TOI-677b: A Warm Jupiter (P = 11.2 days) on an Eccentric Orbit Transiting a Late F-type Star

Jordán, Andrés; Brahm, R.; Espinoza, N.; Henning, Thomas; Jones, M. I.; Kossakowski, D.; Sarkis, P.; Trifonov, T.; Rojas, Felipe; Torres, Pascal; Drass, H.; Nandakumar, Sangeetha; Barbieri, M.; Davis, Allen B.; Wang, Songhu; Bayliss, Daniel; Bouma, Luke G.; Dragomir, Diana; Eastman, Jason D.; Daylan, Tansu; Guerrero, Natalia; Barclay, Thomas; Ting, Eric B.; Henze, Christopher E.; Ricker, G.; Vanderspek, R.; Latham, David W.; Seager, Sara; Winn, Joshua N.; Jenkins, Jon M.; Wittenmyer, Robert A.; Bowler, Brendan P.; Crossfield, Ian J. M.; Horner, Jonathan; Kane, Stephen R.; Kielkopf, John F.; Plavchan, Peter; Tinney, C. G.; Addison, Brett C.; Mengel, M. W.; Okumura, Jack; Shahaf, Sahar; Mazeh, T.; Shporer, Avi; Ziegler, Carl; Mann, Andrew W.; Hart, Rhodes

doi:10.3847/1538-3881/ab6f67

Cited by 41 publications

(44 citation statements)

References 77 publications

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“…As of 2020 August, there have been 66 confirmed planetary discoveries made as a result of TESS' ongoing survey (e.g. Huang et al 2018;Nielsen et al 2019b;Vanderspek et al 2019;Addison et al 2020;Gilbert et al 2020;Jordán et al 2020). In addition to the 66 confirmed TESS exoplanets, there are more than two thousand TESS Targets of Interest (TOI) and Community Targets of Interest (CTOI) 2 waiting for their exoplanetary status to be confirmed by ground-based teams (e.g Addison et al 2019;Davis et al 2019;Nielsen et al 2019b;Wang et al 2019a;Dalba et al 2020;Eisner et al 2020).…”

Section: Introductionmentioning

confidence: 99%

The GALAH Survey: using galactic archaeology to refine our knowledge of TESS target stars

Clark

Clerte

Hinkel

et al. 2021

Monthly Notices of the Royal Astronomical Society

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An unprecedented number of exoplanets are being discovered by the Transiting Exoplanet Survey Satellite (TESS). Determining the orbital parameters of these exoplanets, and especially their mass and radius, will depend heavily upon the measured physical characteristics of their host stars. We have cross-matched spectroscopic, photometric, and astrometric data from GALAH Data Release 2, the TESS Input Catalog and Gaia Data Release 2, to create a curated, self-consistent catalog of physical and chemical properties for 47,285 stars. Using these data we have derived isochrone masses and radii that are precise to within 5%. We have revised the parameters of three confirmed, and twelve candidate, TESS planetary systems. These results cast doubt on whether CTOI-20125677 is indeed a planetary system since the revised planetary radii are now comparable to stellar sizes. Our GALAH-TESS catalog contains abundances for up to 23 elements. We have specifically analysed the molar ratios for C/O, Mg/Si, Fe/Si and Fe/Mg, to assist in determining the composition and structure of planets with Rp < 4R⊕. From these ratios, 36 % fall within 2 sigma of the Sun/Earth values, suggesting that these stars may host rocky exoplanets with geological compositions similar to planets found within our own Solar system.

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Section: Introductionmentioning

confidence: 99%

The GALAH Survey: using galactic archaeology to refine our knowledge of TESS target stars

Clark

Clerte

Hinkel

et al. 2021

Monthly Notices of the Royal Astronomical Society

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“…MINERVA-Australis is an array of four PlaneWave CDK700 telescopes located in Queensland, Australia, fully dedicated to the precise RV follow-up of TESS candidates (e.g., Addison et al 2020Addison et al , 2021Jordán et al 2020). The four telescopes can be simultaneously fiber-fed to a single KiwiSpec R4-100 highresolution (R = 80,000) spectrograph (Barnes et al 2012;Addison et al 2019).…”

Section: Minerva-australismentioning

confidence: 99%

“…While the current sample of warm giants is still small, the Transiting Exoplanet Survey Satellite (TESS; Ricker et al 2015) is expected to detect hundreds of such planets (Sullivan et al 2015;Barclay et al 2018). The Warm gIaNts with tEss collaboration (WINE; e.g., Brahm et al 2019;Jordán et al 2020) is using a network of photometric and spectroscopic facilities to follow up, confirm, and characterize warm giant candidates from TESS. One such candidate is TOI-201.01.…”

Section: Introductionmentioning

confidence: 99%

A Transiting Warm Giant Planet around the Young Active Star TOI-201

Brahm

Jordán

Espinoza

et al. 2021

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We present the confirmation of the eccentric warm giant planet TOI-201 b, first identified as a candidate in Transiting Exoplanet Survey Satellite photometry (Sectors 1-8, 10-13, and 27-28) and confirmed using groundbased photometry from Next Generation Transit Survey and radial velocities from FEROS, HARPS, CORALIE, and MINERVA-Australis. TOI-201 b orbits a young ( -+ 0.87 Gyr 0.49 0.46 ) and bright (V = 9.07 mag) F-type star with a 52.9781 day period. The planet has a mass of -+ M 0.42 0.03 0.05 J , a radius of -+ R 1.008 0.015 0.012 J , and an orbital eccentricity of -+ 0.28 ; 0.09 0.06 it appears to still be undergoing fairly rapid cooling, as expected given the youth of the host star. The star also shows long-term variability in both the radial velocities and several activity indicators, which we attribute to stellar activity. The discovery and characterization of warm giant planets such as TOI-201 b are important for constraining formation and evolution theories for giant planets.

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“…These observations were obtained in the context of the Warm gIaNts with tEss collaboration, which focuses on the systematic characterization of TESS transiting warm giant planets (e.g. Brahm et al 2019;Jordán et al 2020). FEROS has a spectral resolution of R ≈ 48 000 and uses a comparison fibre that can be pointed to the background sky or illuminated by a Thorium-Argon lamp simultaneously with the execution of the science exposure.…”

Section: Feros Spectroscopymentioning

confidence: 99%

TOI-431/HIP 26013: a super-Earth and a sub-Neptune transiting a bright, early K dwarf, with a third RV planet

Osborn

Armstrong

Cale

et al. 2021

Monthly Notices of the Royal Astronomical Society

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We present the bright (Vmag = 9.12), multiplanet system TOI-431, characterized with photometry and radial velocities (RVs). We estimate the stellar rotation period to be 30.5 ± 0.7 d using archival photometry and RVs. Transiting Exoplanet Survey Satellite (TESS) objects of Interest (TOI)-431 b is a super-Earth with a period of 0.49 d, a radius of 1.28 ± 0.04 R⊕, a mass of 3.07 ± 0.35 M⊕, and a density of 8.0 ± 1.0 g cm−3; TOI-431 d is a sub-Neptune with a period of 12.46 d, a radius of 3.29 ± 0.09 R⊕, a mass of $9.90^{+1.53}_{-1.49}$ M⊕, and a density of 1.36 ± 0.25 g cm−3. We find a third planet, TOI-431 c, in the High Accuracy Radial velocity Planet Searcher RV data, but it is not seen to transit in the TESS light curves. It has an Msin i of $2.83^{+0.41}_{-0.34}$ M⊕, and a period of 4.85 d. TOI-431 d likely has an extended atmosphere and is one of the most well-suited TESS discoveries for atmospheric characterization, while the super-Earth TOI-431 b may be a stripped core. These planets straddle the radius gap, presenting an interesting case-study for atmospheric evolution, and TOI-431 b is a prime TESS discovery for the study of rocky planet phase curves.

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TOI-677b: A Warm Jupiter (P = 11.2 days) on an Eccentric Orbit Transiting a Late F-type Star

Cited by 41 publications

References 77 publications

The GALAH Survey: using galactic archaeology to refine our knowledge of TESS target stars

The GALAH Survey: using galactic archaeology to refine our knowledge of TESS target stars

A Transiting Warm Giant Planet around the Young Active Star TOI-201

TOI-431/HIP 26013: a super-Earth and a sub-Neptune transiting a bright, early K dwarf, with a third RV planet

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