MCMC samples for MSC (gaiadr3.mcmc_samples_msc)
The table has 348711151 rows, 12 columns.
Description
This is the DataLink table hosting Monte-Carlo Markov Chain (MCMC) samples for the posterior probability distribution of all parameters derived from the Multiple Source Classifier (MSC, see Section cu8par_apsis_msc in the online documentation). 100 random MCMC samples are provided for each source.The table considers the following parameters:
- effective temperature Teff, 1 of the primary star
- effective temperature Teff, 2 of the secondary star
- surface gravity log g1 of the primary star
- surface gravity log g2 of the secondary star
- monochromatic extinction at 547.7~nm A0
- metallicity [M/H]
- distance
- logarithmic posterior probability
- logarithmic likelihood
Attribution
If you have used Gaia data in your research, please use the following acknowledgement:
This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.
More information can be found on the credit and citation instructions page.
Columns
| Name | Type | UCD | Unit | Description |
|---|---|---|---|---|
| source_id | long |
meta.id meta.main meta.ref |
Unique source identifier (unique within a particular Data Release) |
|
| solution_id | long | meta.version |
Solution Identifier |
|
| nsamples | short | meta.number |
Number of samples in the chain from MSC |
|
| teff1 | float[] | phys.temperature.effective | K |
MCMC samples for Teff, 1 of primary from MSC |
| teff2 | float[] | phys.temperature.effective | K |
MCMC samples for Teff, 2 of secondary from MSC |
| logg1 | float[] | phys.gravity | log(cm.s**-2) |
MCMC samples for log g1 of primary from MSC |
| logg2 | float[] | phys.gravity | log(cm.s**-2) |
MCMC samples for log g2 of secondary from MSC |
| azero | float[] |
phys.absorption em.opt |
mag |
MCMC samples for extinction A0 from MSC |
| mh | float[] | phys.abund.Fe | "dex" |
MCMC samples for the metallicity from MSC |
| distancepc | float[] | pos.distance | pc |
MCMC samples for distance from MSC |
| log_pos | float[] | stat.probability |
MCMC samples for the log-posterior from MSC |
|
| log_lik | float[] | stat.likelihood |
MCMC samples for the log-likelihood from MSC |