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Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission

Carmichael, Theron W. ; Quinn, Samuel N. ; Mustill, Alexander J. LU orcid ; Huang, Chelsea ; Zhou, George ; Persson, Carina M. ; Nielsen, Louise D. ; Collins, Karen A. ; Ziegler, Carl and Collins, Kevin I. , et al. (2020) In The Astronomical Journal 160(1).
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... (More)

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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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
The Astronomical Journal
volume
160
issue
1
article number
53
publisher
IOP Publishing
external identifiers
  • scopus:85088304255
ISSN
0004-6256
DOI
10.3847/1538-3881/ab9b84
project
What will the PLATO observatory tell us about star-planet tidal interactions?
IMPACT: Comets, asteroids and the habitability of planets
language
English
LU publication?
yes
id
d4abd25d-4be1-433d-8230-738aadcaad6b
alternative location
https://arxiv.org/abs/2002.01943
date added to LUP
2020-12-18 14:49:48
date last changed
2024-03-20 21:36:10
@article{d4abd25d-4be1-433d-8230-738aadcaad6b,
  abstract     = {{<p>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.</p>}},
  author       = {{Carmichael, Theron W. and Quinn, Samuel N. and Mustill, Alexander J. and Huang, Chelsea and Zhou, George and Persson, Carina M. and Nielsen, Louise D. and Collins, Karen A. and Ziegler, Carl and Collins, Kevin I. and Rodriguez, Joseph E. and Shporer, Avi and Brahm, Rafael and Mann, Andrew W. and Bouchy, Francois and Fridlund, Malcolm and Stassun, Keivan G. and Hellier, Coel and Seidel, Julia V. and Stalport, Manu and Udry, Stephane and Pepe, Francesco and Ireland, Michael and Žerjal, Maruša and Brice&ntilde;o, César and Law, Nicholas and Jordán, Andrés and Espinoza, Néstor and Henning, Thomas and Sarkis, Paula and Latham, David W.}},
  issn         = {{0004-6256}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{IOP Publishing}},
  series       = {{The Astronomical Journal}},
  title        = {{Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission}},
  url          = {{http://dx.doi.org/10.3847/1538-3881/ab9b84}},
  doi          = {{10.3847/1538-3881/ab9b84}},
  volume       = {{160}},
  year         = {{2020}},
}