TESS Reveals HD 118203 b to be a Transiting Planet

Pepper, Joshua; Kane, Stephen R.; Rodriguez, Joseph E.; Hinkel, Natalie R.; Eastman, Jason D.; Daylan, Tansu; Močnik, Teo; Dalba, Paul A.; Gaudi, B. Scott; Fetherolf, Tara; Stassun, Keivan G.; Campante, Tiago L.; Vanderburg, Andrew; Huber, Daniel; Bossini, D.; Crossfield, Ian J. M.; Howell, Steve B.; Stephens, Andrew W.; Furlan, Elise; Ricker, G.; Vanderspek, R.; Latham, David W.; Winn, Joshua N.; Winn, Joshua N.; Jenkins, Jon M.; Twicken, Joseph D.; Rose, Mark; Smith, Jeffrey C.; Glidden, Ana; Levine, Alan M.; Rinehart, Stephen A.; Collins, Karen A.; Mann, Andrew W.; Burt, Jennifer; James, D. J.; Siverd, Robert J.; Günther, Maximilian N.

doi:10.3847/1538-3881/ab84f2

Cited by 18 publications

(10 citation statements)

References 98 publications

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“…A detailed analysis of transit probabilities for known RV exoplanets by Dalba et al (2019) resulted in a prediction of about three transit detections during the TESS primary mission. Our reporting of transits for two of the HD136352 planets, combined with the detected transit for HD118203b (Pepper et al 2020), brings the total number of RV planets revealed to be transiting in line with the Dalba et al (2019) predictions. Note that the TESS extended mission will likely lead to further transit detections of known RV planets whose orbital periods are longer than TESS observations of their host star during the primary mission.…”

Section: System Propertiessupporting

confidence: 72%

“…The survey strategy of TESS thus provides a space-based means to systematically examine all of the known RV systems for potential transits of their planets that pass through inferior conjunction during the TESS observing window (Kane & von Braun 2008;Dalba et al 2019). This has been demonstrated through the transit detection of an additional planet in the piMensae system (Huang et al 2018) and the known RV planet in the HD118203 system (Pepper et al 2020).…”

Section: Introductionmentioning

confidence: 99%

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Transits of Known Planets Orbiting a Naked-eye Star

Kane

Yalçınkaya

Osborn

et al. 2020

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Some of the most scientifically valuable transiting planets are those that were already known from radial velocity (RV) surveys. This is primarily because their orbits are well characterized and they preferentially orbit bright stars that are the targets of RV surveys. The Transiting Exoplanet Survey Satellite (TESS) provides an opportunity to survey most of the known exoplanet systems in a systematic fashion to detect possible transits of their planets. HD136352 (Nu 2 Lupi) is a naked-eye (V=5.78) G-type main-sequence star that was discovered to host three planets with orbital periods of 11.6, 27.6, and 108.1 days via RV monitoring with the High Accuracy Radial velocity Planet Searcher (HARPS) spectrograph. We present the detection and characterization of transits for the two inner planets of the HD136352 system, revealing radii of-+ 0.41 g cm −3 for planets b and c, respectively, thus placing them on either side of the radius valley. The combination of the multitransiting planet system, the bright host star, and the diversity of

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Section: System Propertiessupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Transits of Known Planets Orbiting a Naked-eye Star

Kane

Yalçınkaya

Osborn

et al. 2020

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“…The PDF of stellar mass and age (and their correlated parameters) show bimodality, which can be seen in Figure A1. This type of bimodality has been observed in several recent studies (Grieves et al 2021;Ikwut-Ukwa et al 2020;Carmichael et al 2020Carmichael et al , 2021Pepper et al 2020) and it appears due to the degeneracy between the MIST isochrones in the region of T eff -log g * plane occupied by TOI-1789. The two peaks in the PDF are centered at a mass of 1.35 M (age = 4.15 Gyr) and 1.51 M (age = 2.71 Gyr) with the probability of 32% and 68%, respectively.…”

Section: Modelling the Host Starsupporting

confidence: 65%

Discovery of an inflated hot Jupiter around a slightly evolved star TOI-1789

Khandelwal,

Chaturvedi,

Chakraborty

et al. 2021

Preprint

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We report here the discovery of a hot Jupiter at an orbital period of 3.208666 ± 0.000016 days around TOI-1789 (TYC 1962-00303-1, T ES S mag = 9.1) based on the TESS photometry, ground-based photometry, and high-precision radial velocity observations. The high-precision radial velocity observations were obtained from the high-resolution spectrographs, PARAS at Physical Research Laboratory (PRL), India, and TCES at Thüringer Landessternwarte Tautenburg (TLS), Germany, and the ground-based transit observations were obtained using the 0.43 m telescope at PRL with the Bessel-R filter. The host star is a slightly evolved (log g * = 3.939 +0.024 −0.046 ), late F-type (T eff = 5984 +55 −57 K), metal-rich star ([Fe/H]= 0.370 +0.073 −0.089 dex) with a radius of R * = 2.172 +0.037 −0.035 R located at a distance of 223.56 +0.91 −0.90 pc. The simultaneous fitting of the multiple light curves and the radial velocity data of TOI-1789 reveals that TOI-1789b has a mass of M P = 0.70 ± 0.16 M J , a radius of R P = 1.40 +0.22 −0.13 R J , and a bulk density of ρ P = 0.31 +0.15 −0.13 g cm −3 with an orbital separation of a = 0.04873 +0.00065 −0.0016 AU. This puts TOI-1789b in the category of inflated hot Jupiters. It is one of the few nearby evolved stars with a close-in planet. The detection of such systems will contribute to our understanding of mechanisms responsible for inflation in hot Jupiters and also provide an opportunity to understand the evolution of planets around stars leaving the main sequence branch.

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“…This first-order acceleration parameter constitutes a lower limit for the semi-amplitude through (t f −t i )× γ/2 with t f and t i being the final and first timestamps. Following the Monte Carlo approach in Kane et al (2019) (see also Pepper et al 2020), Planet density (g cm −3 ) -1.3 ± 0.5 (M p sin i) c…”

Section: Resultsmentioning

confidence: 99%

Radial velocity confirmation of a hot super-Neptune discovered by TESS with a warm Saturn–mass companion

Knudstrup

Nowak

Persson

et al. 2022

Monthly Notices of the Royal Astronomical Society

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We report the discovery and confirmation of the planetary system TOI-1288. This late G dwarf harbours two planets: TOI-1288 b and TOI-1288 c. We combine TESS space-borne and ground-based transit photometry with HARPS-N and HIRES high-precision Doppler measurements, which we use to constrain the masses of both planets in the system and the radius of planet b. TOI-1288 b has a period of $2.699835^{+0.000004}_{-0.000003}$ d, a radius of 5.24 ± 0.09 R⊕, and a mass of 42 ± 3 M⊕, making this planet a hot transiting super-Neptune situated right in the Neptunian desert. This desert refers to a paucity of Neptune-sized planets on short period orbits. Our 2.4-year-long Doppler monitoring of TOI-1288 revealed the presence of a Saturn-mass planet on a moderately eccentric orbit ($0.13^{+0.07}_{-0.09}$) with a minimum mass of 84 ± 7 M⊕ and a period of $443^{+11}_{-13}$ d. The 5 sectors worth of TESS data do not cover our expected mid-transit time for TOI-1288 c, and we do not detect a transit for this planet in these sectors.

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TESS Reveals HD 118203 b to be a Transiting Planet

Cited by 18 publications

References 98 publications

Transits of Known Planets Orbiting a Naked-eye Star

Transits of Known Planets Orbiting a Naked-eye Star

Discovery of an inflated hot Jupiter around a slightly evolved star TOI-1789

Radial velocity confirmation of a hot super-Neptune discovered by TESS with a warm Saturn–mass companion

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