LHS 1815b: The First Thick-disk Planet Detected by TESS

Tianjun Gan; Avi Shporer; John H. Livingston; Karen A. Collins; Shude Mao; Alessandro A. Trani; Davide Gandolfi; Teruyuki Hirano; Rafael Luque; Keivan G. Stassun; Carl Ziegler; Steve B. Howell; Coel Hellier; Jonathan M. Irwin; Jennifer G. Winters; David R. Anderson; César Brice&ntilde;o; Nicholas Law; Andrew W. Mann; Xavier Bonfils; Nicola Astudillo-Defru; Eric L.N. Jensen; Guillem Anglada-Escudé; George R. Ricker; Roland Vanderspek; David W. Latham; Sara Seager; Joshua N. Winn; Jon M. Jenkins; Gabor Furesz; Natalia M. Guerrero; Elisa Quintana; Joseph D. Twicken; Douglas A. Caldwell; Peter Tenenbaum; Chelsea X. Huang; Pamela Rowden; Bárbara Rojas-Ayala

doi:10.3847/1538-3881/ab775a

LHS 1815b: The First Thick-disk Planet Detected by TESS

Tianjun Gan, Avi Shporer, John H. Livingston, Karen A. Collins, Shude Mao, Alessandro A. Trani, Davide Gandolfi, Teruyuki Hirano, Rafael Luque, Keivan G. Stassun, Carl Ziegler, Steve B. Howell, Coel Hellier, Jonathan M. Irwin, Jennifer G. Winters, David R. Anderson, César Briceño, Nicholas Law, Andrew W. Mann, Xavier BonfilsNicola Astudillo-Defru, Eric L.N. Jensen, Guillem Anglada-Escudé, George R. Ricker, Roland Vanderspek, David W. Latham, Sara Seager, Joshua N. Winn, Jon M. Jenkins, Gabor Furesz, Natalia M. Guerrero, Elisa Quintana, Joseph D. Twicken, Douglas A. Caldwell, Peter Tenenbaum, Chelsea X. Huang, Pamela Rowden, Bárbara Rojas-Ayala

Astrophysical Sciences

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Abstract

We report the first discovery of a thick-disk planet, LHS 1815b (TOI-704b, TIC 260004324), detected in the Transiting Exoplanet Survey Satellite (TESS) survey. LHS 1815b transits a bright (V = 12.19 mag, K = 7.99 mag) and quiet M dwarf located 29.87 ± 0.02 pc away with a mass of 0.502 ± 0.015 M _o&dot; and a radius of 0.501 ± 0.030 R _o&dot;. We validate the planet by combining space- and ground-based photometry, spectroscopy, and imaging. The planet has a radius of 1.088 ± 0.064 R _⊕ with a 3σ mass upper limit of 8.7 M _⊕. We analyze the galactic kinematics and orbit of the host star LHS 1815 and find that it has a large probability (P _thick/P _thin = 6482) to be in the thick disk with a much higher expected maximal height (Z _max = 1.8 kpc) above the Galactic plane compared with other TESS planet host stars. Future studies of the interior structure and atmospheric properties of planets in such systems using, for example, the upcoming James Webb Space Telescope, can investigate the differences in formation efficiency and evolution for planetary systems between different Galactic components (thick disks, thin disks, and halo).

Original language	English (US)
Article number	160
Journal	Astronomical Journal
Volume	159
Issue number	4
DOIs	https://doi.org/10.3847/1538-3881/ab775a
State	Published - Apr 2020

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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Gan, T., Shporer, A., Livingston, J. H., Collins, K. A., Mao, S., Trani, A. A., Gandolfi, D., Hirano, T., Luque, R., Stassun, K. G., Ziegler, C., Howell, S. B., Hellier, C., Irwin, J. M., Winters, J. G., Anderson, D. R., Briceño, C., Law, N., Mann, A. W., ... Rojas-Ayala, B. (2020). LHS 1815b: The First Thick-disk Planet Detected by TESS. Astronomical Journal, 159(4), Article 160. https://doi.org/10.3847/1538-3881/ab775a

@article{8aeabfef03fc4bb2b37a4ef4c7608419,

title = "LHS 1815b: The First Thick-disk Planet Detected by TESS",

abstract = "We report the first discovery of a thick-disk planet, LHS 1815b (TOI-704b, TIC 260004324), detected in the Transiting Exoplanet Survey Satellite (TESS) survey. LHS 1815b transits a bright (V = 12.19 mag, K = 7.99 mag) and quiet M dwarf located 29.87 ± 0.02 pc away with a mass of 0.502 ± 0.015 M o&dot; and a radius of 0.501 ± 0.030 R o&dot;. We validate the planet by combining space- and ground-based photometry, spectroscopy, and imaging. The planet has a radius of 1.088 ± 0.064 R ⊕ with a 3σ mass upper limit of 8.7 M ⊕. We analyze the galactic kinematics and orbit of the host star LHS 1815 and find that it has a large probability (P thick/P thin = 6482) to be in the thick disk with a much higher expected maximal height (Z max = 1.8 kpc) above the Galactic plane compared with other TESS planet host stars. Future studies of the interior structure and atmospheric properties of planets in such systems using, for example, the upcoming James Webb Space Telescope, can investigate the differences in formation efficiency and evolution for planetary systems between different Galactic components (thick disks, thin disks, and halo).",

author = "Tianjun Gan and Avi Shporer and Livingston, {John H.} and Collins, {Karen A.} and Shude Mao and Trani, {Alessandro A.} and Davide Gandolfi and Teruyuki Hirano and Rafael Luque and Stassun, {Keivan G.} and Carl Ziegler and Howell, {Steve B.} and Coel Hellier and Irwin, {Jonathan M.} and Winters, {Jennifer G.} and Anderson, {David R.} and C{\'e}sar Briceño and Nicholas Law and Mann, {Andrew W.} and Xavier Bonfils and Nicola Astudillo-Defru and Jensen, {Eric L.N.} and Guillem Anglada-Escud{\'e} and Ricker, {George R.} and Roland Vanderspek and Latham, {David W.} and Sara Seager and Winn, {Joshua N.} and Jenkins, {Jon M.} and Gabor Furesz and Guerrero, {Natalia M.} and Elisa Quintana and Twicken, {Joseph D.} and Caldwell, {Douglas A.} and Peter Tenenbaum and Huang, {Chelsea X.} and Pamela Rowden and B{\'a}rbara Rojas-Ayala",

year = "2020",

month = apr,

doi = "10.3847/1538-3881/ab775a",

language = "English (US)",

volume = "159",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "IOP Publishing Ltd.",

number = "4",

}

Gan, T, Shporer, A, Livingston, JH, Collins, KA, Mao, S, Trani, AA, Gandolfi, D, Hirano, T, Luque, R, Stassun, KG, Ziegler, C, Howell, SB, Hellier, C, Irwin, JM, Winters, JG, Anderson, DR, Briceño, C, Law, N, Mann, AW, Bonfils, X, Astudillo-Defru, N, Jensen, ELN, Anglada-Escudé, G, Ricker, GR, Vanderspek, R, Latham, DW, Seager, S, Winn, JN, Jenkins, JM, Furesz, G, Guerrero, NM, Quintana, E, Twicken, JD, Caldwell, DA, Tenenbaum, P, Huang, CX, Rowden, P & Rojas-Ayala, B 2020, 'LHS 1815b: The First Thick-disk Planet Detected by TESS', Astronomical Journal, vol. 159, no. 4, 160. https://doi.org/10.3847/1538-3881/ab775a

TY - JOUR

T1 - LHS 1815b

T2 - The First Thick-disk Planet Detected by TESS

AU - Gan, Tianjun

AU - Shporer, Avi

AU - Livingston, John H.

AU - Collins, Karen A.

AU - Mao, Shude

AU - Trani, Alessandro A.

AU - Gandolfi, Davide

AU - Hirano, Teruyuki

AU - Luque, Rafael

AU - Stassun, Keivan G.

AU - Ziegler, Carl

AU - Howell, Steve B.

AU - Hellier, Coel

AU - Irwin, Jonathan M.

AU - Winters, Jennifer G.

AU - Anderson, David R.

AU - Briceño, César

AU - Law, Nicholas

AU - Mann, Andrew W.

AU - Bonfils, Xavier

AU - Astudillo-Defru, Nicola

AU - Jensen, Eric L.N.

AU - Anglada-Escudé, Guillem

AU - Ricker, George R.

AU - Vanderspek, Roland

AU - Latham, David W.

AU - Seager, Sara

AU - Winn, Joshua N.

AU - Jenkins, Jon M.

AU - Furesz, Gabor

AU - Guerrero, Natalia M.

AU - Quintana, Elisa

AU - Twicken, Joseph D.

AU - Caldwell, Douglas A.

AU - Tenenbaum, Peter

AU - Huang, Chelsea X.

AU - Rowden, Pamela

AU - Rojas-Ayala, Bárbara

PY - 2020/4

Y1 - 2020/4

N2 - We report the first discovery of a thick-disk planet, LHS 1815b (TOI-704b, TIC 260004324), detected in the Transiting Exoplanet Survey Satellite (TESS) survey. LHS 1815b transits a bright (V = 12.19 mag, K = 7.99 mag) and quiet M dwarf located 29.87 ± 0.02 pc away with a mass of 0.502 ± 0.015 M o&dot; and a radius of 0.501 ± 0.030 R o&dot;. We validate the planet by combining space- and ground-based photometry, spectroscopy, and imaging. The planet has a radius of 1.088 ± 0.064 R ⊕ with a 3σ mass upper limit of 8.7 M ⊕. We analyze the galactic kinematics and orbit of the host star LHS 1815 and find that it has a large probability (P thick/P thin = 6482) to be in the thick disk with a much higher expected maximal height (Z max = 1.8 kpc) above the Galactic plane compared with other TESS planet host stars. Future studies of the interior structure and atmospheric properties of planets in such systems using, for example, the upcoming James Webb Space Telescope, can investigate the differences in formation efficiency and evolution for planetary systems between different Galactic components (thick disks, thin disks, and halo).

AB - We report the first discovery of a thick-disk planet, LHS 1815b (TOI-704b, TIC 260004324), detected in the Transiting Exoplanet Survey Satellite (TESS) survey. LHS 1815b transits a bright (V = 12.19 mag, K = 7.99 mag) and quiet M dwarf located 29.87 ± 0.02 pc away with a mass of 0.502 ± 0.015 M o&dot; and a radius of 0.501 ± 0.030 R o&dot;. We validate the planet by combining space- and ground-based photometry, spectroscopy, and imaging. The planet has a radius of 1.088 ± 0.064 R ⊕ with a 3σ mass upper limit of 8.7 M ⊕. We analyze the galactic kinematics and orbit of the host star LHS 1815 and find that it has a large probability (P thick/P thin = 6482) to be in the thick disk with a much higher expected maximal height (Z max = 1.8 kpc) above the Galactic plane compared with other TESS planet host stars. Future studies of the interior structure and atmospheric properties of planets in such systems using, for example, the upcoming James Webb Space Telescope, can investigate the differences in formation efficiency and evolution for planetary systems between different Galactic components (thick disks, thin disks, and halo).

UR - http://www.scopus.com/inward/record.url?scp=85087184376&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85087184376&partnerID=8YFLogxK

U2 - 10.3847/1538-3881/ab775a

DO - 10.3847/1538-3881/ab775a

M3 - Article

AN - SCOPUS:85087184376

SN - 0004-6256

VL - 159

JO - Astronomical Journal

JF - Astronomical Journal

IS - 4

M1 - 160

ER -

LHS 1815b: The First Thick-disk Planet Detected by TESS

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