Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Fluri, D. M."'
The solar surface magnetic field is connected with and even controls most of the solar activity phenomena. Zeeman effect diagnostics allow for measuring only a small fraction of the fractal-like structured magnetic field. The remaining hidden magneti
Externí odkaz:
http://arxiv.org/abs/1103.2524
We report first multicolor polarimetric measurements (UBV bands) for the hot Jupiters HD189733b and confirm our previously reported detection of polarization in the B band (Berdyugina et al. 2008). The wavelength dependence of polarization indicates
Externí odkaz:
http://arxiv.org/abs/1101.0059
Sunspots are prominent manifestations of the solar cycle and provide key constraints for understanding its operation. Also, knowing internal structure of sunspots allows us to gain insights on the energy transport in strong magnetic fields and, thus,
Externí odkaz:
http://arxiv.org/abs/1003.5114
Autor:
Fluri, D. M., Berdyugina, S. V.
Polarimetry of extrasolar planets becomes a new tool for their investigation, which requires the development of diagnostic techniques and parameter case studies. Our goal is to develop a theoretical model which can be applied to interpret polarimetri
Externí odkaz:
http://arxiv.org/abs/1001.3091
We report the first direct detection of an exoplanet in the visible polarized light. The transiting planet HD189733b is one of the very hot Jupiters with shortest periods and, thus, smallest orbits, which makes them ideal candidates for polarimetric
Externí odkaz:
http://arxiv.org/abs/0712.0193
Weak entangled magnetic fields with mixed polarity occupy the main part of the quiet Sun. The Zeeman effect diagnostics fails to measure such fields because of cancellation in circular polarization. However, the Hanle effect diagnostics, accessible t
Externí odkaz:
http://arxiv.org/abs/0709.2515
Recent spectropolarimetric observations of Herbig AeBe stellar systems show linear polarization variability with wavelength and epoch near their obscured H-alpha emission. Surprisingly, this polarization is not coincident with the H-alpha emission pe
Externí odkaz:
http://arxiv.org/abs/0708.0599
Lines of diatomic molecules are more temperature and pressure sensitive than atomic lines, which makes them ideal tools for studying cool stellar atmospheres an internal structure of sunspots and starspots. The FeH F^4 Delta-X^4 Delta system represen
Externí odkaz:
http://arxiv.org/abs/0708.0298
Publikováno v:
2006, in Solar Polarization Workshop 4, eds. R. Casini and B. Lites, ASP Conf. Ser., vol. 358, p. 381-384
We report on the first ever detection of circular polarization in molecular lines forming in magnetic regions on the surfaces of active stars. The new observations were obtained with the high-resolution spectropolarimeter ESPaDOnS recently installed
Externí odkaz:
http://arxiv.org/abs/astro-ph/0703560
Autor:
Berdyugina, S. V., Fluri, D. M., Afram, N., Suwald, F., Petit, P., Arnaud, J., Harrington, D. M., Kuhn, J. R.
Here we report on the first detection of circular polarization in molecular lines formed in cool magnetic regions (starspots) and in chromospheric emission lines formed in hot plages on the surfaces of active stars. Our survey of G-K-M stars included
Externí odkaz:
http://arxiv.org/abs/astro-ph/0703559