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Detailed cool star ...
Detailed cool star flare morphology with CHEOPS and TESS
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- Bruno, G. (author)
- Istituto nazionale di astrofisica (INAF)
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- Pagano, I. (author)
- Istituto nazionale di astrofisica (INAF)
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- Scandariato, Gaetano (author)
- Istituto nazionale di astrofisica (INAF)
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show more...
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- Florén, H.-G. (author)
- Stockholms universitet,Stockholm University
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- Brandeker, A. (author)
- Stockholms universitet,Stockholm University
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- Olofsson, G. (author)
- Stockholms universitet,Stockholm University
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- Maxted, P. (author)
- Keele University
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- Fortier, A. (author)
- Universität Bern,University of Bern
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- Sousa, S.G. (author)
- Universidade do Porto,University of Porto
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- Sulis, S. (author)
- Laboratoire d'Astrophysique de Marseille
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- Van Grootel, V. (author)
- Universite de Liège,University of Liège
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- Garai, Z. (author)
- Slovak Academy of Sciences,Eötvös Loránd University (ELTE)
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- Boldog, (author)
- Magyar Tudomanyos Akademia,Hungarian Academy of Sciences,Eötvös Loránd University (ELTE)
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- Kriskovics, L. (author)
- Magyar Tudomanyos Akademia,Hungarian Academy of Sciences
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- Szabó, Gy M. (author)
- Eötvös Loránd University (ELTE)
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- Gandolfi, D. (author)
- Universita degli Studi di Torino,University of Turin
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- Alibert, Y. (author)
- Universität Bern,University of Bern
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- Alonso, R. (author)
- Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
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Bárczy, T. (author)
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- Barrado Navascues, D. (author)
- European Space Astronomy Centre (ESAC)
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- Barros, S.C.C. (author)
- Universidade do Porto,University of Porto
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Baumjohann, W. (author)
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- Beck, M. (author)
- Université de Genève,University of Geneva
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- Beck, T. (author)
- Universität Bern,University of Bern
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- Benz, W. (author)
- Universität Bern,University of Bern
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- Billot, N. (author)
- Université de Genève,University of Geneva
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- Borsato, L. (author)
- Istituto nazionale di astrofisica (INAF)
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- Broeg, C. (author)
- Universität Bern,University of Bern
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- Collier Cameron, A. (author)
- University of St Andrews
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- Csizmadia, Szilard (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Cubillos, P. E. (author)
- Istituto nazionale di astrofisica (INAF)
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- Davies, M. B. (author)
- Lunds universitet,Lund University
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- Deleuil, M. (author)
- Laboratoire d'Astrophysique de Marseille
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- Deline, A. (author)
- Université de Genève,University of Geneva
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- Delrez, L. (author)
- Katholieke Universiteit Leuven,Universite de Liège,University of Liège
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- Demangeon, O. (author)
- Universidade do Porto,University of Porto
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- Demory, B.O. (author)
- Universität Bern,University of Bern
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- Ehrenreich, D. (author)
- Université de Genève,University of Geneva
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- Erikson, Anders (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Farinato, J. (author)
- Istituto nazionale di astrofisica (INAF)
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Fossati, L. (author)
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- Fridlund, Malcolm, 1952 (author)
- Universiteit Leiden (UL),Leiden University (UL),Chalmers tekniska högskola,Chalmers University of Technology
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- Gillon, Michaël (author)
- Universite de Liège,University of Liège
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- Gudel, M. (author)
- Universität Wien,University of Vienna
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- Günther, Maximilian N. (author)
- European Space Research and Technology Centre (ESA ESTEC)
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- Heitzmann, A. (author)
- Université de Genève,University of Geneva
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- Helling, Ch. (author)
- Technische Universität Graz
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- Hoyer, S. (author)
- Laboratoire d'Astrophysique de Marseille
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- Isaak, K. (author)
- European Space Research and Technology Centre (ESA ESTEC)
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- Kiss, L. L. (author)
- Magyar Tudomanyos Akademia,Hungarian Academy of Sciences
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- Lam, K. W.F. (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Laskar, J. (author)
- Observatoire de Paris,Paris Observatory
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- des Etangs, A. L. (author)
- Institut d 'Astrophysique de Paris
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- Lendl, M. (author)
- Université de Genève,University of Geneva
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- Magrin, D. (author)
- Istituto nazionale di astrofisica (INAF)
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- Mordasini, C. (author)
- Universität Bern,University of Bern
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- Nascimbeni, Valerio (author)
- Istituto nazionale di astrofisica (INAF)
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- Ottensamer, R. (author)
- Universität Wien,University of Vienna
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- Palle, Enric (author)
- Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
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- Peter, G. (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Piotto, Giampaolo P. (author)
- Istituto nazionale di astrofisica (INAF),Università Degli Studi di Padova,University of Padua
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- Pollacco, Don L. (author)
- The University of Warwick
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- Queloz, D. (author)
- University Of Cambridge,Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH)
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- Ragazzoni, Roberto (author)
- Istituto nazionale di astrofisica (INAF),Università Degli Studi di Padova,University of Padua
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- Rando, N. (author)
- European Space Research and Technology Centre (ESA ESTEC)
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- Ratti, F. (author)
- European Space Research and Technology Centre (ESA ESTEC)
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- Rauer, H. (author)
- Freie Universität Berlin,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Ribas, I. (author)
- Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC,Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC)
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- Santos, N. C. (author)
- Universidade do Porto,University of Porto
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- Sarajlic, M. (author)
- Keele University
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- Segransan, D. (author)
- Université de Genève,University of Geneva
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- Simon, A.E. (author)
- Universität Bern,University of Bern
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- Singh, V. (author)
- Istituto nazionale di astrofisica (INAF)
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- Smith, A. M.S. (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Stalport, M. (author)
- Universite de Liège,University of Liège
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- Thomas, Nicolas (author)
- Universität Bern,University of Bern
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- Udry, S. (author)
- Université de Genève,University of Geneva
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- Ulmer, B. (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Venturini, J. (author)
- Université de Genève,University of Geneva
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- Villaver, E. (author)
- Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
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- Walton, N. A. (author)
- University Of Cambridge
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- Wilson, T.G. (author)
- The University of Warwick
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(creator_code:org_t)
- 2024
- 2024
- English.
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In: Astronomy and Astrophysics. - 0004-6361 .- 1432-0746. ; 686
- Related links:
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https://research.cha... (primary) (free)
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Subject headings
Close
- Context. White-light stellar flares are proxies for some of the most energetic types of flares, but their triggering mechanism is still poorly understood. As they are associated with strong X and ultraviolet emission, their study is particularly relevant to estimate the amount of high-energy irradiation onto the atmospheres of exoplanets, especially those in their stars’ habitable zone. Aims. We used the high-cadence, high-photometric capabilities of the CHEOPS and TESS space telescopes to study the detailed morphology of white-light flares occurring in a sample of 130 late-K and M stars, and compared our findings with results obtained at a lower cadence. Methods. We employed dedicated software for the reduction of 3 s cadence CHEOPS data, and adopted the 20 s cadence TESS data reduced by their official processing pipeline. We developed an algorithm to separate multi-peak flare profiles into their components, in order to contrast them to those of single-peak, classical flares. We also exploited this tool to estimate amplitudes and periodicities in a small sample of quasi-periodic pulsation (QPP) candidates. Results. Complex flares represent a significant percentage (≳30%) of the detected outburst events. Our findings suggest that high-impulse flares are more frequent than suspected from lower-cadence data, so that the most impactful flux levels that hit close-in exoplanets might be more time-limited than expected. We found significant differences in the duration distributions of single and complex flare components, but not in their peak luminosity. A statistical analysis of the flare parameter distributions provides marginal support for their description with a log-normal instead of a power-law function, leaving the door open to several flare formation scenarios. We tentatively confirmed previous results about QPPs in high-cadence photometry, report the possible detection of a pre-flare dip, and did not find hints of photometric variability due to an undetected flare background. Conclusions. The high-cadence study of stellar hosts might be crucial to evaluate the impact of their flares on close-in exoplanets, as their impulsive phase emission might otherwise be incorrectly estimated. Future telescopes such as PLATO and Ariel, thanks to their high-cadence capability, will help in this respect. As the details of flare profiles and of the shape of their parameter distributions are made more accessible by continuing to increase the instrument precision and time resolution, the models used to interpret them and their role in star-planet interactions might need to be updated constantly.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- methods: data analysis
- stars: activity
- techniques: photometric
- planetary systems
- stars: flare
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database
- By the author/editor
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Bruno, G.
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Pagano, I.
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Scandariato, Gae ...
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Florén, H.-G.
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Brandeker, A.
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Olofsson, G.
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show more...
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Maxted, P.
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Fortier, A.
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Sousa, S.G.
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Sulis, S.
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Van Grootel, V.
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Garai, Z.
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Boldog,
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Kriskovics, L.
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Szabó, Gy M.
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Gandolfi, D.
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Alibert, Y.
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Alonso, R.
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Bárczy, T.
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Barrado Navascue ...
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Barros, S.C.C.
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Baumjohann, W.
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Beck, M.
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Beck, T.
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Benz, W.
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Billot, N.
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Borsato, L.
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Broeg, C.
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Collier Cameron, ...
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Csizmadia, Szila ...
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Cubillos, P. E.
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Davies, M. B.
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Deleuil, M.
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Deline, A.
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Delrez, L.
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Demangeon, O.
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Demory, B.O.
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Ehrenreich, D.
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Erikson, Anders
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Farinato, J.
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Fossati, L.
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Fridlund, Malcol ...
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Gillon, Michaël
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Gudel, M.
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Günther, Maximil ...
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Heitzmann, A.
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Helling, Ch.
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Hoyer, S.
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Isaak, K.
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Kiss, L. L.
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Lam, K. W.F.
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Laskar, J.
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des Etangs, A. L ...
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Lendl, M.
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Magrin, D.
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Mordasini, C.
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Nascimbeni, Vale ...
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Ottensamer, R.
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Palle, Enric
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Peter, G.
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Piotto, Giampaol ...
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Pollacco, Don L.
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Queloz, D.
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Ragazzoni, Rober ...
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Rando, N.
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Ratti, F.
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Rauer, H.
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Ribas, I.
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Santos, N. C.
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Sarajlic, M.
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Segransan, D.
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Simon, A.E.
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Singh, V.
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Smith, A. M.S.
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Stalport, M.
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Thomas, Nicolas
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Udry, S.
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Ulmer, B.
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Venturini, J.
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Villaver, E.
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Walton, N. A.
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Wilson, T.G.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
- Articles in the publication
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Astronomy and As ...
- By the university
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Chalmers University of Technology