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Earth-like habitats in planetary systems

Fritz, J. and Bitsch, B and Kührt, E. and Morbidelli, A. and Tornow, Carmen and Wünnemann, K. and Fernandes, V. and Grenfell, J L and Rauer, H and Wagner, R. and Werner, S. (2014) Earth-like habitats in planetary systems. Planetary and Space Science, 98, pp. 254-267. Elsevier. doi: 10.1016/j.pss.2014.03.003. ISSN 0032-0633.

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Understanding the concept of habitability is clearly related to an evolutionary knowledge of the particular planet-in-question. However, additional indications so-called “systemic aspects” of the planetary system as a whole governs a particular planet׳s claim on habitability. In this paper we focus on such systemic aspects and discuss their relevance to the formation of an “Earth-like” habitable planet. This contribution summarizes our results obtained by lunar sample work and numerical models within the framework of the Research Alliance “Planetary Evolution and Life”. We consider various scenarios which simulate the dynamical evolution of the Solar System and discuss the consequences for the likelihood of forming an Earth-like world orbiting another star. Our model approach is constrained by observations of the modern Solar System and the knowledge of its history. Results suggest that on the one hand the long-term presence of terrestrial planets is jeopardized due to gravitational interactions if giant planets are present. On the other hand the habitability of inner rocky planets may be supported in those planetary systems hosting giant planets. Gravitational interactions within a complex multiple-body structure including giant planets may supply terrestrial planets with materials which formed in the colder region of the proto-planetary disk. During these processes, water, the prime requisite for habitability, is delivered to the inner system. This may occur either during the main accretion phase of terrestrial planets or via impacts during a post-accretion bombardment. Results for both processes are summarized and discussed with reference to the lunar crater record. Starting from a scenario involving migration of the giant planets this contribution discusses the delivery of water to Earth, the modification of atmospheres by impacts in a planetary system context and the likelihood of the existence of extrasolar Earth-like habitable worlds.

Item URL in elib:https://elib.dlr.de/90884/
Document Type:Article
Title:Earth-like habitats in planetary systems
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Fritz, J.Naturkundemuseum, BerlinUNSPECIFIED
Bitsch, BObservatoire de la Côte d’Azur, Nice, FranceUNSPECIFIED
Kührt, E.ekkehard.kuehrt (at) dlr.deUNSPECIFIED
Morbidelli, A.OCA, NiceUNSPECIFIED
Tornow, Carmencarmen.tornow (at) dlr.deUNSPECIFIED
Wünnemann, K.Museum für NaturkundeUNSPECIFIED
Fernandes, V.CREMINER LA/ISL, Univ. Lisbon, Portugal; Univ. Manchester, UK; Univ. Bern, SwitzerlandUNSPECIFIED
Grenfell, J LLee.Grenfell (at) dlr.deUNSPECIFIED
Rauer, Hheike.rauer (at) dlr.deUNSPECIFIED
Wagner, R.roland.wagner (at) dlr.deUNSPECIFIED
Journal or Publication Title:Planetary and Space Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.pss.2014.03.003
Page Range:pp. 254-267
Keywords:Planetary system formation; Habitability; Impact; Exoplanets; Solar system chronology
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Projekt COROT Beteiligung (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Institute of Planetary Research > Asteroids and Comets
Institute of Planetary Research > Planetary Geology
Deposited By: Stiebeler, Ulrike
Deposited On:06 Oct 2014 09:21
Last Modified:13 Jan 2015 08:19

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