The supposed variable star Y Aquilae

The fundamental parameters of the roAp star 10 Aquilae⋆

Context. Owing to the strong magnetic field and related abnormal surface layers existing in rapidly oscillating Ap (roAp) stars, systematic errors are likely to be present when determining their effective temperatures, which potentially compromises asteroseismic studies of this class of pulsators. Aims. Using the unique angular resolution provided by long-baseline visible interferometry, our go...

Magnetic field variations with pulsational phase in the classical Cepheid star η Aquilae

The presence of the magnetic field on the classical Cepheid η Aquilae is established. The magnetic field shows periodic variations with a reversal of its polarity due to stellar pulsations (−100 < Be < +50 G). Two closed values of Be lie out of the magnetic curve at phases φ = 0.610 and φ = 0.629. It was suggested that these recoiled points show that the abrupt change of the magnetic field occu...

Luminous Red Variable Star

We report photometry and spectroscopy of the evolution of Nova Sagittarii 1994 #1 (V4332 Sagittarii) during outburst. We compare the photometric and spectral evolution of this outburst to known classes of outbursts – including classical novae and outbursts occurring on symbiotic stars – and find this object does not conform to any known class of outburst. The closest match to the behavior of th...

Relationship between Training-Induced Changes in the Star Excursion Balance Test and the Y Balance Test in Young Male Athletes

Background. Dynamic balance is often assessed in athletes using either the Star Excursion Balance Test (SEBT) or the Y Balance Test (YBT). There is evidence that the results for the three common directions are not comparable. Thus, the question is open to debate as to which instrument is better suited to measure training-induced changes over time. Objectives. The aim of this study is to compar...

The sixth frequen y of roAp star HR 1217 Margarida