Glancing through the debris disk

Autor(en)

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

Abstrakt

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(en)

Institut für Astrophysik

Externe Organisation(en)

MTA Társadalomtudományi Kutatóközpont, Hungarian Academy of Sciences, Eötvös Loránd University Budapest, Stockholm University, Université Paris VI - Pierre-et-Marie-Curie, Université de recherche Paris Sciences et Lettres, Universität Genf, 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, Instituto de Astrofísica de Canarias (IAC), Universidad de La Laguna, Spanish National Research Council (CSIC), Institut d'Estudis Espacials de Catalunya (IEEC), Admatis, European Space Astronomy Centre (ESA), Österreichische Akademie der Wissenschaften (ÖAW), Université Grenoble-Alpes, Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Université de Paris, European Space Research & Technology Centre (ESA/ESTEC), Lund University, Université de Liège, INAF-Osservatorio Astrofisico di Catania, Leiden University, Chalmers University of Technology, University of Warwick, INAF - Osservatorio Astronomico di Padova, Keele University, Università degli Studi di Padova, Eidgenössische Technische Hochschule Zürich, University of Cambridge, Technische Universität Berlin, Freie Universität Berlin (FU)

Journal

Astronomy and Astrophysics

Band

671

Anzahl der Seiten

10

ISSN

0004-6361

DOI

https://doi.org/10.1051/0004-6361/202245101

Publikationsdatum

03-2023

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik, 103038 Weltraumforschung

Schlagwörter

ASJC Scopus Sachgebiete

Astronomy and Astrophysics, Space and Planetary Science

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/2cc0d1b5-cf9e-4219-a11c-390116004c8e