LOCNES: Low Cost NIR Extended Solar Telescope
R. Claudi, A. Ghedina, E. Pace, L. Gallorini, A.-M. Di Giorgio, S. J., Liu, A. Tozzi, I. Carleo, A. F. Lanza, G. Micela, E. Molinari, E. Poretti, D., Phillips, G. Tripodo

TL;DR
LOCNES is a low-cost solar telescope designed to collect near-infrared and visible spectra of the Sun to better understand stellar activity noise in radial velocity measurements, aiding exoplanet detection.
Contribution
The paper introduces the LOCNES project, a novel low-cost solar telescope setup for simultaneous visible and near-infrared RV measurements of the Sun as a star.
Findings
First RV time series in NIR for the Sun
Linking photospheric phenomena to stellar RV noise
Enhanced understanding of stellar activity effects
Abstract
The search for telluric extrasolar planets with the Radial Velocity (RV) technique is intrinsically limited by the stellar jitter due to the activity of the star, because stellar surface inhomogeneities, including spots, plages and convective granules, induce perturbations hiding or even mimicking the planetary signal. This kind of noise is poorly understood in all the stars, but the Sun, due to their unresolved surfaces. For these reasons, the effects of the surface inhomogeneities on the measurement of the RV are very difficult to characterize. On the other hand, a better knowledge of these phenomena can allow us a step forward in our understanding of solar and stellar RV noise sources. This will allow to develop more tools for an optimal activity correction leading to more precise stellar RVs. Due to the high spatial resolution with which the Sun is observed, this noise is well known…
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Taxonomy
TopicsStellar, planetary, and galactic studies · Solar and Space Plasma Dynamics · Astronomy and Astrophysical Research
