Glancing through the debris disk

Author(s): Boldog, Gy M. Szabó, L. Kriskovics, A. Brandeker, F. Kiefer, A. Bekkelien, P. Guterman, G. Olofsson, A. E. Simon, D. Gandolfi, L. M. Serrano, T. G. Wilson, S. G. Sousa, A. Lecavelier Des Etangs, Y. Alibert, R. Alonso, G. Anglada, T. Bandy, T. Bárczy, D. Barrado, S. C.C. Barros, W. Baumjohann, M. Beck, T. Beck, W. Benz, N. Billot, X. Bonfils, C. Broeg, M. Buder, J. Cabrera, S. Charnoz, A. Collier Cameron, C. Corral Van Damme, Sz Csizmadia, M. B. Davies, A. Deline, M. Deleuil, L. Delrez, O. D.S. Demangeon, B. O. Demory, D. Ehrenreich, A. Erikson, J. Farinato, A. Fortier, L. Fossati, M. Fridlund, M. Gillon, M. Güdel, K. Heng, S. Hoyer, K. G. Isaak, L. L. Kiss, J. Laskar, M. Lendl, C. Lovis, D. Magrin, P. F.L. Maxted, M. Mecina, V. Nascimbeni, R. Ottensamer, I. Pagano, E. Pallé, G. Peter, G. Piotto, D. Pollacco, D. Queloz, R. Ragazzoni, N. Rando, H. Rauer, I. Ribas, N. C. Santos, G. Scandariato, D. Ségransan, A. M.S. Smith, M. Steller, N. Thomas, S. Udry, V. Van Grootel, N. A. Walton
Abstract: Aims. DE Boo is a unique system, with an edge-on view through the debris disk around the star. The disk, which is analogous to the Kuiper belt in the Solar System, was reported to extend from 74 to 84 AU from the central star. The high photometric precision of the Characterising Exoplanet Satellite (CHEOPS) provided an exceptional opportunity to observe small variations in the light curve due to transiting material in the disk. This is a unique chance to investigate processes in the debris disk. Methods. Photometric observations of DE Boo of a total of four days were carried out with CHEOPS. Photometric variations due to spots on the stellar surface were subtracted from the light curves by applying a two-spot model and a fourth-order polynomial. The photometric observations were accompanied by spectroscopic measurements with the 1m RCC telescope at Piszkésteto and with the SOPHIE spectrograph in order to refine the astrophysical parameters of DE Boo. Results. We present a detailed analysis of the photometric observation of DE Boo. We report the presence of nonperiodic transient features in the residual light curves with a transit duration of 0.3-0.8 days. We calculated the maximum distance of the material responsible for these variations to be 2.47 AU from the central star, much closer than most of the mass of the debris disk. Furthermore, we report the first observation of flaring events in this system. Conclusions. We interpreted the transient features as the result of scattering in an inner debris disk around DE Boo. The processes responsible for these variations were investigated in the context of interactions between planetesimals in the system.
Organisation(s): Department of Astrophysics
External organisation(s): Eötvös Loránd Research Network, Hungarian Academy of Sciences, Eötvös Loránd University Budapest, Stockholm University, Université Paris VI - Pierre-et-Marie-Curie, Université de recherche Paris Sciences et Lettres, Université de Genève, Aix-Marseille Université, National Institute for Earth Sciences & Astronomy (INSU-CNRS), Universität Bern, Università degli Studi di Torino, University of St. Andrews, Universidade do Porto, Institute of Astrophysics of the Canary Islands, University of La Laguna, Spanish National Research Council (CSIC), Institute of Space Studies of Catalonia (IEEC), Admatis Ltd., European Space Astronomy Centre (ESA), Österreichische Akademie der Wissenschaften (ÖAW), University of Grenoble Alpes, Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Université de Paris, Science and Operations Department - Science Division (SCI-SC), Lund University, Université de Liège, INAF-Osservatorio Astrofisico di Catania, Leiden University, Chalmers University of Technology, University of Warwick, Osservatorio Astronomico, Keele University, University of Padova, Eidgenössische Technische Hochschule Zürich, University of Cambridge, Technische Universität Berlin, Freie Universität Berlin (FU)
Journal: Astronomy and Astrophysics
Volume: 671
No. of pages: 10
ISSN: 0004-6361
DOI: https://doi.org/10.1051/0004-6361/202245101
Publication date: 03-2023
Peer reviewed: Yes
Austrian Fields of Science 2012: 103003 Astronomy, 103004 Astrophysics, 103038 Space exploration
Keywords
ASJC Scopus subject areas: Astronomy and Astrophysics, Space and Planetary Science
Portal url: https://ucrisportal.univie.ac.at/en/publications/2cc0d1b5-cf9e-4219-a11c-390116004c8e

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