Zobrazeno 1 - 10
of 10 270
pro vyhledávání: '"A Mengel M"'
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:
Heitzmann, A., Marsden, S. C., Petit, P., Mengel, M. W., Wright, D., Clerte, M., Millburn, I., Folsom, C. P., Addison, B. C., Wittenmyer, R. A., Waite, I. A.
Short-orbit gas giant planet formation/evolution mechanisms are still not well understood. One promising pathway to discriminate between mechanisms is to constrain the occurrence rate of these peculiar exoplanets at the earliest stage of the system's
Externí odkaz:
http://arxiv.org/abs/2105.13537
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
The orbital solutions of published multi-planet systems are not necessarily dynamically stable on timescales comparable to the lifetime of the system as a whole. For this reason, dynamical tests of the architectures of proposed exoplanetary systems a
Externí odkaz:
http://arxiv.org/abs/2011.13197
Autor:
Marshall, J. P., Wittenmyer, R. A., Horner, J., Clark, J., Mengel, M. W., Hinse, T. C., Agnew, M. T., Kane, S. R.
Multi-planet systems around evolved stars are of interest to trace the evolution of planetary systems into the post-main sequence phase. HD 47366, an evolved intermediate mass star, hosts two giant planets on moderately eccentric orbits. Previous ana
Externí odkaz:
http://arxiv.org/abs/1811.06476
Autor:
Nicholson, B. A., Hussain, G. A. J., Donati, J. -F., Folsom, C. P., Mengel, M., Carter, B. D., Wright, D., collaboration, the MaTYSSE
We present a detailed analysis of high-resolution spectropolarimetric observations of the weak-line T Tauri stars (wTTSs) TWA 9A and V1095 Sco as part of a wider sur- vey of magnetic properties and activity in weak-line T Tauri stars, called MaTYSSE
Externí odkaz:
http://arxiv.org/abs/1807.07684
Autor:
Jeffers, S. V., Mengel, M., Moutou, C., Marsden, S. C., Barnes, J. R., Jardine, M. M., Petit, P., Schmitt, J. H. M. M., See, V., Vidotto, A. A.
One of the aims of the BCool programme is to search for cycles in other stars and to understand how similar they are to the Sun. In this paper we aim to monitor the evolution of $\tau$ Boo's large-scale magnetic field using high-cadence observations
Externí odkaz:
http://arxiv.org/abs/1805.09769
Autor:
Wittenmyer, Robert A., Horner, Jonathan, Mengel, M. W., Butler, R. P., Wright, D. J., Tinney, C. G., Carter, B. D., Jones, H. R. A., Anglada-Escude, G., Bailey, J., O'Toole, Simon J.
We report the discovery of a second long-period giant planet orbiting HD 30177, a star previously known to host a massive Jupiter analog (HD 30177b: a=3.8$\pm$0.1 au, m sin $i=9.7\pm$0.5 Mjup). HD 30177c can be regarded as a massive Saturn analog in
Externí odkaz:
http://arxiv.org/abs/1612.02072
Autor:
Mengel, M. W., Marsden, S. C., Carter, B. D., Horner, J., King, R., Fares, R., Jeffers, S. V., Petit, P., Vidotto, A. A., Morin, J., Collaboration, the BCool
We present a spectropolarimetric snapshot survey of solar-type planet hosting stars. In addition to 14 planet-hosting stars observed as part of the BCool magnetic snapshot survey, we obtained magnetic observations of a further 19 planet-hosting solar
Externí odkaz:
http://arxiv.org/abs/1611.07604
Autor:
Mengel, M. W., Fares, R., Marsden, S. C., Carter, B. D., Jeffers, S. V., Petit, P., Donati, J. -F., Folsom, C. P., Collaboration, the BCool
We present six epochs of spectropolarimetric observations of the hot-Jupiter-hosting star $\tau$ Bo\"otis that extend the exceptional previous multi-year data set of its large-scale magnetic field. Our results confirm that the large-scale magnetic fi
Externí odkaz:
http://arxiv.org/abs/1604.02501