A Hot Mars-sized Exoplanet transiting an M dwarf

Caleb I. Cañas; Suvrath Mahadevan; William D. Cochran; Chad F. Bender; Eric D. Feigelson; C. E. Harman; Ravi Kumar Kopparapu; Gabriel A. Caceres; Scott A. Diddams; Michael Endl; Eric B. Ford; Samuel Halverson; Fred Hearty; Sinclaire Jones; Shubham Kanodia; Andrea S. J. Lin; Andrew J. Metcalf; Andrew Monson; Joe P. Ninan; Lawrence W. Ramsey; Paul Robertson; Arpita Roy; Christian Schwab; Guđmundur Stefánsson

doi:10.3847/1538-3881/ac3088

A Hot Mars-sized Exoplanet transiting an M dwarf

Caleb I. Cañas^*, Suvrath Mahadevan, William D. Cochran, Chad F. Bender, Eric D. Feigelson, C. E. Harman, Ravi Kumar Kopparapu, Gabriel A. Caceres, Scott A. Diddams, Michael Endl, Eric B. Ford, Samuel Halverson, Fred Hearty, Sinclaire Jones, Shubham Kanodia, Andrea S. J. Lin, Andrew J. Metcalf, Andrew Monson, Joe P. Ninan, Lawrence W. RamseyPaul Robertson, Arpita Roy, Christian Schwab, Guđmundur Stefánsson

^*Corresponding author for this work

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

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Abstract

We validate the planetary nature of an ultra-short-period planet orbiting the M dwarf KOI-4777. We use a combination of space-based photometry from Kepler, high-precision, near-infrared Doppler spectroscopy from the Habitable-zone Planet Finder, and adaptive optics imaging to characterize this system. KOI-4777.01 is a Mars-sized exoplanet (Rp = 0.51 ± 0.03R_⊕) orbiting the host star every 0.412 days (∼9.9 hr). This is the smallest validated ultra-short period planet known and we see no evidence for additional massive companions using our HPF RVs. We constrain the upper 3σ mass to M_p < 0.34 M_⊕ by assuming the planet is less dense than iron. Obtaining a mass measurement for KOI-4777.01 is beyond current instrumental capabilities.

Original language	English
Article number	3
Pages (from-to)	1-15
Number of pages	15
Journal	Astronomical Journal
Volume	163
Issue number	1
DOIs	https://doi.org/10.3847/1538-3881/ac3088
Publication status	Published - 1 Jan 2022

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Copyright © 2021. The Author(s). Published by the American Astronomical Society. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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Cañas, C. I., Mahadevan, S., Cochran, W. D., Bender, C. F., Feigelson, E. D., Harman, C. E., Kopparapu, R. K., Caceres, G. A., Diddams, S. A., Endl, M., Ford, E. B., Halverson, S., Hearty, F., Jones, S., Kanodia, S., Lin, A. S. J., Metcalf, A. J., Monson, A., Ninan, J. P., ... Stefánsson, G. (2022). A Hot Mars-sized Exoplanet transiting an M dwarf. Astronomical Journal, 163(1), 1-15. Article 3. https://doi.org/10.3847/1538-3881/ac3088

@article{2021a68093264cd48271ae14c40f4527,

title = "A Hot Mars-sized Exoplanet transiting an M dwarf",

abstract = "We validate the planetary nature of an ultra-short-period planet orbiting the M dwarf KOI-4777. We use a combination of space-based photometry from Kepler, high-precision, near-infrared Doppler spectroscopy from the Habitable-zone Planet Finder, and adaptive optics imaging to characterize this system. KOI-4777.01 is a Mars-sized exoplanet (Rp = 0.51 ± 0.03R⊕) orbiting the host star every 0.412 days (∼9.9 hr). This is the smallest validated ultra-short period planet known and we see no evidence for additional massive companions using our HPF RVs. We constrain the upper 3σ mass to Mp < 0.34 M⊕ by assuming the planet is less dense than iron. Obtaining a mass measurement for KOI-4777.01 is beyond current instrumental capabilities.",

author = "Ca{\~n}as, \{Caleb I.\} and Suvrath Mahadevan and Cochran, \{William D.\} and Bender, \{Chad F.\} and Feigelson, \{Eric D.\} and Harman, \{C. E.\} and Kopparapu, \{Ravi Kumar\} and Caceres, \{Gabriel A.\} and Diddams, \{Scott A.\} and Michael Endl and Ford, \{Eric B.\} and Samuel Halverson and Fred Hearty and Sinclaire Jones and Shubham Kanodia and Lin, \{Andrea S. J.\} and Metcalf, \{Andrew J.\} and Andrew Monson and Ninan, \{Joe P.\} and Ramsey, \{Lawrence W.\} and Paul Robertson and Arpita Roy and Christian Schwab and Gu{\d}mundur Stef{\'a}nsson",

note = "Copyright {\textcopyright} 2021. The Author(s). Published by the American Astronomical Society. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.",

year = "2022",

month = jan,

day = "1",

doi = "10.3847/1538-3881/ac3088",

language = "English",

volume = "163",

pages = "1--15",

journal = "Astronomical Journal",

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Cañas, CI, Mahadevan, S, Cochran, WD, Bender, CF, Feigelson, ED, Harman, CE, Kopparapu, RK, Caceres, GA, Diddams, SA, Endl, M, Ford, EB, Halverson, S, Hearty, F, Jones, S, Kanodia, S, Lin, ASJ, Metcalf, AJ, Monson, A, Ninan, JP, Ramsey, LW, Robertson, P, Roy, A, Schwab, C & Stefánsson, G 2022, 'A Hot Mars-sized Exoplanet transiting an M dwarf', Astronomical Journal, vol. 163, no. 1, 3, pp. 1-15. https://doi.org/10.3847/1538-3881/ac3088

TY - JOUR

T1 - A Hot Mars-sized Exoplanet transiting an M dwarf

AU - Cañas, Caleb I.

AU - Mahadevan, Suvrath

AU - Cochran, William D.

AU - Bender, Chad F.

AU - Feigelson, Eric D.

AU - Harman, C. E.

AU - Kopparapu, Ravi Kumar

AU - Caceres, Gabriel A.

AU - Diddams, Scott A.

AU - Endl, Michael

AU - Ford, Eric B.

AU - Halverson, Samuel

AU - Hearty, Fred

AU - Jones, Sinclaire

AU - Kanodia, Shubham

AU - Lin, Andrea S. J.

AU - Metcalf, Andrew J.

AU - Monson, Andrew

AU - Ninan, Joe P.

AU - Ramsey, Lawrence W.

AU - Robertson, Paul

AU - Roy, Arpita

AU - Schwab, Christian

AU - Stefánsson, Guđmundur

N1 - Copyright © 2021. The Author(s). Published by the American Astronomical Society. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2022/1/1

Y1 - 2022/1/1

N2 - We validate the planetary nature of an ultra-short-period planet orbiting the M dwarf KOI-4777. We use a combination of space-based photometry from Kepler, high-precision, near-infrared Doppler spectroscopy from the Habitable-zone Planet Finder, and adaptive optics imaging to characterize this system. KOI-4777.01 is a Mars-sized exoplanet (Rp = 0.51 ± 0.03R⊕) orbiting the host star every 0.412 days (∼9.9 hr). This is the smallest validated ultra-short period planet known and we see no evidence for additional massive companions using our HPF RVs. We constrain the upper 3σ mass to Mp < 0.34 M⊕ by assuming the planet is less dense than iron. Obtaining a mass measurement for KOI-4777.01 is beyond current instrumental capabilities.

AB - We validate the planetary nature of an ultra-short-period planet orbiting the M dwarf KOI-4777. We use a combination of space-based photometry from Kepler, high-precision, near-infrared Doppler spectroscopy from the Habitable-zone Planet Finder, and adaptive optics imaging to characterize this system. KOI-4777.01 is a Mars-sized exoplanet (Rp = 0.51 ± 0.03R⊕) orbiting the host star every 0.412 days (∼9.9 hr). This is the smallest validated ultra-short period planet known and we see no evidence for additional massive companions using our HPF RVs. We constrain the upper 3σ mass to Mp < 0.34 M⊕ by assuming the planet is less dense than iron. Obtaining a mass measurement for KOI-4777.01 is beyond current instrumental capabilities.

UR - https://www.scopus.com/pages/publications/85122618043

U2 - 10.3847/1538-3881/ac3088

DO - 10.3847/1538-3881/ac3088

M3 - Article

AN - SCOPUS:85122618043

SN - 0004-6256

VL - 163

SP - 1

EP - 15

JO - Astronomical Journal

JF - Astronomical Journal

IS - 1

M1 - 3

ER -

A Hot Mars-sized Exoplanet transiting an M dwarf

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