Multi-site campaign for transit timing variations of WASP-12 b: Possible detection of a long-period signal of planetary origin a long-period signal of planetary origin

G. Maciejewski, D. Dimitrov, M. Seeliger, St Raetz, L. Bukowiecki, M. Kitze, R. Errmann, G. Nowak, A. Niedzielski, V. Popov, C. Marka, K. Goździewski, R. Neuhäuser, J. Ohlert, T. C. Hinse, J. W. Lee, C. U. Lee, J. N. Yoon, A. Berndt, H. GilbertCh Ginski, M. M. Hohle, M. Mugrauer, T. Röll, T. O B Schmidt, N. Tetzlaff, L. Mancini, J. Southworth, M. Dall'Ora, S. Ciceri, R. Zambelli, G. Corfini, H. Takahashi, K. Tachihara, J. Benkő, K. Sárneczky, Gy M. Szabo, T. N. Varga, M. Vaňko, Y. C. Joshi, W. P. Chen

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Aims. The transiting planet WASP-12 b was identified as a potential target for transit-timing studies because a departure from a linear ephemeris has been reported in the literature. Such deviations could be caused by an additional planet in the system. We attempt to confirm the claimed variations in transit timing and interpret their origin. Methods. We organised a multi-site campaign to observe transits by WASP-12 b in three observing seasons, using 0.5-2.6-metre telescopes. Results. We obtained 61 transit light curves, many of them with sub-millimagnitude precision. The simultaneous analysis of the best-quality datasets allowed us to obtain refined system parameters, which agree with values reported in previous studies. The residuals versus a linear ephemeris reveal a possible periodic signal that may be approximated by a sinusoid with an amplitude of 0.00068 ± 0.00013 d and period of 500 ± 20 orbital periods of WASP-12 b. The joint analysis of timing data and published radial velocity measurements results in a two-planet model that explains observations better than do single-planet scenarios. We hypothesise that WASP-12 b might not be the only planet in the system, and there might be the additional 0.1 M Jup body on a 3.6-d eccentric orbit. A dynamical analysis indicates that the proposed two-planet system is stable on long timescales.

Original languageEnglish
Article numberA108
JournalAstronomy and Astrophysics
Volume551
DOIs
Publication statusPublished - 2013

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transit
planets
planet
time measurement
eccentric orbits
sine waves
velocity measurement
radial velocity
light curve
detection
telescopes
timescale
deviation
orbitals
analysis

Keywords

  • Planets and satellites: general
  • Planets and satellites: individual: WASP-12 b
  • Stars: individual: WASP-12

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Multi-site campaign for transit timing variations of WASP-12 b : Possible detection of a long-period signal of planetary origin a long-period signal of planetary origin. / Maciejewski, G.; Dimitrov, D.; Seeliger, M.; Raetz, St; Bukowiecki, L.; Kitze, M.; Errmann, R.; Nowak, G.; Niedzielski, A.; Popov, V.; Marka, C.; Goździewski, K.; Neuhäuser, R.; Ohlert, J.; Hinse, T. C.; Lee, J. W.; Lee, C. U.; Yoon, J. N.; Berndt, A.; Gilbert, H.; Ginski, Ch; Hohle, M. M.; Mugrauer, M.; Röll, T.; Schmidt, T. O B; Tetzlaff, N.; Mancini, L.; Southworth, J.; Dall'Ora, M.; Ciceri, S.; Zambelli, R.; Corfini, G.; Takahashi, H.; Tachihara, K.; Benkő, J.; Sárneczky, K.; Szabo, Gy M.; Varga, T. N.; Vaňko, M.; Joshi, Y. C.; Chen, W. P.

In: Astronomy and Astrophysics, Vol. 551, A108, 2013.

Research output: Contribution to journalArticle

Maciejewski, G, Dimitrov, D, Seeliger, M, Raetz, S, Bukowiecki, L, Kitze, M, Errmann, R, Nowak, G, Niedzielski, A, Popov, V, Marka, C, Goździewski, K, Neuhäuser, R, Ohlert, J, Hinse, TC, Lee, JW, Lee, CU, Yoon, JN, Berndt, A, Gilbert, H, Ginski, C, Hohle, MM, Mugrauer, M, Röll, T, Schmidt, TOB, Tetzlaff, N, Mancini, L, Southworth, J, Dall'Ora, M, Ciceri, S, Zambelli, R, Corfini, G, Takahashi, H, Tachihara, K, Benkő, J, Sárneczky, K, Szabo, GM, Varga, TN, Vaňko, M, Joshi, YC & Chen, WP 2013, 'Multi-site campaign for transit timing variations of WASP-12 b: Possible detection of a long-period signal of planetary origin a long-period signal of planetary origin', Astronomy and Astrophysics, vol. 551, A108. https://doi.org/10.1051/0004-6361/201220739
Maciejewski, G. ; Dimitrov, D. ; Seeliger, M. ; Raetz, St ; Bukowiecki, L. ; Kitze, M. ; Errmann, R. ; Nowak, G. ; Niedzielski, A. ; Popov, V. ; Marka, C. ; Goździewski, K. ; Neuhäuser, R. ; Ohlert, J. ; Hinse, T. C. ; Lee, J. W. ; Lee, C. U. ; Yoon, J. N. ; Berndt, A. ; Gilbert, H. ; Ginski, Ch ; Hohle, M. M. ; Mugrauer, M. ; Röll, T. ; Schmidt, T. O B ; Tetzlaff, N. ; Mancini, L. ; Southworth, J. ; Dall'Ora, M. ; Ciceri, S. ; Zambelli, R. ; Corfini, G. ; Takahashi, H. ; Tachihara, K. ; Benkő, J. ; Sárneczky, K. ; Szabo, Gy M. ; Varga, T. N. ; Vaňko, M. ; Joshi, Y. C. ; Chen, W. P. / Multi-site campaign for transit timing variations of WASP-12 b : Possible detection of a long-period signal of planetary origin a long-period signal of planetary origin. In: Astronomy and Astrophysics. 2013 ; Vol. 551.
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abstract = "Aims. The transiting planet WASP-12 b was identified as a potential target for transit-timing studies because a departure from a linear ephemeris has been reported in the literature. Such deviations could be caused by an additional planet in the system. We attempt to confirm the claimed variations in transit timing and interpret their origin. Methods. We organised a multi-site campaign to observe transits by WASP-12 b in three observing seasons, using 0.5-2.6-metre telescopes. Results. We obtained 61 transit light curves, many of them with sub-millimagnitude precision. The simultaneous analysis of the best-quality datasets allowed us to obtain refined system parameters, which agree with values reported in previous studies. The residuals versus a linear ephemeris reveal a possible periodic signal that may be approximated by a sinusoid with an amplitude of 0.00068 ± 0.00013 d and period of 500 ± 20 orbital periods of WASP-12 b. The joint analysis of timing data and published radial velocity measurements results in a two-planet model that explains observations better than do single-planet scenarios. We hypothesise that WASP-12 b might not be the only planet in the system, and there might be the additional 0.1 M Jup body on a 3.6-d eccentric orbit. A dynamical analysis indicates that the proposed two-planet system is stable on long timescales.",
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author = "G. Maciejewski and D. Dimitrov and M. Seeliger and St Raetz and L. Bukowiecki and M. Kitze and R. Errmann and G. Nowak and A. Niedzielski and V. Popov and C. Marka and K. Goździewski and R. Neuh{\"a}user and J. Ohlert and Hinse, {T. C.} and Lee, {J. W.} and Lee, {C. U.} and Yoon, {J. N.} and A. Berndt and H. Gilbert and Ch Ginski and Hohle, {M. M.} and M. Mugrauer and T. R{\"o}ll and Schmidt, {T. O B} and N. Tetzlaff and L. Mancini and J. Southworth and M. Dall'Ora and S. Ciceri and R. Zambelli and G. Corfini and H. Takahashi and K. Tachihara and J. Benkő and K. S{\'a}rneczky and Szabo, {Gy M.} and Varga, {T. N.} and M. Vaňko and Joshi, {Y. C.} and Chen, {W. P.}",
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T1 - Multi-site campaign for transit timing variations of WASP-12 b

T2 - Possible detection of a long-period signal of planetary origin a long-period signal of planetary origin

AU - Maciejewski, G.

AU - Dimitrov, D.

AU - Seeliger, M.

AU - Raetz, St

AU - Bukowiecki, L.

AU - Kitze, M.

AU - Errmann, R.

AU - Nowak, G.

AU - Niedzielski, A.

AU - Popov, V.

AU - Marka, C.

AU - Goździewski, K.

AU - Neuhäuser, R.

AU - Ohlert, J.

AU - Hinse, T. C.

AU - Lee, J. W.

AU - Lee, C. U.

AU - Yoon, J. N.

AU - Berndt, A.

AU - Gilbert, H.

AU - Ginski, Ch

AU - Hohle, M. M.

AU - Mugrauer, M.

AU - Röll, T.

AU - Schmidt, T. O B

AU - Tetzlaff, N.

AU - Mancini, L.

AU - Southworth, J.

AU - Dall'Ora, M.

AU - Ciceri, S.

AU - Zambelli, R.

AU - Corfini, G.

AU - Takahashi, H.

AU - Tachihara, K.

AU - Benkő, J.

AU - Sárneczky, K.

AU - Szabo, Gy M.

AU - Varga, T. N.

AU - Vaňko, M.

AU - Joshi, Y. C.

AU - Chen, W. P.

PY - 2013

Y1 - 2013

N2 - Aims. The transiting planet WASP-12 b was identified as a potential target for transit-timing studies because a departure from a linear ephemeris has been reported in the literature. Such deviations could be caused by an additional planet in the system. We attempt to confirm the claimed variations in transit timing and interpret their origin. Methods. We organised a multi-site campaign to observe transits by WASP-12 b in three observing seasons, using 0.5-2.6-metre telescopes. Results. We obtained 61 transit light curves, many of them with sub-millimagnitude precision. The simultaneous analysis of the best-quality datasets allowed us to obtain refined system parameters, which agree with values reported in previous studies. The residuals versus a linear ephemeris reveal a possible periodic signal that may be approximated by a sinusoid with an amplitude of 0.00068 ± 0.00013 d and period of 500 ± 20 orbital periods of WASP-12 b. The joint analysis of timing data and published radial velocity measurements results in a two-planet model that explains observations better than do single-planet scenarios. We hypothesise that WASP-12 b might not be the only planet in the system, and there might be the additional 0.1 M Jup body on a 3.6-d eccentric orbit. A dynamical analysis indicates that the proposed two-planet system is stable on long timescales.

AB - Aims. The transiting planet WASP-12 b was identified as a potential target for transit-timing studies because a departure from a linear ephemeris has been reported in the literature. Such deviations could be caused by an additional planet in the system. We attempt to confirm the claimed variations in transit timing and interpret their origin. Methods. We organised a multi-site campaign to observe transits by WASP-12 b in three observing seasons, using 0.5-2.6-metre telescopes. Results. We obtained 61 transit light curves, many of them with sub-millimagnitude precision. The simultaneous analysis of the best-quality datasets allowed us to obtain refined system parameters, which agree with values reported in previous studies. The residuals versus a linear ephemeris reveal a possible periodic signal that may be approximated by a sinusoid with an amplitude of 0.00068 ± 0.00013 d and period of 500 ± 20 orbital periods of WASP-12 b. The joint analysis of timing data and published radial velocity measurements results in a two-planet model that explains observations better than do single-planet scenarios. We hypothesise that WASP-12 b might not be the only planet in the system, and there might be the additional 0.1 M Jup body on a 3.6-d eccentric orbit. A dynamical analysis indicates that the proposed two-planet system is stable on long timescales.

KW - Planets and satellites: general

KW - Planets and satellites: individual: WASP-12 b

KW - Stars: individual: WASP-12

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