The polarimetric nature of HD 108
نویسندگان
چکیده
منابع مشابه
What is the real nature of HD 108 ? ⋆
Since the beginning of the past century, the nature of HD 108 has been a subject of intense debate. One after another, astronomers explored its variability and attributed it either to binarity, or to changes in the stellar wind of a single star. In this article, we analyse a 30 years long campaign of spectroscopic observations of this star with special emphasis on the last 15 years during which...
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We present new medium-resolution spectropolarimetric observations of HD 45677 in the B and R-bands. A change in polarisation is detected across Hα, Hβ and Hγ confirming that the ionised region around the star is aspherical. (Q,U) points associated with these emission lines occur away from the continuum, defining a polarisation vector which points in the same direction for each of the lines at a...
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Context. Oscillations on the Procyon-like star HD 49933 (F5V) were obtained recently by CoRoT. A full reduction and analysis of the data by the CoRoT team yielded a detailed spectrum of l = 0, 1, and 2 p-modes. Aims. To provide our own independent reductions and stellar modeling of the CoRoT oscillation data for HD 49933. Methods. We used a new Bayesian Markov Chain Monte Carlo method to fit Lo...
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The problem is addressed of how much hot star polarisation variability can result from density redistribution processes within the wind as opposed to localised enhancement of stellar mass loss rate, such as ejections of wind inhomogeneities. For optically thin electron scattering, we present a theory for the relative polarisation arising from particle redistribution and consider several specifi...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1998
ISSN: 0035-8711,1365-2966
DOI: 10.1046/j.1365-8711.1998.01296.x