HD 213885b: a transiting 1-d-period super-Earth with an Earth-like composition around a bright (<i>V</i> = 7.9) star unveiled by <i>TESS</i>

Espinoza, N.; Brahm, R.; Henning, Thomas; Jordán, Andrés; Dorn, Caroline; Rojas, Felipe; Sarkis, P.; Kossakowski, D.; Schlecker, Martin; Díaz, Matías R.; Jenkins, James S.; Aguilera-Gómez, Claudia; Jenkins, Jon M.; Twicken, Joseph D.; Collins, Karen A.; Lissauer, Jack J.; Armstrong, David J.; Adibekyan, V.; Barrado, D.; Barros, S. C. C.; Battley, Matthew P.; Bayliss, Daniel; Bouchy, F.; Bryant, Edward M.; Cooke, Benjamin F.; Demangeon, O.; Dumusque, X.; Figueira, P.; Giles, H.; Lillo-Box, J.; Lovis, C.; Nielsen, L. D.; Pepe, F.; Pollacco, D.; Santos, N. C.; Sousa, S. G.; Udry, S.; Wheatley, P. J.; Turner, O. D.; Marmier, M.; Ségransan, D.; Ricker, G.; Latham, David W.; Seager, Sara; Winn, Joshua N.; Kielkopf, John F.; Hart, Rhodes; Wingham, Geof; Jensen, Eric L. N.; Hełminiak, K. G.; Tokovinin, Andreï; Briceño, César; Ziegler, Carl; Law, Nicholas M.; Mann, Andrew W.; Daylan, Tansu; Doty, J.; Guerrero, Natalia; Boyd, Patricia T.; Crossfield, Ian J. M.; Morris, Robert; Henze, Christopher E.; Chacon, A. D.

doi:10.1093/mnras/stz3150

Cited by 48 publications

(16 citation statements)

References 73 publications

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“…The TESS survey is observing every TESS planet candidate visible from the South. Currently over 800 targets have been observed, with over 200 having nearby companions, and the speckle observations have contributed to the confirmation of over 40 planets [e.g., Espinoza et al, (2019); Jones et al (2019); Quinn et al, (2019); Rodriguez et al, (2019); Vanderburg et al, (2019)]. This has resulted in the best evidence yet that close, Solar System scale binary systems suppress planet formation.…”

Section: Resultsmentioning

confidence: 99%

Robo-AO and SOAR High-Resolution Surveys of Exoplanet Hosting Stars

Ziegler

Law

Baranec

et al. 2021

Front. Astron. Space Sci.

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In the past decade, space-based transit surveys have delivered thousands of potential planet-hosting systems. Each of these needs to be vetted and characterized using follow-up high-resolution imaging. We perform comprehensive imaging surveys of the candidate exoplanets detected by the Kepler and TESS missions using the fully autonomous Robo-AO system and the largely autonomous SOAR speckle imaging system. The surveys yielded hundreds of previously unknown close binary systems hosting exoplanets and resulted in verification of hundreds of exoplanet systems. Evidence of the interaction between binary stars and planetary systems was also detected, including a deep deficit of planets in close binary systems.

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Section: Resultsmentioning

confidence: 99%

Robo-AO and SOAR High-Resolution Surveys of Exoplanet Hosting Stars

Ziegler

Law

Baranec

et al. 2021

Front. Astron. Space Sci.

Self Cite

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“…CBVs remove longstanding systematic trends and provide better data quality (Tenenbaum & Jenkins 2018). Another approach would be to use the light curves derived from the data validation timeseries (DVT) files as in Ridden-Harper, Turner, & Jayawardhana (2020), however a standard process for the analysis of TESS data is the use of the PDC light curve (Espinoza et al 2020;Shporer et al 2019;J. D. Turner, Ridden-Harper, & Jayawardhana 2021).…”

Section: Observationsmentioning

confidence: 99%

On the parameter refinement of inflated exoplanets with large radius uncertainty based on TESS observations

Alexoudi

2022

Preprint

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We revisited ten known exoplanetary systems using publicly available data provided by the Transiting Exoplanet Survey Satellite (TESS). The sample presented in this work consists of short period transiting exoplanets, with inflated radii and large reported uncertainty on their planetary radii. The precise determination of these values is crucial in order to develop accurate evolutionary models and understand the inflation mechanisms of these systems. Aiming to evaluate the planetary radius measurement, we made use of the planet-to-star radii ratio, a quantity that can be measured during a transit event. We fit the obtained transit light curves of each target with a detrending model and a transit model. Furthermore, we used emcee, which is based on a Markov chain Monte Carlo approach, to assess the best fit posterior distributions of each system parameter of interest. We refined the planetary radius of WASP-140 b by approximately 12%, and we derived a better precision on its reported asymmetric radius uncertainty by approximately 86% and 67%. We also refined the orbital parameters of WASP-120 b by 2σ. Moreover, using the high-cadence TESS datasets, we were able to solve a discrepancy in the literature, regarding the planetary radius of the exoplanet WASP-93 b. For all the other exoplanets in our sample, even though there is a tentative trend that planetary radii of (near-) grazing systems have been slightly overestimated in the literature, the planetary radius estimation and the orbital parameters were confirmed with independent observations from space, showing that TESS and ground-based observations are overall in good agreement.

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“…Note that, there are no good targets for the SiO detection in the exoplanets detected so far. On the other hand, recent observations have reported the detection of new close-in rocky-density exoplanets such as K2-141 b [4] and HD 213885 b [15] (see their observed values of d * and T irr in Fig. 6) which are hotter than 55 Cnc e. Motivated by such an observational progress, the number of planets potentially having a detectable signature of mineral atmosphere are also discussed in Section 4.4.…”

Section: Parameter Space Of Detectionmentioning

confidence: 99%

Detectability of Rocky-Vapour atmospheres on super-Earths with Ariel

et al. 2021

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Ariel will mark the dawn of a new era as the first large-scale survey characterising exoplanetary atmospheres with science objectives to address fundamental questions about planetary composition, evolution and formation. In this study, we explore the detectability of atmospheres vaporised from magma oceans on dry, rocky Super-Earths orbiting very close to their host stars. The detection of such atmospheres would provide a definitive piece of evidence for rocky planets but are challenging measurements with currently available instruments due to their small spectral signatures. However, some of the hottest planets are believed to have atmospheres composed of vaporised rock, such as Na and SiO, with spectral signatures bright enough to be detected through eclipse observations with planned space-based telescopes. In this study, we find that rocky super-Earths with a irradiation temperature of 3000 K and a distance from Earth of up to 20 pc, as well as planets hotter than 3500 K and closer than 50 pc, have SiO features which are potentially detectable in eclipse spectra observed with Ariel.

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HD 213885b: a transiting 1-d-period super-Earth with an Earth-like composition around a bright (V = 7.9) star unveiled by TESS

Cited by 48 publications

References 73 publications

Robo-AO and SOAR High-Resolution Surveys of Exoplanet Hosting Stars

Robo-AO and SOAR High-Resolution Surveys of Exoplanet Hosting Stars

On the parameter refinement of inflated exoplanets with large radius uncertainty based on TESS observations

Detectability of Rocky-Vapour atmospheres on super-Earths with Ariel

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