Speckle Observations of TESS Exoplanet Host Stars. II. Stellar Companions at 1–1000 au and Implications for Small Planet Detection [PDF]
Astronomical Journal, 2021 We present high-angular-resolution imaging observations of 517 host stars of TESS exoplanet candidates using the ‘Alopeke and Zorro speckle cameras at Gemini North and South.
K. Lester +9 more
semanticscholar +1 more source
The Coming Emptiness: On the Meaning of the Emptiness of the Universe in Natural Philosophy
Philosophies, 2018 The cosmological relevance of emptiness—that is, space without bodies—is not yet sufficiently appreciated in natural philosophy. This paper addresses two aspects of cosmic emptiness from the perspective of natural philosophy: the distances to
Gregor Schiemann
doaj +1 more source
Frontiers in Astronomy and Space Sciences, 2021 Starting in 2008, NASA has provided the exoplanet community an observational program aimed at obtaining the highest resolution imaging available as part of its mission to validate and characterize exoplanets, as well as their stellar environments, in ...
Steve B. Howell +7 more
doaj +1 more source
The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics from 10 to 100 au [PDF]
Astronomical Journal, 2019 We present a statistical analysis of the first 300 stars observed by the Gemini Planet Imager Exoplanet Survey. This subsample includes six detected planets and three brown dwarfs; from these detections and our contrast curves we infer the underlying ...
E. Nielsen +65 more
semanticscholar +1 more source
A nearby transiting rocky exoplanet that is suitable for atmospheric investigation [PDF]
Science, 2021 A transiting rocky planet 8 parsecs away Most exoplanets have been detected using either the radial velocity (RV) method or the transit method, which provide only limited information on the planet's physical properties.
T. Trifonov +68 more
semanticscholar +1 more source
First results of the Kourovka Planet Search: discovery of transiting exoplanet candidates in the first three target fields [PDF]
, 2016 We present the first results of our search for transiting exoplanet candidates as part of the Kourovka Planet Search (KPS) project. The primary objective of the project is to search for new hot Jupiters which transit their host stars, mainly in the ...
Balega, Yuri Yu. +19 more
core +1 more source
HD3651B: the first directly imaged brown dwarf companion of an exoplanet host star [PDF]
, 2006 In the course of our ongoing multiplicity study of exoplanet host stars we detected a faint companion located at ~43arcsec (480AU physical projected separation) north-west of its primary -- the exoplanet host star HD3651 at 11pc.
Mazeh, T. +3 more
core +3 more sources
Exploring and Validating Exoplanet Atmospheric Retrievals with Solar System Analog Observations
The Planetary Science Journal, 2023 Solar system observations that serve as analogs for exoplanet remote sensing data can provide important opportunities to validate ideas and models related to exoplanet environments.
Tyler D. Robinson, Arnaud Salvador
doaj +1 more source
A Stellar Mass Dependence of Structured Disks: A Possible Link with Exoplanet Demographics [PDF]
, 2021 Gaps in protoplanetary disks have long been hailed as signposts of planet formation. However, a direct link between exoplanets and disks remains hard to identify.
N. van der Marel, G. Mulders
semanticscholar +1 more source
Exoplanet albedo spectra and colors as a function of planet phase, separation, and metallicity [PDF]
, 2010 First generation optical coronagraphic telescopes will obtain images of cool gas and ice giant exoplanets around nearby stars. The albedo spectra of exoplanets at planet-star separations larger than about 1 AU are dominated by reflected light to beyond 1
Ackerman +58 more
core +2 more sources