Results 31 to 40 of about 35,775 (180)

Exomoons in the Habitable Zones of M Dwarfs [PDF]

The Astrophysical Journal, 2019
Abstract M dwarfs host most of the exoplanets in the local Milky Way. Some of these planets, ranging from sub-Earths to super-Jupiters, orbit in their stars’ habitable zones (HZs), although many likely possess surface environments that preclude habitability.
Héctor Martínez-Rodríguez, José Antonio Caballero, Carlos Cifuentes, Anthony L. Piro, Rory Barnes   +4 more
openaire   +4 more sources

Habitable Zones of Host Stars During the Post-MS Phase

, 2010
A star will become brighter and brighter with stellar evolution, and the distance of its habitable zone will become farther and farther. Some planets outside the habitable zone of a host star during the main sequence phase may enter the habitable zone of
A.J. Watson, A.K. Lal, A.K. Lal, A.P. Buccino, A.P. Buccino, B.W. Jones, B.W. Jones, C.A. Iglesias, D. Reimers, D. Tepfer, D.M. Williams, D.S. McKay, F. Hoyle, F. Hoyle, F. Hoyle, Fenghui Zhang, J.C. Tarter, J.F. Kasting, J.J. Eldridge, J.P. Guo, J.P. Guo, J.P. Guo, J.R. Hurley, J.T. Wickramasinghe, J.W. Ferguson, Jianpo Guo, K.-P. Schröder, M. Catelan, M. Noble, N. Grevesse, O.R. Pols, O.R. Pols, O.R. Pols, P.H. Warren, P.P. Eggleton, P.P. Eggleton, P.P. Eggleton, R. Joseph, S. Franck, S. Ida, W. Bloh von, X.F. Chen, Z.W. Han, Zhanwen Han   +43 more
core   +1 more source

Planets in habitable zones: [PDF]

Astronomy & Astrophysics, 2003
The recently discovered planetary system in the binary GamCep was studied concerning its dynamical evolution. We confirm that the orbital parameters found by the observers are in a stable configuration. The primary aim of this study was to find stable planetary orbits in a habitable region in this system, which consists of a double star (a=21.36 AU ...
Dvorak, Rudolf, Pilat-Lohinger, Elke, Funk, Barbara, Freistetter, Florian   +3 more
openaire   +3 more sources

On the timescale forcing in astrobiology [PDF]

Serbian Astronomical Journal, 2007
We investigate the effects of correlated global regulation mechanisms, especially Galactic gamma-ray bursts (GRBs), on the temporal distribution of hypothetical inhabited planets, using simple Monte Carlo numerical experiments.
Vukotić B., Ćirković M.M.
doaj   +1 more source

A New Definition of Exoplanet Habitability: Introducing the Photosynthetic Habitable Zone

The Astrophysical Journal Letters, 2023
It may be possible to detect biosignatures of photosynthesis in an exoplanet’s atmosphere. However, such a detection would likely require a dedicated study, occupying a large amount of telescope time. It is therefore prudent, while searching for signs of
C. Hall, P. C. Stancil, J. P. Terry, C. K. Ellison   +3 more
doaj   +1 more source

Water Planets in the Habitable Zone: Atmospheric Chemistry, Observable Features, and the case of Kepler-62e and -62f

, 2013
Planets composed of large quantities of water that reside in the habitable zone are expected to have distinct geophysics and geochemistry of their surfaces and atmospheres.
Kaltenegger, L., Rugheimer, S., Sasselov, D.   +2 more
core   +1 more source

Effects of Extreme Obliquity Variations on the Habitability of Exoplanets [PDF]

, 2014
We explore the impact of obliquity variations on planetary habitability in hypothetical systems with high mutual inclination. We show that large amplitude, high frequency obliquity oscillations on Earth-like exoplanets can suppress the ice-albedo ...
Armstrong, J. C., Barnes, R., Breiner, J., Domagal-Goldman, S., Meadows, V. S., Quinn, T. R.   +5 more
core   +3 more sources

GJ 832c: A SUPER-EARTH IN THE HABITABLE ZONE [PDF]

The Astrophysical Journal, 2014
We report the detection of GJ 832c, a super-Earth orbiting near the inner edge of the habitable zone of GJ 832, an M dwarf previously known to host a Jupiter analog in a nearly-circular 9.4-year orbit. The combination of precise radial-velocity measurements from three telescopes reveals the presence of a planet with a period of 35.68+/-0.03 days and ...
Wittenmyer, RA, Tuomi, M, Butler, RP, Jones, HRA, Anglada-Escudé, G, Horner, J, Tinney, CG, Marshall, JP, Carter, BD, Bailey, J, Salter, GS, O'Toole, SJ, Wright, D, Crane, JD, Schectman, SA, Arriagada, P, Thompson, I, Minniti, D, Jenkins, JS, Diaz, M   +19 more
openaire   +3 more sources

Analysis of Habitability and Stellar Habitable Zones from Observed Exoplanets

Galaxies
The investigation of exoplanetary habitability is integral to advancing our knowledge of extraterrestrial life potential and detailing the environmental conditions of distant worlds. In this analysis, we explore the properties of exoplanets situated with
Jonathan H. Jiang, Philip E. Rosen, Christina X. Liu, Qianzhuang Wen, Yanbei Chen   +4 more
doaj   +1 more source

Survival of habitable planets in unstable planetary systems

, 2016
Many observed giant planets lie on eccentric orbits. Such orbits could be the result of strong scatterings with other giant planets. The same dynamical instability that produces these scatterings may also cause habitable planets in interior orbits to ...
Carrera, Daniel, Davies, Melvyn B., Johansen, Anders   +2 more
core   +1 more source