DOI: 10.5281/zenodo.11428968
title: Galactic Component Classification For the all-sky PLATO Input Catalog

description: PLATO Targets Classification

This repository contains the full list of PLATO targets, classified into their Galactic Component membership. The basis for the catalogue is the all-sky PLATO input catalog (asPIC) by Montalto2021, crossmatched with Gaia DR3.

Files

There are four files included in this repository:





targets_classified:



Description: The entire sample, classified into thin disk, thick disk candidate, thick disk, halo candidate, and halo.

Note : Classification is only performed if relative uncertainties no greater than 20% in the following columns: "ra", "dec", "pmra", "pmdec", "parallax", and "radial_velocity". For targets where this requirement is not fulfilled, the related columns are filled with NaN.

Format: 2,675,538 rows, 61 columns





LOPS2:



Description: A subselection of targets_classified in the LOPS2 field.

Galactic Coordinates: l=255.9375°, b=-24.62432°

Additional Column: "n_cameras" specifying the number of PLATO cameras that will observe the target.

Format: 169,438 rows, 62 columns





LOPN1:



Description: A subselection of targets_classified in the LOPN1 field.

Galactic Coordinates: l=81.56250°, b=24.62432°

Format: 173,735 rows, 62 columns





special_target_list:



Description: A selection of 47 targets, kinematically classified as halo stars, within the high-SNR P1 PLATO sample.

Additional Column: "n_cameras" specifying the number of PLATO cameras that will observe the target, and "Field" specifying if target belongs to LOPS2 or LOPN1 field

Format: 47 rows, 63 columns




Classification Criteria

We classify only those stars into Galactic components that have relatively certain kinematic parameters. Specifically, we require no more than 20% relative uncertainty in the following columns: "ra", "dec", "pmra", "pmdec", "parallax", "radial_velocity". This results in 2,283,538 out of the total 2,675,539 stars having a component classification.

Analysis Conditions

For the analysis in our paper, we applied the following additional conditions:



Population.notnull()

Stellar type = FGK

Radius > 0

Mass > 0

Teff > 0

Logg.notnull()

[Fe/H].notnull()


Applying these conditions results in 1,830,288 entries remaining.

Columns

The columns in the dataset are as follows:




Column Name
Description




gaiaID_DR2
Gaia DR2 ID (from asPIC catalog, Montalto2021)


gaiaID_DR3
Gaia DR3 ID (matched to DR2 catalog, based on angular distance)


parallax
Parallax of target (mas), from Gaia DR3


e_parallax
Error on parallax


ra
Right Ascension (deg) from Gaia DR3


e_ra
Error on Right Ascension


dec
Declination (deg) from Gaia DR3


e_dec
Error on declination


pmra
Proper motion in right ascension direction (mas/yr), from Gaia DR3


e_pmra
Error on proper motion in right ascension direction


pmdec
Proper motion in declination direction (mas/yr), from Gaia DR3


e_pmdec
Error on proper motion in declination direction


radial_velocity
Radial velocity (km/s), from Gaia DR3


e_radial_velocity
Radial velocity error


[alpha/Fe]
Alpha elemental abundance from Gaia RV spectra, alphafe_gspspec in Gaia DR3


e_[alpha/Fe]_lower
Lower error on alpha element abundance


e_[alpha/Fe]_upper
Upper error on alpha element abundance


[Fe/H]
Metallicity estimate, either from RVS spectra (mh_gsspec in Gaia DR3, with first 13 quality flags equal to 0, Recio-Blanco2023) or XGBOOST (Andrae2023)


[Fe/H]_source
Source of the metallicity estimate


e_[Fe/H]_lower
Lower error on the metallicity estimate (NaN in case of Andrae2023)


e_[Fe/H]_upper
Upper error on the metallicity estimate (NaN in case of Andrae2023)


logg
log g estimate, either from RVS spectra (logg_gsspec in Gaia DR3, with first 13 quality flags equal to 0, Recio-Blanco2023) or XGBOOST (Andrae2023)


logg_source
Source of the log g estimate


e_logg_lower
Lower error on the log g estimate (NaN in case of Andrae2023)


e_logg_upper
Upper error on the log g estimate (NaN in case of Andrae2023)


[Fe/H]_apogee
Metallicity estimate from APOGEE-DR17


e_[Fe/H]_apogee
Error on APOGEE metallicity estimate


[alpha/M]_apogee
Alpha abundance estimate from APOGEE-DR17


e_[alpha/M]_apogee
Error on APOGEE alpha estimate


logg_apogee
log g estimate from APOGEE-DR17


e_logg_apogee
Error on APOGEE log g estimate


[Fe/H]_galah
Metallicity estimate from GALAH DR3


e_[Fe/H]_galah
Error on GALAH metallicity


[alpha/Fe]_galah
Alpha abundance estimate from GALAH DR3


e_[alpha/Fe]_galah
Error on GALAH alpha abundance


logg_galah
log g estimate from GALAH DR3


e_logg_galah
Error on GALAH log g


GLON
Galactic longitude (deg)


GLAT
Galactic latitude (deg)


U
Heliocentric velocity in the direction of the Galactic center (km/s), calculated from ra, dec, parallax, pmra, pmdec, radial_velocity using galpy, only available if Population could be determined (see Classification Criteria)


V
Heliocentric velocity in the direction of the Galactic rotation (km/s), calculated from ra, dec, parallax, pmra, pmdec, radial_velocity using galpy, only available if Population could be determined (see Classification Criteria)


W
Heliocentric velocity in the direction of the North Galactic Pole (km/s), calculated from ra, dec, parallax, pmra, pmdec, radial_velocity using galpy, only available if Population could be determined (see Classification Criteria)


UW
Total non-circular velocity UW = sqrt(U^2 + W^2) (km/s), only available if Population could be determined (see Classification Criteria)


R
Distance from the Galactic center in the Galactic plane (kpc), only available if Population could be determined (see Classification Criteria)


Z
Distance from the Galactic plane (kpc), only available if Population could be determined (see Classification Criteria)


gaiaV
V-band magnitude (from asPIC catalog, Montalto2021)


e_gaiaV
Error on V-band magnitude


Gmag
Gaia G magnitude (from asPIC catalog, Montalto2021)


e_Gmag
Error on G magnitude


Radius
Radius of star (solar radii) (from asPIC catalog, Montalto2021)


e_Radius
Error on radius


Mass
Mass of star (solar masses) (from asPIC catalog, Montalto2021)


e_Mass
Error on mass


Teff
Effective temperature of star (K) (from asPIC catalog, Montalto2021)


e_Teff
Error on effective temperature


Stellar Type
Classification into M or FGK type, based on asPIC catalog (Montalto2021)


u1
The first quadratic limb-darkening parameter, based on grid by Morello2022


u2
The second quadratic limb-darkening parameter, based on grid by Morello2022


TD/D
Probability ratio thick disk/thin disk (see Section 2.2. in our paper), only available if Population could be determined (see Classification Criteria)


TD/H
Probability ratio thick disk/halo (see Section 2.2 in our paper), only available if Population could be determined (see Classification Criteria)


Population
Galactic component classification (Thin Disk, Thick Disk, Halo, Thick Disk Candidate, Halo Candidate), see paper for definitions, only available if Population could be determined (see Classification Criteria)


n_cameras
Number of PLATO cameras observing the target (Additional Column for LOPS2, LOPN1, and Special Target List)


field
Flag for LOPS2 or LOPN1 fields (Additional Column for Special Target List)