Zobrazeno 1 - 10
of 375
pro vyhledávání: '"Doyle, J. G."'
Autor:
Rigney, J., Gallagher, P. T., Ramsay, G., Doyle, J. G., Long, D. M., Stepanyuk, O., Kozarev, K.
Publikováno v:
A&A 684, L7 (2024)
Shock waves are excited by coronal mass ejections (CMEs) and large-scale extreme-ultraviolet (EUV) wave fronts and can result in low-frequency radio emission under certain coronal conditions. In this work, we investigate a moving source of low-freque
Externí odkaz:
http://arxiv.org/abs/2403.17659
We investigate high resolution spectroscopic and imaging observations from the CRisp Imaging SpectroPolarimeter (CRISP) instrument to study the dynamics of chromospheric spicule type events. It is widely accepted that chromospheric fine structures ar
Externí odkaz:
http://arxiv.org/abs/2112.14486
Autor:
Nived, V. N., Scullion, E., Doyle, J. G., Susino, R., Antolin, P., Spadaro, D., Sasso, C., Sahin, S., Mathioudakis, M.
We report on the properties of coronal loop foot-point heating with observations at the highest resolution, from the CRisp Imaging Spectro-Polarimeter (CRISP) located at the Swedish 1-m Solar Telescope (SST) and co-aligned NASA Solar Dynamics Observa
Externí odkaz:
http://arxiv.org/abs/2111.07967
Autor:
Murphy, P. C., Callanan, P., McCauley, J., McKenna, D. J., Fionnagáin, D. Ó, Louis, C. K., Redman, M. P., Cañizares, L. A., Carley, E. P., Maloney, S. A., Coghlan, B., Daly, M., Scully, J., Dooley, J., Gajjar, V., Giese, C., Brennan, A., Keane, E. F., Maguire, C. A., Quinn, J., Mooney, S., Ryan, A. M., Walsh, J., Jackman, C. M., Golden, A., Ray, T. P., Doyle, J. G., Rigney, J., Burton, M., Gallagher, P. T.
Publikováno v:
A&A 655, A16 (2021)
Modern radio interferometers such as the LOw Frequency ARray (LOFAR) are capable of producing data at hundreds of gigabits to terabits per second. This high data rate makes the analysis of radio data cumbersome and computationally expensive. While hi
Externí odkaz:
http://arxiv.org/abs/2108.11251
In our previous study of low mass stars using TESS, we found a handful which show a periodic modulation on a period <1 d but also displayed no flaring activity. Here we present the results of a systematic search for Ultra Fast Rotators (UFRs) in the
Externí odkaz:
http://arxiv.org/abs/2007.04071
The resonance lines of \ion{Si}{4} formed at $\lambda$1394 and 1403 {\AA} are the most critical for the diagnostics of the solar transition region in the observations of the Interface Region Imaging Spectrograph (IRIS). Studying the intensity ratios
Externí odkaz:
http://arxiv.org/abs/2004.04530
Autor:
Srivastava, A. K., Rao, Yamini K., Konkol, P., Murawski, K., Mathioudakis, M., Tiwari, Sanjiv K., Scullion, E., Doyle, J. G., Dwivedi, B. N.
We observe plasma flows in cool loops using the Slit-Jaw Imager (SJI) onboard the Interface Region Imaging Spectrometer (IRIS). Huang et al. (2015) observed unusually broadened Si IV 1403 angstrom line profiles at the footpoints of such loops that we
Externí odkaz:
http://arxiv.org/abs/2004.02775
Detailed studies of the Sun have shown that sunspots and solar flares are closely correlated. Photometric data from Kepler/K2 has allowed similar studies to be carried out on other stars. Here, we utilise TESS photometric 2-min cadence of 167 low mas
Externí odkaz:
http://arxiv.org/abs/1908.02698
Autor:
Houdebine, Eric R., Mullan, D. J., Doyle, J. G., de La Vieuville, Geoffroy, Butler, C. J., Paletou, F.
Empirical correlations between stellar parameters such as rotation or radius and magnetic activity diagnostics require estimates of the effective temperatures and the stellar radii. The aim of this study is to propose simple methods that can be appli
Externí odkaz:
http://arxiv.org/abs/1905.07921
Autor:
Srivastava, A. K., Mishra, Sudheer K., Jelínek, P., Samanta, Tanmoy, Tian, Hui, Pant, Vaibhav, Kayshap, P., Banerjee, D., Doyle, J. G., Dwivedi, B. N.
Using multiwavelength imaging observations from the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO) on 03 May 2012, we present a novel physical scenario for the formation of a temporary X-point in the solar corona, whe
Externí odkaz:
http://arxiv.org/abs/1901.07971