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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20230112T103000
DTEND;TZID=Atlantic/Canary:20230112T113000
UID:iactalks-1635
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/1635
CREATED:2023-01-12T10:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Testing different spectroscopic techniques for the characterization
  of solar-like stars
DESCRIPTION:Testing different spectroscopic techniques for the characteriza
 tion of solar-like stars\nDr. Carlos del Burgo\n\nThe ESA's PLATO mission 
 is mainly aimed at finding exoplanets similar to Earth, orbiting around su
 n-like stars. The characterization of the planets strongly depends on that
  of their host stars. A precise determination of some fundamental stellar 
 parameters can be achieved from spectroscopic observations. High-resolutio
 n optical echelle spectra from HARPS and PEPSI were used to resemble obser
 vations at lower resolving powers R= 5000, 11 200, 20 000, and 65 000, for
  high and low signal to noise ratios, in order to establish the necessary 
 strategy to properly characterize a sample of stars. The effective tempera
 ture, metallicity, microturbulence, and surface gravity were derived from 
 different techniques based on either spectral synthesis or equivalent widt
 hs. This was performed by independent research teams belonging to the PLAT
 O consortium. For the exercise, the teams worked on the same dataset witho
 ut knowing the identity of the stars. The results obtained are compared to
  judge which techniques are the best in terms of accuracy for every resolv
 ing power. This talk summarizes the results of this blind competition.&nbs
 p;
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