Glancing through the debris disk: Photometric analysis of DE Boo with CHEOPS
Abstract
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. 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 Piszk\'estet\H{o} and with the SOPHIE spectrograph in order to refine the astrophysical parameters of DE Boo. 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. 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.
Cite
@article{arxiv.2302.02710,
title = {Glancing through the debris disk: Photometric analysis of DE Boo with CHEOPS},
author = {Á. Boldog and Gy. M. Szabó and L. Kriskovics and A. Brandeker and F. Kiefer and A. Bekkelien and P. Guterman and G. Olofsson and A. E. Simon and D. Gandolfi and L. M. Serrano and T. G. Wilson and S. G. Sousa and A. Lecavelier des Etangs and Y. Alibert and R. Alonso and G. Anglada and T. Bandy and T. Bárczy and D. Barrado and S. C. C. Barros and W. Baumjohann and M. Beck and T. Beck and W. Benz and N. Billot and X. Bonfils and C. Broeg and M. Buder and J. Cabrera and S. Charnoz and A. Collier Cameron and C. Corral van Damme and Sz. Csizmadia and M. B. Davies and A. Deline and M. Deleuil and L. Delrez and O. D. S. Demangeon and B. -O. Demory and D. Ehrenreich and A. Erikson and J. Farinato and A. Fortier and L. Fossati and M. Fridlund and M. Gillon and M. Güdel and K. Heng and S. Hoyer and K. G. Isaak and L. L. Kiss and J. Laskar and M. Lendl and C. Lovis and D. Magrin and P. F. L. Maxted and M. Mecina and V. Nascimbeni and R. Ottensamer and I. Pagano and E. Pallé and G. Peter and G. Piotto and D. Pollacco and D. Queloz and R. Ragazzoni and N. Rando and H. Rauer and I. Ribas and N. C. Santos and G. Scandariato and D. Ségransan and A. M. S. Smith and M. Steller and N. Thomas and S. Udry and V. Van Grootel and N. A. Walton},
journal= {arXiv preprint arXiv:2302.02710},
year = {2023}
}
Comments
10 pages, 4 figures, 5 tables; accepted by Astronomy and Astrophysics