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 & 14 others 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

Research output: Contribution to journalArticle

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 ± 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 Teff = 6150 ± 80 K, log g = 4.3 ± 0.1, v sin i = 8.6 ± 0.4 kms-1, M* = 1.16 ± 0.04 M; and R* = 1.33 ± 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 ± 0.06 MJup and a radius of 1.09 ± 0.03 R Jup giving a density, p = 2.1 ± 0.1 J. The high precision of the eccentricity e = 0.0314 ± 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 ± 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.

Original languageEnglish
Article numberA54
JournalAstronomy and Astrophysics
Volume525
Issue number3
DOIs
Publication statusPublished - 1 Dec 2010
Externally publishedYes

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eccentrics
extrasolar planets
transit
planets
planet
orbits
stars
light curve
time measurement
radii
eccentricity
radial velocity
spectral analysis
spectrum analysis
cameras
orbitals
estimates
temperature

Keywords

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

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Barros, S. C. C., Faedi, F., Collier Cameron, A., Lister, T. A., McCormac, J., Pollacco, D., ... Wheatley, P. J. (2010). WASP-38b: A transiting exoplanet in an eccentric, 6.87d period orbit. Astronomy and Astrophysics, 525(3), [A54]. https://doi.org/10.1051/0004-6361/201015800

WASP-38b : A transiting exoplanet in an eccentric, 6.87d period orbit. / 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.; Udry, S.; Bento, J.; Butters, O. W.; Enoch, B.; Haswell, C. A.; Hellier, C.; Keenan, F. P.; Miller, G. R M; Moulds, V.; Norton, A. J.; Parley, N.; Skillen, I.; Watson, C. A.; West, R. G.; Wheatley, P. J.

In: Astronomy and Astrophysics, Vol. 525, No. 3, A54, 01.12.2010.

Research output: Contribution to journalArticle

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 2010, 'WASP-38b: A transiting exoplanet in an eccentric, 6.87d period orbit', Astronomy and Astrophysics, vol. 525, no. 3, A54. https://doi.org/10.1051/0004-6361/201015800
Barros SCC, Faedi F, Collier Cameron A, Lister TA, McCormac J, Pollacco D et al. WASP-38b: A transiting exoplanet in an eccentric, 6.87d period orbit. Astronomy and Astrophysics. 2010 Dec 1;525(3). A54. https://doi.org/10.1051/0004-6361/201015800
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. ; Udry, S. ; Bento, J. ; Butters, O. W. ; Enoch, B. ; Haswell, C. A. ; Hellier, C. ; Keenan, F. P. ; Miller, G. R M ; Moulds, V. ; Norton, A. J. ; Parley, N. ; Skillen, I. ; Watson, C. A. ; West, R. G. ; Wheatley, P. J. / WASP-38b : A transiting exoplanet in an eccentric, 6.87d period orbit. In: Astronomy and Astrophysics. 2010 ; Vol. 525, No. 3.
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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 ± 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 Teff = 6150 ± 80 K, log g = 4.3 ± 0.1, v sin i = 8.6 ± 0.4 kms-1, M* = 1.16 ± 0.04 M; and R* = 1.33 ± 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 ± 0.06 MJup and a radius of 1.09 ± 0.03 R Jup giving a density, p = 2.1 ± 0.1 J. The high precision of the eccentricity e = 0.0314 ± 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 ± 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.",
keywords = "planets and satellites: detection, stars: individual: WASP-38, techniques: photometric, techniques: radial velocities",
author = "Barros, {S. C C} and F. Faedi and {Collier Cameron}, A. and Lister, {T. A.} and J. McCormac and D. Pollacco and Simpson, {E. K.} and B. Smalley and Street, {R. A.} and I. Todd and Triaud, {A. H M J} 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 Butters, {O. W.} and B. Enoch and Haswell, {C. A.} and C. Hellier and Keenan, {F. P.} and Miller, {G. R M} and V. Moulds and Norton, {A. J.} and N. Parley and I. Skillen and Watson, {C. A.} and West, {R. G.} and Wheatley, {P. J.}",
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TY - JOUR

T1 - WASP-38b

T2 - 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 - 2010/12/1

Y1 - 2010/12/1

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 ± 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 Teff = 6150 ± 80 K, log g = 4.3 ± 0.1, v sin i = 8.6 ± 0.4 kms-1, M* = 1.16 ± 0.04 M; and R* = 1.33 ± 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 ± 0.06 MJup and a radius of 1.09 ± 0.03 R Jup giving a density, p = 2.1 ± 0.1 J. The high precision of the eccentricity e = 0.0314 ± 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 ± 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.

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 ± 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 Teff = 6150 ± 80 K, log g = 4.3 ± 0.1, v sin i = 8.6 ± 0.4 kms-1, M* = 1.16 ± 0.04 M; and R* = 1.33 ± 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 ± 0.06 MJup and a radius of 1.09 ± 0.03 R Jup giving a density, p = 2.1 ± 0.1 J. The high precision of the eccentricity e = 0.0314 ± 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 ± 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.

KW - planets and satellites: detection

KW - stars: individual: WASP-38

KW - techniques: photometric

KW - techniques: radial velocities

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U2 - 10.1051/0004-6361/201015800

DO - 10.1051/0004-6361/201015800

M3 - Article

VL - 525

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

IS - 3

M1 - A54

ER -