NSS orbital models compatible with two-body solution (gaiadr3.nss_two_body_orbit)

The table has 443205 rows, 77 columns.

Description

This table contains non-single-star orbital models for sources compatible with an orbital two-body solution. This covers astrometric binaries, spectroscopic binaries, eclipsing binaries and certain combinations thereof. Several possible models are hosted within the same table and they are indicated by the field nss_solution_type. The description of this latter lists all possible solution types considered for this release. Only a selection of parameters hosted in this table are provided here, depending on the solution. The details of those is given in the description of field bit_index, which can also be used to extract the relevant elements of the correlation vector corr_vec.Details about the formalism used to derive the parameters in this table are given in the on-line documentation, see Chapter cu4nss. Warning: as a source may receive independent astrometric, spectroscopic or photometric orbits, a query using a given source_id may return several solutions. This has to be accounted for when doing a crossmatch by source_id.

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
solution_id	long	meta.version		Solution Identifier
source_id	long	meta.id meta.main meta.ref		Source Identifier
nss_solution_type	char	meta.record		NSS model adopted
ra	double	pos.eq.ra meta.main	deg	Right ascension
ra_error	float	stat.error pos.eq.ra	mas	Standard error of right ascension
dec	double	pos.eq.dec meta.main	deg	Declination
dec_error	float	stat.error pos.eq.dec	mas	Standard error of declination
parallax	double	pos.parallax	mas	Parallax
parallax_error	float	stat.error pos.parallax	mas	Standard error of parallax
pmra	double	pos.pm pos.eq.ra	mas.yr**-1	Proper motion in right ascension direction
pmra_error	float	stat.error pos.pm pos.eq.ra	mas.yr**-1	Standard error of proper motion in right ascension direction
pmdec	double	pos.pm pos.eq.dec	mas.yr**-1	Proper motion in declination direction
pmdec_error	float	stat.error pos.pm pos.eq.dec	mas.yr**-1	Standard error of proper motion in declination direction
a_thiele_innes	double	phys.angSize	mas	Thiele-Innes element A
a_thiele_innes_error	float	stat.error phys.angSize	mas	Standard error of Thiele-Innes element A
b_thiele_innes	double	phys.angSize	mas	Thiele-Innes element B
b_thiele_innes_error	float	stat.error phys.angSize	mas	Standard error of Thiele-Innes element B
f_thiele_innes	double	phys.angSize	mas	Thiele-Innes element F
f_thiele_innes_error	float	stat.error phys.angSize	mas	Standard error of Thiele-Innes element F
g_thiele_innes	double	phys.angSize	mas	Thiele-Innes element G
g_thiele_innes_error	float	stat.error phys.angSize	mas	Standard error of Thiele-Innes element G
c_thiele_innes	double	phys.angSize phys.angSize.smajAxis	AU	C element of Thiele-Innes
c_thiele_innes_error	float	stat.error phys.angSize phys.angSize.smajAxis	AU	Standard error of C element of Thiele-Innes
h_thiele_innes	double	phys.angSize phys.angSize.smajAxis	AU	H element of Thiele-Innes
h_thiele_innes_error	float	stat.error phys.angSize phys.angSize.smajAxis	AU	Standard error of H element of Thiele-Innes
period	double	time.period	d	Orbital Period
period_error	float	stat.error time.period	d	Standard error of Orbital Period
t_periastron	double	time.epoch	d	Periastron epoch
t_periastron_error	float	stat.error time.epoch	d	Standard error of Periastron epoch
eccentricity	double	src.orbital.eccentricity		eccentricity
eccentricity_error	float	stat.error src.orbital.eccentricity		Standard error of eccentricity
center_of_mass_velocity	double	phys.veloc	km.s**-1	The velocity of the center of mass
center_of_mass_velocity_error	float	stat.error phys.veloc	km.s**-1	Standard error of The velocity of the center of mass
semi_amplitude_primary	double	phys.veloc	km.s**-1	Semi-amplitude of the center of mass
semi_amplitude_primary_error	float	stat.error phys.veloc	km.s**-1	Standard error of Semi-amplitude of the center of mass
semi_amplitude_secondary	double	phys.veloc	km.s**-1	The semiamplitude of the radial velocity curve for second component
semi_amplitude_secondary_error	float	stat.error phys.veloc	km.s**-1	Standard error of The semiamplitude of the radial velocity curve for second component
mass_ratio	double	phys.mass arith.ratio		Mass ratio
mass_ratio_error	float	stat.error		Standard error of Mass ratio
fill_factor_primary	double	src.morph.param		Fill factor of primary
fill_factor_primary_error	float	stat.error		Standard error of Fill factor of primary
fill_factor_secondary	double	src.morph.param		Fill factor of secondary
fill_factor_secondary_error	float	stat.error		Standard error of Fill factor of secondary
inclination	double	src.orbital.inclination	deg	Orbital inclination
inclination_error	float	stat.error src.orbital.inclination	deg	Standard error of Orbital inclination
arg_periastron	double	src.orbital.periastron	deg	Argument of periastron
arg_periastron_error	float	stat.error src.orbital.periastron	deg	Standard error of Argument of periastron
temperature_ratio	double	phys.temperature arith.ratio		Ratio of the effective temperatures
temperature_ratio_error	double	stat.error phys.temperature		Standard error of the ratio of the effective temperatures
temperature_ratio_definition	short	meta.number		Code defining which fitting scenario did apply to the effective temperature
astrometric_n_obs_al	integer	meta.number		Total astrometric CCD observations in AL considered
astrometric_n_good_obs_al	integer	meta.number		Total astrometric CCD observations in AL actually used
rv_n_obs_primary	integer	meta.number		Total number of radial velocities considered for the primary
rv_n_good_obs_primary	integer	meta.number		Total number of radial velocities actually used for the primary
rv_n_obs_secondary	integer	meta.number		Total number of radial velocities considered for the secondary in the case of SB2
rv_n_good_obs_secondary	integer	meta.number		Total number of radial velocities actually used for the secondary in the case of SB2
phot_g_n_obs	integer	meta.number		Total number of G photometry measurements considered
phot_g_n_good_obs	integer	meta.number		Total number of G photometry measurements actually used
bit_index	long	meta.code.status		boolean mask for the fields above in the corrVec matrix
corr_vec	float[]	stat.correlation		Vector form of the upper triangle of the correlation matrix (column-major ordered)
obj_func	float	stat.fit.param		value of the objective function at the solution
goodness_of_fit	float	stat.fit.goodness		goodness of fit in the Hipparcos sense
efficiency	float	stat.fit.param		Efficiency of the solution
significance	float	stat.fit.param		The significance of the solution (i.e. how worth keeping a model is)
flags	long	meta.code.qual		Quality flag for the achieved NSS solution
conf_spectro_period	float	stat.probability		The probability of the period for not being due to (gaussian white) noise. Relevant for SB1, SB1C, SB2 and SB2C models. To be ignored otherwise.
r_pole_sum	double	phys.size.radius		Sum of the polar radii of primary and secondary (in units of the semi-major axis)
r_l1_point_sum	double	phys.size.radius		L1-pointing radii of primary and secondary (in units of the semi-major axis)
r_spher_sum	double	phys.size.radius		Sum of the radii of sphere having the same volume as the primary and secondary (in units of the semi-major axis
ecl_time_primary	double	time.crossing	d	Time of mid-eclipse of the primary by the secondary
ecl_time_secondary	double	time.crossing	d	Time of mid-eclipse of the secondary by the primary
ecl_dur_primary	double	time.duration	d	Duration of primary eclipse assuming spherical components
ecl_dur_secondary	double	time.duration	d	Duration of secondary eclipse assuming spherical components
g_luminosity_ratio	double	phys.luminosity arith.ratio		Ratio of the G-band luminosity of the secondary over the primary
input_period_error	float	stat.error time.period	d	Standard error of the period taken from VariEclipsingBinary.frequencyError
g_rank	double	stat.fit.param		Rank of the G-band solution
astrometric_jitter	double	stat.value	mas	Uncorrelated astrometric jitter term