Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/206601
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | RedDots: a temperate 1.5 Earth-mass planet candidate in a compact multiterrestrial planet system around GJ 1061 |
Autor: | Dreizler, S.; Jeffers, Sandra V.; Rodríguez Martínez, Eloy CSIC ORCID ; Zechmeister, Mathias; Barnes, John R.; Haswell, C. A.; Coleman, G. A. L.; Lalitha, S.; Hidalgo Soto, D.; Strachan, J. B. P.; Hambsch, Franz-Josef; López González, Maria J. CSIC ORCID; Morales, Nicolás CSIC ORCID; Rodríguez-López, Cristina CSIC ORCID; Berdiñas, Z. M.; Ribas, Ignasi CSIC ORCID; Pallé, Enric; Reiners, Ansgar; Anglada-Escudé, Guillem CSIC ORCID | Palabras clave: | Methods: data analysis Techniques: radial velocities Stars: individual: GJ 1061 Stars: late-type Planetary systems |
Fecha de publicación: | 2020 | Editor: | Oxford University Press | Citación: | Monthly Notices of the Royal Astronomical Society 493(1): 536-550 (2020) | Resumen: | Small low-mass stars are favourable targets for the detection of rocky habitable planets. In particular, planetary systems in the solar neighbourhood are interesting and suitable for precise characterization. The RedDots campaigns seek to discover rocky planets orbiting nearby low-mass stars. The 2018 campaign targeted GJ 1061, which is the 20th nearest star to the Sun. For three consecutive months we obtained nightly, high-precision radial velocity measurements with the HARPS spectrograph. We analysed these data together with archival HARPS data. We report the detection of three planet candidates with periods of 3.204 +/- 0.001, 6.689 +/- 0.005, and 13.03 +/- 0.03 d, which are close to 1:2:4 period commensurability. After several considerations related to the properties of the noise and sampling, we conclude that a fourth signal is most likely explained by stellar rotation, although it may be due to a planet. The proposed three-planet system (and the potential four-planet solution) is long-term dynamically stable. Planet-planet gravitational interactions are below our current detection threshold. The minimum masses of the three planets range from 1.4 +/- 0.2 to 1.8 +/- 0.3 M-circle plus. Planet d, with msin i = 1.64 +/- 0.24 M-circle plus, receives a similar amount of energy as Earth receives from the Sun. Consequently it lies within the liquid-water habitable zone of the star and has a similar equilibrium temperature to Earth. GJ 1061 has very similar properties to Proxima Centauri but activity indices point to lower levels of stellar activity.C 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society | Versión del editor: | http://dx.doi.org/10.1093/mnras/staa248 | URI: | http://hdl.handle.net/10261/206601 | DOI: | 10.1093/mnras/staa248 | ISSN: | 0035-8711 |
Aparece en las colecciones: | (IAA) Artículos (ICE) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
IAA_2020staa248.pdf | 24,9 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
34
checked on 17-abr-2024
WEB OF SCIENCETM
Citations
33
checked on 29-feb-2024
Page view(s)
189
checked on 26-abr-2024
Download(s)
194
checked on 26-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.