TESS Spots a Super-puff: The Remarkably Low Density of TOI-1420b

Stephanie Yoshida; Shreyas Vissapragada; David W. Latham; Allyson Bieryla; Daniel P. Thorngren; Jason D. Eastman; Mercedes López-Morales; Khalid Barkaoui; Charles Beichman; Perry Berlind; Lars A. Buchave; Michael L. Calkins; David R. Ciardi; Karen A. Collins; Rosario Cosentino; Ian J. M. Crossfield; Fei Dai; Victoria DiTomasso; Nicholas Dowling; Gilbert A. Esquerdo; Raquel Forés-Toribio; Adriano Ghedina; Maria V. Goliguzova; Eli Golub; Erica J. Gonzales; Ferran Grau Horta; Jesus Higuera; Nora Hoch; Keith Horne; Steve B. Howell; Jon M. Jenkins; Jessica Klusmeyer; Didier Laloum; Jack J. Lissauer; Sarah E. Logsdon; Luca Malavolta; Rachel A. Matson; Elisabeth C. Matthews; Kim K. McLeod; Jennifer V. Medina; Jose A. Muñoz; Hugh P. Osborn; Boris Safonov; Joshua Schlieder; Michael Schmidt; Heidi Schweiker; Sara Seager; Alessandro Sozzetti; Gregor Srdoc; Guđmundur Stefánsson; Ivan A. Strakhov; Stephanie Striegel; Joel Villaseñor; Joshua N. Winn

doi:10.3847/1538-3881/acf858

TESS Spots a Super-puff: The Remarkably Low Density of TOI-1420b

Stephanie Yoshida^*
, Shreyas Vissapragada
, David W. Latham
, Allyson Bieryla
, Daniel P. Thorngren
, Jason D. Eastman
, Mercedes López-Morales
, Khalid Barkaoui
, Charles Beichman
, Perry Berlind
, Lars A. Buchave
, Michael L. Calkins
, David R. Ciardi
, Karen A. Collins
, Rosario Cosentino
, Ian J. M. Crossfield
, Fei Dai
, Victoria DiTomasso
, Nicholas Dowling
, Gilbert A. Esquerdo

Raquel Forés-Toribio, Adriano Ghedina, Maria V. Goliguzova, Eli Golub, Erica J. Gonzales, Ferran Grau Horta, Jesus Higuera, Nora Hoch, Keith Horne, Steve B. Howell, Jon M. Jenkins, Jessica Klusmeyer, Didier Laloum, Jack J. Lissauer, Sarah E. Logsdon, Luca Malavolta, Rachel A. Matson, Elisabeth C. Matthews, Kim K. McLeod, Jennifer V. Medina, Jose A. Muñoz, Hugh P. Osborn, Boris Safonov, Joshua Schlieder, Michael Schmidt, Heidi Schweiker, Sara Seager, Alessandro Sozzetti, Gregor Srdoc, Guđmundur Stefánsson, Ivan A. Strakhov, Stephanie Striegel, Joel Villaseñor, Joshua N. Winn

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

We present the discovery of TOI-1420b, an exceptionally low-density (ρ = 0.08 ± 0.02 g cm⁻³) transiting planet in a P = 6.96 days orbit around a late G-dwarf star. Using transit observations from TESS, LCOGT, Observatoire Privé du Mont, Whitin, Wendelstein, OAUV, Ca l'Ou, and KeplerCam, along with radial velocity observations from HARPS-N and NEID, we find that the planet has a radius of R_p = 11.9 ± 0.3R_⊕ and a mass of M_p = 25.1 ± 3.8M_⊕. TOI-1420b is the largest known planet with a mass less than 50M_⊕, indicating that it contains a sizeable envelope of hydrogen and helium.

Original language	English
Article number	181
Journal	The Astronomical Journal
Volume	166
Issue number	5
Number of pages	12
DOIs	https://doi.org/10.3847/1538-3881/acf858
Publication status	Published - 2023

Keywords

Exoplanets
Transits
Exoplanet structure

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Yoshida, S., Vissapragada, S., Latham, D. W., Bieryla, A., Thorngren, D. P., Eastman, J. D., López-Morales, M., Barkaoui, K., Beichman, C., Berlind, P., Buchave, L. A., Calkins, M. L., Ciardi, D. R., Collins, K. A., Cosentino, R., Crossfield, I. J. M., Dai, F., DiTomasso, V., Dowling, N., ... Winn, J. N. (2023). TESS Spots a Super-puff: The Remarkably Low Density of TOI-1420b. The Astronomical Journal, 166(5), Article 181. https://doi.org/10.3847/1538-3881/acf858

@article{3510d0af47404eeb9afa83725798ed4b,

title = "TESS Spots a Super-puff: The Remarkably Low Density of TOI-1420b",

abstract = "We present the discovery of TOI-1420b, an exceptionally low-density (ρ = 0.08 ± 0.02 g cm−3) transiting planet in a P = 6.96 days orbit around a late G-dwarf star. Using transit observations from TESS, LCOGT, Observatoire Priv{\'e} du Mont, Whitin, Wendelstein, OAUV, Ca l'Ou, and KeplerCam, along with radial velocity observations from HARPS-N and NEID, we find that the planet has a radius of Rp = 11.9 ± 0.3R⊕ and a mass of Mp = 25.1 ± 3.8M⊕. TOI-1420b is the largest known planet with a mass less than 50M⊕, indicating that it contains a sizeable envelope of hydrogen and helium. ",

keywords = "Exoplanets, Transits, Exoplanet structure",

author = "Stephanie Yoshida and Shreyas Vissapragada and Latham, \{David W.\} and Allyson Bieryla and Thorngren, \{Daniel P.\} and Eastman, \{Jason D.\} and Mercedes L{\'o}pez-Morales and Khalid Barkaoui and Charles Beichman and Perry Berlind and Buchave, \{Lars A.\} and Calkins, \{Michael L.\} and Ciardi, \{David R.\} and Collins, \{Karen A.\} and Rosario Cosentino and Crossfield, \{Ian J. M.\} and Fei Dai and Victoria DiTomasso and Nicholas Dowling and Esquerdo, \{Gilbert A.\} and Raquel For{\'e}s-Toribio and Adriano Ghedina and Goliguzova, \{Maria V.\} and Eli Golub and Gonzales, \{Erica J.\} and Horta, \{Ferran Grau\} and Jesus Higuera and Nora Hoch and Keith Horne and Howell, \{Steve B.\} and Jenkins, \{Jon M.\} and Jessica Klusmeyer and Didier Laloum and Lissauer, \{Jack J.\} and Logsdon, \{Sarah E.\} and Luca Malavolta and Matson, \{Rachel A.\} and Matthews, \{Elisabeth C.\} and McLeod, \{Kim K.\} and Medina, \{Jennifer V.\} and Mu{\~n}oz, \{Jose A.\} and Osborn, \{Hugh P.\} and Boris Safonov and Joshua Schlieder and Michael Schmidt and Heidi Schweiker and Sara Seager and Alessandro Sozzetti and Gregor Srdoc and Gu{\d}mundur Stef{\'a}nsson and Strakhov, \{Ivan A.\} and Stephanie Striegel and Joel Villase{\~n}or and Winn, \{Joshua N.\}",

year = "2023",

doi = "10.3847/1538-3881/acf858",

language = "English",

volume = "166",

journal = "The Astronomical Journal",

publisher = "The American Astronomical Society",

number = "5",

}

Yoshida, S, Vissapragada, S, Latham, DW, Bieryla, A, Thorngren, DP, Eastman, JD, López-Morales, M, Barkaoui, K, Beichman, C, Berlind, P, Buchave, LA, Calkins, ML, Ciardi, DR, Collins, KA, Cosentino, R, Crossfield, IJM, Dai, F, DiTomasso, V, Dowling, N, Esquerdo, GA, Forés-Toribio, R, Ghedina, A, Goliguzova, MV, Golub, E, Gonzales, EJ, Horta, FG, Higuera, J, Hoch, N, Horne, K, Howell, SB, Jenkins, JM, Klusmeyer, J, Laloum, D, Lissauer, JJ, Logsdon, SE, Malavolta, L, Matson, RA, Matthews, EC, McLeod, KK, Medina, JV, Muñoz, JA, Osborn, HP, Safonov, B, Schlieder, J, Schmidt, M, Schweiker, H, Seager, S, Sozzetti, A, Srdoc, G, Stefánsson, G, Strakhov, IA, Striegel, S, Villaseñor, J & Winn, JN 2023, 'TESS Spots a Super-puff: The Remarkably Low Density of TOI-1420b', The Astronomical Journal, vol. 166, no. 5, 181. https://doi.org/10.3847/1538-3881/acf858

TY - JOUR

T1 - TESS Spots a Super-puff: The Remarkably Low Density of TOI-1420b

AU - Yoshida, Stephanie

AU - Vissapragada, Shreyas

AU - Latham, David W.

AU - Bieryla, Allyson

AU - Thorngren, Daniel P.

AU - Eastman, Jason D.

AU - López-Morales, Mercedes

AU - Barkaoui, Khalid

AU - Beichman, Charles

AU - Berlind, Perry

AU - Buchave, Lars A.

AU - Calkins, Michael L.

AU - Ciardi, David R.

AU - Collins, Karen A.

AU - Cosentino, Rosario

AU - Crossfield, Ian J. M.

AU - Dai, Fei

AU - DiTomasso, Victoria

AU - Dowling, Nicholas

AU - Esquerdo, Gilbert A.

AU - Forés-Toribio, Raquel

AU - Ghedina, Adriano

AU - Goliguzova, Maria V.

AU - Golub, Eli

AU - Gonzales, Erica J.

AU - Horta, Ferran Grau

AU - Higuera, Jesus

AU - Hoch, Nora

AU - Horne, Keith

AU - Howell, Steve B.

AU - Jenkins, Jon M.

AU - Klusmeyer, Jessica

AU - Laloum, Didier

AU - Lissauer, Jack J.

AU - Logsdon, Sarah E.

AU - Malavolta, Luca

AU - Matson, Rachel A.

AU - Matthews, Elisabeth C.

AU - McLeod, Kim K.

AU - Medina, Jennifer V.

AU - Muñoz, Jose A.

AU - Osborn, Hugh P.

AU - Safonov, Boris

AU - Schlieder, Joshua

AU - Schmidt, Michael

AU - Schweiker, Heidi

AU - Seager, Sara

AU - Sozzetti, Alessandro

AU - Srdoc, Gregor

AU - Stefánsson, Guđmundur

AU - Strakhov, Ivan A.

AU - Striegel, Stephanie

AU - Villaseñor, Joel

AU - Winn, Joshua N.

PY - 2023

Y1 - 2023

N2 - We present the discovery of TOI-1420b, an exceptionally low-density (ρ = 0.08 ± 0.02 g cm−3) transiting planet in a P = 6.96 days orbit around a late G-dwarf star. Using transit observations from TESS, LCOGT, Observatoire Privé du Mont, Whitin, Wendelstein, OAUV, Ca l'Ou, and KeplerCam, along with radial velocity observations from HARPS-N and NEID, we find that the planet has a radius of Rp = 11.9 ± 0.3R⊕ and a mass of Mp = 25.1 ± 3.8M⊕. TOI-1420b is the largest known planet with a mass less than 50M⊕, indicating that it contains a sizeable envelope of hydrogen and helium.

AB - We present the discovery of TOI-1420b, an exceptionally low-density (ρ = 0.08 ± 0.02 g cm−3) transiting planet in a P = 6.96 days orbit around a late G-dwarf star. Using transit observations from TESS, LCOGT, Observatoire Privé du Mont, Whitin, Wendelstein, OAUV, Ca l'Ou, and KeplerCam, along with radial velocity observations from HARPS-N and NEID, we find that the planet has a radius of Rp = 11.9 ± 0.3R⊕ and a mass of Mp = 25.1 ± 3.8M⊕. TOI-1420b is the largest known planet with a mass less than 50M⊕, indicating that it contains a sizeable envelope of hydrogen and helium.

KW - Exoplanets

KW - Transits

KW - Exoplanet structure

U2 - 10.3847/1538-3881/acf858

DO - 10.3847/1538-3881/acf858

M3 - Journal article

VL - 166

JO - The Astronomical Journal

JF - The Astronomical Journal

IS - 5

M1 - 181

ER -

TESS Spots a Super-puff: The Remarkably Low Density of TOI-1420b

Abstract

Keywords

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