Results 11 to 20 of about 23,438 (217)

Spectroscopic Follow-up of Gaia Exoplanet Candidates: Impostor Binary Stars Invade the Gaia DR3 Astrometric Exoplanet Candidates

open access: yesThe Astronomical Journal, 2023
In this paper, we report on the follow-up of six potential exoplanets detected with Gaia astrometry and provide an overview of what is currently known about the nature of the entire Gaia astrometric exoplanet candidate sample, 72 systems in total.
Marcus L. Marcussen, Simon H. Albrecht
doaj   +1 more source

Hot super-Earths stripped by their host stars

open access: yesNature Communications, 2016
Theory predicts a deficit of super-Earth sized planets, which orbit close to their host star. Here, Lundkvist et al. use data from the NASA Kepler mission to show that this deficit is also seen in observations, thereby providing new insight into ...
M. S. Lundkvist   +28 more
doaj   +1 more source

Databases of Publications and Observations as a Part of the Crimean Astronomical Virtual Observatory

open access: yesOpen Astronomy, 2015
We describe the main principles of formation of databases (DBs) with information about astronomical objects and their physical characteristics derived from observations obtained at the Crimean Astrophysical Observatory (CrAO) and published in the ...
Shlyapnikov A.   +2 more
doaj   +1 more source

The Advanced Spectral Library: The Evolution of Chromospheric Wind Characteristics from Noncoronal to Hybrid Giant Stars

open access: yesThe Astrophysical Journal, 2023
The Hubble Space Telescope (HST)/Space Telescope Imaging Spectrograph treasury program Advanced Spectral Library enables investigations of the characteristics and dynamics of the wind and chromosphere of cool stars using high-quality spectral data.
Krister E. Nielsen   +3 more
doaj   +1 more source

An Algorithm for Affordable Vision-Based GNSS-Denied Strapdown Celestial Navigation

open access: yesDrones
Celestial navigation is rarely seen in modern Uncrewed Aerial Vehicles (UAVs). The size and weight of a stabilized imaging system, and the lack of precision, tend to be at odds with the operational requirements of the aircraft.
Samuel Teague, Javaan Chahl
doaj   +1 more source

Interstellar Propulsion Using Laser-Driven Inertial Confinement Fusion Physics

open access: yesUniverse, 2022
To transport a spacecraft to distances far beyond the solar heliosphere and around the planets of other stars will require advanced space propulsion systems that go beyond the existing technological state of the art. The release of fusion energy from the
Kelvin F. Long
doaj   +1 more source

What asteroseismology can do for exoplanets

open access: yesEPJ Web of Conferences, 2015
We describe three useful applications of asteroseismology in the context of exoplanet science: (1) the detailed characterisation of exoplanet host stars; (2) the measurement of stellar inclinations; and (3) the determination of orbital eccentricity from ...
Van Eylen Vincent   +14 more
doaj   +1 more source

A Hierarchical Bayesian Framework for Inferring the Stellar Obliquity Distribution

open access: yesThe Astronomical Journal, 2023
Stellar obliquity, the angle between a planet’s orbital axis and its host star’s spin axis, traces the formation and evolution of a planetary system. In transiting-exoplanet observations, only the sky-projected stellar obliquity can be measured, but this
Jiayin Dong, Daniel Foreman-Mackey
doaj   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen   +23 more
wiley   +1 more source

RNA metabolism in neurodegenerative disease

open access: yesDisease Models & Mechanisms, 2017
Aging-related neurodegenerative diseases are progressive and fatal neurological diseases that are characterized by irreversible neuron loss and gliosis.
Elaine Y. Liu   +2 more
doaj   +1 more source

Home - About - Disclaimer - Privacy