The 6.7 keV thermal emission lines in the stellar flare spectra of two chromospherically active Binaries: Algol and GT Mus

Autor: Ambrose Chukwudi Eze, Chikwem Obinna Goodwill, Sudum Esaenwi, Fidelis Okey Madu

Publikováno v: Advances in Space Research. 69:499-513

Chromospherically active binaries’ (CABs) are late-type evolved stars with strong chromosphere/coronae and high flare activity levels. Starspot evolution in these CABs and binaries reveals strong stellar and chromospheric activities. In binaries, t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::62353d31b7cf6b94fbc654f8e1a23a31
https://doi.org/10.1016/j.asr.2021.09.037

Evolution of brightness and magnetic features of young solar-type stars – I. The young G star HIP 89829

Autor: J. E. Hughes, Stephen C. Marsden, Matthew W. Mengel, D. Burton, Nikolai Piskunov, S. V. Jeffers, Ian A. Waite, N. Shaw, G. M. Perugini, E. Hébrard

Publikováno v: Monthly Notices of the Royal Astronomical Society. 508:3304-3320

The evolution in latitude of sunspots is a key feature of the cyclic solar dynamo. Here, we present the results of a spectroscopic and spectropolarimetric monitoring campaign on the young (∼20 Myr old) early G star HIP 89829, in order to investigat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::80942887f2d857e51e4aa1d1c62dad92
https://doi.org/10.1093/mnras/stab2711

Determining fundamental parameters of detached double-lined eclipsing binary systems via a statistically robust machine learning method

Autor: Achim Weiss, Bryce A Remple, George C. Angelou

Publikováno v: Monthly Notices of the Royal Astronomical Society. 507:1795-1813

The parameter space for modelling stellar systems is vast and complicated. To find best-fitting models for a star one needs a statistically robust way of exploring this space. We present a new machine-learning approach to predict the modelling parame

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::27ceb11090c50d1ab2f239db74ced3bf
https://doi.org/10.1093/mnras/stab2030

Stellar flares detected with the Next Generation Transit Survey

Autor: James A. G. Jackman, Jack S. Acton, Michael R. Goad, Rosanna H. Tilbrook, Didier Queloz, Edward Gillen, Sarah L. Casewell, Boris T. Gänsicke, Samuel Gill, Simon Hodgkin, Maximilian N. Günther, David R. Anderson, Richard G. West, Liam Raynard, Beth A. Henderson, Joshua T. Briegal, Chloe E. Pugh, Daniel Bayliss, Matthew R. Burleigh, James S. Jenkins, Peter J. Wheatley, Christopher A. Watson

Publikováno v: Jackman, J A G, Wheatley, P J, Acton, J S, Anderson, D R, Bayliss, D, Briegal, J T, Burleigh, M R, Casewell, S L, Gänsicke, B T, Gill, S, Gillen, E, Goad, M R, Günther, M N, Henderson, B A, Hodgkin, S T, Jenkins, J S, Pugh, C, Queloz, D, Raynard, L, Tilbrook, R H, Watson, C A & West, R G 2021, ' Stellar flares detected with the Next Generation Transit Survey ', Monthly Notices of the Royal Astronomical Society, vol. 504, no. 3, pp. 3246-3264 . https://doi.org/10.1093/mnras/stab979

We present the results of a search for stellar flares in the first data release from the Next Generation Transit Survey (NGTS). We have found 610 flares from 339 stars, with spectral types between F8 and M6, the majority of which belong to the Galact

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::98407398c515ba3226e3b80ea371e165
https://doi.org/10.1093/mnras/stab979

Correcting the effect of stellar spots on ARIEL transmission spectra

Autor: Giuseppina Micela, Giovanni Peres, Gianluca Cracchiolo

Publikováno v: Monthly Notices of the Royal Astronomical Society. 501:1733-1747

The goal of this study is to assess the impact of the stellar spots on the extraction of the planetary transmission spectra observed by ARIEL. We develop a method to model the stellar spectrum of a star in the presence of spots by using the out-of-tr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d829206419ad5edb1e3582584f43159
https://doi.org/10.1093/mnras/staa3621