131 Tau: another Formula Bootis star with a shell
نویسندگان
چکیده
منابع مشابه
The λ Bootis phenomenon: interaction between a star and a diffuse interstellar cloud
The λ Bootis stars, a group of late B to early F-type population I stars, have surface abundances that resemble the general metal depletion pattern found in the interstellar medium. Inspired by the recent result that the fundamental parameters of these peculiar stars differ in no respect from a comparison sample of normal stars, the hypothesis of an interaction between a star and a diffuse inte...
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متن کاملMagnetic cycles of the planet-hosting star τ Bootis: II. a second magnetic polarity reversal
In this paper, we present new spectropolarimetric observations of the planethosting star τ Bootis, using ESPaDOnS and Narval spectropolarimeters at CanadaFrance-Hawaii Telescope (CFHT) and Telescope Bernard Lyot (TBL), respectively. We detected the magnetic field of the star at three epochs in 2008. It is a weak magnetic field of only a few Gauss, oscillating between a predominant toroidal comp...
متن کاملAn Upper Limit on the Reflected Light from the Planet Orbiting the Star Τ Bootis
The planet orbiting τ Boo at a separation of 0.046 AU could produce a reflected light flux as bright as 1× 10 relative to that of the star. A spectrum of the system will contain a reflected light component which varies in amplitude and Doppler-shift as the planet orbits the star. Assuming the secondary spectrum is primarily the reflected stellar spectrum, we can limit the relative reflected lig...
متن کاملA Search for Variability in the Spectral Line Shapes of τ Bootis : Does this Star Really Have a Planet ?
An analysis is made of the spectral line shapes of τ Bootis using high resolution (0.026 Å) and high signal-to-noise (S/N ≈ 400) data in an effort to confirm the planet hypothesis for this star. Changes in the line shape are quantified using spectral line bisectors and line residuals. We detect no variations in either of these quantities above the level of the noise in the data. One spectral li...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1994
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/266.4.891