Zobrazeno 1 - 10
of 688
pro vyhledávání: '"Saikia S"'
Autor:
Bellotti, S., Evensberget, D., Vidotto, A. A., Lavail, A., Lueftinger, T., Hussain, G. A. J., Morin, J., Petit, P., Saikia, S. Boro, Danielski, C., Micela, G.
The accurate characterisation of the stellar magnetism of planetary host stars has been gaining momentum, especially in the context of transmission spectroscopy investigations of exoplanets. Indeed, the magnetic field regulates the amount of energeti
Externí odkaz:
http://arxiv.org/abs/2405.19052
Stellar winds of cool main sequence stars are very difficult to constrain observationally. One way to measure stellar mass loss rates is to detect soft X-ray emission from stellar astrospheres produced by charge exchange between heavy ions of the ste
Externí odkaz:
http://arxiv.org/abs/2404.14980
Autor:
Saikia, S. Boro, Lueftinger, T., Airapetian, V. S., Ayres, T., Bartel, M., Guedel, M., Jin, M., Kislyakova, K. G., Testa, P.
The magnetic processes associated with the non-thermal broadening of optically thin emission lines appear to carry enough energy to heat the corona and accelerate the solar wind. We investigate whether non-thermal motions in cool stars exhibit the sa
Externí odkaz:
http://arxiv.org/abs/2304.02667
Publikováno v:
A&A 671, A162 (2023)
Context: With the recent surge of planetary surveys focusing on detecting Earth-mass planets around M dwarfs, it is becoming more important to understand chromospheric activity in M dwarfs. Stellar chromospheric calcium emission is typically measured
Externí odkaz:
http://arxiv.org/abs/2302.00056
Autor:
Brown, E. L., Jeffers, S. V., Marsden, S. C., Morin, J., Saikia, S. Boro, Petit, P., Jardine, M. M., See, V., Vidotto, A. A., Mengel, M. W., Dahlkemper, M. N., Collaboration, the BCool
Spectropolarimetric data allow for simultaneous monitoring of stellar chromospheric $\log{R^{\prime}_{\rm{HK}}}$ activity and the surface-averaged longitudinal magnetic field, $B_l$, giving the opportunity to probe the relationship between large-scal
Externí odkaz:
http://arxiv.org/abs/2205.03108
Autor:
Jeffers, S. V., Cameron, R. H., Marsden, S. C., Saikia, S. Boro, Folsom, C. P., Jardine, M. M., Morin, J., Petit, P., See, V., Vidotto, A. A., Wolter, U., Mittag, M.
Cool main-sequence stars, such as the Sun, have magnetic fields which are generated by an internal dynamo mechanism. In the Sun, the dynamo mechanism produces a balance between the amounts of magnetic flux generated and lost over the Sun's 11-year ac
Externí odkaz:
http://arxiv.org/abs/2201.07530
Autor:
Saikia, S. Boro, Lueftinger, T., Folsom, C. P., Antonova, A., Alecian, E., Donati, J. -F., Guedel, M., Hall, J. C., Jeffers, S. V., Kochukhov, O., Marsden, S. C., Metodieva, Y. T., Mittag, M., Morin, J., Perdelwitz, V., Petit, P., Schmid, M., Vidotto, A. A.
A detailed investigation of the magnetic properties of young Sun-like stars can provide valuable information on our Sun's magnetic past and its impact on the early Earth. We determine the properties of the moderately rotating young Sun-like star kapp
Externí odkaz:
http://arxiv.org/abs/2110.06000
Autor:
Saikia, S. Boro, Jin, M., Johnstone, C. P., Lüftinger, T., Güdel, M., Airapetian, V. S., Kislyakova, K. G., Folsom, C. P.
Alfv\'en-wave-driven 3D magnetohydrodynamic (MHD) models, which are increasingly used to predict stellar wind properties, contain unconstrained parameters and rely on low-resolution stellar magnetograms. We explore the effects of the input Alfv\'en w
Externí odkaz:
http://arxiv.org/abs/2002.10460
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Akademický článek
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