literature
Literature
Authors
Jobs
Seminars
Conferences
DataBETA

Alpha-process elements in the galaxy: a possible gaia contribution

Jan, 2002
8 pages
Published in:
  • Astron.Astrophys. 280 (2002) 143
e-Print:
DOI:
Report number:
  • UAO-02-P153
View in:
pdf
reference search0 citations

Citations per year

0 Citations
Abstract: (arXiv)
The sensitivity of stellar spectra to alpha/Fe abundance changes is investigated with the aim to be detected photometricly and employed for scientific goals of the GAIA mission. A grid of plane parallel, line blanketed, flux constant, LTE model atmospheres with different [alpha/Fe] ratios was calculated. As a first step, the modelled stellar energy fluxes for solar-type stars and giants were computed and intercompared. The spectral sensitivity talpha/Fe abundance changes is noticeable and has to be taken into account when selecting photometric filters for GAIA. The Ca II H and K lines and Mg I b triplet are the most sensitive direct indicators of alpha/Fe abundance changes.