Gaia exoplanets - Gaia
Gaia (candidate) exoplanet list
Over the course of its mission, Gaia will detect many exoplanets using different methods. Below, an overview is given of these different ways of detecting exoplanets by Gaia, as well as a list of identifiers of exoplanet candidates and names of confirmed exoplanets. To allow users to look up the data in the Gaia Archive, also the Gaia source ID is given along with them.
The list is updated with time, when more candidates are discovered by Gaia but equally when candidates discovered by Gaia are confirmed to be exoplanets. Unavoidably, there will be a short delay between the confirmations and the publication on this page.
For completeness, also known exoplanets available from the Gaia catalogue are given with their Gaia source IDs for reference.
methods of detecting exoplanets
The Gaia Data Processing and Analysis Consortium (DPAC) extracts exoplanet detections from the Gaia observations using three different methods:
- Astrometrically, by observing the wobble of the host star's position on the sky caused by the exoplanet
- Photometrically, by observing the photometric transit of the exoplanet in front of its host star
- Spectroscopically, by observing the variation in the radial velocity of the host star caused by the exoplanet
Naming of Gaia's exoplanet candidates
The naming of the exoplanet candidates follows these three methods:
- Astrometric detection: Gaia-ASOI-#
- Photometric transit: Gaia-TROI-#
- Radial velocity: Gaia-RVOI-#
Where AS, TR, and RV indicate the detection method, while OI stands for "object of interest", which follows the established practice by missions like Kepler and TESS.
Naming of Gaia's confirmed exoplanets
Confirmed exoplanets are named 'Gaia-#-a', 'Gaia-#-b', etc. with the numbering following the chronological order of confirmation. This means that the numbers of the exoplanet candidates will not correspond to the numbers of the confirmed exoplanets.
For reference, a table is provided on this page to link the candidates to the confirmed cases. To help you find the data for these candidates and exoplanets, also the connection is provided to the data through the Gaia source ID. Recall that each Gaia data release uses it own source identifiers.
Gaia (candidate) exoplanet list
The list is maintained by Alessandro Sozzetti (Gaia Data Processing and Analysis Consortium). Feedback and questions can be sent to the Gaia Helpdesk.
The detection of (candidate) exoplanets by Gaia is described in section 10.10 of the Gaia DR3 documentation. The paper "Gaia Data Release 3: Stellar multiplicity, a teaser for the hidden treasure - Gaia Collaboration, Arenou, F. , et al. (2022)" contains more details on the astrometrically detected (candidate) exoplanets
When using the data of the above list, please cite the Gaia mission paper.
When using the data obtained from the Gaia catalogues for the sources given in the list above, please follow the credit and citation instructions for the respective catalogue / data release.
Last update to the list
The last update to the Gaia (candidate) exoplanet list has been performed on 15 June 2022.