Suchergebnisse

International audience ; After the success of the 1st edition of Montpellier in 2016, CIHEAM organized the 2nd edition of the Mediterranean initiative for PhD students and young researchers (MedForum2018) at CIHEAM Bari (Italy) from 18 to 20 September 2018. MedForum2018, entitled "Research and Innovation: Tools for Sustainable Agriculture and Food Security", focused on the CIHEAM Strategic Agenda 2025 (CAPMED2025) and its Action Plan developed for the implementation of the United-Nations 2030 Agenda for Sustainable Development, in specific fields across the Mediterranean area. Through research work of PhD students and young researchers, MedForum2018 aimed at: - Fostering entrepreneurship, women and youth employment; - Identifying and sharing potential innovation tools geared towards integrated solutions for sustainable agriculture, food and nutrition security; - Enhancing research and innovation impact at national and regional level; - Proposing alternatives to prevent young researchers' migrations. MedForum2018 was organized by CIHEAM in partnership with MAECI-Italy (Ministry of Foreign Affairs and International Cooperation), CMI (Center for Mediterranean Integration of the World Bank), UfM (Union for the Mediterranean), Agreenium (Institut Agronomique, Vétérinaire et Forestier de France) and with the technical collaboration of the Food and Agriculture Organization of the United Nations (FAO).

International audience ; After the success of the 1st edition of Montpellier in 2016, CIHEAM organized the 2nd edition of the Mediterranean initiative for PhD students and young researchers (MedForum2018) at CIHEAM Bari (Italy) from 18 to 20 September 2018. MedForum2018, entitled "Research and Innovation: Tools for Sustainable Agriculture and Food Security", focused on the CIHEAM Strategic Agenda 2025 (CAPMED2025) and its Action Plan developed for the implementation of the United-Nations 2030 Agenda for Sustainable Development, in specific fields across the Mediterranean area. Through research work of PhD students and young researchers, MedForum2018 aimed at: - Fostering entrepreneurship, women and youth employment; - Identifying and sharing potential innovation tools geared towards integrated solutions for sustainable agriculture, food and nutrition security; - Enhancing research and innovation impact at national and regional level; - Proposing alternatives to prevent young researchers' migrations. MedForum2018 was organized by CIHEAM in partnership with MAECI-Italy (Ministry of Foreign Affairs and International Cooperation), CMI (Center for Mediterranean Integration of the World Bank), UfM (Union for the Mediterranean), Agreenium (Institut Agronomique, Vétérinaire et Forestier de France) and with the technical collaboration of the Food and Agriculture Organization of the United Nations (FAO).

Context. The existence of hot Jupiters is still not well understood. Two main channels are thought to be responsible for their current location: a smooth planet migration through the protoplanetary disk or the circularization of an initial highly eccentric orbit by tidal dissipation leading to a strong decrease in the semimajor axis. Different formation scenarios result in different observable effects, such as orbital parameters (obliquity and eccentricity) or frequency of planets at different stellar ages. Aims. In the context of the GAPS Young Objects project, we are carrying out a radial velocity survey with the aim of searching and characterizing young hot-Jupiter planets. Our purpose is to put constraints on evolutionary models and establish statistical properties, such as the frequency of these planets from a homogeneous sample. Methods. Since young stars are in general magnetically very active, we performed multi-band (visible and near-infrared) spectroscopy with simultaneous GIANO-B + HARPS-N (GIARPS) observing mode at TNG. This helps in dealing with stellar activity and distinguishing the nature of radial velocity variations: stellar activity will introduce a wavelength-dependent radial velocity amplitude, whereas a Keplerian signal is achromatic. As a pilot study, we present here the cases of two known hot Jupiters orbiting young stars: HD 285507 b and AD Leo b. Results. Our analysis of simultaneous high-precision GIARPS spectroscopic data confirms the Keplerian nature of the variation in the HD 285507 radial velocities and refines the orbital parameters of the hot Jupiter, obtaining an eccentricity consistent with a circular orbit. Instead, our analysis does not confirm the signal previously attributed to a planet orbiting AD Leo. This demonstrates the power of the multi-band spectroscopic technique when observing active stars. ; With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737)

This paper reports on the detailed characterization of the K2-111 planetary system with K2, WASP, and ASAS-SN photometry, as well as high-resolution spectroscopic data from HARPS-N and ESPRESSO. The host, K2-111, is confirmed to be a mildly evolved (log g = 4.17), iron-poor ([Fe/H] = -0.46), but alpha-enhanced ([α/Fe]=0.27), chromospherically quiet, very old thick disc G2 star. A global fit, performed by using PyORBIT, shows that the transiting planet, K2-111 b, orbits with a period Pb = 5.3518 ± 0.0004 d and has a planet radius of 1.82+0.11-0.09 R⊙ and a mass of 5.29+0.76-0.77 M⊙, resulting in a bulk density slightly lower than that of the Earth. The stellar chemical composition and the planet properties are consistent with K2-111 b being a terrestrial planet with an iron core mass fraction lower than the Earth. We announce the existence of a second signal in the radial velocity data that we attribute to a non-transiting planet, K2-111 c, with an orbital period of 15.6785 ± 0.0064 d, orbiting in near-3:1 mean motion resonance with the transiting planet, and a minimum planet mass of 11.3 ± 1.1 M⊙. Both planet signals are independently detected in the HARPS-N and ESPRESSO data when fitted separately. There are potentially more planets in this resonant system, but more well-sampled data are required to confirm their presence and physical parameters. ; With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737)