A Super-Earth and Sub-Neptune Transiting the Late-type M Dwarf LP 791-18

Ian J.M. Crossfield; William Waalkes; Elisabeth R. Newton; Norio Narita; Philip Muirhead; Kristo Ment; Elisabeth Matthews; Adam Kraus; Veselin Kostov; Molly R. Kosiarek; Stephen R. Kane; Howard Isaacson; Sam Halverson; Erica Gonzales; Mark Everett; Diana Dragomir; Karen A. Collins; Ashley Chontos; David Berardo; Jennifer G. Winters; Joshua N. Winn; Nicholas J. Scott; Barbara Rojas-Ayala; Aaron C. Rizzuto; Erik A. Petigura; Merrin Peterson; Teo Mocnik; Thomas Mikal-Evans; Nicholas Mehrle; Rachel Matson; Masayuki Kuzuhara; Jonathan Irwin; Daniel Huber; Chelsea Huang; Steve Howell; Andrew W. Howard; Teruyuki Hirano; Benjamin J. Fulton; Trent Dupuy; Courtney D. Dressing; Paul A. Dalba; David Charbonneau; Jennifer Burt; Zachory Berta-Thompson; Björn Benneke; Noriharu Watanabe; Joseph D. Twicken; Motohide Tamura; Joshua Schlieder; S. Seager; Mark E. Rose; George Ricker; Elisa Quintana; Sébastien Lépine; David W. Latham; Takayuki Kotani; Jon M. Jenkins; Yasunori Hori; Knicole Colon; Douglas A. Caldwell

doi:10.3847/2041-8213/ab3d30

A Super-Earth and Sub-Neptune Transiting the Late-type M Dwarf LP 791-18

Ian J.M. Crossfield
, William Waalkes
, Elisabeth R. Newton
, Norio Narita
, Philip Muirhead
, Kristo Ment
, Elisabeth Matthews
, Adam Kraus
, Veselin Kostov
, Molly R. Kosiarek
, Stephen R. Kane
, Howard Isaacson
, Sam Halverson
, Erica Gonzales
, Mark Everett
, Diana Dragomir
, Karen A. Collins
, Ashley Chontos
, David Berardo
, Jennifer G. Winters

Joshua N. Winn, Nicholas J. Scott, Barbara Rojas-Ayala, Aaron C. Rizzuto, Erik A. Petigura, Merrin Peterson, Teo Mocnik, Thomas Mikal-Evans, Nicholas Mehrle, Rachel Matson, Masayuki Kuzuhara, Jonathan Irwin, Daniel Huber, Chelsea Huang, Steve Howell, Andrew W. Howard, Teruyuki Hirano, Benjamin J. Fulton, Trent Dupuy, Courtney D. Dressing, Paul A. Dalba, David Charbonneau, Jennifer Burt, Zachory Berta-Thompson, Björn Benneke, Noriharu Watanabe, Joseph D. Twicken, Motohide Tamura, Joshua Schlieder, S. Seager, Mark E. Rose, George Ricker, Elisa Quintana, Sébastien Lépine, David W. Latham, Takayuki Kotani, Jon M. Jenkins, Yasunori Hori, Knicole Colon, Douglas A. Caldwell

Massachusetts Institute of Technology
University of Colorado Boulder
Dartmouth College
National Institutes of Natural Sciences - AstroBiology Center
Japan Science and Technology Agency
National Institutes of Natural Sciences - National Astronomical Observatory of Japan
Instituto de Astrofísica de Canarias
Boston University
Harvard-Smithsonian Center for Astrophysics
University of Texas at Austin
NASA Goddard Space Flight Center
University of California at Santa Cruz
University of California at Riverside
University of California at Berkeley
University of Southern Queensland
National Optical Astronomy Observatory
University of Hawai'i at Mānoa
Princeton University
NASA Ames Research Center
Universidad Andrés Bello
California Institute of Technology
University of Montreal
Institute of Science Tokyo
Gemini Observatory
The Graduate University for Advanced Studies
SETI Institute
The University of Tokyo
Georgia State University

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54 Citas (Scopus)

Resumen

Planets occur most frequently around cool dwarfs, but only a handful of specific examples are known to orbit the latest-type M stars. Using TESS photometry, we report the discovery of two planets transiting the low-mass star called LP 791-18 (identified by TESS as TOI 736). This star has spectral type M6V, effective temperature 2960 K, and radius 0.17 R _o, making it the third-coolest star known to host planets. The two planets straddle the radius gap seen for smaller exoplanets; they include a 1.1R _⊕ planet on a 0.95 day orbit and a 2.3R _⊕ planet on a 5 day orbit. Because the host star is small the decrease in light during these planets' transits is fairly large (0.4% and 1.7%). This has allowed us to detect both planets' transits from ground-based photometry, refining their radii and orbital ephemerides. In the future, radial velocity observations and transmission spectroscopy can both probe these planets' bulk interior and atmospheric compositions, and additional photometric monitoring would be sensitive to even smaller transiting planets.

Idioma original	Inglés
Número de artículo	L16
Publicación	Astrophysical Journal Letters
Volumen	883
N.º	1
DOI	https://doi.org/10.3847/2041-8213/ab3d30
Estado	Publicada - 20 sept 2019
Publicado de forma externa	Sí

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Crossfield, I. J. M., Waalkes, W., Newton, E. R., Narita, N., Muirhead, P., Ment, K., Matthews, E., Kraus, A., Kostov, V., Kosiarek, M. R., Kane, S. R., Isaacson, H., Halverson, S., Gonzales, E., Everett, M., Dragomir, D., Collins, K. A., Chontos, A., Berardo, D., ... Caldwell, D. A. (2019). A Super-Earth and Sub-Neptune Transiting the Late-type M Dwarf LP 791-18. Astrophysical Journal Letters, 883(1), Artículo L16. https://doi.org/10.3847/2041-8213/ab3d30

@article{0b0f2d357d0548e7a967ff3d3b0245ae,

title = "A Super-Earth and Sub-Neptune Transiting the Late-type M Dwarf LP 791-18",

abstract = "Planets occur most frequently around cool dwarfs, but only a handful of specific examples are known to orbit the latest-type M stars. Using TESS photometry, we report the discovery of two planets transiting the low-mass star called LP 791-18 (identified by TESS as TOI 736). This star has spectral type M6V, effective temperature 2960 K, and radius 0.17 R o, making it the third-coolest star known to host planets. The two planets straddle the radius gap seen for smaller exoplanets; they include a 1.1R ⊕ planet on a 0.95 day orbit and a 2.3R ⊕ planet on a 5 day orbit. Because the host star is small the decrease in light during these planets' transits is fairly large (0.4\% and 1.7\%). This has allowed us to detect both planets' transits from ground-based photometry, refining their radii and orbital ephemerides. In the future, radial velocity observations and transmission spectroscopy can both probe these planets' bulk interior and atmospheric compositions, and additional photometric monitoring would be sensitive to even smaller transiting planets.",

author = "Crossfield, \{Ian J.M.\} and William Waalkes and Newton, \{Elisabeth R.\} and Norio Narita and Philip Muirhead and Kristo Ment and Elisabeth Matthews and Adam Kraus and Veselin Kostov and Kosiarek, \{Molly R.\} and Kane, \{Stephen R.\} and Howard Isaacson and Sam Halverson and Erica Gonzales and Mark Everett and Diana Dragomir and Collins, \{Karen A.\} and Ashley Chontos and David Berardo and Winters, \{Jennifer G.\} and Winn, \{Joshua N.\} and Scott, \{Nicholas J.\} and Barbara Rojas-Ayala and Rizzuto, \{Aaron C.\} and Petigura, \{Erik A.\} and Merrin Peterson and Teo Mocnik and Thomas Mikal-Evans and Nicholas Mehrle and Rachel Matson and Masayuki Kuzuhara and Jonathan Irwin and Daniel Huber and Chelsea Huang and Steve Howell and Howard, \{Andrew W.\} and Teruyuki Hirano and Fulton, \{Benjamin J.\} and Trent Dupuy and Dressing, \{Courtney D.\} and Dalba, \{Paul A.\} and David Charbonneau and Jennifer Burt and Zachory Berta-Thompson and Bj{\"o}rn Benneke and Noriharu Watanabe and Twicken, \{Joseph D.\} and Motohide Tamura and Joshua Schlieder and S. Seager and Rose, \{Mark E.\} and George Ricker and Elisa Quintana and S{\'e}bastien L{\'e}pine and Latham, \{David W.\} and Takayuki Kotani and Jenkins, \{Jon M.\} and Yasunori Hori and Knicole Colon and Caldwell, \{Douglas A.\}",

note = "Publisher Copyright: {\textcopyright} 2019. The American Astronomical Society.",

year = "2019",

month = sep,

day = "20",

doi = "10.3847/2041-8213/ab3d30",

language = "English",

volume = "883",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

number = "1",

}

Crossfield, IJM, Waalkes, W, Newton, ER, Narita, N, Muirhead, P, Ment, K, Matthews, E, Kraus, A, Kostov, V, Kosiarek, MR, Kane, SR, Isaacson, H, Halverson, S, Gonzales, E, Everett, M, Dragomir, D, Collins, KA, Chontos, A, Berardo, D, Winters, JG, Winn, JN, Scott, NJ, Rojas-Ayala, B, Rizzuto, AC, Petigura, EA, Peterson, M, Mocnik, T, Mikal-Evans, T, Mehrle, N, Matson, R, Kuzuhara, M, Irwin, J, Huber, D, Huang, C, Howell, S, Howard, AW, Hirano, T, Fulton, BJ, Dupuy, T, Dressing, CD, Dalba, PA, Charbonneau, D, Burt, J, Berta-Thompson, Z, Benneke, B, Watanabe, N, Twicken, JD, Tamura, M, Schlieder, J, Seager, S, Rose, ME, Ricker, G, Quintana, E, Lépine, S, Latham, DW, Kotani, T, Jenkins, JM, Hori, Y, Colon, K & Caldwell, DA 2019, 'A Super-Earth and Sub-Neptune Transiting the Late-type M Dwarf LP 791-18', Astrophysical Journal Letters, vol. 883, n.º 1, L16. https://doi.org/10.3847/2041-8213/ab3d30

TY - JOUR

T1 - A Super-Earth and Sub-Neptune Transiting the Late-type M Dwarf LP 791-18

AU - Crossfield, Ian J.M.

AU - Waalkes, William

AU - Newton, Elisabeth R.

AU - Narita, Norio

AU - Muirhead, Philip

AU - Ment, Kristo

AU - Matthews, Elisabeth

AU - Kraus, Adam

AU - Kostov, Veselin

AU - Kosiarek, Molly R.

AU - Kane, Stephen R.

AU - Isaacson, Howard

AU - Halverson, Sam

AU - Gonzales, Erica

AU - Everett, Mark

AU - Dragomir, Diana

AU - Collins, Karen A.

AU - Chontos, Ashley

AU - Berardo, David

AU - Winters, Jennifer G.

AU - Winn, Joshua N.

AU - Scott, Nicholas J.

AU - Rojas-Ayala, Barbara

AU - Rizzuto, Aaron C.

AU - Petigura, Erik A.

AU - Peterson, Merrin

AU - Mocnik, Teo

AU - Mikal-Evans, Thomas

AU - Mehrle, Nicholas

AU - Matson, Rachel

AU - Kuzuhara, Masayuki

AU - Irwin, Jonathan

AU - Huber, Daniel

AU - Huang, Chelsea

AU - Howell, Steve

AU - Howard, Andrew W.

AU - Hirano, Teruyuki

AU - Fulton, Benjamin J.

AU - Dupuy, Trent

AU - Dressing, Courtney D.

AU - Dalba, Paul A.

AU - Charbonneau, David

AU - Burt, Jennifer

AU - Berta-Thompson, Zachory

AU - Benneke, Björn

AU - Watanabe, Noriharu

AU - Twicken, Joseph D.

AU - Tamura, Motohide

AU - Schlieder, Joshua

AU - Seager, S.

AU - Rose, Mark E.

AU - Ricker, George

AU - Quintana, Elisa

AU - Lépine, Sébastien

AU - Latham, David W.

AU - Kotani, Takayuki

AU - Jenkins, Jon M.

AU - Hori, Yasunori

AU - Colon, Knicole

AU - Caldwell, Douglas A.

PY - 2019/9/20

Y1 - 2019/9/20

N2 - Planets occur most frequently around cool dwarfs, but only a handful of specific examples are known to orbit the latest-type M stars. Using TESS photometry, we report the discovery of two planets transiting the low-mass star called LP 791-18 (identified by TESS as TOI 736). This star has spectral type M6V, effective temperature 2960 K, and radius 0.17 R o, making it the third-coolest star known to host planets. The two planets straddle the radius gap seen for smaller exoplanets; they include a 1.1R ⊕ planet on a 0.95 day orbit and a 2.3R ⊕ planet on a 5 day orbit. Because the host star is small the decrease in light during these planets' transits is fairly large (0.4% and 1.7%). This has allowed us to detect both planets' transits from ground-based photometry, refining their radii and orbital ephemerides. In the future, radial velocity observations and transmission spectroscopy can both probe these planets' bulk interior and atmospheric compositions, and additional photometric monitoring would be sensitive to even smaller transiting planets.

AB - Planets occur most frequently around cool dwarfs, but only a handful of specific examples are known to orbit the latest-type M stars. Using TESS photometry, we report the discovery of two planets transiting the low-mass star called LP 791-18 (identified by TESS as TOI 736). This star has spectral type M6V, effective temperature 2960 K, and radius 0.17 R o, making it the third-coolest star known to host planets. The two planets straddle the radius gap seen for smaller exoplanets; they include a 1.1R ⊕ planet on a 0.95 day orbit and a 2.3R ⊕ planet on a 5 day orbit. Because the host star is small the decrease in light during these planets' transits is fairly large (0.4% and 1.7%). This has allowed us to detect both planets' transits from ground-based photometry, refining their radii and orbital ephemerides. In the future, radial velocity observations and transmission spectroscopy can both probe these planets' bulk interior and atmospheric compositions, and additional photometric monitoring would be sensitive to even smaller transiting planets.

UR - https://www.scopus.com/pages/publications/85073064066

U2 - 10.3847/2041-8213/ab3d30

DO - 10.3847/2041-8213/ab3d30

M3 - Article

AN - SCOPUS:85073064066

SN - 2041-8205

VL - 883

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L16

ER -

A Super-Earth and Sub-Neptune Transiting the Late-type M Dwarf LP 791-18

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