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On the use of Gaia magnitudes and new tables of bolometric corrections.
- Source :
-
Monthly Notices of the Royal Astronomical Society: Letters . Sep2018, Vol. 479 Issue 1, pL102-L107. 6p. - Publication Year :
- 2018
-
Abstract
- 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 G BP, G, and G RP 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 T eff, $$\log \,g$$, $$\rm {[Fe/H]}$$, $$[\alpha /\rm {Fe}]$$, and E (B − V). Gaia colours for the Sun and Vega, and T eff-dependent extinction coefficients are also provided. [ABSTRACT FROM AUTHOR]
- Subjects :
- *GAIA hypothesis
*HR diagrams
*STELLAR luminosity function
*SPECTROPHOTOMETRY
Subjects
Details
- Language :
- English
- ISSN :
- 17453925
- Volume :
- 479
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Monthly Notices of the Royal Astronomical Society: Letters
- Publication Type :
- Academic Journal
- Accession number :
- 132515596
- Full Text :
- https://doi.org/10.1093/mnrasl/sly104