Classifications For Exoplanet and Exoplanetary Systems
When a star is described as a spectral class G2V, we know its approximate mass, temperature, age, and size. At more than 5,700 exoplanets discovered, it is a natural developmental step to establish a classification for them, such as for example, the Harvard classification for stars.
This exoplanet classification has to be easily interpreted and present the most relevant information about them and divides them into groups based on certain characteristics. We propose an exoplanet classification, which using an easily readable code, may inform you about a exoplanet’s main characteristics.
Schematic explanation — a presentation of the classification for exoplanets. — astro-ph.EP
The suggested classification code contains four parameters by which we can quickly determine the range of temperature, mass, density and their eccentricity. The first parameter concerns the mass of an exoplanet in the form of the units of the mass of other known planets, where e.g. M represents the mass of Mercury, E that of Earth, N Neptune, or J Jupiter.
The second parameter is the mean Dyson temperature of the extoplanet’s orbit, for which we established four main classes: F represents the Frozen class, W the Water class, G the Gaseous class, and R the Roaster class. The third parameter is eccentricity and the fourth parameter is surface attribute which is defined as the bulk density of the exoplanet, where g represents a gaseous planet, w – water planet, t – terrestrial planet, i – iron planet and s – super dense planet.
The classification code for Venus, could be EG0t (E – mass in the range of the mass of the Earth, G – Gaseous class, temperature in the range from 450 to 1000 K, 0 – circular or nearly circular orbit, t – terrestrial surface), for Earth it could be EW0t (W – Water class – a possible Habitable zone).
This classification is very helpful in, for example, quickly delimiting if a planet can be found in the Habitable zone; if it is terrestrial or not.
M-R diagram according to mass classes. There are several individual figures for all mass classes and merged figures for some classes which present interesting features. The colours of the dots are according to the temperature classes. For comparison, Solar System planets are shown as red dots. — astro-ph.EP
E. Plávalová, A. Rosaev
Classifications for Exoplanet and Exoplanetary Systems — Could it be developed? I. Exoplanet Classification
Comments: 7 pages, 4 figures, 3 tables
Subjects: Earth and Planetary Astrophysics (astro-ph.EP); Instrumentation and Methods for Astrophysics (astro-ph.IM)
Cite as: arXiv:2409.09666 [astro-ph.EP] (or arXiv:2409.09666v1 [astro-ph.EP] for this version)
https://doi.org/10.48550/arXiv.2409.09666
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Submission history
From: Eva Plávalová PhD.
[v1] Sun, 15 Sep 2024 08:36:32 UTC (1,031 KB)
https://arxiv.org/abs/2409.09666
Astrobiology
