The input astrometry parameters are represented by a 6-element array, with the following elements:
index gaia_source name unit description ----- ---------------- ---- ----------- 0: ra deg right ascension 1: dec deg declination 2: parallax mas parallax 3: pmra mas/yr proper motion in ra * cos(dec) 4: pmdec mas/yr proper motion in dec 5: radial_velocity km/s barycentric radial velocityThe units used by this function are the units used in the
gaia_source
table.
This convenience function just invokes the 7-argument
astromUVW
function
using the inverted parallax for the radial distance,
and without invoking the Doppler correction.
It is exactly equivalent to:
astromUVW(a[0], a[1], a[3], a[4], a[5], 1000./a[2], false)Note this naive inversion of parallax to estimate distance is not in general reliable for parallaxes with non-negligable errors.
astromUVW(array(ra, dec, parallax, pmra, pmdec,
radial_velocity))
icrsToGal(astromUVW(array(ra, dec, parallax, pmra, pmdec,
radial_velocity)))