Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission

Theron W. Carmichael; Samuel N. Quinn; Alexander J. Mustill; Chelsea Huang; George Zhou; Carina M. Persson; Louise D. Nielsen; Karen A. Collins; Carl Ziegler; Kevin I. Collins; Joseph E. Rodriguez; Avi Shporer; Rafael Brahm; Andrew W. Mann; Francois Bouchy; Malcolm Fridlund; Keivan G. Stassun; Coel Hellier; Julia V. Seidel; Manu Stalport; Stephane Udry; Francesco Pepe; Michael Ireland; Maruša Žerjal; César Brice&ntilde;o; Nicholas Law; Andrés Jordán; Néstor Espinoza; Thomas Henning; Paula Sarkis; David W. Latham

doi:10.3847/1538-3881/ab9b84

Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission

Theron W. Carmichael, Samuel N. Quinn, Alexander J. Mustill, Chelsea Huang, George Zhou, Carina M. Persson, Louise D. Nielsen, Karen A. Collins, Carl Ziegler, Kevin I. Collins, Joseph E. Rodriguez, Avi Shporer, Rafael Brahm, Andrew W. Mann, Francois Bouchy, Malcolm Fridlund, Keivan G. Stassun, Coel Hellier, Julia V. Seidel, Manu StalportStephane Udry, Francesco Pepe, Michael Ireland, Maruša Žerjal, César Briceño, Nicholas Law, Andrés Jordán, Néstor Espinoza, Thomas Henning, Paula Sarkis, David W. Latham

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Abstract

We report the discovery of two intermediate-mass transiting brown dwarfs (BDs), TOI-569b and TOI-1406b, from NASA's Transiting Exoplanet Survey Satellite mission. TOI-569b has an orbital period of P=.55604±0.00016 days, a mass of Mb = 64.1±1.9 MJ, and a radius of Rb = 0.75±0.02 RJ. Its host star, TOI-569, has a mass of Må = 1.21±0.05 M, a radius of Rå = 1.47±0.03 R, [Fe H 0.29 0.09] = + dex, and an effective temperature of Teff = 5768±10K. TOI-1406b has an orbital period of P=10.57415±0.00063 days, a mass of Mb = 46.0± 2.7 MJ, and a radius of Rb = 0.86±0.03 RJ. The host star for this BD has a mass of Må = 1.18±0.09 M, a radius of Rå = 1.35±0.03 R, [Fe/H] =-0.08± 0.09 dex, and an effective temperature of Teff = 6290±100 K. Both BDs are in circular orbits around their host stars and are older than 3 Gyr based on stellar isochrone models of the stars. TOI-569 is one of two slightly evolved stars known to host a transiting BD (the other being KOI-415). TOI-1406b is one of three known transiting BDs to occupy the mass range of 40-50 MJ and one of two to have a circular orbit at a period near 10 days (with the first being KOI-205b). Both BDs have reliable ages from stellar isochrones, in addition to their well-constrained masses and radii, making them particularly valuable as tests for substellar isochrones in the BD mass-radius diagram.

Original language	English
Article number	53
Journal	Astronomical Journal
Volume	160
Issue number	1
DOIs	https://doi.org/10.3847/1538-3881/ab9b84
State	Published - Jul 2020
Externally published	Yes

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Carmichael, T. W., Quinn, S. N., Mustill, A. J., Huang, C., Zhou, G., Persson, C. M., Nielsen, L. D., Collins, K. A., Ziegler, C., Collins, K. I., Rodriguez, J. E., Shporer, A., Brahm, R., Mann, A. W., Bouchy, F., Fridlund, M., Stassun, K. G., Hellier, C., Seidel, J. V., ... Latham, D. W. (2020). Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission. Astronomical Journal, 160(1), Article 53. https://doi.org/10.3847/1538-3881/ab9b84

@article{b6334e74ad894cd7a3496e1116dc7da4,

title = "Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission",

abstract = "We report the discovery of two intermediate-mass transiting brown dwarfs (BDs), TOI-569b and TOI-1406b, from NASA's Transiting Exoplanet Survey Satellite mission. TOI-569b has an orbital period of P=.55604±0.00016 days, a mass of Mb = 64.1±1.9 MJ, and a radius of Rb = 0.75±0.02 RJ. Its host star, TOI-569, has a mass of M{\aa} = 1.21±0.05 M, a radius of R{\aa} = 1.47±0.03 R, [Fe H 0.29 0.09] = + dex, and an effective temperature of Teff = 5768±10K. TOI-1406b has an orbital period of P=10.57415±0.00063 days, a mass of Mb = 46.0± 2.7 MJ, and a radius of Rb = 0.86±0.03 RJ. The host star for this BD has a mass of M{\aa} = 1.18±0.09 M, a radius of R{\aa} = 1.35±0.03 R, [Fe/H] =-0.08± 0.09 dex, and an effective temperature of Teff = 6290±100 K. Both BDs are in circular orbits around their host stars and are older than 3 Gyr based on stellar isochrone models of the stars. TOI-569 is one of two slightly evolved stars known to host a transiting BD (the other being KOI-415). TOI-1406b is one of three known transiting BDs to occupy the mass range of 40-50 MJ and one of two to have a circular orbit at a period near 10 days (with the first being KOI-205b). Both BDs have reliable ages from stellar isochrones, in addition to their well-constrained masses and radii, making them particularly valuable as tests for substellar isochrones in the BD mass-radius diagram.",

author = "Carmichael, {Theron W.} and Quinn, {Samuel N.} and Mustill, {Alexander J.} and Chelsea Huang and George Zhou and Persson, {Carina M.} and Nielsen, {Louise D.} and Collins, {Karen A.} and Carl Ziegler and Collins, {Kevin I.} and Rodriguez, {Joseph E.} and Avi Shporer and Rafael Brahm and Mann, {Andrew W.} and Francois Bouchy and Malcolm Fridlund and Stassun, {Keivan G.} and Coel Hellier and Seidel, {Julia V.} and Manu Stalport and Stephane Udry and Francesco Pepe and Michael Ireland and Maru{\v s}a {\v Z}erjal and C{\'e}sar Briceño and Nicholas Law and Andr{\'e}s Jord{\'a}n and N{\'e}stor Espinoza and Thomas Henning and Paula Sarkis and Latham, {David W.}",

year = "2020",

month = jul,

doi = "10.3847/1538-3881/ab9b84",

language = "English",

volume = "160",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

number = "1",

}

Carmichael, TW, Quinn, SN, Mustill, AJ, Huang, C, Zhou, G, Persson, CM, Nielsen, LD, Collins, KA, Ziegler, C, Collins, KI, Rodriguez, JE, Shporer, A, Brahm, R, Mann, AW, Bouchy, F, Fridlund, M, Stassun, KG, Hellier, C, Seidel, JV, Stalport, M, Udry, S, Pepe, F, Ireland, M, Žerjal, M, Briceño, C, Law, N, Jordán, A, Espinoza, N, Henning, T, Sarkis, P & Latham, DW 2020, 'Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission', Astronomical Journal, vol. 160, no. 1, 53. https://doi.org/10.3847/1538-3881/ab9b84

TY - JOUR

T1 - Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission

AU - Carmichael, Theron W.

AU - Quinn, Samuel N.

AU - Mustill, Alexander J.

AU - Huang, Chelsea

AU - Zhou, George

AU - Persson, Carina M.

AU - Nielsen, Louise D.

AU - Collins, Karen A.

AU - Ziegler, Carl

AU - Collins, Kevin I.

AU - Rodriguez, Joseph E.

AU - Shporer, Avi

AU - Brahm, Rafael

AU - Mann, Andrew W.

AU - Bouchy, Francois

AU - Fridlund, Malcolm

AU - Stassun, Keivan G.

AU - Hellier, Coel

AU - Seidel, Julia V.

AU - Stalport, Manu

AU - Udry, Stephane

AU - Pepe, Francesco

AU - Ireland, Michael

AU - Žerjal, Maruša

AU - Briceño, César

AU - Law, Nicholas

AU - Jordán, Andrés

AU - Espinoza, Néstor

AU - Henning, Thomas

AU - Sarkis, Paula

AU - Latham, David W.

PY - 2020/7

Y1 - 2020/7

N2 - We report the discovery of two intermediate-mass transiting brown dwarfs (BDs), TOI-569b and TOI-1406b, from NASA's Transiting Exoplanet Survey Satellite mission. TOI-569b has an orbital period of P=.55604±0.00016 days, a mass of Mb = 64.1±1.9 MJ, and a radius of Rb = 0.75±0.02 RJ. Its host star, TOI-569, has a mass of Må = 1.21±0.05 M, a radius of Rå = 1.47±0.03 R, [Fe H 0.29 0.09] = + dex, and an effective temperature of Teff = 5768±10K. TOI-1406b has an orbital period of P=10.57415±0.00063 days, a mass of Mb = 46.0± 2.7 MJ, and a radius of Rb = 0.86±0.03 RJ. The host star for this BD has a mass of Må = 1.18±0.09 M, a radius of Rå = 1.35±0.03 R, [Fe/H] =-0.08± 0.09 dex, and an effective temperature of Teff = 6290±100 K. Both BDs are in circular orbits around their host stars and are older than 3 Gyr based on stellar isochrone models of the stars. TOI-569 is one of two slightly evolved stars known to host a transiting BD (the other being KOI-415). TOI-1406b is one of three known transiting BDs to occupy the mass range of 40-50 MJ and one of two to have a circular orbit at a period near 10 days (with the first being KOI-205b). Both BDs have reliable ages from stellar isochrones, in addition to their well-constrained masses and radii, making them particularly valuable as tests for substellar isochrones in the BD mass-radius diagram.

AB - We report the discovery of two intermediate-mass transiting brown dwarfs (BDs), TOI-569b and TOI-1406b, from NASA's Transiting Exoplanet Survey Satellite mission. TOI-569b has an orbital period of P=.55604±0.00016 days, a mass of Mb = 64.1±1.9 MJ, and a radius of Rb = 0.75±0.02 RJ. Its host star, TOI-569, has a mass of Må = 1.21±0.05 M, a radius of Rå = 1.47±0.03 R, [Fe H 0.29 0.09] = + dex, and an effective temperature of Teff = 5768±10K. TOI-1406b has an orbital period of P=10.57415±0.00063 days, a mass of Mb = 46.0± 2.7 MJ, and a radius of Rb = 0.86±0.03 RJ. The host star for this BD has a mass of Må = 1.18±0.09 M, a radius of Rå = 1.35±0.03 R, [Fe/H] =-0.08± 0.09 dex, and an effective temperature of Teff = 6290±100 K. Both BDs are in circular orbits around their host stars and are older than 3 Gyr based on stellar isochrone models of the stars. TOI-569 is one of two slightly evolved stars known to host a transiting BD (the other being KOI-415). TOI-1406b is one of three known transiting BDs to occupy the mass range of 40-50 MJ and one of two to have a circular orbit at a period near 10 days (with the first being KOI-205b). Both BDs have reliable ages from stellar isochrones, in addition to their well-constrained masses and radii, making them particularly valuable as tests for substellar isochrones in the BD mass-radius diagram.

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U2 - 10.3847/1538-3881/ab9b84

DO - 10.3847/1538-3881/ab9b84

M3 - Article

AN - SCOPUS:85088304255

SN - 0004-6256

VL - 160

JO - Astronomical Journal

JF - Astronomical Journal

IS - 1

M1 - 53

ER -

Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission

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