WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE

Andrew Collier Cameron; F Bouchy; G Hebrard; P Maxted; D Pollacco; F Pont; I Skillen; B Smalley; R A Street; R G West; D M Wilson; S Aigrain; D J Christian; W I Clarkson; B Enoch; A Evans; A Fitzsimmons; M Fleenor; M Gillon; C A Haswell; L Hebb; C Hellier; S T Hodgkin; Keith Douglas Horne; J Irwin; S R Kane; F P Keenan; B Loeillet; T A Lister; M Mayor; C Moutou; A J Norton; J Osborne; N Parley; D Queloz; R Ryans; A H M J Triaud; S Udry; P J Wheatley

doi:10.1111/j.1365-2966.2006.11350.x

WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE

Andrew Collier Cameron, F Bouchy, G Hebrard, P Maxted, D Pollacco, F Pont, I Skillen, B Smalley, R A Street, R G West, D M Wilson, S Aigrain, D J Christian, W I Clarkson, B Enoch, A Evans, A Fitzsimmons, M Fleenor, M Gillon, C A HaswellL Hebb, C Hellier, S T Hodgkin, Keith Douglas Horne, J Irwin, S R Kane, F P Keenan, B Loeillet, T A Lister, M Mayor, C Moutou, A J Norton, J Osborne, N Parley, D Queloz, R Ryans, A H M J Triaud, S Udry, P J Wheatley

School of Physics and Astronomy

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

Abstract

We have detected low-amplitude radial-velocity variations in two stars, USNO-B1.0 1219-0005465 (GSC 02265-00107 = WASP-1) and USNO-B1.0 0964-0543604 (GSC 00522-01199 = WASP-2). Both stars were identified as being likely host stars of transiting exoplanets in the 2004 SuperWASP wide-field transit survey. Using the newly commissioned radial-velocity spectrograph SOPHIE at the Observatoire de Haute-Provence, we found that both objects exhibit reflex orbital radial-velocity variations with amplitudes characteristic of planetary-mass companions and in-phase with the photometric orbits. Line-bisector studies rule out faint blended binaries as the cause of either the radial-velocity variations or the transits. We perform preliminary spectral analyses of the host stars, which together with their radial-velocity variations and fits to the transit light curves yield estimates of the planetary masses and radii. WASP-1b and WASP-2b have orbital periods of 2.52 and 2.15 d, respectively. Given mass estimates for their F7V and K1V primaries, we derive planet masses 0.80-0.98 and 0.81-0.95 times that of Jupiter, respectively. WASP-1b appears to have an inflated radius of at least 1.33 R-Jup, whereas WASP-2b has a radius in the range 0.65-1.26 R-Jup.

Original language	English
Pages (from-to)	951-957
Number of pages	7
Journal	Monthly Notices of the Royal Astronomical Society
Volume	375
Issue number	3
DOIs	https://doi.org/10.1111/j.1365-2966.2006.11350.x
Publication status	Published - 1 Mar 2007

Keywords

methods : data analysis
techniques : photometric
techniques : radial velocities
planetary systems
EXTRA-SOLAR PLANETS
CORALIE SURVEY
GIANT PLANET
HOT JUPITERS
STAR
ATMOSPHERE
CANDIDATES
VELOCITY
SEARCH
METALLICITY

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10.1111/j.1365-2966.2006.11350.x

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Cameron, A. C., Bouchy, F., Hebrard, G., Maxted, P., Pollacco, D., Pont, F., Skillen, I., Smalley, B., Street, R. A., West, R. G., Wilson, D. M., Aigrain, S., Christian, D. J., Clarkson, W. I., Enoch, B., Evans, A., Fitzsimmons, A., Fleenor, M., Gillon, M., ... Wheatley, P. J. (2007). WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE. Monthly Notices of the Royal Astronomical Society, 375(3), 951-957. https://doi.org/10.1111/j.1365-2966.2006.11350.x

@article{2b813a090aca4dd3a704c8503eb280c6,

title = "WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE",

abstract = "We have detected low-amplitude radial-velocity variations in two stars, USNO-B1.0 1219-0005465 (GSC 02265-00107 = WASP-1) and USNO-B1.0 0964-0543604 (GSC 00522-01199 = WASP-2). Both stars were identified as being likely host stars of transiting exoplanets in the 2004 SuperWASP wide-field transit survey. Using the newly commissioned radial-velocity spectrograph SOPHIE at the Observatoire de Haute-Provence, we found that both objects exhibit reflex orbital radial-velocity variations with amplitudes characteristic of planetary-mass companions and in-phase with the photometric orbits. Line-bisector studies rule out faint blended binaries as the cause of either the radial-velocity variations or the transits. We perform preliminary spectral analyses of the host stars, which together with their radial-velocity variations and fits to the transit light curves yield estimates of the planetary masses and radii. WASP-1b and WASP-2b have orbital periods of 2.52 and 2.15 d, respectively. Given mass estimates for their F7V and K1V primaries, we derive planet masses 0.80-0.98 and 0.81-0.95 times that of Jupiter, respectively. WASP-1b appears to have an inflated radius of at least 1.33 R-Jup, whereas WASP-2b has a radius in the range 0.65-1.26 R-Jup.",

keywords = "methods : data analysis, techniques : photometric, techniques : radial velocities, planetary systems, EXTRA-SOLAR PLANETS, CORALIE SURVEY, GIANT PLANET, HOT JUPITERS, STAR, ATMOSPHERE, CANDIDATES, VELOCITY, SEARCH, METALLICITY",

author = "Cameron, {Andrew Collier} and F Bouchy and G Hebrard and P Maxted and D Pollacco and F Pont and I Skillen and B Smalley and Street, {R A} and West, {R G} and Wilson, {D M} and S Aigrain and Christian, {D J} and Clarkson, {W I} and B Enoch and A Evans and A Fitzsimmons and M Fleenor and M Gillon and Haswell, {C A} and L Hebb and C Hellier and Hodgkin, {S T} and Horne, {Keith Douglas} and J Irwin and Kane, {S R} and Keenan, {F P} and B Loeillet and Lister, {T A} and M Mayor and C Moutou and Norton, {A J} and J Osborne and N Parley and D Queloz and R Ryans and Triaud, {A H M J} and S Udry and Wheatley, {P J}",

note = "Describes the discovery of two transiting gas-giant planets identified in the SuperWASP survey. I led the UK/French/Swiss discovery team, secured the telescope time, selected the targets, obtained the data and wrote the paper.",

year = "2007",

month = mar,

day = "1",

doi = "10.1111/j.1365-2966.2006.11350.x",

language = "English",

volume = "375",

pages = "951--957",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

}

Cameron, AC, Bouchy, F, Hebrard, G, Maxted, P, Pollacco, D, Pont, F, Skillen, I, Smalley, B, Street, RA, West, RG, Wilson, DM, Aigrain, S, Christian, DJ, Clarkson, WI, Enoch, B, Evans, A, Fitzsimmons, A, Fleenor, M, Gillon, M, Haswell, CA, Hebb, L, Hellier, C, Hodgkin, ST, Horne, KD, Irwin, J, Kane, SR, Keenan, FP, Loeillet, B, Lister, TA, Mayor, M, Moutou, C, Norton, AJ, Osborne, J, Parley, N, Queloz, D, Ryans, R, Triaud, AHMJ, Udry, S & Wheatley, PJ 2007, 'WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE', Monthly Notices of the Royal Astronomical Society, vol. 375, no. 3, pp. 951-957. https://doi.org/10.1111/j.1365-2966.2006.11350.x

TY - JOUR

T1 - WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE

AU - Cameron, Andrew Collier

AU - Bouchy, F

AU - Hebrard, G

AU - Maxted, P

AU - Pollacco, D

AU - Pont, F

AU - Skillen, I

AU - Smalley, B

AU - Street, R A

AU - West, R G

AU - Wilson, D M

AU - Aigrain, S

AU - Christian, D J

AU - Clarkson, W I

AU - Enoch, B

AU - Evans, A

AU - Fitzsimmons, A

AU - Fleenor, M

AU - Gillon, M

AU - Haswell, C A

AU - Hebb, L

AU - Hellier, C

AU - Hodgkin, S T

AU - Horne, Keith Douglas

AU - Irwin, J

AU - Kane, S R

AU - Keenan, F P

AU - Loeillet, B

AU - Lister, T A

AU - Mayor, M

AU - Moutou, C

AU - Norton, A J

AU - Osborne, J

AU - Parley, N

AU - Queloz, D

AU - Ryans, R

AU - Triaud, A H M J

AU - Udry, S

AU - Wheatley, P J

N1 - Describes the discovery of two transiting gas-giant planets identified in the SuperWASP survey. I led the UK/French/Swiss discovery team, secured the telescope time, selected the targets, obtained the data and wrote the paper.

PY - 2007/3/1

Y1 - 2007/3/1

N2 - We have detected low-amplitude radial-velocity variations in two stars, USNO-B1.0 1219-0005465 (GSC 02265-00107 = WASP-1) and USNO-B1.0 0964-0543604 (GSC 00522-01199 = WASP-2). Both stars were identified as being likely host stars of transiting exoplanets in the 2004 SuperWASP wide-field transit survey. Using the newly commissioned radial-velocity spectrograph SOPHIE at the Observatoire de Haute-Provence, we found that both objects exhibit reflex orbital radial-velocity variations with amplitudes characteristic of planetary-mass companions and in-phase with the photometric orbits. Line-bisector studies rule out faint blended binaries as the cause of either the radial-velocity variations or the transits. We perform preliminary spectral analyses of the host stars, which together with their radial-velocity variations and fits to the transit light curves yield estimates of the planetary masses and radii. WASP-1b and WASP-2b have orbital periods of 2.52 and 2.15 d, respectively. Given mass estimates for their F7V and K1V primaries, we derive planet masses 0.80-0.98 and 0.81-0.95 times that of Jupiter, respectively. WASP-1b appears to have an inflated radius of at least 1.33 R-Jup, whereas WASP-2b has a radius in the range 0.65-1.26 R-Jup.

AB - We have detected low-amplitude radial-velocity variations in two stars, USNO-B1.0 1219-0005465 (GSC 02265-00107 = WASP-1) and USNO-B1.0 0964-0543604 (GSC 00522-01199 = WASP-2). Both stars were identified as being likely host stars of transiting exoplanets in the 2004 SuperWASP wide-field transit survey. Using the newly commissioned radial-velocity spectrograph SOPHIE at the Observatoire de Haute-Provence, we found that both objects exhibit reflex orbital radial-velocity variations with amplitudes characteristic of planetary-mass companions and in-phase with the photometric orbits. Line-bisector studies rule out faint blended binaries as the cause of either the radial-velocity variations or the transits. We perform preliminary spectral analyses of the host stars, which together with their radial-velocity variations and fits to the transit light curves yield estimates of the planetary masses and radii. WASP-1b and WASP-2b have orbital periods of 2.52 and 2.15 d, respectively. Given mass estimates for their F7V and K1V primaries, we derive planet masses 0.80-0.98 and 0.81-0.95 times that of Jupiter, respectively. WASP-1b appears to have an inflated radius of at least 1.33 R-Jup, whereas WASP-2b has a radius in the range 0.65-1.26 R-Jup.

KW - methods : data analysis

KW - techniques : photometric

KW - techniques : radial velocities

KW - planetary systems

KW - EXTRA-SOLAR PLANETS

KW - CORALIE SURVEY

KW - GIANT PLANET

KW - HOT JUPITERS

KW - STAR

KW - ATMOSPHERE

KW - CANDIDATES

KW - VELOCITY

KW - SEARCH

KW - METALLICITY

UR - http://www.scopus.com/inward/record.url?scp=33846991636&partnerID=8YFLogxK

UR - http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-2966.2006.11350.x

U2 - 10.1111/j.1365-2966.2006.11350.x

DO - 10.1111/j.1365-2966.2006.11350.x

M3 - Article

SN - 0035-8711

VL - 375

SP - 951

EP - 957

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE

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WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE

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