Table information for 'ucdc.main'

General

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Resource Description: The Ultracool Dwarf Companion Catalogue consists of 278 multiple systems, 32 of which are newly discovered, each with at least one spectroscopically confirmed Ultracool Dwarf, within a 100 pc volume-limited sample. This catalogue is compiled using the Gaia Catalogue of Nearby Stars for stellar primaries and the Gaia Ultracool Dwarf Sample for low-mass companions and includes 241 doubles, 33 triples, and 4 higher-order systems established from positional, proper motion, and parallax constraints.

For a list of all services and tables belonging to this table's resource, see Information on resource 'Ultracool Dwarf Companion Catalogue UCDC'

Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference https://arxiv.org/abs/2408.07024 either in addition to or instead of the service reference.

To cite the table as such, we suggest the following BibTeX entry:

@MISC{vo:ucdc_main,
  year=2024,
  title={Ultracool Dwarf Companion Catalogue {UCDC}},
  author={Baig, Sayan and Smart, R. L. and Jones, Hugh R.A. and Gagné, Jonathan and Pinfield, D.J. and Cheng, Gemma and Moranta, Leslie},
  url={https://dc.zah.uni-heidelberg.de/tableinfo/ucdc.main},
  howpublished={{VO} resource provided by the {GAVO} Data Center}
}

Columns

Sorted alphabetically. [Sort by DB column index]

NameTable Head DescriptionUnitUCD
age Age Age of the object from age_ref Gyr time.age
age_ref Src. Age Age reference: 1 = gaia FLAME, 2 = White Dwarf, 3 = BANYAN Sigma N/A meta.bib
ang_sep Separation Angular Separation between companion and the ultracool dwarf arcsec pos.angDistance
astrometric_n_obs_al Gaia AL #Obs Total number of observations in the along the Gaia scan (AL) direction N/A meta.number
bd_ref Bin. Src Binarity discovery bibcode N/A meta.bib.bibcode
dec Dec Declination from epoch-ref deg pos.eq.dec;meta.main
discovery_name Disc. Name Known identifier from literature N/A meta.id.cross
epoch Pos. epooch Epoch of object position a time.epoch
epoch_ref Pos. Src. Bibcode for the source of the epoch position N/A meta.bib.bibcode;pos
err_age_lower Err Age ↓ Lower error in Age of the object Gyr stat.error;time.age
err_ageupper Err Age ↑ Upper error in Age of the object Gyr stat.error;time.age
err_logg_gspphot_lower Err logg ↓ Lower error in Surface gravity log(cm/s**2) stat.error;phys.gravity
err_logg_gspphotupper Err logg ↑ Upper error in Surface gravity log(cm/s**2) stat.error;phys.gravity
err_luminosity_lower Err L ↓ Lower error in Bolometric luminosity solLum stat.error;phys.luminosity
err_luminosityupper Err L ↑ Upper error in Bolometric luminosity solLum stat.error;phys.luminosity
err_mag_g Err. m_G Error in G-band mean magnitude mag stat.error;phot.mag;em.opt.V
err_mag_h Err. m_H Error in 2MASS H-band mean magnitude mag phot.mag;em.ir.h
err_mag_j Err. m_J Error in 2MASS J-band mean magnitude mag stat.error;phot.mag;em.ir.j
err_mag_k Err. m_K Error in 2MASS K_s-band mean magnitude mag stat.error;phot.mag;em.ir.K
err_mag_rp Err. m_RP Error in RP mean magnitude mag stat.error;phot.mag;em.opt.R
err_mass_lower Err Mass ↓ Lower error in object mass solMass stat.error;phys.mass
err_massupper Err Mass ↑ Upper error in object mass solMass stat.error;phys.mass
err_mh_gspphot_lower Err [Fe] ↓ Lower error in Iron abundance N/A stat.error;phys.abund.Fe
err_mh_gspphotupper Err [Fe] ↑ Upper error in Iron abundance N/A stat.error;phys.abund.Fe
err_pmdec Err. PM(Dec) Error in proper motion in Declination mas/a stat.error;pos.pm;pos.eq.dec
err_pmra Err. PM(RA) Error in the proper motion in Right Ascension mas/a stat.error;pos.pm;pos.eq.ra
err_rv Err. RV Error in radial velocity km/s stat.error;phys.veloc;pos.heliocentric
err_t_eff_espucd Err. T_eff ESP Error in T_eff from ESP-UCD K stat.error;phys.temperature.effective
err_t_eff_lower Err T_eff ↓ Lower error in effective temperature K stat.error;phys.temperature.effective
err_t_effupper Err T_eff ↑ Upper error in effective temperature K stat.error;phys.temperature.effective
fpp FPP False-Positive Probability - Probability of the system being a False-Positive match N/A stat.fit.goodness
ipd_frac_multi_peak #IPD multi-peak Percent of successful-IPD windows with more than one peak % stat.value
ipd_gof_harmonic_amplitude IPD GoF Ampl. Amplitude of the IPD GoF versus position angle of scan deg stat.value
logg_gspphot logg Surface gravity from GSP-Phot (DR3) (Median of MCMC values) log(cm/s**2) phys.gravity
luminosity L Bolometric luminosity solLum phys.luminosity
luwe LUWE Local Unit Weight Error as per 2022MNRAS.513.5270P N/A stat.error
mag_g m_G G-band mean magnitude mag phot.mag;em.opt.V
mag_g_rp G-RP G-RP colour mag phot.color;em.opt.V;em.opt.R
mag_h m_H 2MASS H-band mean magnitude mag phot.mag;em.ir.h
mag_j m_J 2MASS J-band mean magnitude mag phot.mag;em.ir.j
mag_k m_K 2MASS K_s-band mean magnitude mag phot.mag;em.ir.K
mag_rp m_RP RP mean magnitude mag phot.mag;em.opt.R
mass Mass Mass of the object from mass_ref solMass phys.mass
mass_ref Src. Mass Mass reference: 1 = gaia FLAME, 2 = White Dwarf, 3 = BANYAN Sigma N/A meta.bib
mh_gspphot [Fe] Iron abundance from GSP-Phot (DR3) (Median of MCMC values, log relative to solar) N/A phys.abund.Fe
num_comp #comp Total number of objects that make up the system N/A meta.number
parallax π Parallax taken from parallax_ref mas pos.parallax
parallax_err Err.π Error in parallax mas stat.error;pos.parallax
parallax_ref Src. π Bibcode for the source of the parallax value N/A meta.bib.bibcode;pos.parallax
phot_g_n_obs Gaia G #Obs Number of observations contributing to G photometry N/A meta.number
phot_rp_n_blended_transits #RP blended Number of RP blended transits N/A meta.number
phot_rp_n_obs Gaia RP #Obs Number of observations contributing to RP photometry N/A meta.number
plx_diff Δπ Difference in Parallax between companion and the ultracool dwarf mas pos.parallax;arith.diff
pm_diff Δμ Proper Motion difference between companion and the ultracool dwarf, absolute value mas/a pos.pm;arith.diff
pm_ref Src. PM Bibcode for the source of the proper motions N/A meta.bib.bibcode;pos.pm
pma_diff Δ(PA) Proper Motion difference between companion and the ultracool dwarf, position angle deg pos.posAng;arith.diff
pmdec PM(Dec) Proper motion in Declination from pm_ref mas/a pos.pm;pos.eq.dec
pmra PM(RA) Proper motion in Right Ascension from pm_ref mas/a pos.pm;pos.eq.ra
projected_sep Comp. Dist Projected physical separation between companion and the ultracool dwarf AU pos.distance
ra RA Right Ascension from epoch_ref deg pos.eq.ra;meta.main
ruwe RUWE Renormalised Unit Weight Error N/A stat.error
rv RV Radial Velocity from rv_ref km/s phys.veloc;pos.heliocentric
rv_ref Src. RV Bibcode of the source of rv N/A meta.bib.bibcode;phys.veloc;pos.heliocentric
short_name Name Short (and unique) name used in this catalogue N/A meta.id
source_id Source Id Unique source identifier for Gaia DR3 [Note id] N/A meta.id.cross
sptnir Sepct. IR Near Infrared Spectral Type from sptnir_ref N/A src.sptype
sptnir_ref Src. Spectype IR Reference for the near infrared spectral type N/A meta.bib.bibcode;src.sptype
sptopt Spect. Opt. Optical Spectral Type from sptopt_ref N/A src.sptype
sptopt_ref Src. Spectype Opt Reference for the optical spectral type N/A meta.bib.bibcode;src.sptype
sys_num Cat. nr. Identifier of the system in the UCDC N/A meta.id;meta.main
t_eff T_eff Effective temperature from t_eff_ref K phys.temperature.effective
t_eff_ref Src. T_eff 1 = GSP-Phot, 2 = ESP-UCD N/A meta.bib
v_tan Tangential Tangential Velocity km/s phys.veloc.transverse

Columns that are parts of indices are marked like this.

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