Transit timing variations of AU Microscopii b and c

Gy M. Szabo; Z. Garai; A. Brandeker; D. Gandolfi; T. G. Wilson; A. Deline; G. Olofsson; A. Fortier; D. Queloz; L. Borsato; F. Kiefer; A.  Lecavelier des Etangs; M. Lendl; L. M. Serrano; S. Sulis; S. Ulmer Moll; V. Van Grootel; Y. Alibert; R. Alonso; G. Anglada; T. Barczy; D. Barrado Y Navascues; S. C. C. Barros; W. Baumjohann; T. Beck; W. Benz; N. Billot; A. Bonfanti; X. Bonfils; C. Broeg; J. Cabrera; S. Charnoz; A. Collier Cameron; Sz Csizmadia; M. B. Davies; M. Deleuil; L. Delrez; O. Demangeon; B-O Demory; D. Ehrenreich; A. Erikson; L. Fossati; M. Fridlund; M. Gillon; M. Gudel; K. Heng; S. Hoyer; K. G. Isaak; L. L. Kiss; J. Laskar; C. Lovis; D. Magrin; P. F. L. Maxted; M. Mecina; V. Nascimbeni; R. Ottensamer; I. Pagano; E. Palle; G. Peter; G. Piotto; D. Pollacco; R. Ragazzoni; N. Rando; H. Rauer; I. Ribas; N. C. Santos; M. Sarajlic; G. Scandariato; D. Segransan; A. E. Simon; A. M. S. Smith; S. G. Sousa; M. Steller; N. Thomas; S. Udry; F. Verrecchia; N. Walton; D. Wolter

doi:10.1051/0004-6361/202243076

Transit timing variations of AU Microscopii b and c

Gy M. Szabo^*, Z. Garai, A. Brandeker, D. Gandolfi, T. G. Wilson, A. Deline, G. Olofsson, A. Fortier, D. Queloz, L. Borsato, F. Kiefer, A. Lecavelier des Etangs, M. Lendl, L. M. Serrano, S. Sulis, S. Ulmer Moll, V. Van Grootel, Y. Alibert, R. Alonso, G. AngladaT. Barczy, D. Barrado Y Navascues, S. C. C. Barros, W. Baumjohann, T. Beck, W. Benz, N. Billot, A. Bonfanti, X. Bonfils, C. Broeg, J. Cabrera, S. Charnoz, A. Collier Cameron, Sz Csizmadia, M. B. Davies, M. Deleuil, L. Delrez, O. Demangeon, B-O Demory, D. Ehrenreich, A. Erikson, L. Fossati, M. Fridlund, M. Gillon, M. Gudel, K. Heng, S. Hoyer, K. G. Isaak, L. L. Kiss, J. Laskar, C. Lovis, D. Magrin, P. F. L. Maxted, M. Mecina, V. Nascimbeni, R. Ottensamer, I. Pagano, E. Palle, G. Peter, G. Piotto, D. Pollacco, R. Ragazzoni, N. Rando, H. Rauer, I. Ribas, N. C. Santos, M. Sarajlic, G. Scandariato, D. Segransan, A. E. Simon, A. M. S. Smith, S. G. Sousa, M. Steller, N. Thomas, S. Udry, F. Verrecchia, N. Walton, D. Wolter

^*Corresponding author for this work

Research output: Contribution to journal › Letter › peer-review

Abstract

Here we report large-amplitude transit timing variations (TTVs) for AU Microcopii b and c as detected in combined TESS (2018, 2020) and CHEOPS (2020, 2021) transit observations. AU Mic is a young planetary system with a debris disk and two transiting warm Neptunes. A TTV on the order of several minutes was previously reported for AU Mic b, which was suggested to be an outcome of mutual perturbations between the planets in the system. In 2021, we observed AU Mic b (five transits) and c (three transits) with the CHEOPS space telescope to follow-up the TTV of AU Mic b and possibly detect a TTV for AU Mic c. When analyzing TESS and CHEOPS 2020-2021 measurements together, we find that a prominent TTV emerges with a full span of >= 23 min between the two TTV extrema. Assuming that the period change results from a periodic process -such as mutual perturbations- we demonstrate that the times of transits in the summer of 2022 are expected to be 30-85 min later than predicted by the available linear ephemeris.

Original language	English
Article number	L7
Number of pages	9
Journal	Astronomy and Astrophysics
Volume	659
DOIs	https://doi.org/10.1051/0004-6361/202243076
Publication status	Published - 10 Mar 2022

Keywords

Planets and satellites: fundamental parameters
Planets and satellites: individual
AU Mic b and c

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10.1051/0004-6361/202243076

Szabó_2022_AA_Transit-timing-variations-AUMicroscopii-b-and-c_VoR
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Transit timing variations of AU Microscopii b and c* (dataset)
Wilson, T. G. (Creator) & Cameron, A. C. (Creator), VizieR On-line Data Catalog, 2022
http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/659/L7
Dataset

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Szabo, G. M., Garai, Z., Brandeker, A., Gandolfi, D., Wilson, T. G., Deline, A., Olofsson, G., Fortier, A., Queloz, D., Borsato, L., Kiefer, F., Lecavelier des Etangs, A., Lendl, M., Serrano, L. M., Sulis, S., Moll, S. U., Van Grootel, V., Alibert, Y., Alonso, R., ... Wolter, D. (2022). Transit timing variations of AU Microscopii b and c. Astronomy and Astrophysics, 659, Article L7. https://doi.org/10.1051/0004-6361/202243076

@article{5946ea6f24914bb197e246e31a196401,

title = "Transit timing variations of AU Microscopii b and c",

abstract = "Here we report large-amplitude transit timing variations (TTVs) for AU Microcopii b and c as detected in combined TESS (2018, 2020) and CHEOPS (2020, 2021) transit observations. AU Mic is a young planetary system with a debris disk and two transiting warm Neptunes. A TTV on the order of several minutes was previously reported for AU Mic b, which was suggested to be an outcome of mutual perturbations between the planets in the system. In 2021, we observed AU Mic b (five transits) and c (three transits) with the CHEOPS space telescope to follow-up the TTV of AU Mic b and possibly detect a TTV for AU Mic c. When analyzing TESS and CHEOPS 2020-2021 measurements together, we find that a prominent TTV emerges with a full span of >= 23 min between the two TTV extrema. Assuming that the period change results from a periodic process -such as mutual perturbations- we demonstrate that the times of transits in the summer of 2022 are expected to be 30-85 min later than predicted by the available linear ephemeris.",

keywords = "Planets and satellites: fundamental parameters, Planets and satellites: individual, AU Mic b and c",

author = "Szabo, {Gy M.} and Z. Garai and A. Brandeker and D. Gandolfi and Wilson, {T. G.} and A. Deline and G. Olofsson and A. Fortier and D. Queloz and L. Borsato and F. Kiefer and {Lecavelier des Etangs}, A. and M. Lendl and Serrano, {L. M.} and S. Sulis and Moll, {S. Ulmer} and {Van Grootel}, V. and Y. Alibert and R. Alonso and G. Anglada and T. Barczy and {Barrado Y Navascues}, D. and Barros, {S. C. C.} and W. Baumjohann and T. Beck and W. Benz and N. Billot and A. Bonfanti and X. Bonfils and C. Broeg and J. Cabrera and S. Charnoz and Cameron, {A. Collier} and Sz Csizmadia and Davies, {M. B.} and M. Deleuil and L. Delrez and O. Demangeon and B-O Demory and D. Ehrenreich and A. Erikson and L. Fossati and M. Fridlund and M. Gillon and M. Gudel and K. Heng and S. Hoyer and Isaak, {K. G.} and Kiss, {L. L.} and J. Laskar and C. Lovis and D. Magrin and Maxted, {P. F. L.} and M. Mecina and V. Nascimbeni and R. Ottensamer and I. Pagano and E. Palle and G. Peter and G. Piotto and D. Pollacco and R. Ragazzoni and N. Rando and H. Rauer and I. Ribas and Santos, {N. C.} and M. Sarajlic and G. Scandariato and D. Segransan and Simon, {A. E.} and Smith, {A. M. S.} and Sousa, {S. G.} and M. Steller and N. Thomas and S. Udry and F. Verrecchia and N. Walton and D. Wolter",

note = "Funding: A.C.C. and T.W. acknowledge support from STFC consolidated grant number ST/M001296/1.",

year = "2022",

month = mar,

day = "10",

doi = "10.1051/0004-6361/202243076",

language = "English",

volume = "659",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP SCIENCES S A",

}

Szabo, GM, Garai, Z, Brandeker, A, Gandolfi, D, Wilson, TG, Deline, A, Olofsson, G, Fortier, A, Queloz, D, Borsato, L, Kiefer, F, Lecavelier des Etangs, A, Lendl, M, Serrano, LM, Sulis, S, Moll, SU, Van Grootel, V, Alibert, Y, Alonso, R, Anglada, G, Barczy, T, Barrado Y Navascues, D, Barros, SCC, Baumjohann, W, Beck, T, Benz, W, Billot, N, Bonfanti, A, Bonfils, X, Broeg, C, Cabrera, J, Charnoz, S, Cameron, AC, Csizmadia, S, Davies, MB, Deleuil, M, Delrez, L, Demangeon, O, Demory, B-O, Ehrenreich, D, Erikson, A, Fossati, L, Fridlund, M, Gillon, M, Gudel, M, Heng, K, Hoyer, S, Isaak, KG, Kiss, LL, Laskar, J, Lovis, C, Magrin, D, Maxted, PFL, Mecina, M, Nascimbeni, V, Ottensamer, R, Pagano, I, Palle, E, Peter, G, Piotto, G, Pollacco, D, Ragazzoni, R, Rando, N, Rauer, H, Ribas, I, Santos, NC, Sarajlic, M, Scandariato, G, Segransan, D, Simon, AE, Smith, AMS, Sousa, SG, Steller, M, Thomas, N, Udry, S, Verrecchia, F, Walton, N & Wolter, D 2022, 'Transit timing variations of AU Microscopii b and c', Astronomy and Astrophysics, vol. 659, L7. https://doi.org/10.1051/0004-6361/202243076

TY - JOUR

T1 - Transit timing variations of AU Microscopii b and c

AU - Szabo, Gy M.

AU - Garai, Z.

AU - Brandeker, A.

AU - Gandolfi, D.

AU - Wilson, T. G.

AU - Deline, A.

AU - Olofsson, G.

AU - Fortier, A.

AU - Queloz, D.

AU - Borsato, L.

AU - Kiefer, F.

AU - Lecavelier des Etangs, A.

AU - Lendl, M.

AU - Serrano, L. M.

AU - Sulis, S.

AU - Moll, S. Ulmer

AU - Van Grootel, V.

AU - Alibert, Y.

AU - Alonso, R.

AU - Anglada, G.

AU - Barczy, T.

AU - Barrado Y Navascues, D.

AU - Barros, S. C. C.

AU - Baumjohann, W.

AU - Beck, T.

AU - Benz, W.

AU - Billot, N.

AU - Bonfanti, A.

AU - Bonfils, X.

AU - Broeg, C.

AU - Cabrera, J.

AU - Charnoz, S.

AU - Cameron, A. Collier

AU - Csizmadia, Sz

AU - Davies, M. B.

AU - Deleuil, M.

AU - Delrez, L.

AU - Demangeon, O.

AU - Demory, B-O

AU - Ehrenreich, D.

AU - Erikson, A.

AU - Fossati, L.

AU - Fridlund, M.

AU - Gillon, M.

AU - Gudel, M.

AU - Heng, K.

AU - Hoyer, S.

AU - Isaak, K. G.

AU - Kiss, L. L.

AU - Laskar, J.

AU - Lovis, C.

AU - Magrin, D.

AU - Maxted, P. F. L.

AU - Mecina, M.

AU - Nascimbeni, V.

AU - Ottensamer, R.

AU - Pagano, I.

AU - Palle, E.

AU - Peter, G.

AU - Piotto, G.

AU - Pollacco, D.

AU - Ragazzoni, R.

AU - Rando, N.

AU - Rauer, H.

AU - Ribas, I.

AU - Santos, N. C.

AU - Sarajlic, M.

AU - Scandariato, G.

AU - Segransan, D.

AU - Simon, A. E.

AU - Smith, A. M. S.

AU - Sousa, S. G.

AU - Steller, M.

AU - Thomas, N.

AU - Udry, S.

AU - Verrecchia, F.

AU - Walton, N.

AU - Wolter, D.

N1 - Funding: A.C.C. and T.W. acknowledge support from STFC consolidated grant number ST/M001296/1.

PY - 2022/3/10

Y1 - 2022/3/10

N2 - Here we report large-amplitude transit timing variations (TTVs) for AU Microcopii b and c as detected in combined TESS (2018, 2020) and CHEOPS (2020, 2021) transit observations. AU Mic is a young planetary system with a debris disk and two transiting warm Neptunes. A TTV on the order of several minutes was previously reported for AU Mic b, which was suggested to be an outcome of mutual perturbations between the planets in the system. In 2021, we observed AU Mic b (five transits) and c (three transits) with the CHEOPS space telescope to follow-up the TTV of AU Mic b and possibly detect a TTV for AU Mic c. When analyzing TESS and CHEOPS 2020-2021 measurements together, we find that a prominent TTV emerges with a full span of >= 23 min between the two TTV extrema. Assuming that the period change results from a periodic process -such as mutual perturbations- we demonstrate that the times of transits in the summer of 2022 are expected to be 30-85 min later than predicted by the available linear ephemeris.

AB - Here we report large-amplitude transit timing variations (TTVs) for AU Microcopii b and c as detected in combined TESS (2018, 2020) and CHEOPS (2020, 2021) transit observations. AU Mic is a young planetary system with a debris disk and two transiting warm Neptunes. A TTV on the order of several minutes was previously reported for AU Mic b, which was suggested to be an outcome of mutual perturbations between the planets in the system. In 2021, we observed AU Mic b (five transits) and c (three transits) with the CHEOPS space telescope to follow-up the TTV of AU Mic b and possibly detect a TTV for AU Mic c. When analyzing TESS and CHEOPS 2020-2021 measurements together, we find that a prominent TTV emerges with a full span of >= 23 min between the two TTV extrema. Assuming that the period change results from a periodic process -such as mutual perturbations- we demonstrate that the times of transits in the summer of 2022 are expected to be 30-85 min later than predicted by the available linear ephemeris.

KW - Planets and satellites: fundamental parameters

KW - Planets and satellites: individual

KW - AU Mic b and c

U2 - 10.1051/0004-6361/202243076

DO - 10.1051/0004-6361/202243076

M3 - Letter

SN - 0004-6361

VL - 659

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - L7

ER -

Transit timing variations of AU Microscopii b and c

Abstract

Keywords

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Transit timing variations of AU Microscopii b and c* (dataset)

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