CHEOPS observations confirm nodal precession in the WASP-33 system

A. M.S. Smith; S. Z. Csizmadia; V. Van Grootel; M. Lendl; C. M. Persson; G. Olofsson; D. Ehrenreich; M. N. Günther; A. Heitzmann; S. C.C. Barros; A. Bonfanti; A. Brandeker; J. Cabrera; O. D.S. Demangeon; L. Fossati; J. V. Harre; M. J. Hooton; S. Hoyer; S. Z. Kalman; S. Salmon; S. G. Sousa; G. Y.M. Szabó; T. G. Wilson; Y. Alibert; R. Alonso; J. Asquier; T. Bárczy; D. Barrado; W. Baumjohann; W. Benz; N. Billot; L. Borsato; C. Broeg; A. Collier Cameron; A. C.M. Correia; P. E. Cubillos; M. B. Davies; M. Deleuil; A. Deline; B. O. Demory; A. Derekas; B. Edwards; J. A. Egger; A. Erikson; A. Fortier; M. Fridlund; D. Gandolfi; K. Gazeas; M. Gillon; M. Güdel; J. Hasiba; C. H. Helling; K. G. Isaak; L. L. Kiss; J. Korth; K. W.F. Lam; J. Laskar; A. Lecavelier des Etangs; D. Magrin; P. F.L. Maxted; B. Merín; C. Mordasini; V. Nascimbeni; R. Ottensamer; I. Pagano; E. Pallé; G. Peter; D. Piazza; G. Piotto; D. Pollacco; D. Queloz; R. Ragazzoni; N. Rando; H. Rauer; I. Ribas; N. C. Santos; G. Scandariato; D. Ségransan; A. E. Simon; M. Stalport; S. Sulis; S. Udry; S. Ulmer-Moll; J. Venturini; E. Villaver; V. Viotto; I. Walter; N. A. Walton; S. Wolf

doi:10.1051/0004-6361/202452151

CHEOPS observations confirm nodal precession in the WASP-33 system

A. M.S. Smith^*, S. Z. Csizmadia, V. Van Grootel, M. Lendl, C. M. Persson, G. Olofsson, D. Ehrenreich, M. N. Günther, A. Heitzmann, S. C.C. Barros, A. Bonfanti, A. Brandeker, J. Cabrera, O. D.S. Demangeon, L. Fossati, J. V. Harre, M. J. Hooton, S. Hoyer, S. Z. Kalman, S. SalmonS. G. Sousa, G. Y.M. Szabó, T. G. Wilson, Y. Alibert, R. Alonso, J. Asquier, T. Bárczy, D. Barrado, W. Baumjohann, W. Benz, N. Billot, L. Borsato, C. Broeg, A. Collier Cameron, A. C.M. Correia, P. E. Cubillos, M. B. Davies, M. Deleuil, A. Deline, B. O. Demory, A. Derekas, B. Edwards, J. A. Egger, A. Erikson, A. Fortier, M. Fridlund, D. Gandolfi, K. Gazeas, M. Gillon, M. Güdel, J. Hasiba, C. H. Helling, K. G. Isaak, L. L. Kiss, J. Korth, K. W.F. Lam, J. Laskar, A. Lecavelier des Etangs, D. Magrin, P. F.L. Maxted, B. Merín, C. Mordasini, V. Nascimbeni, R. Ottensamer, I. Pagano, E. Pallé, G. Peter, D. Piazza, G. Piotto, D. Pollacco, D. Queloz, R. Ragazzoni, N. Rando, H. Rauer, I. Ribas, N. C. Santos, G. Scandariato, D. Ségransan, A. E. Simon, M. Stalport, S. Sulis, S. Udry, S. Ulmer-Moll, J. Venturini, E. Villaver, V. Viotto, I. Walter, N. A. Walton, S. Wolf

^*Korrespondierende/r Autor/-in für diese Arbeit

Publikation: Beitrag in einer Fachzeitschrift › Artikel › Begutachtung

Abstract

Aims. We aim to observe the transits and occultations of WASP-33 b, which orbits a rapidly rotating δ Scuti pulsator, with the goal of measuring the orbital obliquity via the gravity-darkening effect, and constraining the geometric albedo via the occultation depth. Methods. We observed four transits and four occultations with CHEOPS, and employ a variety of techniques to remove the effects of the stellar pulsations from the light curves, as well as the usual CHEOPS systematic effects. We also performed a comprehensive analysis of low-resolution spectral and Gaia data to re-determine the stellar properties of WASP-33. Results. We measure an orbital obliquity 111.3⁺₋⁰₀_.²₇ degrees, which is consistent with previous measurements made via Doppler tomography. We also measure the planetary impact parameter, and confirm that this parameter is undergoing rapid secular evolution as a result of nodal precession of the planetary orbit. This precession allows us to determine the second-order fluid Love number of the star, which we find agrees well with the predictions of theoretical stellar models. We are unable to robustly measure a unique value of the occultation depth, and emphasise the need for long-baseline observations to better measure the pulsation periods.

Originalsprache	englisch
Aufsatznummer	A128
Fachzeitschrift	Astronomy and Astrophysics
Jahrgang	693
DOIs	https://doi.org/10.1051/0004-6361/202452151
Publikationsstatus	Veröffentlicht - 1 Jan. 2025

ASJC Scopus subject areas

Astronomie und Astrophysik
Astronomie und Planetologie

Zugriff auf Dokument

10.1051/0004-6361/202452151Lizenz: CC BY 4.0

Andere Dateien und Links

Verknüpfung zur Publikation in Scopus

Dieses zitieren

Smith, A. M. S., Csizmadia, S. Z., Van Grootel, V., Lendl, M., Persson, C. M., Olofsson, G., Ehrenreich, D., Günther, M. N., Heitzmann, A., Barros, S. C. C., Bonfanti, A., Brandeker, A., Cabrera, J., Demangeon, O. D. S., Fossati, L., Harre, J. V., Hooton, M. J., Hoyer, S., Kalman, S. Z., ... Wolf, S. (2025). CHEOPS observations confirm nodal precession in the WASP-33 system. Astronomy and Astrophysics, 693, Artikel A128. https://doi.org/10.1051/0004-6361/202452151

Smith, AMS, Csizmadia, SZ, Van Grootel, V, Lendl, M, Persson, CM, Olofsson, G, Ehrenreich, D, Günther, MN, Heitzmann, A, Barros, SCC, Bonfanti, A, Brandeker, A, Cabrera, J, Demangeon, ODS, Fossati, L, Harre, JV, Hooton, MJ, Hoyer, S, Kalman, SZ, Salmon, S, Sousa, SG, Szabó, GYM, Wilson, TG, Alibert, Y, Alonso, R, Asquier, J, Bárczy, T, Barrado, D, Baumjohann, W, Benz, W, Billot, N, Borsato, L, Broeg, C, Cameron, AC, Correia, ACM, Cubillos, PE, Davies, MB, Deleuil, M, Deline, A, Demory, BO, Derekas, A, Edwards, B, Egger, JA, Erikson, A, Fortier, A, Fridlund, M, Gandolfi, D, Gazeas, K, Gillon, M, Güdel, M, Hasiba, J, Helling, CH, Isaak, KG, Kiss, LL, Korth, J, Lam, KWF, Laskar, J, Lecavelier des Etangs, A, Magrin, D, Maxted, PFL, Merín, B, Mordasini, C, Nascimbeni, V, Ottensamer, R, Pagano, I, Pallé, E, Peter, G, Piazza, D, Piotto, G, Pollacco, D, Queloz, D, Ragazzoni, R, Rando, N, Rauer, H, Ribas, I, Santos, NC, Scandariato, G, Ségransan, D, Simon, AE, Stalport, M, Sulis, S, Udry, S, Ulmer-Moll, S, Venturini, J, Villaver, E, Viotto, V, Walter, I, Walton, NA & Wolf, S 2025, 'CHEOPS observations confirm nodal precession in the WASP-33 system', Astronomy and Astrophysics, Jg. 693, A128. https://doi.org/10.1051/0004-6361/202452151

@article{3c554574de6d4846a7c1f252d97af580,

title = "CHEOPS observations confirm nodal precession in the WASP-33 system",

abstract = "Aims. We aim to observe the transits and occultations of WASP-33 b, which orbits a rapidly rotating δ Scuti pulsator, with the goal of measuring the orbital obliquity via the gravity-darkening effect, and constraining the geometric albedo via the occultation depth. Methods. We observed four transits and four occultations with CHEOPS, and employ a variety of techniques to remove the effects of the stellar pulsations from the light curves, as well as the usual CHEOPS systematic effects. We also performed a comprehensive analysis of low-resolution spectral and Gaia data to re-determine the stellar properties of WASP-33. Results. We measure an orbital obliquity 111.3+−00.27 degrees, which is consistent with previous measurements made via Doppler tomography. We also measure the planetary impact parameter, and confirm that this parameter is undergoing rapid secular evolution as a result of nodal precession of the planetary orbit. This precession allows us to determine the second-order fluid Love number of the star, which we find agrees well with the predictions of theoretical stellar models. We are unable to robustly measure a unique value of the occultation depth, and emphasise the need for long-baseline observations to better measure the pulsation periods.",

keywords = "planets and satellites: dynamical evolution and stability, planets and satellites: fundamental parameters, planets and satellites: gaseous planets, planets and satellites: individual: WASP-33 b, stars: individual: WASP-33, stars: oscillations",

author = "Smith, {A. M.S.} and Csizmadia, {S. Z.} and {Van Grootel}, V. and M. Lendl and Persson, {C. M.} and G. Olofsson and D. Ehrenreich and G{\"u}nther, {M. N.} and A. Heitzmann and Barros, {S. C.C.} and A. Bonfanti and A. Brandeker and J. Cabrera and Demangeon, {O. D.S.} and L. Fossati and Harre, {J. V.} and Hooton, {M. J.} and S. Hoyer and Kalman, {S. Z.} and S. Salmon and Sousa, {S. G.} and Szab{\'o}, {G. Y.M.} and Wilson, {T. G.} and Y. Alibert and R. Alonso and J. Asquier and T. B{\'a}rczy and D. Barrado and W. Baumjohann and W. Benz and N. Billot and L. Borsato and C. Broeg and Cameron, {A. Collier} and Correia, {A. C.M.} and Cubillos, {P. E.} and Davies, {M. B.} and M. Deleuil and A. Deline and Demory, {B. O.} and A. Derekas and B. Edwards and Egger, {J. A.} and A. Erikson and A. Fortier and M. Fridlund and D. Gandolfi and K. Gazeas and M. Gillon and M. G{\"u}del and J. Hasiba and Helling, {C. H.} and Isaak, {K. G.} and Kiss, {L. L.} and J. Korth and Lam, {K. W.F.} and J. Laskar and {Lecavelier des Etangs}, A. and D. Magrin and Maxted, {P. F.L.} and B. Mer{\'i}n and C. Mordasini and V. Nascimbeni and R. Ottensamer and I. Pagano and E. Pall{\'e} and G. Peter and D. Piazza and G. Piotto and D. Pollacco and D. Queloz and R. Ragazzoni and N. Rando and H. Rauer and I. Ribas and Santos, {N. C.} and G. Scandariato and D. S{\'e}gransan and Simon, {A. E.} and M. Stalport and S. Sulis and S. Udry and S. Ulmer-Moll and J. Venturini and E. Villaver and V. Viotto and I. Walter and Walton, {N. A.} and S. Wolf",

note = "Publisher Copyright: {\textcopyright} The Authors 2025.",

year = "2025",

month = jan,

day = "1",

doi = "10.1051/0004-6361/202452151",

language = "English",

volume = "693",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

TY - JOUR

T1 - CHEOPS observations confirm nodal precession in the WASP-33 system

AU - Smith, A. M.S.

AU - Csizmadia, S. Z.

AU - Van Grootel, V.

AU - Lendl, M.

AU - Persson, C. M.

AU - Olofsson, G.

AU - Ehrenreich, D.

AU - Günther, M. N.

AU - Heitzmann, A.

AU - Barros, S. C.C.

AU - Bonfanti, A.

AU - Brandeker, A.

AU - Cabrera, J.

AU - Demangeon, O. D.S.

AU - Fossati, L.

AU - Harre, J. V.

AU - Hooton, M. J.

AU - Hoyer, S.

AU - Kalman, S. Z.

AU - Salmon, S.

AU - Sousa, S. G.

AU - Szabó, G. Y.M.

AU - Wilson, T. G.

AU - Alibert, Y.

AU - Alonso, R.

AU - Asquier, J.

AU - Bárczy, T.

AU - Barrado, D.

AU - Baumjohann, W.

AU - Benz, W.

AU - Billot, N.

AU - Borsato, L.

AU - Broeg, C.

AU - Cameron, A. Collier

AU - Correia, A. C.M.

AU - Cubillos, P. E.

AU - Davies, M. B.

AU - Deleuil, M.

AU - Deline, A.

AU - Demory, B. O.

AU - Derekas, A.

AU - Edwards, B.

AU - Egger, J. A.

AU - Erikson, A.

AU - Fortier, A.

AU - Fridlund, M.

AU - Gandolfi, D.

AU - Gazeas, K.

AU - Gillon, M.

AU - Güdel, M.

AU - Hasiba, J.

AU - Helling, C. H.

AU - Isaak, K. G.

AU - Kiss, L. L.

AU - Korth, J.

AU - Lam, K. W.F.

AU - Laskar, J.

AU - Lecavelier des Etangs, A.

AU - Magrin, D.

AU - Maxted, P. F.L.

AU - Merín, B.

AU - Mordasini, C.

AU - Nascimbeni, V.

AU - Ottensamer, R.

AU - Pagano, I.

AU - Pallé, E.

AU - Peter, G.

AU - Piazza, D.

AU - Piotto, G.

AU - Pollacco, D.

AU - Queloz, D.

AU - Ragazzoni, R.

AU - Rando, N.

AU - Rauer, H.

AU - Ribas, I.

AU - Santos, N. C.

AU - Scandariato, G.

AU - Ségransan, D.

AU - Simon, A. E.

AU - Stalport, M.

AU - Sulis, S.

AU - Udry, S.

AU - Ulmer-Moll, S.

AU - Venturini, J.

AU - Villaver, E.

AU - Viotto, V.

AU - Walter, I.

AU - Walton, N. A.

AU - Wolf, S.

PY - 2025/1/1

Y1 - 2025/1/1

N2 - Aims. We aim to observe the transits and occultations of WASP-33 b, which orbits a rapidly rotating δ Scuti pulsator, with the goal of measuring the orbital obliquity via the gravity-darkening effect, and constraining the geometric albedo via the occultation depth. Methods. We observed four transits and four occultations with CHEOPS, and employ a variety of techniques to remove the effects of the stellar pulsations from the light curves, as well as the usual CHEOPS systematic effects. We also performed a comprehensive analysis of low-resolution spectral and Gaia data to re-determine the stellar properties of WASP-33. Results. We measure an orbital obliquity 111.3+−00.27 degrees, which is consistent with previous measurements made via Doppler tomography. We also measure the planetary impact parameter, and confirm that this parameter is undergoing rapid secular evolution as a result of nodal precession of the planetary orbit. This precession allows us to determine the second-order fluid Love number of the star, which we find agrees well with the predictions of theoretical stellar models. We are unable to robustly measure a unique value of the occultation depth, and emphasise the need for long-baseline observations to better measure the pulsation periods.

AB - Aims. We aim to observe the transits and occultations of WASP-33 b, which orbits a rapidly rotating δ Scuti pulsator, with the goal of measuring the orbital obliquity via the gravity-darkening effect, and constraining the geometric albedo via the occultation depth. Methods. We observed four transits and four occultations with CHEOPS, and employ a variety of techniques to remove the effects of the stellar pulsations from the light curves, as well as the usual CHEOPS systematic effects. We also performed a comprehensive analysis of low-resolution spectral and Gaia data to re-determine the stellar properties of WASP-33. Results. We measure an orbital obliquity 111.3+−00.27 degrees, which is consistent with previous measurements made via Doppler tomography. We also measure the planetary impact parameter, and confirm that this parameter is undergoing rapid secular evolution as a result of nodal precession of the planetary orbit. This precession allows us to determine the second-order fluid Love number of the star, which we find agrees well with the predictions of theoretical stellar models. We are unable to robustly measure a unique value of the occultation depth, and emphasise the need for long-baseline observations to better measure the pulsation periods.

KW - planets and satellites: dynamical evolution and stability

KW - planets and satellites: fundamental parameters

KW - planets and satellites: gaseous planets

KW - planets and satellites: individual: WASP-33 b

KW - stars: individual: WASP-33

KW - stars: oscillations

UR - http://www.scopus.com/inward/record.url?scp=85215419388&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/202452151

DO - 10.1051/0004-6361/202452151

M3 - Article

AN - SCOPUS:85215419388

SN - 0004-6361

VL - 693

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A128

ER -

CHEOPS observations confirm nodal precession in the WASP-33 system

Abstract

ASJC Scopus subject areas

Zugriff auf Dokument

Andere Dateien und Links

Fingerprint

Dieses zitieren