Stellar Rotation from GAIA Spectra
Abstract
Stellar rotation influences our understanding of stellar structure and evolution, binary systems, clusters etc. and therefore the benefits of a large and highly accurate database on stellar rotation, obtained by GAIA, will be manifold. To study the prospects of GAIA measurement of projected rotational velocities v_rot sin i, we use synthetic stellar spectra to simulate the determination of v_rot sin i at different resolutions (R=5000 - 20000) and S/N (10-300). Results on the accuracy of v_rot sin i, presented here, show that GAIA will be capable to measure also low rotational velocities (~10 km/s), provided that the resolution is higher than 10.000, or preferably even higher.
Cite
@article{arxiv.astro-ph/0301495,
title = {Stellar Rotation from GAIA Spectra},
author = {Andreja Gomboc},
journal= {arXiv preprint arXiv:astro-ph/0301495},
year = {2007}
}
Comments
6 pages, 5 figures; to be published in GAIA Spectroscopy, Science and Technology, ASP Conference Series, U.Munari (ed.)