The discovery of habitable worlds is one of humanity’s greatest endeavors. So far, astrobiological studies show that liquid water is one of the most important components for the evolution of life. Its chemical properties and ability to dissolve and thus impart other substances make this component an essential part of the evolution of life.
As a result, the search for life as we know it is directly related to the search for liquid water. For remote detection of life in distant planetary systems, this means searching for planets in the so-called habitable zone. In that sense, K-dwarf stars are the perfect hosts. Unlike G-dwarfs, the habitable zone is closer, which makes detecting the planet easier using transit or radial velocity techniques. In contrast to M-dwarfs, stellar activity is much smaller, and therefore has less impact on both the detectability and true habitability of the planet.
Also, K-dwarfs are the quietest in terms of oscillations and granulation noise. Despite this, there is a dearth of planets in the habitable zone of K-dwarfs due to the lack of monitoring programs dedicated to this space parameter. In response to a call for the Calar Alto Observatory Heritage Programs, we began the first dedicated, systematic search for habitable planets around Korean dwarfs, and Korean dwarfs orbiting exoplanets (KOBE).
This survey monitors the radial velocity of 50 carefully selected K dwarfs using the CARMENES instrument over 5 semesters with an average of 90 data points per target. Based on planet occurrence rates associated with our detection limits, we would expect to find 1.68 ± 0.25 planets per star in the KOBE sample and in half of the sample we would expect to find one of those within the habitable zone. In this paper, we describe project motivation, objectives, goal selection, and initial stellar characterization.
Lillo-Box J, Santos NC, Silva AM, Barrado D, Faria J, Castro-Gonzalez A, Balsalobre-Ruza O, Morales-Calderon M, Saavedra-A, Ivory E, Sousa SG, Adibekyan V, Berihuete A, Barros SCC , Delgado-Mena E, Huelamo N, Deleuil M, Demangeon ODS, Figueira P, Grouffal S, Olive J, Azzaro M, Bergond G, A. Fernandez-Martin, D. Galadi, E. Gallego, A. Gardini, S. Gongora, A. Guijarro, I. Hermelo, P. Martin, P. Minguez, L.M. Montoya, S. Pedraz, J. I. Vico Linares
Comments: Accepted for publication in A&A. 12 pages, 9 figures, 1 table
Topics: Earth and Planetary Astrophysics (astro-ph.EP); Solar and stellar astrophysics (astro-ph.SR)
Cited as follows: arXiv: 2209.05205 [astro-ph.EP] (or arXiv: 2209.05205v1 [astro-ph.EP] for this version)
WHO: Jorge Lillo Box
[v1] Monday, September 12, 2022, 12:39:03 PM UTC (2,998 KB)
Whole sheet: https://arxiv.org/abs/2209.05205