TY - JOUR
T1 - On the use of Gaia magnitudes and new tables of bolometric corrections
AU - Casagrande, L.
AU - VandenBerg, Don A.
N1 - Publisher Copyright:
© 2018 The Author(s).
PY - 2018/9/1
Y1 - 2018/9/1
N2 - The availability of reliable bolometric corrections and reddening estimates, rather than the quality of parallaxes, will be one of the main limiting factors in determining the luminosities of a large fraction of Gaia stars. With this goal in mind, we provide Gaia GBP, G, and GRP synthetic photometry for the entire MARCS grid and test the performance of our synthetic colours and bolometric corrections against space-borne absolute spectrophotometry. We find indication of a magnitude-dependent offset in Gaia DR2 G magnitudes, which must be taken into account in high-accuracy investigations. Our interpolation routines are easily used to derive bolometric corrections at desired stellar parameters and to explore the dependence of Gaia photometry on Teff, log g, [Fe/H], [α/Fe], and E(B - V). Gaia colours for the Sun and Vega, and Teff-dependent extinction coefficients are also provided.
AB - The availability of reliable bolometric corrections and reddening estimates, rather than the quality of parallaxes, will be one of the main limiting factors in determining the luminosities of a large fraction of Gaia stars. With this goal in mind, we provide Gaia GBP, G, and GRP synthetic photometry for the entire MARCS grid and test the performance of our synthetic colours and bolometric corrections against space-borne absolute spectrophotometry. We find indication of a magnitude-dependent offset in Gaia DR2 G magnitudes, which must be taken into account in high-accuracy investigations. Our interpolation routines are easily used to derive bolometric corrections at desired stellar parameters and to explore the dependence of Gaia photometry on Teff, log g, [Fe/H], [α/Fe], and E(B - V). Gaia colours for the Sun and Vega, and Teff-dependent extinction coefficients are also provided.
KW - Stars: Hertzsprung-Russell and colour-magnitude diagrams
KW - Stars: atmospheres
KW - Stars: fundamental parameters
KW - Techniques: photometric
UR - http://www.scopus.com/inward/record.url?scp=85054754670&partnerID=8YFLogxK
U2 - 10.1093/mnrasl/sly104
DO - 10.1093/mnrasl/sly104
M3 - Article
SN - 1745-3925
VL - 479
SP - L102-L107
JO - Monthly Notices of the Royal Astronomical Society: Letters
JF - Monthly Notices of the Royal Astronomical Society: Letters
IS - 1
ER -