From dense hot Jupiter to low-density Neptune: The discovery of WASP-127b, WASP-136b, and WASP-138b

K.~W.~F. Lam; F. Faedi; D.~J.~A. Brown; D.~R. Anderson; L. Delrez; M. Gillon; G. Hébrard; M. Lendl; L. Mancini; J. Southworth; B. Smalley; A.~H.~M. Triaud; O.~D. Turner; K.~L. Hay; D.~J. Armstrong; S.~C.~C. Barros; A.~S. Bonomo; F. Bouchy; P. Boumis; A. Collier Cameron; A.~P. Doyle; C. Hellier; T. Henning; E. Jehin; G. King; J. Kirk; T. Louden; P.~F.~L. Maxted; J.~J. McCormac; H.~P. Osborn; E. Palle; F. Pepe; D. Pollacco; J. Prieto-Arranz; D. Queloz; J. Rey; D. Ségransan; S. Udry; S. Walker; R.~G. West; P.~J. Wheatley

doi:10.1051/0004-6361/201629403

From dense hot Jupiter to low-density Neptune: The discovery of WASP-127b, WASP-136b, and WASP-138b

K.~W.~F. Lam, F. Faedi, D.~J.~A. Brown, D.~R. Anderson, L. Delrez, M. Gillon, G. Hébrard, M. Lendl, L. Mancini, J. Southworth, B. Smalley, A.~H.~M. Triaud, O.~D. Turner, K.~L. Hay, D.~J. Armstrong, S.~C.~C. Barros, A.~S. Bonomo, F. Bouchy, P. Boumis, A. Collier CameronA.~P. Doyle, C. Hellier, T. Henning, E. Jehin, G. King, J. Kirk, T. Louden, P.~F.~L. Maxted, J.~J. McCormac, H.~P. Osborn, E. Palle, F. Pepe, D. Pollacco, J. Prieto-Arranz, D. Queloz, J. Rey, D. Ségransan, S. Udry, S. Walker, R.~G. West, P.~J. Wheatley

Physics and Astronomy

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

20 Citations (Scopus)

Abstract

We report three newly discovered exoplanets from the SuperWASP survey. WASP-127b is a heavily inflated super-Neptune of mass 0.18plusmn0.02 M$_J$ and radius 1.37plusmn0.04 R$_J$. This is one of the least massive planets discovered by the WASP project. It orbits a bright host star (V$_mag$ = 10.16) of spectral type G5 with a period of 4.17 days. WASP-127b is a low-density planet that has an extended atmosphere with a scale height of 2500 plusmn 400 km, making it an ideal candidate for transmission spectroscopy. WASP-136b and WASP-138b are both hot Jupiters with mass and radii of 1.51 plusmn 0.08 M$_J$ and 1.38 plusmn 0.16 R$_J$, and 1.22 plusmn 0.08 M$_J$ and 1.09 plusmn 0.05 R$_J$, respectively. WASP-136b is in a 5.22-day orbit around an F9 subgiant star with a mass of 1.41 plusmn 0.07 M$_⊙$ and a radius of 2.21 plusmn 0.22 R$_⊙$. The discovery of WASP-136b could help constrain the characteristics of the giant planet population around evolved stars. WASP-138b orbits an F7 star with a period of 3.63 days. Its radius agrees with theoretical values from standard models, suggesting the presence of a heavy element core with a mass of 10 M$_⊕$. The discovery of these new planets helps in exploring the diverse compositional range of short-period planets, and will aid our understanding of the physical characteristics of both gas giants and low-density planets. Radial velocity and photometry tables are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/599/A3

Original language	English
Pages (from-to)	A3
Journal	Astronomy and Astrophysics
Volume	599
Early online date	20 Feb 2017
DOIs	https://doi.org/10.1051/0004-6361/201629403
Publication status	Published - 1 Mar 2017

Keywords

stars: individual: WASP-138
planetary systems
stars: individual: WASP-127
techniques: radial velocities
techniques: photometric
stars: individual: WASP-136

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Lam, K. W. F., Faedi, F., Brown, D. J. A., Anderson, D. R., Delrez, L., Gillon, M., Hébrard, G., Lendl, M., Mancini, L., Southworth, J., Smalley, B., Triaud, A. H. M., Turner, O. D., Hay, K. L., Armstrong, D. J., Barros, S. C. C., Bonomo, A. S., Bouchy, F., Boumis, P., ... Wheatley, P. J. (2017). From dense hot Jupiter to low-density Neptune: The discovery of WASP-127b, WASP-136b, and WASP-138b. Astronomy and Astrophysics, 599, A3. Advance online publication. https://doi.org/10.1051/0004-6361/201629403

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title = "From dense hot Jupiter to low-density Neptune: The discovery of WASP-127b, WASP-136b, and WASP-138b",

abstract = "We report three newly discovered exoplanets from the SuperWASP survey. WASP-127b is a heavily inflated super-Neptune of mass 0.18plusmn0.02 M$_J$ and radius 1.37plusmn0.04 R$_J$. This is one of the least massive planets discovered by the WASP project. It orbits a bright host star (V$_mag$ = 10.16) of spectral type G5 with a period of 4.17 days. WASP-127b is a low-density planet that has an extended atmosphere with a scale height of 2500 plusmn 400 km, making it an ideal candidate for transmission spectroscopy. WASP-136b and WASP-138b are both hot Jupiters with mass and radii of 1.51 plusmn 0.08 M$_J$ and 1.38 plusmn 0.16 R$_J$, and 1.22 plusmn 0.08 M$_J$ and 1.09 plusmn 0.05 R$_J$, respectively. WASP-136b is in a 5.22-day orbit around an F9 subgiant star with a mass of 1.41 plusmn 0.07 M$_⊙$ and a radius of 2.21 plusmn 0.22 R$_⊙$. The discovery of WASP-136b could help constrain the characteristics of the giant planet population around evolved stars. WASP-138b orbits an F7 star with a period of 3.63 days. Its radius agrees with theoretical values from standard models, suggesting the presence of a heavy element core with a mass of 10 M$_⊕$. The discovery of these new planets helps in exploring the diverse compositional range of short-period planets, and will aid our understanding of the physical characteristics of both gas giants and low-density planets. Radial velocity and photometry tables are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/599/A3 ",

keywords = "stars: individual: WASP-138, planetary systems, stars: individual: WASP-127, techniques: radial velocities, techniques: photometric, stars: individual: WASP-136",

author = "K.~W.~F. Lam and F. Faedi and D.~J.~A. Brown and D.~R. Anderson and L. Delrez and M. Gillon and G. H{\'e}brard and M. Lendl and L. Mancini and J. Southworth and B. Smalley and A.~H.~M. Triaud and O.~D. Turner and K.~L. Hay and D.~J. Armstrong and S.~C.~C. Barros and A.~S. Bonomo and F. Bouchy and P. Boumis and {Collier Cameron}, A. and A.~P. Doyle and C. Hellier and T. Henning and E. Jehin and G. King and J. Kirk and T. Louden and P.~F.~L. Maxted and J.~J. McCormac and H.~P. Osborn and E. Palle and F. Pepe and D. Pollacco and J. Prieto-Arranz and D. Queloz and J. Rey and D. S{\'e}gransan and S. Udry and S. Walker and R.~G. West and P.~J. Wheatley",

year = "2017",

month = mar,

day = "1",

doi = "10.1051/0004-6361/201629403",

language = "English",

volume = "599",

pages = "A3",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Lam, KWF, Faedi, F, Brown, DJA, Anderson, DR, Delrez, L, Gillon, M, Hébrard, G, Lendl, M, Mancini, L, Southworth, J, Smalley, B, Triaud, AHM, Turner, OD, Hay, KL, Armstrong, DJ, Barros, SCC, Bonomo, AS, Bouchy, F, Boumis, P, Collier Cameron, A, Doyle, AP, Hellier, C, Henning, T, Jehin, E, King, G, Kirk, J, Louden, T, Maxted, PFL, McCormac, JJ, Osborn, HP, Palle, E, Pepe, F, Pollacco, D, Prieto-Arranz, J, Queloz, D, Rey, J, Ségransan, D, Udry, S, Walker, S, West, RG & Wheatley, PJ 2017, 'From dense hot Jupiter to low-density Neptune: The discovery of WASP-127b, WASP-136b, and WASP-138b', Astronomy and Astrophysics, vol. 599, pp. A3. https://doi.org/10.1051/0004-6361/201629403

TY - JOUR

T1 - From dense hot Jupiter to low-density Neptune: The discovery of WASP-127b, WASP-136b, and WASP-138b

AU - Lam, K.~W.~F.

AU - Faedi, F.

AU - Brown, D.~J.~A.

AU - Anderson, D.~R.

AU - Delrez, L.

AU - Gillon, M.

AU - Hébrard, G.

AU - Lendl, M.

AU - Mancini, L.

AU - Southworth, J.

AU - Smalley, B.

AU - Triaud, A.~H.~M.

AU - Turner, O.~D.

AU - Hay, K.~L.

AU - Armstrong, D.~J.

AU - Barros, S.~C.~C.

AU - Bonomo, A.~S.

AU - Bouchy, F.

AU - Boumis, P.

AU - Collier Cameron, A.

AU - Doyle, A.~P.

AU - Hellier, C.

AU - Henning, T.

AU - Jehin, E.

AU - King, G.

AU - Kirk, J.

AU - Louden, T.

AU - Maxted, P.~F.~L.

AU - McCormac, J.~J.

AU - Osborn, H.~P.

AU - Palle, E.

AU - Pepe, F.

AU - Pollacco, D.

AU - Prieto-Arranz, J.

AU - Queloz, D.

AU - Rey, J.

AU - Ségransan, D.

AU - Udry, S.

AU - Walker, S.

AU - West, R.~G.

AU - Wheatley, P.~J.

PY - 2017/3/1

Y1 - 2017/3/1

N2 - We report three newly discovered exoplanets from the SuperWASP survey. WASP-127b is a heavily inflated super-Neptune of mass 0.18plusmn0.02 M$_J$ and radius 1.37plusmn0.04 R$_J$. This is one of the least massive planets discovered by the WASP project. It orbits a bright host star (V$_mag$ = 10.16) of spectral type G5 with a period of 4.17 days. WASP-127b is a low-density planet that has an extended atmosphere with a scale height of 2500 plusmn 400 km, making it an ideal candidate for transmission spectroscopy. WASP-136b and WASP-138b are both hot Jupiters with mass and radii of 1.51 plusmn 0.08 M$_J$ and 1.38 plusmn 0.16 R$_J$, and 1.22 plusmn 0.08 M$_J$ and 1.09 plusmn 0.05 R$_J$, respectively. WASP-136b is in a 5.22-day orbit around an F9 subgiant star with a mass of 1.41 plusmn 0.07 M$_⊙$ and a radius of 2.21 plusmn 0.22 R$_⊙$. The discovery of WASP-136b could help constrain the characteristics of the giant planet population around evolved stars. WASP-138b orbits an F7 star with a period of 3.63 days. Its radius agrees with theoretical values from standard models, suggesting the presence of a heavy element core with a mass of 10 M$_⊕$. The discovery of these new planets helps in exploring the diverse compositional range of short-period planets, and will aid our understanding of the physical characteristics of both gas giants and low-density planets. Radial velocity and photometry tables are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/599/A3

AB - We report three newly discovered exoplanets from the SuperWASP survey. WASP-127b is a heavily inflated super-Neptune of mass 0.18plusmn0.02 M$_J$ and radius 1.37plusmn0.04 R$_J$. This is one of the least massive planets discovered by the WASP project. It orbits a bright host star (V$_mag$ = 10.16) of spectral type G5 with a period of 4.17 days. WASP-127b is a low-density planet that has an extended atmosphere with a scale height of 2500 plusmn 400 km, making it an ideal candidate for transmission spectroscopy. WASP-136b and WASP-138b are both hot Jupiters with mass and radii of 1.51 plusmn 0.08 M$_J$ and 1.38 plusmn 0.16 R$_J$, and 1.22 plusmn 0.08 M$_J$ and 1.09 plusmn 0.05 R$_J$, respectively. WASP-136b is in a 5.22-day orbit around an F9 subgiant star with a mass of 1.41 plusmn 0.07 M$_⊙$ and a radius of 2.21 plusmn 0.22 R$_⊙$. The discovery of WASP-136b could help constrain the characteristics of the giant planet population around evolved stars. WASP-138b orbits an F7 star with a period of 3.63 days. Its radius agrees with theoretical values from standard models, suggesting the presence of a heavy element core with a mass of 10 M$_⊕$. The discovery of these new planets helps in exploring the diverse compositional range of short-period planets, and will aid our understanding of the physical characteristics of both gas giants and low-density planets. Radial velocity and photometry tables are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/599/A3

KW - stars: individual: WASP-138

KW - planetary systems

KW - stars: individual: WASP-127

KW - techniques: radial velocities

KW - techniques: photometric

KW - stars: individual: WASP-136

U2 - 10.1051/0004-6361/201629403

DO - 10.1051/0004-6361/201629403

M3 - Article

SN - 0004-6361

VL - 599

SP - A3

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

ER -

From dense hot Jupiter to low-density Neptune: The discovery of WASP-127b, WASP-136b, and WASP-138b

Abstract

Keywords

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