Hats-18B: An extreme short-period massive transiting planet spinning up its star

K. Penev; J. D. Hartman; G. Bakos; S. Ciceri; R. Brahm; D. Bayliss; J. Bento; A. Jordán; Z. Csubry; W. Bhatti; M. De Val-Borro; N. Espinoza; G. Zhou; L. Mancini; M. Rabus; V. Suc; T. Henning; B. Schmidt; R. W. Noyes; J. Lázár; I. Papp; P. Sári

doi:10.3847/0004-6256/152/5/127

Hats-18B: An extreme short-period massive transiting planet spinning up its star

K. Penev
, J. D. Hartman
, G. Bakos
, S. Ciceri
, R. Brahm
, D. Bayliss
, J. Bento
, A. Jordán
, Z. Csubry
, W. Bhatti
, M. De Val-Borro
, N. Espinoza
, G. Zhou
, L. Mancini
, M. Rabus
, V. Suc
, T. Henning
, B. Schmidt
, R. W. Noyes
, J. Lázár

I. Papp, P. Sári

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

39 Scopus citations

Abstract

We report the discovery by the HATSouth network of HATS-18b: a 1.980 ± 0.077 MJ, - 1.337_-0.049 ^+0.102 R_J planet in a 0.8378 day orbit, around a solar analog star (mass 1.037 ± 0.047 M_⊙ and radius - 1.020_-0.031 ^+0.057 R_⊙) with V=14.067±0.040 mag. The high planet mass, combined with its short orbital period, implies strong tidal coupling between the planetary orbit and the star. In fact, given its inferred age, HATS-18 shows evidence of significant tidal spin up, which together with WASP-19 (a very similar system) allows us to constrain the tidal quality factor for Sun-like stars to be in the range of 6.5≲log₁₀(Q^∗/k₂)≲7 even after allowing for extremely pessimistic model uncertainties. In addition, the HATS-18 system is among the best systems (and often the best system) for testing a multitude of star-planet interactions, be they gravitational, magnetic, or radiative, as well as planet formation and migration theories.

Original language	English
Article number	127
Journal	Astronomical Journal
Volume	152
Issue number	5
DOIs	https://doi.org/10.3847/0004-6256/152/5/127
State	Published - Nov 2016
Externally published	Yes

Keywords

planetary systems
planets and satellites: detection
planets and satellites: gaseous planets
stars: individual (HATS-18)
stars: rotation
techniques: photometric

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10.3847/0004-6256/152/5/127

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Penev, K., Hartman, J. D., Bakos, G., Ciceri, S., Brahm, R., Bayliss, D., Bento, J., Jordán, A., Csubry, Z., Bhatti, W., De Val-Borro, M., Espinoza, N., Zhou, G., Mancini, L., Rabus, M., Suc, V., Henning, T., Schmidt, B., Noyes, R. W., ... Sári, P. (2016). Hats-18B: An extreme short-period massive transiting planet spinning up its star. Astronomical Journal, 152(5), Article 127. https://doi.org/10.3847/0004-6256/152/5/127

@article{538424aa7d9943d9a0c7ddf248109c22,

title = "Hats-18B: An extreme short-period massive transiting planet spinning up its star",

abstract = "We report the discovery by the HATSouth network of HATS-18b: a 1.980 ± 0.077 MJ, - 1.337-0.049 +0.102 RJ planet in a 0.8378 day orbit, around a solar analog star (mass 1.037 ± 0.047 M⊙ and radius - 1.020-0.031 +0.057 R⊙) with V=14.067±0.040 mag. The high planet mass, combined with its short orbital period, implies strong tidal coupling between the planetary orbit and the star. In fact, given its inferred age, HATS-18 shows evidence of significant tidal spin up, which together with WASP-19 (a very similar system) allows us to constrain the tidal quality factor for Sun-like stars to be in the range of 6.5≲log10(Q∗/k2)≲7 even after allowing for extremely pessimistic model uncertainties. In addition, the HATS-18 system is among the best systems (and often the best system) for testing a multitude of star-planet interactions, be they gravitational, magnetic, or radiative, as well as planet formation and migration theories.",

keywords = "planetary systems, planets and satellites: detection, planets and satellites: gaseous planets, stars: individual (HATS-18), stars: rotation, techniques: photometric",

author = "K. Penev and Hartman, \{J. D.\} and G. Bakos and S. Ciceri and R. Brahm and D. Bayliss and J. Bento and A. Jord{\'a}n and Z. Csubry and W. Bhatti and \{De Val-Borro\}, M. and N. Espinoza and G. Zhou and L. Mancini and M. Rabus and V. Suc and T. Henning and B. Schmidt and Noyes, \{R. W.\} and J. L{\'a}z{\'a}r and I. Papp and P. S{\'a}ri",

year = "2016",

month = nov,

doi = "10.3847/0004-6256/152/5/127",

language = "English",

volume = "152",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

number = "5",

}

Penev, K, Hartman, JD, Bakos, G, Ciceri, S, Brahm, R, Bayliss, D, Bento, J, Jordán, A, Csubry, Z, Bhatti, W, De Val-Borro, M, Espinoza, N, Zhou, G, Mancini, L, Rabus, M, Suc, V, Henning, T, Schmidt, B, Noyes, RW, Lázár, J, Papp, I & Sári, P 2016, 'Hats-18B: An extreme short-period massive transiting planet spinning up its star', Astronomical Journal, vol. 152, no. 5, 127. https://doi.org/10.3847/0004-6256/152/5/127

TY - JOUR

T1 - Hats-18B

T2 - An extreme short-period massive transiting planet spinning up its star

AU - Penev, K.

AU - Hartman, J. D.

AU - Bakos, G.

AU - Ciceri, S.

AU - Brahm, R.

AU - Bayliss, D.

AU - Bento, J.

AU - Jordán, A.

AU - Csubry, Z.

AU - Bhatti, W.

AU - De Val-Borro, M.

AU - Espinoza, N.

AU - Zhou, G.

AU - Mancini, L.

AU - Rabus, M.

AU - Suc, V.

AU - Henning, T.

AU - Schmidt, B.

AU - Noyes, R. W.

AU - Lázár, J.

AU - Papp, I.

AU - Sári, P.

PY - 2016/11

Y1 - 2016/11

N2 - We report the discovery by the HATSouth network of HATS-18b: a 1.980 ± 0.077 MJ, - 1.337-0.049 +0.102 RJ planet in a 0.8378 day orbit, around a solar analog star (mass 1.037 ± 0.047 M⊙ and radius - 1.020-0.031 +0.057 R⊙) with V=14.067±0.040 mag. The high planet mass, combined with its short orbital period, implies strong tidal coupling between the planetary orbit and the star. In fact, given its inferred age, HATS-18 shows evidence of significant tidal spin up, which together with WASP-19 (a very similar system) allows us to constrain the tidal quality factor for Sun-like stars to be in the range of 6.5≲log10(Q∗/k2)≲7 even after allowing for extremely pessimistic model uncertainties. In addition, the HATS-18 system is among the best systems (and often the best system) for testing a multitude of star-planet interactions, be they gravitational, magnetic, or radiative, as well as planet formation and migration theories.

AB - We report the discovery by the HATSouth network of HATS-18b: a 1.980 ± 0.077 MJ, - 1.337-0.049 +0.102 RJ planet in a 0.8378 day orbit, around a solar analog star (mass 1.037 ± 0.047 M⊙ and radius - 1.020-0.031 +0.057 R⊙) with V=14.067±0.040 mag. The high planet mass, combined with its short orbital period, implies strong tidal coupling between the planetary orbit and the star. In fact, given its inferred age, HATS-18 shows evidence of significant tidal spin up, which together with WASP-19 (a very similar system) allows us to constrain the tidal quality factor for Sun-like stars to be in the range of 6.5≲log10(Q∗/k2)≲7 even after allowing for extremely pessimistic model uncertainties. In addition, the HATS-18 system is among the best systems (and often the best system) for testing a multitude of star-planet interactions, be they gravitational, magnetic, or radiative, as well as planet formation and migration theories.

KW - planetary systems

KW - planets and satellites: detection

KW - planets and satellites: gaseous planets

KW - stars: individual (HATS-18)

KW - stars: rotation

KW - techniques: photometric

UR - https://www.scopus.com/pages/publications/84994545699

U2 - 10.3847/0004-6256/152/5/127

DO - 10.3847/0004-6256/152/5/127

M3 - Article

AN - SCOPUS:84994545699

SN - 0004-6256

VL - 152

JO - Astronomical Journal

JF - Astronomical Journal

IS - 5

M1 - 127

ER -

Hats-18B: An extreme short-period massive transiting planet spinning up its star

Abstract

Keywords

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