2023
DOI: 10.1017/s1473550423000046
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Presence of liquid water during the evolution of exomoons orbiting ejected free-floating planets

Abstract: Free-floating planets (FFPs) can result from dynamical scattering processes happening in the first few million years of a planetary system's life. Several models predict the possibility, for these isolated planetary-mass objects, to retain exomoons after their ejection. The tidal heating mechanism and the presence of an atmosphere with a relatively high optical thickness may support the formation and maintenance of oceans of liquid water on the surface of these satellites. In order to study the timescales over… Show more

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Cited by 2 publications
(3 citation statements)
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“…An already propagating naming convention is that if a companion is so large that it is just a few factors smaller than the host planet, it can also be named "binary planets" [22]. There could also be moons orbiting free-floating exoplanets, as suggested by [23,24].…”
Section: Introductionmentioning
confidence: 99%
“…An already propagating naming convention is that if a companion is so large that it is just a few factors smaller than the host planet, it can also be named "binary planets" [22]. There could also be moons orbiting free-floating exoplanets, as suggested by [23,24].…”
Section: Introductionmentioning
confidence: 99%
“…The upper bound is approximately the limit beyond which few rocky worlds exist based on exoplanet surveys [29,30,31]. Moreover, roughly Earth-sized and larger rogue worlds have the capacity to host liquid oceans on their surface (up to Gyr timescales) from a combination of primordial and radiogenic heat; this hydrosphere can be present in the surface [32,33,34,35,36,37,38] or subsurface [39,40,41]. We exclude giant planet analogs, not only because they are rarer (as outlined later in Section 2.1) but also since their habitability potential is indeterminate, notwithstanding several publications on hypothetical pathways to abiogenesis on these worlds [42,43,44,45,46,47]; in addition, they are not likely to be found close enough to the Earth for pursuing near term in situ exploration.…”
Section: Introductionmentioning
confidence: 99%
“…The habitability of nomadic worlds remains indeterminate, although a plethora of publications have identified possible avenues whereby these objects could be rendered suitable for hosting life [67,42,32,68,69,39,33,70,40,46,71,35,41,72,37,73,36,74,38]. Hence, detecting and characterizing a nomadic world in the above size range would accord us a unique opportunity to gauge whether such abodes constitute viable habitats for life, evaluate our understanding of habitability, and determine whether prebiotic molecules and/or organisms may be transported across interstellar distances [75,76,77,58,71,73].…”
Section: Introductionmentioning
confidence: 99%