Search results for "NW Serpentis"

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Multiperiodic pulsations in the Be stars NW Serpentis and V1446 Aquilae

2007

Aims.We present accurate photometric time series of two Be stars: NW Ser and V1446 Aql . Both stars were observed at the Observatorio de Sierra Nevada (Granada) in July 2003 with an automatic four-channel Strömgren photometer. We also present a preliminary theoretical study showing that the periodic variations exhibited by these stars can be due to pulsation. Methods.An exhaustive Fourier analysis together with a least-square fitting has been carried out on the time series for all four Strömgren bands. Several independent frequencies and non-periodic trends explain most of the variance. A theoretical non-adiabatic code applied to stellar models for these stars shows that g-modes are unstabl…

OscillationsIndividualAstrophysicsUNESCO::ASTRONOMÍA Y ASTROFÍSICAStability (probability)law.inventionsymbols.namesakelawAstrophysics::Solar and Stellar AstrophysicsEmission spectrumAstrophysics::Galaxy AstrophysicsNW SerpentisPhysicsBeAstronomy and AstrophysicsPhotometerStars:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO]StarsAmplitudeSpace and Planetary ScienceFourier analysissymbolsStars ; Oscillations ; Emission-line ; Be ; Individual ; NW Serpentis ; V1446 AquilaeAstrophysics::Earth and Planetary AstrophysicsUNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogoniaV1446 Aquilae[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]Emission-line:ASTRONOMÍA Y ASTROFÍSICA [UNESCO]
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