Details

Autor(en) / Beteiligte

• Borgniet, S
• Meunier, N
• Lagrange, A-M

Titel

Using the Sun to estimate Earth-like planets detection capabilities: V. Parameterizing the impact of solar activity components on radial velocities

Ist Teil von

• Astronomy and astrophysics (Berlin), 2015-09, Vol.581, p.1-22

Erscheinungsjahr

2015

Link zum Volltext

Quelle

Elektronische Zeitschriftenbibliothek (Open access)

Beschreibungen/Notizen

• Stellar activity induced by active structures such as stellar spots and faculae is known to have a strong impact on the radial velocity (RV) time series. For this purpose, we computed the RV, photometric and astrometric variations induced by solar magnetic activity, using all active structures observed over one entire cycle. Our goal is to perform similar studies on stars with different physical and geometrical properties. To do so, we first parameterize the solar active structures with the most realistic pattern so as to obtain results consistent with the observed ones. We then build the resulting spectra and deduce the RV and photometric variations, first in the case of a sun seen edge-on and then with various inclinations. Results. The comparison between our simulated activity pattern and the observed pattern validates our model. We show that the inclination of the stellar rotation axis has a significant impact on the photometric and RV time series.