Information on Service 'Gaia EB classification Cone Search'

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This resource provides the results of a morphological classification of 2,184,283 eclipsing binary candidates from the Gaia DR3 catalogue. The systems are classified into detached and overcontact configurations, followed by the identification of starspot signatures within both morphological classes. The classification was performed using a hierarchical computer-vision pipeline based on a fine-tuned ResNet-18 convolutional neural network trained on synthetic light curves generated with the ELISa code. The phase-folded Gaia G-band light curves are represented as 3-channel 128×128 pixel images encoding the flux distribution, its polar transformation, and the flux gradient. A tailored augmentation scheme calibrated to the Gaia cadence distribution was applied to reduce the synthetic-to-real domain gap (in prep). Because the morphological classification is based on single-passband Gaia G photometry alone, overcontact and ellipsoidal systems cannot be reliably distinguished. Therefore, systems with orbital periods P > 3 d initially classified as overcontact are explicitly reassigned as "ellipsoidal", since such long-period overcontact configurations are physically unlikely for main-sequence stars.

For a list of all services and tables belonging to this service's resource, see Information on resource 'Morphological classification of eclipsing binaries from the Gaia'

Overview

You can access this service using:

Coverage

Intervals of messenger energies reflected in this resource: 1.23984 3.8149 eV

This service is published as follows:

local means it is listed on our front page, ivo_managed means it has a record in the VO registry.

Input Fields

The following fields are available to provide input to the service (with some renderers, some of these fields may be unavailable):

NameTable Head DescriptionUnitUCD
DEC Delta (ICRS) Declination (ICRS decimal) deg pos.eq.dec
hscs_pos Position/Name Coordinates (as h m s, d m s or decimal degrees), or SIMBAD-resolvable object N/A N/A
hscs_sr Search radius Search radius in arcminutes N/A N/A
main_class Main class detached, overcontact or Eellispsoidal N/A meta.code.class
maxrec Match limit Maximum number of records returned. Pass 0 to retrieve service parameters. N/A N/A
RA Alpha (ICRS) Right Ascension (ICRS decimal) deg pos.eq.ra
responseformat Output Format File format requested for output. N/A meta.code.mime
source_id Gaia DR3 ID Gaia DR3 identifier N/A meta.id;meta.main
spot_class Spot class Presence of spots N/A meta.code.class
SR Search Radius Search radius deg N/A
verb Verbosity Exhaustiveness of column selection. VERB=1 only returns the most important columns, VERB=2 selects the columns deemed useful to the average user, VERB=3 returns a table with all available columns. N/A N/A

Default Output Fields

The following fields are contained in the output by default. More fields may be available for selection; these would be given below in the VOTable output fields.

NameTable Head DescriptionUnitUCD
_r Dist. Distance to cone center deg pos.angDistance
dec Dec (ICRS) Barycentric Declination in ICRS at epoch J2016.0 from Gaia DR3 deg pos.eq.dec;meta.main
dec_error Err. Dec Standard error of dec from Gaia DR3 mas stat.error;pos.eq.dec
main_class Main class detached, overcontact or Eellispsoidal Note main_class_note N/A meta.code.class
period Period Period of the variable star calcukated from Gaia DR3 frequency d src.var;time.period
prob_detached detached probability Probability of classification as detached Note prob_over N/A meta.code.class;stat.probability
prob_overcontact overcontact probability Probability of classification as overcontact Note prob_over N/A meta.code.class;stat.probability
prob_spot spot probability Probability of classification as spotted N/A meta.code.class;stat.probability
ra RA (ICRS) Barycentric Right Ascension in ICRS at epoch J2016.0 from Gaia DR3 deg pos.eq.ra;meta.main
ra_error Err. RA Standard error of ra (with cos δ applied) from Gaia DR3 mas stat.error;pos.eq.ra
source_id Gaia DR3 ID Gaia DR3 identifier N/A meta.id;meta.main
spot_class Spot class Presence of spots N/A meta.code.class
teff teff_gspphot Effective temperature from Gaia DR3 GSP-Phot Aeneas best library using BP/RP spectra K phys.temperature.effective

VOTable Output Fields

The following fields are available in VOTable output. The verbosity level is a number intended to represent the relative importance of the field on a scale of 1 to 30. The services take a VERB argument. A field is included in the output if their verbosity level is less or equal VERB*10.

NameTable Head DescriptionUnitUCD Verb. Level
ra RA (ICRS) Barycentric Right Ascension in ICRS at epoch J2016.0 from Gaia DR3 deg pos.eq.ra;meta.main 1
dec Dec (ICRS) Barycentric Declination in ICRS at epoch J2016.0 from Gaia DR3 deg pos.eq.dec;meta.main 1
_r Dist. Distance to cone center deg pos.angDistance 10
source_id Gaia DR3 ID Gaia DR3 identifier N/A meta.id;meta.main 20
period Period Period of the variable star calcukated from Gaia DR3 frequency d src.var;time.period 20
teff teff_gspphot Effective temperature from Gaia DR3 GSP-Phot Aeneas best library using BP/RP spectra K phys.temperature.effective 20
main_class Main class detached, overcontact or Eellispsoidal Note main_class_note N/A meta.code.class 20
prob_detached detached probability Probability of classification as detached Note prob_over N/A meta.code.class;stat.probability 20
prob_overcontact overcontact probability Probability of classification as overcontact Note prob_over N/A meta.code.class;stat.probability 20
spot_class Spot class Presence of spots N/A meta.code.class 20
prob_spot spot probability Probability of classification as spotted N/A meta.code.class;stat.probability 20
ra_error Err. RA Standard error of ra (with cos δ applied) from Gaia DR3 mas stat.error;pos.eq.ra 20
dec_error Err. Dec Standard error of dec from Gaia DR3 mas stat.error;pos.eq.dec 20

Citation Info

VOResource XML (that's something exclusively for VO nerds)

Note main_class_note

We explicitly assign the main class "ellipsoidal" to all systems with period > 3 d that are classified as overcontact, because such systems are physically unlikely. Using a single-passband light curve alone, we cannot reliably distinguish between overcontact and ellipsoidal systems.

Note prob_over

For systems explicitly reclassified as "ellipsoidal" based on long period and overcontact-like lightcurve shape, the value of prob_overcontact should be interpreted as the probability of an ellipsoidal classification.