TOI-2498 b: a hot bloated super-Neptune within the Neptune desert

Ginger Frame; David J. Armstrong; Heather M. Cegla; Jorge Fernández Fernández; Ares Osborn; Vardan Adibekyan; Karen A. Collins; Elisa Delgado Mena; Steven Giacalone; John F. Kielkopf; Nuno C. Santos; Sergio G. Sousa; Keivan G. Stassun; Carl Ziegler; David R. Anderson; Susana C.C. Barros; Daniel Bayliss; Cesar Briceno; Dennis M. Conti; Courtney D. Dressing; Xavier Dumusque; Pedro Figueira; William Fong; Samuel Gill; Faith Hawthorn; Jon M. Jenkins; Eric L.N. Jensen; Marcelo Aron F. Keniger; David W. Latham; Nicholas Law; Jack J. Lissauer; Andrew W. Mann; Louise D. Nielsen; Hugh Osborn; Martin Paegert; Sara Seager; Richard P. Schwarz; Avi Shporer; Gregor Srdoc; Paul A. Strøm; Joshua N. Winn; Peter J. Wheatley

doi:10.1093/mnras/stad1452

TOI-2498 b: a hot bloated super-Neptune within the Neptune desert

Ginger Frame, David J. Armstrong, Heather M. Cegla, Jorge Fernández Fernández, Ares Osborn, Vardan Adibekyan, Karen A. Collins, Elisa Delgado Mena, Steven Giacalone, John F. Kielkopf, Nuno C. Santos, Sergio G. Sousa, Keivan G. Stassun, Carl Ziegler, David R. Anderson, Susana C.C. Barros, Daniel Bayliss, Cesar Briceno, Dennis M. Conti, Courtney D. DressingXavier Dumusque, Pedro Figueira, William Fong, Samuel Gill, Faith Hawthorn, Jon M. Jenkins, Eric L.N. Jensen, Marcelo Aron F. Keniger, David W. Latham, Nicholas Law, Jack J. Lissauer, Andrew W. Mann, Louise D. Nielsen, Hugh Osborn, Martin Paegert, Sara Seager, Richard P. Schwarz, Avi Shporer, Gregor Srdoc, Paul A. Strøm, Joshua N. Winn, Peter J. Wheatley

Astrophysical Sciences

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We present the discovery and confirmation of a transiting hot bloated super-Neptune using photometry from the Transiting Exoplanet Survey Satellite (TESS) and the Las Cumbres Observatory Global Telescope (LCOGT) and radial velocity measurements from the High Accuracy Radial velocity Planet Searcher (HARPS). The host star TOI-2498 is a V = 11.2, G-type (Teff = 5905 ± 12 K) solar-like star with a mass of 1.12 ± 0.02 M⊙ and a radius of 1.26 ± 0.04 R⊙. The planet, TOI-2498 b, orbits the star with a period of 3.7 d, has a radius of 6.1 ± 0.3 R⊕, and a mass of 35 ± 4 M⊕. This results in a density of 0.86 ± 0.25 g cm-3. TOI-2498 b resides on the edge of the Neptune desert; a region of mass-period parameter space in which there appears to be a dearth of planets. Therefore TOI-2498 b is an interesting case to study to further understand the origins and boundaries of the Neptune desert. Through modelling the evaporation history, we determine that over its ∼3.6 Gyr lifespan, TOI-2498 b has likely reduced from a Saturn-sized planet to its current radius through photoevaporation. Moreover, TOI-2498 b is a potential candidate for future atmospheric studies searching for species like water or sodium in the optical using high resolution spectroscopy, and for carbon-based molecules in the infrared using JWST.

Original language	English (US)
Pages (from-to)	1163-1174
Number of pages	12
Journal	Monthly Notices of the Royal Astronomical Society
Volume	523
Issue number	1
DOIs	https://doi.org/10.1093/mnras/stad1452
State	Published - Jul 1 2023

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

planets and satellites: detection
stars: individual: TOI-2498 (TIC-263179590)
techniques: photometric
techniques: radial velocities

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10.1093/mnras/stad1452

Cite this

Frame, G., Armstrong, D. J., Cegla, H. M., Fernández, J. F., Osborn, A., Adibekyan, V., Collins, K. A., Mena, E. D., Giacalone, S., Kielkopf, J. F., Santos, N. C., Sousa, S. G., Stassun, K. G., Ziegler, C., Anderson, D. R., Barros, S. C. C., Bayliss, D., Briceno, C., Conti, D. M., ... Wheatley, P. J. (2023). TOI-2498 b: a hot bloated super-Neptune within the Neptune desert. Monthly Notices of the Royal Astronomical Society, 523(1), 1163-1174. https://doi.org/10.1093/mnras/stad1452

@article{b474f9890ff64e99a82780c14648f3f6,

title = "TOI-2498 b: a hot bloated super-Neptune within the Neptune desert",

abstract = "We present the discovery and confirmation of a transiting hot bloated super-Neptune using photometry from the Transiting Exoplanet Survey Satellite (TESS) and the Las Cumbres Observatory Global Telescope (LCOGT) and radial velocity measurements from the High Accuracy Radial velocity Planet Searcher (HARPS). The host star TOI-2498 is a V = 11.2, G-type (Teff = 5905 ± 12 K) solar-like star with a mass of 1.12 ± 0.02 M⊙ and a radius of 1.26 ± 0.04 R⊙. The planet, TOI-2498 b, orbits the star with a period of 3.7 d, has a radius of 6.1 ± 0.3 R⊕, and a mass of 35 ± 4 M⊕. This results in a density of 0.86 ± 0.25 g cm-3. TOI-2498 b resides on the edge of the Neptune desert; a region of mass-period parameter space in which there appears to be a dearth of planets. Therefore TOI-2498 b is an interesting case to study to further understand the origins and boundaries of the Neptune desert. Through modelling the evaporation history, we determine that over its ∼3.6 Gyr lifespan, TOI-2498 b has likely reduced from a Saturn-sized planet to its current radius through photoevaporation. Moreover, TOI-2498 b is a potential candidate for future atmospheric studies searching for species like water or sodium in the optical using high resolution spectroscopy, and for carbon-based molecules in the infrared using JWST.",

keywords = "planets and satellites: detection, stars: individual: TOI-2498 (TIC-263179590), techniques: photometric, techniques: radial velocities",

author = "Ginger Frame and Armstrong, {David J.} and Cegla, {Heather M.} and Fern{\'a}ndez, {Jorge Fern{\'a}ndez} and Ares Osborn and Vardan Adibekyan and Collins, {Karen A.} and Mena, {Elisa Delgado} and Steven Giacalone and Kielkopf, {John F.} and Santos, {Nuno C.} and Sousa, {Sergio G.} and Stassun, {Keivan G.} and Carl Ziegler and Anderson, {David R.} and Barros, {Susana C.C.} and Daniel Bayliss and Cesar Briceno and Conti, {Dennis M.} and Dressing, {Courtney D.} and Xavier Dumusque and Pedro Figueira and William Fong and Samuel Gill and Faith Hawthorn and Jenkins, {Jon M.} and Jensen, {Eric L.N.} and Keniger, {Marcelo Aron F.} and Latham, {David W.} and Nicholas Law and Lissauer, {Jack J.} and Mann, {Andrew W.} and Nielsen, {Louise D.} and Hugh Osborn and Martin Paegert and Sara Seager and Schwarz, {Richard P.} and Avi Shporer and Gregor Srdoc and Str{\o}m, {Paul A.} and Winn, {Joshua N.} and Wheatley, {Peter J.}",

note = "Publisher Copyright: {\textcopyright} 2023 The Author(s).",

year = "2023",

month = jul,

day = "1",

doi = "10.1093/mnras/stad1452",

language = "English (US)",

volume = "523",

pages = "1163--1174",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "1",

}

Frame, G, Armstrong, DJ, Cegla, HM, Fernández, JF, Osborn, A, Adibekyan, V, Collins, KA, Mena, ED, Giacalone, S, Kielkopf, JF, Santos, NC, Sousa, SG, Stassun, KG, Ziegler, C, Anderson, DR, Barros, SCC, Bayliss, D, Briceno, C, Conti, DM, Dressing, CD, Dumusque, X, Figueira, P, Fong, W, Gill, S, Hawthorn, F, Jenkins, JM, Jensen, ELN, Keniger, MAF, Latham, DW, Law, N, Lissauer, JJ, Mann, AW, Nielsen, LD, Osborn, H, Paegert, M, Seager, S, Schwarz, RP, Shporer, A, Srdoc, G, Strøm, PA, Winn, JN & Wheatley, PJ 2023, 'TOI-2498 b: a hot bloated super-Neptune within the Neptune desert', Monthly Notices of the Royal Astronomical Society, vol. 523, no. 1, pp. 1163-1174. https://doi.org/10.1093/mnras/stad1452

TY - JOUR

T1 - TOI-2498 b

T2 - a hot bloated super-Neptune within the Neptune desert

AU - Frame, Ginger

AU - Armstrong, David J.

AU - Cegla, Heather M.

AU - Fernández, Jorge Fernández

AU - Osborn, Ares

AU - Adibekyan, Vardan

AU - Collins, Karen A.

AU - Mena, Elisa Delgado

AU - Giacalone, Steven

AU - Kielkopf, John F.

AU - Santos, Nuno C.

AU - Sousa, Sergio G.

AU - Stassun, Keivan G.

AU - Ziegler, Carl

AU - Anderson, David R.

AU - Barros, Susana C.C.

AU - Bayliss, Daniel

AU - Briceno, Cesar

AU - Conti, Dennis M.

AU - Dressing, Courtney D.

AU - Dumusque, Xavier

AU - Figueira, Pedro

AU - Fong, William

AU - Gill, Samuel

AU - Hawthorn, Faith

AU - Jenkins, Jon M.

AU - Jensen, Eric L.N.

AU - Keniger, Marcelo Aron F.

AU - Latham, David W.

AU - Law, Nicholas

AU - Lissauer, Jack J.

AU - Mann, Andrew W.

AU - Nielsen, Louise D.

AU - Osborn, Hugh

AU - Paegert, Martin

AU - Seager, Sara

AU - Schwarz, Richard P.

AU - Shporer, Avi

AU - Srdoc, Gregor

AU - Strøm, Paul A.

AU - Winn, Joshua N.

AU - Wheatley, Peter J.

PY - 2023/7/1

Y1 - 2023/7/1

N2 - We present the discovery and confirmation of a transiting hot bloated super-Neptune using photometry from the Transiting Exoplanet Survey Satellite (TESS) and the Las Cumbres Observatory Global Telescope (LCOGT) and radial velocity measurements from the High Accuracy Radial velocity Planet Searcher (HARPS). The host star TOI-2498 is a V = 11.2, G-type (Teff = 5905 ± 12 K) solar-like star with a mass of 1.12 ± 0.02 M⊙ and a radius of 1.26 ± 0.04 R⊙. The planet, TOI-2498 b, orbits the star with a period of 3.7 d, has a radius of 6.1 ± 0.3 R⊕, and a mass of 35 ± 4 M⊕. This results in a density of 0.86 ± 0.25 g cm-3. TOI-2498 b resides on the edge of the Neptune desert; a region of mass-period parameter space in which there appears to be a dearth of planets. Therefore TOI-2498 b is an interesting case to study to further understand the origins and boundaries of the Neptune desert. Through modelling the evaporation history, we determine that over its ∼3.6 Gyr lifespan, TOI-2498 b has likely reduced from a Saturn-sized planet to its current radius through photoevaporation. Moreover, TOI-2498 b is a potential candidate for future atmospheric studies searching for species like water or sodium in the optical using high resolution spectroscopy, and for carbon-based molecules in the infrared using JWST.

AB - We present the discovery and confirmation of a transiting hot bloated super-Neptune using photometry from the Transiting Exoplanet Survey Satellite (TESS) and the Las Cumbres Observatory Global Telescope (LCOGT) and radial velocity measurements from the High Accuracy Radial velocity Planet Searcher (HARPS). The host star TOI-2498 is a V = 11.2, G-type (Teff = 5905 ± 12 K) solar-like star with a mass of 1.12 ± 0.02 M⊙ and a radius of 1.26 ± 0.04 R⊙. The planet, TOI-2498 b, orbits the star with a period of 3.7 d, has a radius of 6.1 ± 0.3 R⊕, and a mass of 35 ± 4 M⊕. This results in a density of 0.86 ± 0.25 g cm-3. TOI-2498 b resides on the edge of the Neptune desert; a region of mass-period parameter space in which there appears to be a dearth of planets. Therefore TOI-2498 b is an interesting case to study to further understand the origins and boundaries of the Neptune desert. Through modelling the evaporation history, we determine that over its ∼3.6 Gyr lifespan, TOI-2498 b has likely reduced from a Saturn-sized planet to its current radius through photoevaporation. Moreover, TOI-2498 b is a potential candidate for future atmospheric studies searching for species like water or sodium in the optical using high resolution spectroscopy, and for carbon-based molecules in the infrared using JWST.

KW - planets and satellites: detection

KW - stars: individual: TOI-2498 (TIC-263179590)

KW - techniques: photometric

KW - techniques: radial velocities

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U2 - 10.1093/mnras/stad1452

DO - 10.1093/mnras/stad1452

M3 - Article

AN - SCOPUS:85162165339

SN - 0035-8711

VL - 523

SP - 1163

EP - 1174

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

TOI-2498 b: a hot bloated super-Neptune within the Neptune desert

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Keywords

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