SuperWASP Results

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Re: SuperWASP Results

Post by Edasich on 15th April 2016, 4:06 am

WASP-142 b was the one said to have been discovered by a student.
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Re: SuperWASP Results

Post by Sirius_Alpha on 4th July 2016, 8:52 pm

WASP-92b, WASP-93b and WASP-118b: Three new transiting close-in giant planets
http://arxiv.org/abs/1607.00774

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Re: SuperWASP Results

Post by Shellface on 5th July 2016, 11:33 am

In the K2 proposal including WASP-118, WASP-107 is also described:

WASP-107b is a warm Saturn in a 5.7-day orbit around a K6 starů
With a mass 2.2 times that of Neptune and 0.40 times that of Saturn, but a radius 0.94 times that of Jupiter, WASP-107b is in the transition region between ice giants and gas giants. This sets a lower limit on the planetary mass above which large gaseous envelopes can be accreted and retained by proto-planets on their way to becoming gas giants. WASP-107b will prove useful to planetary formation theory, which faces the challenge of explaining how ice giants avoid the runaway gas accretion that otherwise would have turned them into gas giants.

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Re: SuperWASP Results

Post by Sirius_Alpha on 10th July 2016, 8:41 pm

WASP-113 and WASP-114
http://arxiv.org/abs/1607.02341

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Re: SuperWASP Results

Post by Edasich on 11th July 2016, 3:43 am

A parade of SuperWASP planets lately! Very Happy

Yet I don't get why EPE is refusing to update the exoplanet count lately: there are nearly or more than 85-90 confirmed exoplanets missing from Kepler, K2, KELT, HAT-South, WASP, Doppler, imaging and microlensing method as well - the most recently announced included too!
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Re: SuperWASP Results

Post by Sirius_Alpha on 27th July 2016, 2:28 am

From Dense Hot Jupiter to Low Density Neptune: The Discovery of WASP-127b, WASP-136b and WASP-138b
http://arxiv.org/abs/1607.07859

We report three newly discovered exoplanets from the SuperWASP survey. WASP-127b is a heavily inflated super-Neptune of mass 0.18Mj and radius 1.35Rj. This is one of the least massive planets discovered by the WASP project. It orbits a bright host star (V = 10.16) of spectral type G5 with a period of 4.17 days.WASP-127b is a low density planet which has an extended atmosphere with a scale height of 2500+/-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 Mj and 1.38 Rj, and 1.22 Mj and 1.09 Rj, respectively. WASP-136b is in a 5.22-day orbit around an F9 subgiant star with a mass of 1.41 Msun and a radius of 2.21 Rsun. The discovery of WASP-136b could help constraint 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 Mearth. 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.

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Re: SuperWASP Results

Post by Sirius_Alpha on 15th August 2016, 8:30 pm

WASP-86b and WASP-102b: super-dense versus bloated planets
http://arxiv.org/abs/1608.04225

WASP-86 b is excessively dense, with a composition of > 80% heavy elements.

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Re: SuperWASP Results

Post by Sirius_Alpha on 13th December 2016, 9:54 pm

Peculiar architectures for the WASP-53 and WASP-81 planet-hosting systems
https://arxiv.org/abs/1612.04166

We report the detection of two new systems containing transiting planets. Both were identified by WASP as worthy transiting planet candidates. Radial-velocity observations quickly verified that the photometric signals were indeed produced by two transiting hot Jupiters. Our observations also show the presence of additional Doppler signals. In addition to short-period hot Jupiters, we find that the WASP-53 and WASP-81 systems also host brown dwarfs, on fairly eccentric orbits with semi-major axes of a few astronomical units. WASP-53c is over 16 MJupsinic and WASP-81c is 57 MJupsinic. The presence of these tight, massive companions restricts theories of how the inner planets were assembled. We propose two alternative interpretations: a formation of the hot Jupiters within the snow line, or the late dynamical arrival of the brown dwarfs after disc-dispersal.
We also attempted to measure the Rossiter--McLaughlin effect for both hot Jupiters. In the case of WASP-81b we fail to detect a signal. For WASP-53b we find that the planet is aligned with respect to the stellar spin axis. In addition we explore the prospect of transit timing variations, and of using Gaia's astrometry to measure the true masses of both brown dwarfs and also their relative inclination with respect to the inner transiting hot Jupiters.

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Re: SuperWASP Results

Post by Edasich on 14th December 2016, 6:12 am

WASP-53 b and WASP-81 b are finally announced along with additional companions. Great update. Very Happy
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Re: SuperWASP Results

Post by Sirius_Alpha on 15th January 2017, 9:40 pm

The discoveries of WASP-91b, WASP-105b and WASP-107b: two warm Jupiters and a planet in the transition region between ice giants and gas giants
https://arxiv.org/abs/1701.03776

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Re: SuperWASP Results

Post by Sirius_Alpha on 25th April 2017, 8:25 pm

WASP-167b/KELT-13b: Joint discovery of a hot Jupiter transiting a rapidly-rotating F1V star
https://arxiv.org/abs/1704.07771

We report the joint WASP/KELT discovery of WASP-167b/KELT-13b, a transiting hot Jupiter with a 2.02-d orbit around a V = 10.5, F1V star with [Fe/H] = 0.1 ▒ 0.1. The 1.5 RJup planet was confirmed by Doppler tomography of the stellar line profiles during transit. We place a limit of < 8 MJup on its mass. The planet is in a retrograde orbit with a sky-projected spin-orbit angle of λ=−165∘▒5∘. This is in agreement with the known tendency for orbits around hotter stars to be more likely to be misaligned. WASP-167/KELT-13 is one of the few systems where the stellar rotation period is less than the planetary orbital period. We find evidence of non-radial stellar pulsations in the host star, making it a δ-Scuti or γ-Dor variable. The similarity to WASP-33, a previously known hot-Jupiter host with pulsations, adds to the suggestion that close-in planets might be able to excite stellar pulsations.

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Re: SuperWASP Results

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