The LCES HIRES/Keck Precision Radial Velocity Exoplanet Survey

التفاصيل البيبلوغرافية
العنوان: The LCES HIRES/Keck Precision Radial Velocity Exoplanet Survey
المؤلفون: Jennifer Burt, Matías R. Díaz, Eugenio J. Rivera, Mikko Tuomi, Sandy Keiser, Johanna Teske, Steven S. Vogt, Gregory Laughlin, Pamela Arriagada, R. Paul Butler, Brad Holden
سنة النشر: 2017
مصطلحات موضوعية: Physics, Earth and Planetary Astrophysics (astro-ph.EP), 010504 meteorology & atmospheric sciences, Minimum mass, Astronomy, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Planetary system, Orbital period, 01 natural sciences, Exoplanet, Radial velocity, Stars, Space and Planetary Science, Planet, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, 010303 astronomy & astrophysics, Main sequence, Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences, Astrophysics - Earth and Planetary Astrophysics
الوصف: We describe a 20-year survey carried out by the Lick-Carnegie Exoplanet Survey Team (LCES), using precision radial velocities from HIRES on the Keck-I telescope to find and characterize extrasolar planetary systems orbiting nearby F, G, K, and M dwarf stars. We provide here 60,949 precision radial velocities for 1,624 stars contained in that survey. We tabulate a list of 357 significant periodic signals that are of constant period and phase, and not coincident in period and/or phase with stellar activity indices. These signals are thus strongly suggestive of barycentric reflex motion of the star induced by one or more candidate exoplanets in Keplerian motion about the host star. Of these signals, 225 have already been published as planet claims, 60 are classified as significant unpublished planet candidates that await photometric follow-up to rule out activity-related causes, and 54 are also unpublished, but are classified as "significant" signals that require confirmation by additional data before rising to classification as planet candidates. Of particular interest is our detection of a candidate planet with a minimum mass of 3.9 Earth masses and an orbital period of 9.9 days orbiting Lalande 21185, the fourth-closest main sequence star to the Sun. For each of our exoplanetary candidate signals, we provide the period and semi-amplitude of the Keplerian orbital fit, and a likelihood ratio estimate of its statistical significance. We also tabulate 18 Keplerian-like signals that we classify as likely arising from stellar activity.
Accepted for publication in The Astronomical Journal. Paper data available at: http://home.dtm.ciw.edu/ebps/data/
اللغة: English
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0999c1b7898f93611f114572a99d2f1f
http://arxiv.org/abs/1702.03571
حقوق: OPEN
رقم الأكسشن: edsair.doi.dedup.....0999c1b7898f93611f114572a99d2f1f
قاعدة البيانات: OpenAIRE