TY - JOUR
T1 - TOI-1994b
T2 - A Low-mass Eccentric Brown Dwarf Transiting A Subgiant Star
AU - Page, Emma
AU - Pepper, Joshua
AU - Wright, Duncan
AU - Rodriguez, Joseph E.
AU - Wittenmyer, Robert A.
AU - Kane, Stephen R.
AU - Addison, Brett
AU - Bedding, Timothy
AU - Bowler, Brendan P.
AU - Barclay, Thomas
AU - Collins, Karen A.
AU - Evans, Phil
AU - Horner, Jonathan
AU - Jensen, Eric L.N.
AU - Johnson, Marshall C.
AU - Kielkopf, John
AU - Mireles, Ismael
AU - Plavchan, Peter
AU - Quinn, Samuel N.
AU - Seager, S.
AU - Shporer, Avi
AU - Stassun, Keivan G.
AU - Striegel, Stephanie
AU - Winn, Joshua N.
AU - Zhou, George
AU - Ziegler, Carl
N1 - Publisher Copyright:
© 2024. The Author(s). Published by the American Astronomical Society.
PY - 2024/3/1
Y1 - 2024/3/1
N2 - We present the discovery of TOI-1994b, a low-mass brown dwarf transiting a hot subgiant star on a moderately eccentric orbit. TOI-1994 has an effective temperature of 7700 − 410 + 720 K, V magnitude of 10.51 mag and log(g) of 3.982 − 0.065 + 0.067 . The brown dwarf has a mass of 22.1 − 2.5 + 2.6 M J, a period of 4.034 days, an eccentricity of 0.341 − 0.059 + 0.054 , and a radius of 1.220 − 0.071 + 0.082 R J. TOI-1994b is more eccentric than other transiting brown dwarfs with similar masses and periods. The population of low-mass brown dwarfs may have properties similar to planetary systems if they were formed in the same way, but the short orbital period and high eccentricity of TOI-1994b may contrast this theory. An evolved host provides a valuable opportunity to understand the influence stellar evolution has on the substellar companion’s fundamental properties. With precise age, mass, and radius, the global analysis and characterization of TOI-1994b augments the small number of transiting brown dwarfs and allows the testing of substellar evolution models.
AB - We present the discovery of TOI-1994b, a low-mass brown dwarf transiting a hot subgiant star on a moderately eccentric orbit. TOI-1994 has an effective temperature of 7700 − 410 + 720 K, V magnitude of 10.51 mag and log(g) of 3.982 − 0.065 + 0.067 . The brown dwarf has a mass of 22.1 − 2.5 + 2.6 M J, a period of 4.034 days, an eccentricity of 0.341 − 0.059 + 0.054 , and a radius of 1.220 − 0.071 + 0.082 R J. TOI-1994b is more eccentric than other transiting brown dwarfs with similar masses and periods. The population of low-mass brown dwarfs may have properties similar to planetary systems if they were formed in the same way, but the short orbital period and high eccentricity of TOI-1994b may contrast this theory. An evolved host provides a valuable opportunity to understand the influence stellar evolution has on the substellar companion’s fundamental properties. With precise age, mass, and radius, the global analysis and characterization of TOI-1994b augments the small number of transiting brown dwarfs and allows the testing of substellar evolution models.
UR - https://www.scopus.com/pages/publications/85185510546
UR - https://www.scopus.com/pages/publications/85185510546#tab=citedBy
U2 - 10.3847/1538-3881/ad1a18
DO - 10.3847/1538-3881/ad1a18
M3 - Article
AN - SCOPUS:85185510546
SN - 0004-6256
VL - 167
JO - Astronomical Journal
JF - Astronomical Journal
IS - 3
M1 - 109
ER -