Stellar Rotation from GAIA Spectra

Details Stellar Rotation from GAIA Spectra Stellar Rotation from GAIA Spectra

2003-01-24

arxiv.org/abs/astro-ph/0301495v1

ASP Conf.Ser. 298 (2003) 285-290

Astronomy and Astrophysics

Astrophysics

6 pages, 5 figures; to be published in GAIA Spectroscopy, Science and Technology, ASP Conference Series, U.Munari (ed.)

Scientific paper

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.

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