Results 81 to 90 of about 71,492 (285)

MHD Study of Extreme Space Weather Conditions for Exoplanets With Earth‐Like Magnetospheres: On Habitability Conditions and Radio‐Emission

Space Weather, 2022
The present study aims at characterizing the habitability conditions of exoplanets with an Earth‐like magnetosphere inside the habitable zone of M and F stars, caused by the direct deposition of the stellar wind on the exoplanet surface.
J. Varela, A. S. Brun, P. Zarka, A. Strugarek, F. Pantellini, V. Réville   +5 more
doaj   +1 more source

The atmospheres of rocky exoplanets [PDF]

Astronomy & Astrophysics, 2020
Context. Little is known about the interaction between atmospheres and crusts of exoplanets so far, but future space missions and ground-based instruments are expected to detect molecular features in the spectra of hot rocky exoplanets. Aims.
O. Herbort, P. Woitke, Ch. Helling, A. Zerkle   +3 more
semanticscholar   +1 more source

Commissioning an Inexpensive Off‐The‐Shelf Spectrograph for Radial‐Velocity Studies

Astronomische Nachrichten, EarlyView.
ABSTRACT We present a way to set up an inexpensive out of the shelf spectrograph at a local observatory. Stability and resolution of the spectrograph are high enough for radial velocity determination of binary stars or determination of stellar characteristics. Even some exoplanets might be detectable via the radial velocity method.
Lukas Stock, Andreas Schrimpf
wiley   +1 more source

Characterizing exoplanets [PDF]

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2014
International ...
Miller, Steve, Coustenis, Athéna, Read, P., Tennyson, Jonathan   +3 more
openaire   +2 more sources

Classifying Exoplanets with a Gaussian Mixture Model

The Open Journal of Astrophysics, 2018
Recently, Odrzywolek and Rafelski have found three distinct categories of exoplanets, when they are classified based on density. We first carry out a similar classification of exoplanets according to their density using the Gaussian Mixture Model ...
Soham Kulkarni, Shantanu Desai
doaj   +1 more source

Tidal locking of habitable exoplanets [PDF]

Celestial mechanics & dynamical astronomy, 2017
Potentially habitable planets can orbit close enough to their host star that the differential gravity across their diameters can produce an elongated shape. Frictional forces inside the planet prevent the bulges from aligning perfectly with the host star
R. Barnes
semanticscholar   +1 more source

Out There No One Has a Right to Die

Bioethics, EarlyView.
ABSTRACT The eventual goal of space exploration is to colonize exoplanets and their moons outside our solar system. This is a dangerous and immoral endeavour. The extraterrestrial life forms encountered would be hostile, vulnerable or both, and the descendants of the original pioneers would be involuntarily exposed to hazardous conditions and ...
Matti Häyry
wiley   +1 more source

Stellar Coronal and Wind Models: Impact on Exoplanets

, 2017
Surface magnetism is believed to be the main driver of coronal heating and stellar wind acceleration. Coronae are believed to be formed by plasma confined in closed magnetic coronal loops of the stars, with winds mainly originating in open magnetic field
A Maggio, A Morgenthaler, A Morgenthaler, A Reiners, A Reiners, A Reiners, A Strugarek, A Telleschi, A. Skumanich, AA Pevtsov, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA Vidotto, AA West, AF Lanza, B Holst van der, B Holst van der, B Zieger, BA Nicholson, BE Wood, BE Wood, BE Wood, BE Wood, BE Wood, BJ Wargelin, BO Demory, C Catala, C Garraffo, C Johnstone, C. P. Johnstone, CM Johns-Krull, CM Johns-Krull, CP Folsom, CP Johnstone, CP Johnstone, D Arzoumanian, D Bisikalo, D Buzasi, D Falceta-Gonçalves, D Lai, E Shkolnik, EF Guinan, EJ Gaidos, F Bagenal, G Anglada-Escudé, G Scandariato, GAJ Hussain, GAJ Hussain, GAJ Hussain, GHJ Oord van den, GW Pneuman, H Lammer, H Lammer, H Washimi, I Baraffe, I Pillitteri, I Ribas, I. Ribas, IA Waite, IA Waite, IA Waite, Ignasi Ribas, IV Sokolov, J Donati, J Donati, J Donati, J Donati, J Llama, J Morin, J Morin, J Morin, J Morin, J Sanz-Forcada, J Zendejas, Jackie Villadsen, JD Alvarado-Gómez, Jeremy Lim, JF Donati, JF Donati, JF Donati, JF Donati, JF Donati, JF Donati, JF Donati, JF Donati, JF Donati, JF Donati, JH Debes, JI Zuluaga, JJG Lima, JM Grießmeier, JM Grießmeier, JV Hollweg, K Tsinganos, KG Kislyakova, L Hartmann, L. Mestel, M Guedel, M Guedel, M Güdel, M Jardine, M Jardine, MG Sterenborg, ML Khodachenko, ML Khodachenko, N Pizzolato, NJ Wright, O Cohen, O Cohen, O. Cohen, O. Cohen, P Lang, P Petit, P Petit, P Testa, R Fares, R Fares, R Fares, R Fares, R Keppens, R Pallavicini, RD Jeffries, Robert P. Kraft, Rui F. Pinto, RVE Lovelace, S Boro Saikia, S Boro Saikia, S Matt, S. V. Jeffers, SC Marsden, SC Marsden, SG Parsons, SH Yang, SK Solanki, SL Li, SP Matt, SR Cranmer, SR Cranmer, T Matsakos, T Matsumoto, Takuma Matsumoto, TE Holzer, Theresa Lüftinger, TK Suzuki, V Jatenco-Pereira, V Réville, V See, V. Bourrier, V. Bourrier, WH Ip   +162 more
core   +1 more source

Assessing the Possibility of Biological Complexity on Other Worlds, with an Estimate of the Occurrence of Complex Life in the Milky Way Galaxy

Challenges, 2014
Rational speculation about biological evolution on other worlds is one of the outstanding challenges in astrobiology. With the growing confirmation that multiplanetary systems abound in the universe, the prospect that life occurs redundantly throughout ...
Louis N. Irwin, Abel Méndez, Alberto G. Fairén, Dirk Schulze-Makuch   +3 more
doaj   +1 more source

Identifying Exoplanets with Deep Learning: A Five-planet Resonant Chain around Kepler-80 and an Eighth Planet around Kepler-90 [PDF]

, 2017
NASA’s Kepler Space Telescope was designed to determine the frequency of Earth-sized planets orbiting Sun-like stars, but these planets are on the very edge of the mission’s detection sensitivity.
Christopher J. Shallue, A. Vanderburg
semanticscholar   +1 more source