New variable star 67.1907 bootis
نویسندگان
چکیده
منابع مشابه
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...
متن کاملThe 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...
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 کاملNew seismological results on the G 0 IV η Bootis ⋆
Several attempts have been made to detect solar-like oscillations in the G0 IV star η Boo. We present here new observations on this star simultaneously conducted with two spectrographs: Coralie mounted on the 1.2-m Swiss telescope at the ESO La Silla Observatory (Chile) and Elodie based on the 1.93-m telescope at the Observatoire de Haute Provence (France). In total, 1239 spectra were collected...
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...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 1907
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.19071751603