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Mostrando ítems 21-30 de 56
Semi-empirical Modeling of the Photosphere, Chromosphere, Transition Region, and Corona of the M-dwarf Host Star GJ 832
(IOP Publishing, 2016-10)
Stellar radiation from X-rays to the visible provides the energy thatcontrols the photochemistry and mass loss from exoplanet atmospheres.The important extreme ultraviolet (EUV) region (10-91.2 nm) isinaccessible and should ...
A long-period planet orbiting a nearby Sun-like star
(2010)
The Doppler wobble induced by the extra-solar planet HD 134987b was first detected by data from the Keck Telescope nearly a decade ago, and was subsequently confirmed by data from the Anglo-Australian Telescope (AAT). ...
α Centauri A in the far infrared*: First measurement of the temperature minimum of a star other than the Sun
(Astronomy & Astrophysics, 2013)
Solar slow magneto-acoustic-gravity waves: an erratum correction and a revisited scenario
(Oxford University Press, 2020-04)
Slow waves are commonly observed on the entire solar atmosphere. Assuming a thin flux tube approximation, the cut-off periods of slow-mode magneto-acoustic-gravity waves that travel from the photosphere to the corona were ...
On the evolutionary status of Be stars, I: field Be stars near the sun
(EDP Sciences, 2005-10)
A sample of 97 galactic field Be stars were studied by taking into account the effects induced by the fast rotation on their fundamental parameters. All program stars were observed in the BCD spectrophotometric system in ...
Chemical abundance analysis of the Be star HD 171054
(ELSEVIER SCIENCE BV, 2011)
In this work the results of a spectroscopic study of the southern field narrow-line Be star HD 171054 are presented. High dispersion and signal-to-noise ratio spectra allowed the estimation of the fundamental photospheric ...
Estudio observacional de la dinámica de puntos brillantes en una zona del sol en calma
(Universidad Nacional de ColombiaBogotá - Ciencias - Maestría en Ciencias - AstronomíaObservatorio Astronómico NacionalFacultad de CienciasBogotá, ColombiaUniversidad Nacional de Colombia - Sede Bogotá, 2021)
Las observaciones en alta resolución de la fotosfera solar han revelado la existencia de estructuras compuestas de diminutos Puntos Magnéticos Brillantes o MBPs (por sus siglas en inglés). Tales estructuras a pequeña escala ...
A long-period planet orbiting a nearby Sun-like star
(2010)
The Doppler wobble induced by the extra-solar planet HD 134987b was first detected by data
from the Keck Telescope nearly a decade ago, and was subsequently confirmed by data from
the Anglo-Australian Telescope (AAT). ...
The influence of planetary attractions on the solar tachocline
(Elsevier, 2012-05)
We present a physical analysis of the occasionally forwarded hypothesis that solar variability, as shown in the various photospheric and outer solar layer activities, might be due to the Newtonian attraction by the planets. ...