Extrasolar "Earths" in habitable zones- targets of opportunity
| dc.creator | Jones, B. W. | |
| dc.creator | Underwood, D. R. | |
| dc.creator | Sleep, P. N. | |
| dc.date | 2003-10-10 | |
| dc.date.accessioned | 2026-07-07T02:10:18Z | |
| dc.date.available | 2026-07-07T02:10:18Z | |
| dc.description | We have shown that Earth-mass planets could survive in variously restricted regions of the habitable zones (HZs) of most of a sample of nine of the 102 main-sequence exoplanetary systems confirmed by 25 September 2003. In a preliminary extrapolation of our results to the other systems, we estimate that roughly a half of these systems could have had an Earth-mass planet confined to the HZ for at least the most recent 1000 Ma. The HZ migrates outwards during the main-sequence lifetime, and so this proportion varies with stellar age; about two thirds of the systems could have such a planet confined to the HZ for at least 1000 Ma at sometime during the main-sequence lifetime. Clearly, these systems should be high on the target list for exploration for terrestrial planets. We have reached this conclusion by launching putative Earth-mass planets in various orbits and following their fate with mixed-variable symplectic and hybrid integrators. Whether the Earth-mass planets could form in the HZs of the exoplanetary systems is an urgent question that needs further study. | |
| dc.description | 7 Pages, XIXth IAP Colloquium, Paris | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0310289 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0310289 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/6697 | |
| dc.subject | Astrophysics | |
| dc.title | Extrasolar "Earths" in habitable zones- targets of opportunity | |
| dc.type | text |