Alpha Virginis: line-profile variations and orbital elements
نویسندگان
چکیده
منابع مشابه
Line-profile Variability from Tidal Flows in Alpha Virginis (spica)
We present the results of high precision, high resolution (R∼68000) optical observations of the short-period (4d) eccentric binary system Alpha Virginis (Spica) showing the photospheric line-profile variability that in this system can be attributed to non-radial pulsations driven by tidal effects. Although scant in orbital phase coverage, the data provide S/N>2000 line profiles at full spectral...
متن کاملSpatial wavelet analysis of line-profile variations
AB S TRACT The technique of wavelet analysis is discussed in the context of line-profile variations in rapidly rotating stars undergoing non-radial pulsation. This technique may be used to determine the harmonic degree l of the pulsation using isolated residual spectra; it is able to handle spectra with relatively low signal-to-noise ratio levels, and is well suited to extracting previously uno...
متن کاملLine profile variations in γ Doradus
We present data from high-dispersion echelle spectra and simultaneous uvby photometry for γ Doradus. These data were obtained from several sites during 1994 November as part of the MUSICOS-94 campaign. The star has two closely-spaced periods of about 0.75 d and is the brightest member of a new class of variable early F-type stars. A previously suspected third period, very close to the other two...
متن کاملMode identification from line-profile variations
We review the current status of different mode-identification techniques based on observed line-profile variations. Three basic methods are currently available to identify the non-radial pulsation modes. These three methods are described, together with their different variants. We further present applications to real data, focusing especially on δ Scuti stars. After having discussed all the met...
متن کاملBalmer emission - line profile variations in NGC 4593
We present results of a variability campaign of Balmer line profiles inNGC 4593. The continuumand the broad emission line intensities varied up to 50 per cent during the observing period. The rms profiles of the Balmer lines as well as the difference line profiles can be described by a limited number of strong components only: a central component and two to four outer components which are locat...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2016
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201526507