WASP-169, WASP-171, WASP-175 and WASP-182 : three hot Jupiters and one bloated sub-Saturn mass planet discovered by WASP-south
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We present the discovery of four new giant planets from the Wide Angle Search for Planets-South (WASP-South), three hot Jupiters and one bloated sub-Saturn mass planet: WASP-169b, WASP-171b, WASP-175b, and WASP-182b. Besides the discovery photometry from WASP-South we use radial velocity measurements from CORALIE and HARPS and follow-up photometry from EulerCam, TRAPPIST-North and -South, and SPECULOOS. WASP-169b is a low-density Jupiter (M=0.561±0.061MJup, R=1.304+0.150−0.073RJup) orbiting a V = 12.17 F8 subgiant in a 5.611 d orbit. WASP-171b is a typical hot Jupiter (M=1.084±0.094MJup, R=0.98+0.07−0.04RJup, P = 3.82 d) around a V = 13.05 G0 star. We find a linear drift in the radial velocities of WASP-171 spanning 3.5 yr, indicating the possibility of an additional outer planet or stellar companion. WASP-175b is an inflated hot Jupiter (M = 0.99 ± 0.13 MJup, R = 1.208 ± 0.081 RJup, P = 3.07 d) around a V = 12.04 F7 star, which possibly is part of a binary system with a star 7.9 arcsec away. WASP-182b is a bloated sub-Saturn mass planet (M = 0.148 ± 0.011 MJup, R = 0.850 ± 0.030 RJup) around a metal-rich V = 11.98 G5 star ([Fe/H] = 0.27 ± 0.11). With an orbital period of P = 3.377 d, it sits right in the apex of the sub-Jovian desert, bordering the upper and lower edge of the desert in both the mass–period and radius–period plane. WASP-169b, WASP-175b, and WASP-182b are promising targets for atmospheric characterization through transmission spectroscopy, with expected transmission signals of 121, 150, and 264 ppm, respectively.
Nielsen , L D , Bouchy , F , Turner , O D , Anderson , D R , Barkaoui , K , Benkhaldoun , Z , Burdanov , A , Cameron , A C , Delrez , L , Gillon , M , Ducrot , E , Hellier , C , Jehin , E , Lendl , M , Maxted , P F L , Pepe , F , Pollacco , D , Pozuelos , F J , Queloz , D , Ségransan , D , Smalley , B , Triaud , A H M J , Udry , S & West , R G 2019 , ' WASP-169, WASP-171, WASP-175 and WASP-182 : three hot Jupiters and one bloated sub-Saturn mass planet discovered by WASP-south ' , Monthly Notices of the Royal Astronomical Society , vol. 489 , no. 2 , pp. 2478–2487 . https://doi.org/10.1093/mnras/stz2351
Monthly Notices of the Royal Astronomical Society
Copyright © 2019 the Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at https://doi.org/10.1093/mnras/stz2351
DescriptionFunding: European Research Council under the FP/2007-2013 ERC Grant Agreement 336480.
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