KELT-24b: A 5M<sub>J</sub> Planet on a 5.6 day Well-aligned Orbit around the Young V = 8.3 F-star HD 93148

Rodriguez, Joseph E.; Eastman, Jason D.; Zhou, George; Quinn, Samuel N.; Beatty, Thomas G.; Penev, K.; Johnson, Marshall C.; Cargile, Phillip A.; Latham, David W.; Bieryla, Allyson; Collins, Karen A.; Dressing, Courtney D.; Ciardi, David R.; Relles, Howard M.; Murawski, Gabriel; Nishiumi, Taku; Yonehara, A.; Ishimaru, Ryo; Yoshida, Fumi; Gregorio, J.; Lund, Michael B.; Stevens, Daniel J.; Stassun, Keivan G.; Gaudi, B. Scott; Colón, Knicole D.; Pepper, Joshua; Narita, Norio; Awiphan, S.; Chuanraksasat, Pongpichit; Benni, Paul; Zambelli, Roberto; Garrison, Lehman H.; Wilson, Maurice L.; Cornachione, Matthew A.; Wang, Sharon X.; Labadie-Bartz, Jonathan; Rodriguez, R.; Siverd, Robert J.; Yao, Xinyu; Bayliss, Daniel; Berlind, P.; Calkins, M.; Christiansen, Jessie L.; Cohen, David H.; Conti, Dennis M.; Curtis, Ivan A.; DePoy, D. L.; Esquerdo, Gilbert A.; Evans, P.; Feliz, Dax L.; Fulton, Benjamin J.; Holoien, T. W. S.; James, D. J.; Jayasinghe, T.; Jang‐Condell, Hannah; Jensen, Eric L. N.; Johnson, John Asher; Joner, M. D.; Khakpash, Somayeh; Kielkopf, John F.; Kuhn, Rudolf B.; Manner, Mark; Marshall, J. L.; McLeod, Kim K.; McCrady, Nate; Oberst, Thomas E.; Oelkers, Ryan J.; Penny, Matthew T.; Reed, Phillip A.; Sliski, David H.; Shappee, B. J.; Stephens, Denise C.; Stockdale, Chris; Tan, T. G.; Trueblood, Mark; Trueblood, P.; Villanueva, Steven; Wittenmyer, Robert A.; Wright, Jason T.

doi:10.3847/1538-3881/ab4136

Cited by 21 publications

(5 citation statements)

References 101 publications

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“…Less challenging follow-up would be spin-orbit alignment through Rossiter-Mclaughlin, where the signal is expected to be >200 m s −1 and the transit timescale ( 5 h) is much shorter than the rotational jitter (1.65 days). Recent measurements of stellar obliquity in young planetary systems have found that they are generally aligned with their host stars (e.g., Rodriguez et al 2019;Zhou et al 2020;Wirth et al 2021), suggesting that these planets formed in situ or migrated through their protoplanetary disk. However, the number of misaligned systems even around older stars is 10% (varying with spectral type and planet mass; Fabrycky & Winn 2009; Morton & Winn 2014;Campante et al 2016).…”

Section: Summary and Discussionmentioning

confidence: 99%

TESS Hunt for Young and Maturing Exoplanets (THYME) VI: an 11 Myr giant planet transiting a very low-mass star in Lower Centaurus Crux

Mann,

Wood,

Schmidt

et al. 2021

Preprint

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Mature super-Earths and sub-Neptunes are predicted to be Jovian radius when younger than 10 Myr. Thus, we expect to find 5-15R ⊕ planets around young stars even if their older counterparts harbor none. We report the discovery and validation of TOI 1227 b, a 0.85 ± 0.05 R J (9.5R ⊕ ) planet transiting a very low-mass star (0.170 ± 0.015 M ) every 27.4 days. TOI 1227's kinematics and strong lithium absorption confirm it is a member of a previously discovered sub-group in the Lower Centaurus Crux OB association, which we designate the Musca group. We derive an age of 11±2 Myr for Musca, based on lithium, rotation, and the color-magnitude diagram of Musca members. The TESS data and ground-based followup show a deep (2.5%) transit. We use multiwavelength transit observations and radial velocities from the IGRINS spectrograph to validate the signal as planetary in nature, and we obtain an upper limit on the planet mass of 0.5 M J . Because such large planets are exceptionally rare around mature low-mass stars, we suggest that TOI 1227 b is still contracting and will eventually turn into one of the more common < 5R ⊕ planets.

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Section: Summary and Discussionmentioning

confidence: 99%

TESS Hunt for Young and Maturing Exoplanets (THYME) VI: an 11 Myr giant planet transiting a very low-mass star in Lower Centaurus Crux

Mann,

Wood,

Schmidt

et al. 2021

Preprint

Self Cite

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“…5: This companion was detected with AO imaging by Rodriguez et al (2019) using Keck/NIRC 2, but is also listed in the Gaia DR2, whose astrometry was used by this team to verify the equidistance and common proper motion of this companion with the exoplanet host star MASCARA-3 A, as done in this study. 6: This companion was already reported by Nielsen et al (2019), who proved its companionship with the exoplanet host star WASP-175 A with Gaia DR2 astrometry, consistent with the results derived here.…”

Section: Comments On Individual Objectsmentioning

confidence: 93%

Search for (sub)stellar companions of exoplanet hosts by exploring the second ESA-Gaia data release

Michel¹,

Mugrauer²

2021

Preprint

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We present the latest results of an ongoing multiplicity survey of exoplanet hosts, which was initiated at the Astrophysical Institute and University Observatory Jena, using data from the second data release of the ESA-Gaia mission. In this study the multiplicity of 289 targets was investigated, all located within a distance of about 500 pc from the Sun. In total, 41 binary, and 5 hierarchical triple star systems with exoplanets were detected in the course of this project, yielding a multiplicity rate of the exoplanet hosts of about 16 %. A total of 61 companions (47 stars, a white dwarf, and 13 brown dwarfs) were detected around the targets, whose equidistance and common proper motion with the exoplanet hosts were proven with their precise Gaia DR2 astrometry, which also agrees with the gravitational stability of most of these systems. The detected companions exhibit masses from about 0.016 up to 1.66 M and projected separations in the range between about 52 and 9555 au.

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“…d This companion of the exoplanet host star HD 85628 A was discovered by Dorval et al (2020) in the Gaia DR2, who found its parallax and proper motion consistent with that of the exoplanet host star, confirmed by the astrometric analysis, presented here. e This companion was detected with AO imaging by Rodriguez et al (2019) using Keck/NIRC 2, but is also listed in the Gaia DR2, whose astrometry was used by this team to verify the equidistance and common proper motion of this companion with the exoplanet host star MASCARA-3 A, as done in this study. f This companion was already reported by Nielsen et al (2019), who proved its companionship with the exoplanet host star WASP-175 A with Gaia DR2 astrometry, consistent with the results derived here.…”

Section: Detected Companions Of Exoplanet Hostsmentioning

confidence: 98%

Search for (sub)stellar Companions of Exoplanet Hosts by Exploring the Second ESA-Gaia Data Release

Michel¹,

Mugrauer²

2021

Front. Astron. Space Sci.

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We present the latest results of an ongoing multiplicity survey of exoplanet hosts, which was initiated at the Astrophysical Institute and University Observatory Jena, using data from the second data release of the ESA-Gaia mission. In this study the multiplicity of 289 targets was investigated, all located within a distance of about 500 pc from the Sun. In total, 41 binary, and five hierarchical triple star systems with exoplanets were detected in the course of this project, yielding a multiplicity rate of the exoplanet hosts of about 16%. A total of 61 companions (47 stars, a white dwarf, and 13 brown dwarfs) were detected around the targets, whose equidistance and common proper motion with the exoplanet hosts were proven with their precise Gaia DR2 astrometry, which also agrees with the gravitational stability of most of these systems. The detected companions exhibit masses from about 0.016 up to 1.66 M⊙ and projected separations in the range between about 52 and 9,555 au.

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KELT-24b: A 5M_J Planet on a 5.6 day Well-aligned Orbit around the Young V = 8.3 F-star HD 93148

Abstract: We present the discovery of KELT-24 b, a massive hot Jupiter orbiting a bright (V=8.3 mag, K=7.2 mag) young F-star with a period of 5.6 days. The host star, KELT-24 (HD 93148), has a T eff = -+ 6509 49 50 K, a mass of M * =

Cited by 21 publications

References 101 publications

TESS Hunt for Young and Maturing Exoplanets (THYME) VI: an 11 Myr giant planet transiting a very low-mass star in Lower Centaurus Crux

TESS Hunt for Young and Maturing Exoplanets (THYME) VI: an 11 Myr giant planet transiting a very low-mass star in Lower Centaurus Crux

Search for (sub)stellar companions of exoplanet hosts by exploring the second ESA-Gaia data release

Search for (sub)stellar Companions of Exoplanet Hosts by Exploring the Second ESA-Gaia Data Release

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KELT-24b: A 5MJ Planet on a 5.6 day Well-aligned Orbit around the Young V = 8.3 F-star HD 93148

Abstract: We present the discovery of KELT-24 b, a massive hot Jupiter orbiting a bright (V=8.3 mag, K=7.2 mag) young F-star with a period of 5.6 days. The host star, KELT-24 (HD 93148), has a T eff = -+ 6509 49 50 K, a mass of M * =

Cited by 21 publications

References 101 publications

TESS Hunt for Young and Maturing Exoplanets (THYME) VI: an 11 Myr giant planet transiting a very low-mass star in Lower Centaurus Crux

TESS Hunt for Young and Maturing Exoplanets (THYME) VI: an 11 Myr giant planet transiting a very low-mass star in Lower Centaurus Crux

Search for (sub)stellar companions of exoplanet hosts by exploring the second ESA-Gaia data release

Search for (sub)stellar Companions of Exoplanet Hosts by Exploring the Second ESA-Gaia Data Release

Contact Info

Product

Resources

About

KELT-24b: A 5M_J Planet on a 5.6 day Well-aligned Orbit around the Young V = 8.3 F-star HD 93148