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• W3100460252 abstract "The determination of extrasolar planet masses with the radial velocity (RV) technique requires spectroscopic Doppler information from the planet's host star, which varies with stellar brightness and temperature. We analyze Doppler information in spectra of F--M dwarfs utilizing empirical information from HARPS and CARMENES, and from model spectra. We come to the conclusions that an optical setup ($BVR$-bands) is more efficient that a near-infrared one ($YJHK$) in dwarf stars hotter than 3200,K. We publish a catalogue of 46,480 well-studied F--M dwarfs in the solar neighborhood and compare their distribution to more than one million stars from Gaia DR2. For all stars, we estimate the RV photon noise achievable in typical observations assuming no activity jitter and slow rotation. We find that with an ESPRESSO-like instrument at an 8m-telescope, a photon noise limit of 10,cm,s$^{-1}$ or lower can be reached in more than 280 stars in a 5,min observation. At 4m-telescopes, a photon noise limit of 1,m,s$^{-1}$ can be reached in a 10,min exposure in approx. 10,000 predominantly sun-like stars with a HARPS-like (optical) instrument. The same applies to $sim$3000 stars for a red-optical setup covering the $RIz$-bands, and to $sim$700 stars for a near-infrared instrument. For the latter two, many of the targets are nearby M dwarfs. Finally, we identify targets in which Earth-mass planets within the liquid water habitable zone can cause RV amplitudes comparable to the RV photon noise. Assuming the same exposure times, we find that an ESPRESSO-like instrument can reach this limit for 1,M$_Earth$ planets in more than 1000 stars. The optical, red-optical, and near-infrared configurations reach the limit for 2,M$_Earth$ planets in approximately 500, 700, and 200 stars, respectively." @default.
• W3100460252 created "2020-11-23" @default.
• W3100460252 creator A5003134253 @default.
• W3100460252 creator A5071382491 @default.
• W3100460252 date "2020-02-20" @default.
• W3100460252 modified "2023-10-17" @default.
• W3100460252 title "Radial Velocity Photon Limits for the Dwarf Stars of Spectral Classes F–M" @default.
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• W3100460252 doi "https://doi.org/10.3847/1538-4365/ab609f" @default.
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