detection type (I, RV, T, TTV)
67 A1 --- l_Radius Indicator of lower (>) or upper (<) limit
for radius value
69- 73 F5.3 Rjup Radius [0.02/3.45]? Planet radius
75- 79 E5.1 Rjup e_Radius ? Planet radius min error
81- 87 E7.2 Rjup E_Radius ? Planet radius max error
89- 98 F10.6 AU amaj [0/320]? Planet semi-major axis
100-104 E5.1 AU e_amaj ? Planet semi-major axis min error
106-112 F7.5 AU E_amaj ? Planet semi-major axis max error
114-128 F15.8 d Period [0.24/171667.5]? Planet period
130-138 E9.4 d e_Period ? Planet period min error
140-148 E9.4 d E_Period ? Planet period max error
150-177 A28 --- Ref References, in refs.dat file
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Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- Ref Reference code
9- 27 A19 --- BibCode bibCode
29- 56 A28 --- Aut Author's name
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Acknowledgements:
Elena Mamonova, elena.mamonova(at)geo.uio.no
(End) Patricia Vannier [CDS] 04-Mar-2024