Open Access#12015
Conserving the Conservator
This paper examines the extent of the legal responsibility the conservator has within the context of this legislation and the various options available to the conservator to protect themselves
Suchergebnisse
Filter
2 Ergebnisse
Sortierung:
BASE
Open Access#22020
A multiplanet system of super-Earths orbiting the brightest red dwarf star GJ 887
Jeffers, S. V; Dreizier, S; Barnes, J. R; Haswell, C. A; Nelson, R. P; Rodríguez, E; López González, M. J; Morales, N
Jeffers, S. V; Dreizier, S; Barnes, J. R; Haswell, C. A; Nelson, R. P; Rodríguez, E; López González, M. J; Morales, N; Luque, R; Zechmeister, M; Vogt, S. S; Jenkins, James Stewart; Palle, E; Berdinas, Z. M; Coleman, G; Díaz, M. R; Ribas, I; Jones, H.R.A; Butler, R. P; Tinney, C. G; Bailey, J; Carter, B. D; O'Toole, S; Wittenmyer, R. A; Crane, J. D; Feng, F; Shectman, S. A; Teske, J; Reiners, A; Amado, P. J; Anglada Escude, G
The closet exoplanets to the Sun provide opportunities for detailed characterization of planets outside the Solar System. We report the discovery, using radial velocity measurements, of a compact multiplanet system of super-Earth exoplanets orbiting the nearby red dwarf star GJ 887. The two planets have orbital periods of 9.3 and 21.8 days. Assuming an Earth-like albedo, the equilibrium temperature of the 21.8-day planet is similar to 350 kelvin. The planets are interior to, but close to the inner edge of, the liquid-water habitable zone. We also detect an unconfirmed signal with a period of similar to 50 days, which could correspond to a third super-Earth in a more temperate orbit. Our observations show that GJ 887 has photometric variability below 500 parts per million, which is unusually quiet for a red dwarf. ; German Research Foundation (DFG) FOR2544 JE 701/3-1 German Research Foundation (DFG) SPP 1992 JE 701/5-1 Science & Technology Facilities Council (STFC) ST/P000584/1 ST/T000295/1 ST/P000592/1 Spanish Agencia Estatal de Investigacion AYA2017-89637R AYA2016-79425-C3-3-S ESP2017-87676-C5-2-R ESP2017-87143R PGC2018-098153-B-C31 ESP2016-80435-C2-2-R Centre of Excellence "Severo Ochoa" Instituto de Astrofisica de Andalucia SEV-2017-0709 Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) CONICYT FONDECYT 3180405 Swiss National Science Foundation (SNSF) CONICYT/PFCHA-Doctorado Nacional, Chile 21140646 Spanish Government ESP2016-80435-C2-1-R PGC2018-098153-B-C33 European Union (EU) ESP2016-80435-C2-1-R PGC2018-098153-B-C33 Generalitat de Catalunya/CERCA program Science & Technology Facilities Council (STFC) ST/M001008/1 Australian Research Council DP0774000 DP130102695 DP170103491 NASA through Hubble Fellowship - Space Telescope Science Institute HST-HF2-51399.001 Ministerio de Ciencia, Innovacion y Universidades Ramon y Cajal fellowship RYC-2017-22489 Science & Technology Facilities Council (STFC) ST/P000592/1 National Aeronautics & Space Administration (NASA) NAS5-26555
BASE