The Exoplanet Encyclopaedia — Readme
About the use of this catalog
update: 27 November 2007
Working tool providing all the latest detections and data announced by professional astronomers, useful to facilitate progress in exoplanetology.
Ultimately, researchers willing to make a quantitative, scientific, use of the catalog can make their own judgement on the likelihood of data and detections.
- Criteria for inclusion in the catalog
- Physical criteria
The basic criterion is, in principle, the mass limit: 13 Jupiter mass.
This criterion (based on absence of a thermonuclear source of energy) is somewhat arbitray since a companion could start its formation by dust accretion in a disk and end -up with a mass > 13 MJup.
But, do to the lack of precision in the definition of a planet, this criterion has to be made more flexible. For instance, if the star has a planetary companion, other companions with masses less than 20 Jupiter masses are included.
An additional difficulty comes from the uncertainty in the mass value (for instance an object with a mass 19 +/- 3 MJup could have a true mass value < 13 MJup with a 2 sigma statistical deviation (= 12% probability).
We thus finally include planets with masses < 20 Jup up to 2 sigma
- Confidence criteria
Detections resting only on transits (no radial velocity available) are labelled (T) and are in the "Unconfirmed" section of the catalog..
- Planet detections published in refereed papers (R)
- Planet detections published in papers submitted to professional journals (S)
- Planet detections announced by profesionnal astronomers in professional conferences (C)
- Planet data
Planet data are the latest data known. They are taken from:
- Latest published papers or professional preprints and conferences
- First-hand updated data on professional websites. These presently are:
- Stellar data
Stellar data (positions, distances, V mag, mass, metallicities etc) are taken from Simbad or from professional papers on exoplanets.
- Planet names
For single planetary companions to a host star, the name is generally NNN b where NNN is the parent star name.
For multi-planet systems, the planet names are NNN x where x = b, c, d, etc refers to the chronological order of discovery of the planet.
Exceptions are possible, like TrES-1 or planets detected by microlensing.
For "free floating" planets, the name is the name given by the discoverers.
Are provided, with different on-line filters:
These statistics are only indicative since they do not take into account possible biases.
- Histogrammes for planet and stellar characteristics
- Correlation diagrammes between characteristics
For the use of statistics see Stats README
The functionalities offered would not have been possible without the technical help of Cyril Dedieu.