The Astronomical JournalExoplanet systems are thought to evolve on secular timescales over billions of years. This evolution is impossible to directly observe on human timescales in most individual systems.
Stephen P. Schmidt +2 more
doaj +2 more sources
Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems [PDF]
The Astrophysical Journal, 2006 We present results of a reconnaissance for stellar companions to all 131 radial velocity-detected candidate extrasolar planetary systems known as of 2005 July 1.
D. Raghavan +6 more
semanticscholar +4 more sources
Direct discovery of the inner exoplanet in the HD 206893 system [PDF]
Hinkley, S.; Lacour, S.; Marleau, G.-D.; Lagrange, A.-M.; Wang, J. J.; Kammerer, J.; Cumming, A.; Nowak, M.; Rodet, L.; Stolker, T.; Balmer, W.-O.; Ray, S.; Bonnefoy, M.; Mollière, P.; Lazzoni, C.; Kennedy, G.; Mordasini, C.; Abuter, R.; Aigrain, S.; Amorim, A.; ... (2023). Direct discovery of the inner exoplanet in the HD 206893 system. Astronomy and astrophysics, 671, L5. EDP Sciences 10.1051/0, 2022 Aims. HD 206893 is a nearby debris disk star that hosts a previously identified brown dwarf companion with an orbital separation of ∼10 au. Long-term precise radial velocity (RV) monitoring, as well as anomalies in the system proper motion, has suggested the presence of an additional, inner companion in the system. Methods.
Sasha Hinkley +99 more
openalex +5 more sources
Multibeam Blind Search of Targeted SETI Observations toward 33 Exoplanet Systems with FAST [PDF]
Astronomical Journal, 2023 The search for extraterrestrial intelligence (SETI) is to search for technosignatures associated with extraterrestrial life, such as engineered radio signals.
Xiaolu Luan +10 more
semanticscholar +1 more source
Stellar spectral-type (mass) dependence of the dearth of close-in planets around fast-rotating stars. Architecture of Kepler confirmed single-exoplanet systems compared to star-planet evolution models [PDF]
Astronomy & Astrophysics, 2023 In 2013 a dearth of close-in planets around fast-rotating host stars was found using statistical tests on Kepler data. The addition of more Kepler and Transiting Exoplanet Survey Satellite (TESS) systems in 2022 filled this region of the diagram of ...
R. A. Garc'ia +10 more
semanticscholar +1 more source
The Mass Budgets and Spatial Scales of Exoplanet Systems and Protoplanetary Disks [PDF]
Astrophysical Journal, 2021 Planets are born from disks of gas and dust, and observations of protoplanetary disks are used to constrain the initial conditions of planet formation.
G. Mulders +3 more
semanticscholar +1 more source
The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems I: High-contrast Imaging of the Exoplanet HIP 65426 b from 2 to 16 μm [PDF]
Astrophysical Journal Letters, 2022 We present JWST Early Release Science coronagraphic observations of the super-Jupiter exoplanet, HIP 65426b, with the Near-Infrared Camera (NIRCam) from 2 to 5 μm, and with the Mid-Infrared Instrument (MIRI) from 11 to 16 μm.
A. Carter +108 more
semanticscholar +1 more source
The Science of Exoplanets and Their Systems [PDF]
Astrobiology, 2013 A scientific forum on "The Future Science of Exoplanets and Their Systems," sponsored by Europlanet and the International Space Science Institute (ISSI) and co-organized by the Center for Space and Habitability (CSH) of the University of Bern, was held during December 5 and 6, 2012, in Bern, Switzerland.
Lammer, Helmut +22 more
openaire +8 more sources
A Geologic Si‐O‐C Pathway to Incorporate Carbon in Silicates
Geophysical Monograph Series, Page 47-54., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Alexandra Navrotsky +2 more
wiley +2 more sources
Is there an exoplanet in the Solar system? [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2016 Abstract We investigate the prospects for the capture of the proposed Planet 9 from other stars in the Sun's birth cluster. Any capture scenario must satisfy three conditions: the encounter must be more distant than ∼150 au to avoid perturbing the Kuiper belt; the other star must have a wide-orbit planet (a ≳ 100 au); the planet must be ...
Mustill, Alexander J., +2 more
openaire +4 more sources