WASP-38b: a transiting exoplanet in an eccentric, 6.87d period orbit

S.~C.~C. Barros; F. Faedi; A. Collier Cameron; T.~A. Lister; J. McCormac; D. Pollacco; E.~K. Simpson; B. Smalley; R.~A. Street; I. Todd; A.~H.~M.~J. Triaud; I. Boisse; F. Bouchy; G. Hébrard; C. Moutou; F. Pepe; D. Queloz; A. Santerne; D. Segransan; S. Udry; J. Bento; O.~W. Butters; B. Enoch; C.~A. Haswell; C. Hellier; F.~P. Keenan; G.~R.~M. Miller; V. Moulds; A.~J. Norton; N. Parley; I. Skillen; C.~A. Watson; R.~G. West; P.~J. Wheatley

doi:10.1051/0004-6361/201015800

WASP-38b: a transiting exoplanet in an eccentric, 6.87d period orbit

S.~C.~C. Barros, F. Faedi, A. Collier Cameron, T.~A. Lister, J. McCormac, D. Pollacco, E.~K. Simpson, B. Smalley, R.~A. Street, I. Todd, A.~H.~M.~J. Triaud, I. Boisse, F. Bouchy, G. Hébrard, C. Moutou, F. Pepe, D. Queloz, A. Santerne, D. Segransan, S. UdryJ. Bento, O.~W. Butters, B. Enoch, C.~A. Haswell, C. Hellier, F.~P. Keenan, G.~R.~M. Miller, V. Moulds, A.~J. Norton, N. Parley, I. Skillen, C.~A. Watson, R.~G. West, P.~J. Wheatley

Physics and Astronomy

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

36 Citations (Scopus)

Abstract

Aims: We report the discovery of WASP-38b, a long period transiting planet in an eccentric 6.871815 day orbit. The transit epoch is 2 455 335.92050 plusmn 0.00074 (HJD) and the transit duration is 4.663 h.
Methods: WASP-38b's discovery was enabled due to an upgrade to the SuperWASP-North cameras. We performed a spectral analysis of the host star HD 146389/BD+10 2980 that yielded T$_eff$ = 6150 plusmn 80 K, log g = 4.3 plusmn 0.1, v sin i = 8.6 plusmn 0.4 km s$^-1$, M* = 1.16 plusmn 0.04 M$_⊙$ and R* = 1.33 plusmn 0.03 R$_⊙$, consistent with a dwarf of spectral type F8. Assuming a main-sequence mass-radius relation for the star, we fitted simultaneously the radial velocity variations and the transit light curves to estimate the orbital and planetary parameters.
Results: The planet has a mass of 2.69 plusmn 0.06 M$_Jup$ and a radius of 1.09 plusmn 0.03 R$_Jup$ giving a density, $$_p$ = 2.1 plusmn 0.1 $$_J$. The high precision of the eccentricity e = 0.0314 plusmn 0.0044 is due to the relative transit timing from the light curves and the RV shape. The planet equilibrium temperature is estimated at 1292 plusmn 33 K. WASP-38b is the longest period planet found by SuperWASP-North and with a bright host star (V = 9.4 mag), is a good candidate for followup atmospheric studies. Photometry and RV data are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/525/A54

Original language	English
Pages (from-to)	A54
Journal	Astronomy and Astrophysics
Volume	525
DOIs	https://doi.org/10.1051/0004-6361/201015800
Publication status	Published - 1 Jan 2011

Keywords

planets and satellites: detection, stars: individual: WASP-38, techniques: photometric, techniques: radial velocities

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10.1051/0004-6361/201015800

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Barros, S. C. C., Faedi, F., Collier Cameron, A., Lister, T. A., McCormac, J., Pollacco, D., Simpson, E. K., Smalley, B., Street, R. A., Todd, I., Triaud, A. H. M. J., Boisse, I., Bouchy, F., Hébrard, G., Moutou, C., Pepe, F., Queloz, D., Santerne, A., Segransan, D., ... Wheatley, P. J. (2011). WASP-38b: a transiting exoplanet in an eccentric, 6.87d period orbit. Astronomy and Astrophysics, 525, A54. https://doi.org/10.1051/0004-6361/201015800

@article{cb29cd9b56424376ae3294bbc904b44f,

title = "WASP-38b: a transiting exoplanet in an eccentric, 6.87d period orbit",

abstract = " Aims: We report the discovery of WASP-38b, a long period transiting planet in an eccentric 6.871815 day orbit. The transit epoch is 2 455 335.92050 plusmn 0.00074 (HJD) and the transit duration is 4.663 h. Methods: WASP-38b's discovery was enabled due to an upgrade to the SuperWASP-North cameras. We performed a spectral analysis of the host star HD 146389/BD+10 2980 that yielded T$_eff$ = 6150 plusmn 80 K, log g = 4.3 plusmn 0.1, v sin i = 8.6 plusmn 0.4 km s$^-1$, M* = 1.16 plusmn 0.04 M$_⊙$ and R* = 1.33 plusmn 0.03 R$_⊙$, consistent with a dwarf of spectral type F8. Assuming a main-sequence mass-radius relation for the star, we fitted simultaneously the radial velocity variations and the transit light curves to estimate the orbital and planetary parameters. Results: The planet has a mass of 2.69 plusmn 0.06 M$_Jup$ and a radius of 1.09 plusmn 0.03 R$_Jup$ giving a density, $$_p$ = 2.1 plusmn 0.1 $$_J$. The high precision of the eccentricity e = 0.0314 plusmn 0.0044 is due to the relative transit timing from the light curves and the RV shape. The planet equilibrium temperature is estimated at 1292 plusmn 33 K. WASP-38b is the longest period planet found by SuperWASP-North and with a bright host star (V = 9.4 mag), is a good candidate for followup atmospheric studies. Photometry and RV data are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/525/A54 ",

keywords = "planets and satellites: detection, stars: individual: WASP-38, techniques: photometric, techniques: radial velocities",

author = "S.~C.~C. Barros and F. Faedi and {Collier Cameron}, A. and T.~A. Lister and J. McCormac and D. Pollacco and E.~K. Simpson and B. Smalley and R.~A. Street and I. Todd and A.~H.~M.~J. Triaud and I. Boisse and F. Bouchy and G. H{\'e}brard and C. Moutou and F. Pepe and D. Queloz and A. Santerne and D. Segransan and S. Udry and J. Bento and O.~W. Butters and B. Enoch and C.~A. Haswell and C. Hellier and F.~P. Keenan and G.~R.~M. Miller and V. Moulds and A.~J. Norton and N. Parley and I. Skillen and C.~A. Watson and R.~G. West and P.~J. Wheatley",

year = "2011",

month = jan,

day = "1",

doi = "10.1051/0004-6361/201015800",

language = "English",

volume = "525",

pages = "A54",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Barros, SCC, Faedi, F, Collier Cameron, A, Lister, TA, McCormac, J, Pollacco, D, Simpson, EK, Smalley, B, Street, RA, Todd, I, Triaud, AHMJ, Boisse, I, Bouchy, F, Hébrard, G, Moutou, C, Pepe, F, Queloz, D, Santerne, A, Segransan, D, Udry, S, Bento, J, Butters, OW, Enoch, B, Haswell, CA, Hellier, C, Keenan, FP, Miller, GRM, Moulds, V, Norton, AJ, Parley, N, Skillen, I, Watson, CA, West, RG & Wheatley, PJ 2011, 'WASP-38b: a transiting exoplanet in an eccentric, 6.87d period orbit', Astronomy and Astrophysics, vol. 525, pp. A54. https://doi.org/10.1051/0004-6361/201015800

TY - JOUR

T1 - WASP-38b: a transiting exoplanet in an eccentric, 6.87d period orbit

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

AU - Faedi, F.

AU - Collier Cameron, A.

AU - Lister, T.~A.

AU - McCormac, J.

AU - Pollacco, D.

AU - Simpson, E.~K.

AU - Smalley, B.

AU - Street, R.~A.

AU - Todd, I.

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

AU - Boisse, I.

AU - Bouchy, F.

AU - Hébrard, G.

AU - Moutou, C.

AU - Pepe, F.

AU - Queloz, D.

AU - Santerne, A.

AU - Segransan, D.

AU - Udry, S.

AU - Bento, J.

AU - Butters, O.~W.

AU - Enoch, B.

AU - Haswell, C.~A.

AU - Hellier, C.

AU - Keenan, F.~P.

AU - Miller, G.~R.~M.

AU - Moulds, V.

AU - Norton, A.~J.

AU - Parley, N.

AU - Skillen, I.

AU - Watson, C.~A.

AU - West, R.~G.

AU - Wheatley, P.~J.

PY - 2011/1/1

Y1 - 2011/1/1

N2 - Aims: We report the discovery of WASP-38b, a long period transiting planet in an eccentric 6.871815 day orbit. The transit epoch is 2 455 335.92050 plusmn 0.00074 (HJD) and the transit duration is 4.663 h. Methods: WASP-38b's discovery was enabled due to an upgrade to the SuperWASP-North cameras. We performed a spectral analysis of the host star HD 146389/BD+10 2980 that yielded T$_eff$ = 6150 plusmn 80 K, log g = 4.3 plusmn 0.1, v sin i = 8.6 plusmn 0.4 km s$^-1$, M* = 1.16 plusmn 0.04 M$_⊙$ and R* = 1.33 plusmn 0.03 R$_⊙$, consistent with a dwarf of spectral type F8. Assuming a main-sequence mass-radius relation for the star, we fitted simultaneously the radial velocity variations and the transit light curves to estimate the orbital and planetary parameters. Results: The planet has a mass of 2.69 plusmn 0.06 M$_Jup$ and a radius of 1.09 plusmn 0.03 R$_Jup$ giving a density, $$_p$ = 2.1 plusmn 0.1 $$_J$. The high precision of the eccentricity e = 0.0314 plusmn 0.0044 is due to the relative transit timing from the light curves and the RV shape. The planet equilibrium temperature is estimated at 1292 plusmn 33 K. WASP-38b is the longest period planet found by SuperWASP-North and with a bright host star (V = 9.4 mag), is a good candidate for followup atmospheric studies. Photometry and RV data are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/525/A54

AB - Aims: We report the discovery of WASP-38b, a long period transiting planet in an eccentric 6.871815 day orbit. The transit epoch is 2 455 335.92050 plusmn 0.00074 (HJD) and the transit duration is 4.663 h. Methods: WASP-38b's discovery was enabled due to an upgrade to the SuperWASP-North cameras. We performed a spectral analysis of the host star HD 146389/BD+10 2980 that yielded T$_eff$ = 6150 plusmn 80 K, log g = 4.3 plusmn 0.1, v sin i = 8.6 plusmn 0.4 km s$^-1$, M* = 1.16 plusmn 0.04 M$_⊙$ and R* = 1.33 plusmn 0.03 R$_⊙$, consistent with a dwarf of spectral type F8. Assuming a main-sequence mass-radius relation for the star, we fitted simultaneously the radial velocity variations and the transit light curves to estimate the orbital and planetary parameters. Results: The planet has a mass of 2.69 plusmn 0.06 M$_Jup$ and a radius of 1.09 plusmn 0.03 R$_Jup$ giving a density, $$_p$ = 2.1 plusmn 0.1 $$_J$. The high precision of the eccentricity e = 0.0314 plusmn 0.0044 is due to the relative transit timing from the light curves and the RV shape. The planet equilibrium temperature is estimated at 1292 plusmn 33 K. WASP-38b is the longest period planet found by SuperWASP-North and with a bright host star (V = 9.4 mag), is a good candidate for followup atmospheric studies. Photometry and RV data are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/525/A54

KW - planets and satellites: detection, stars: individual: WASP-38, techniques: photometric, techniques: radial velocities

U2 - 10.1051/0004-6361/201015800

DO - 10.1051/0004-6361/201015800

M3 - Article

SN - 0004-6361

VL - 525

SP - A54

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

ER -

WASP-38b: a transiting exoplanet in an eccentric, 6.87d period orbit

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Keywords

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