Exoplanetary systems: past, present, and future
Pale Red Dot : An optimized Earth-hunting experiment around Proxima Centauri
Guillem Anglada-Escude
The Pale Red Dot collaboration (www.palereddot.org)
Queen Mary University of London
Proxima Centauri is our closest stellar neighbor and it is the smallest member
of the Alpha Centauri stellar system. With only 0.1\% of the luminosity of the
Sun, the orbits of rocky planets that could support liquid water, known as the
star's habitable zone, are located very close to it. The re-analysis of historic and recent high cadence observations with UVES and HARPS indicated the presence of a Doppler signal consistent with a small planet with a period between 10 and 20 days (the habitable zone of the star). However, due to strongly uneven sampling and contamination by stellar activity, a unique solution could not be derived. The Pale Red Dot campaign was a new observing run of ~60 consecutive nights (Jan 20, Apr 1st) with the HARPS/ESO spectrograph (1xspec/night) and simultaneous photometric follow-up in 4 photometric bands with the ASH2/Atacama telescope and telescopes of the LCOGT network. An outreach campaign supported by ESO and some other institutes allowed to broadcast the two months of the data-aquisition process and release invited articles from exoplanet experts abroad.


09:00 - 10:30
EX - LT3 (320)