منابع مشابه
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...
متن کاملModeling Eclipses of the Novalike Variable TT Triangulum
Multicolor (BV RI) light curves of the eclipsing novalike variable TT Tri are presented. The eclipse profiles are analyzed with a parameter-fitting model that assumes four sources of luminosity: a white dwarf primary star, a mainsequence secondary star, a flared accretion disk with a rim, and a bright spot at the intersection of the mass-transfer stream and the disk periphery. Model parameters ...
متن کاملMagnetic 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...
متن کاملOn the pulsation parallax of the variable star RR Lyr
We show that a straightforward application of the predicted relation connecting the absolute K magnitude of fundamental RR Lyrae variables to their period and metal content, together with current evolutionary predictions on the mass and luminos-ity of Horizontal Branch stars, supply a distance estimate to the prototype star RR Lyr in close agreement with the recent parallax determination by HST...
متن کاملLuminous 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...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 1911
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.19111871303