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Mostrando ítems 11-20 de 20
A ~ 40 year variability cycle in the luminous blue variable/Wolf-Rayet Binary System HD 5980?
(Iop Publishing, 2010-06)
The massive Wolf-Rayet stellar system HD 5980 in the Small Magellanic Cloud entered a sudden and brief ~ 1-3 mag eruptive state in the mid-1990s. The cause of the instability is not yet understood, but mechanisms similar ...
Astrosismología de estrellas variables Delta Scuti y Gamma Doradus
(Asociación Argentina de Astronomía, 2014-09)
En este trabajo presentamos resultados preliminares de la etapa inicial de un proyecto de gran magnitud consistente en el modelado teórico de estrellas variables Delta Sct y Gamma Dor. En esta primer etapa realizamos ...
The first view of δ Scuti and γ Doradus stars with the TESS mission
(Oxford University Press, 2019-12)
We present the first asteroseismic results for δ Scuti and γ Doradus stars observed in Sectors 1 and 2 of the TESS mission. We utilize the 2-min cadence TESS data for a sample of 117 stars to classify their behaviour ...
Luminous blue variables: An imaging perspective on their binarity and near environment
(ESO, 2016-03)
Context. Luminous blue variables (LBVs) are rare massive stars with very high luminosity. They are characterized by strong photometric and spectroscopic variability related to transient eruptions. The mechanisms at the ...
Eta Carinae's 2014.6 spectroscopic event: Clues to the long-term recovery from its Great Eruption
(ESO, 2015)
Aims. Every 5.5 years, eta Car's light curve and spectrum change remarkably across all observed wavelength bands. These so-called spectroscopic events are most likely caused by the close approach of a companion. We compare ...
Wind structure and luminosity variations in the Wolf-Rayet/Luminous Blue Variable HD 5980
(Iop Publishing, 2011-12)
Over the past 40 years, the massive luminous blue variable/Wolf-Rayet system HD 5980 in the Small Magellanic Cloud (SMC) has undergone a long-term S Doradus-type variability cycle and two brief and violent eruptions in ...
Análise wavelet em curvas de luz de binárias eclipsantes da missão Kepler
(Universidade Federal do Rio Grande do NorteBrasilUFRNFísica Bacharelado, 2019)
The VLT-FLAMES Tarantula Survey. II. R139 revealed as a massive binary system
(Edp Sciences, 2011-06)
We report the discovery that R139 in 30 Doradus is a massive spectroscopic binary system. Multi-epoch optical spectroscopy of R139 was obtained as part of the VLT-FLAMES Tarantula Survey, revealing a double-lined system. ...
The VMC ESO Public Survey
(European Southern Observatory, 2013-12)
The VISTA near-infrared YJKs survey of the Magellanic Clouds system (VMC) has entered its core phase: about 50% of the observations across the Large and Small Magellanic Clouds (LMC, SMC), the Magellanic Bridge and Stream ...