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dc.date.accessioned | 2019-11-20T13:20:10Z | |
dc.date.available | 2019-11-20T13:20:10Z | |
dc.date.issued | 2016 | |
dc.identifier.uri | http://sedici.unlp.edu.ar/handle/10915/85757 | |
dc.description.abstract | Context. Theoretical and observational studies suggest that protoplanetary disks with a wide range of masses could be found around low-mass stars. Aims. We analyze planetary formation processes in systems without gas giants around M3- and M0-type stars of 0.29 M⊙ and 0.5 M⊙, respectively. In particular, we assume disks with masses of 5% and 10% of the mass of the star. Our study focuses on the formation of terrestrial-like planets and water delivery in the habitable zone (HZ). Methods. First, we use a semi-analytical model to describe the evolution of embryos and planetesimals during the gaseous phase. Then, a N-body code is used to analyze the last giant impact phase after the gas dissipation. Results. For M3-type stars, five planets with different properties are formed in the HZ. These planets have masses of 0.072 M⊕, ∼0.13 M⊕ (two of them), and 1.03 M⊕, and have water contents of 5.9%, 16.7%, 28.6%, and 60.6% by mass, respectively. Then, the fifth planet formed in the HZ is a dry world with 0.138 M⊕. For M0-type stars, four planets are produced in the HZ with masses of 0.28 M⊕, 0.51 M⊕, 0.72 M⊕, and 1.42 M⊕, and they have water contents of 26.7%, 45.8%, 68%, and 50.5% by mass, respectively. Conclusions. M3- and M0-type stars represent targets of interest for the search of exoplanets in the HZ. In fact, the Mars-mass planets formed around M3-type stars could maintain habitable conditions in their early histories. Thus, the search for candidates around young M3-type stars could lead to the detection of planets analogous to early Mars. Moreover, Earth-mass planets should also be discovered around M3-type stars and, sub- and super-Earths should be detected around M0-type stars. Such planets are very interesting since they could maintain habitable conditions for very long. | en |
dc.language | en | es |
dc.subject | Astrobiology | es |
dc.subject | Methods: numerical | es |
dc.subject | Protoplanetary disks | es |
dc.title | Terrestrial planets and water delivery around low-mass stars | en |
dc.type | Articulo | es |
sedici.identifier.other | doi:10.1051/0004-6361/201628355 | es |
sedici.identifier.other | eid:2-s2.0-85000613652 | es |
sedici.identifier.issn | 0004-6361 | es |
sedici.creator.person | Dugaro, Agustín | es |
sedici.creator.person | Elía, Gonzalo Carlos de | es |
sedici.creator.person | Brunini, Adrián | es |
sedici.creator.person | Guilera, Octavio Miguel | es |
sedici.subject.materias | Ciencias Astronómicas | es |
sedici.description.fulltext | true | es |
mods.originInfo.place | Facultad de Ciencias Astronómicas y Geofísicas | es |
mods.originInfo.place | Instituto de Astrofísica de La Plata | es |
sedici.subtype | Articulo | es |
sedici.rights.license | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
sedici.rights.uri | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
sedici.description.peerReview | peer-review | es |
sedici.relation.journalTitle | Astronomy and Astrophysics | es |
sedici.relation.journalVolumeAndIssue | vol. 596 | es |
sedici.rights.sherpa | * Color: green * Pre-print del autor: can * Post-print del autor: can * Versión de editor/PDF:can * Condiciones: >>On author's personal website or institutional website or OAI compliant website >>Some journals require an embargo for deposit in funder's designated repositories (see journal) >>Publisher's version/PDF may be used (see journal) >>Must link to publisher version >>Publisher copyright and source must be acknowledged >>Non-commercial * Link a Sherpa: http://sherpa.ac.uk/romeo/issn/0004-6361/es/ |