Zobrazeno 1 - 10
of 1 219
pro vyhledávání: '"Jardine, M."'
We present a multiwavelength study of AB Doradus, combining modelling that incorporates a spectropolarimetric magnetic field map with 8.4 GHz radio interferometry to measure the coronal extent and density of this young star. We use the surface magnet
Externí odkaz:
http://arxiv.org/abs/2404.06304
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:
Strugarek, A., Fares, R., Bourrier, V., Brun, A. S., Réville, V., Amari, T., Helling, Ch., Jardine, M., Llama, J., Moutou, C., Vidotto, A. A., Wheatley, P. J., Zarka, P.
Magnetic interactions between stars and close-in planets may lead to a detectable signal on the stellar disk. HD 189733 is one of the key exosystems thought to harbor magnetic interactions, which may have been detected in August 2013. We present a se
Externí odkaz:
http://arxiv.org/abs/2203.10956
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
Publikováno v:
2021MNRAS.tmp..352L
The helicity of a magnetic field is a fundamental property that is conserved in ideal MHD. It can be explored in the stellar context by mapping large-scale magnetic fields across stellar surfaces using Zeeman-Doppler imaging. A recent study of 51 sta
Externí odkaz:
http://arxiv.org/abs/2102.11238
Autor:
Brown, E. L., Marsden, S. C., Mengel, M. W., Jeffers, S. V., Millburn, I., Mittag, M., Petit, P., Vidotto, A. A., Morin, J., See, V., Jardine, M., González-Pérez, J. N., Collaboration, the BCool
Studying cool star magnetic activity gives an important insight into the stellar dynamo and its relationship with stellar properties, as well as allowing us to place the Sun's magnetism in the context of other stars. Only 61 Cyg A (K5V) and $\tau$ Bo
Externí odkaz:
http://arxiv.org/abs/2012.05407
Autor:
Stauffer, J. R., Rebull, L. M., Jardine, M., Cameron, A. Collier, Cody, A. M., Hillenbrand, L. A., Barrado, D., Kruse, E., Powell, B. P.
Using K2, we recently discovered a new type of periodic photometric variability while analysing the light curves of members of Upper Sco (Stauffer \etal\ 2017). The 23 exemplars of this new variability type are all mid-M dwarfs, with short rotation p
Externí odkaz:
http://arxiv.org/abs/2011.01839
Autor:
Cang, T. -Q., Petit, P., Donati, J. -F., Folsom, C. P., Jardine, M., D'Angelo, C. Villarreal, Vidotto, A. A., Marsden, S. C., Gallet, F., Zaire, B.
Publikováno v:
A&A 643, A39 (2020)
We investigate signatures of magnetic fields and activity at the surface and in the prominence system of the ultra-rapid rotator V530 Per, a G-type solar-like member of the young open cluster $\alpha$~Persei. This object has a rotation period shorter
Externí odkaz:
http://arxiv.org/abs/2008.12120
Autor:
Lund, K., Jardine, M., Lehmann, L. T., Mackay, D. H., See, V., Vidotto, A. A., Donati, J. -F., Fares, R., Folsom, C. P., Jeffers, S. V., Marsden, S. C., Morin, J., Petit, P.
Helicity is a fundamental property of a magnetic field but to date it has only been possible to observe its evolution in one star - the Sun. In this paper we provide a simple technique for mapping the large-scale helicity density across the surface o
Externí odkaz:
http://arxiv.org/abs/2001.11749
Autor:
Bourrier, V., Wheatley, P. J., Etangs, A. Lecavelier des, King, G., Louden, T., Ehrenreich, D., Fares, R., Helling, Ch., Llama, J., Jardine, M. M., Vidotto, A. A.
In this third paper of the MOVES (Multiwavelength Observations of an eVaporating Exoplanet and its Star) programme, we combine Hubble Space Telescope far-ultraviolet observations with XMM-Newton/Swift X-ray observations to measure the emission of HD
Externí odkaz:
http://arxiv.org/abs/2001.11048