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KELT-23b: A Hot Jupiter Transiting a Near-Solar Twin Close to the TESS and JWST Continuous Viewing Zones | | Daniel Johns
; Phillip Reed
; Joseph Rodriguez
; Joshua Pepper
; Keivan Stassun
; Kaloyan Penev
; B. Scott Gaudi
; Jonathan Labadie-Bartz
; Benjamin Fulton
; Samuel Quinn
; Jason Eastman
; David Ciardi
; Lea Hirsch
; Daniel Stevens
; Catherine Stevens
; Thomas Oberst
; David Cohen
; Eric Jensen
; Paul Benni
; Steven Villanueva
; Gabriel Murawski
; Allyson Bieryla
; David Latham
; Siegfried Vanaverbeke
; Franky Dubois
; Steve Rau
; Ludwig Logie
; Ryan Rauenzahn
; Robert Wittenmyer
; Roberto Zambelli
; Daniel Bayliss
; Thomas Beatty
; Karen Collins
; Knicole Colon
; Ivan Curtis
; Phil Evans
; Joao Gregorio
; David James
; Darren DePoy
; Marshall Johnson
; Michael Joner
; David Kasper
; John Kielkopf
; Rudolf Kuhn
; Michael Lund
; Mark Manner
; Jennifer Marshall
; Kim McLeod
; Matthew Penny
; Howard M. Relles
; Robert Siverd
; Denise Stephens
; Chris Stockdale
; Thiam-Guan Tan
; Mark Trueblood
; Patricia Trueblood
; Xinyu Yao
; | | Date: |
28 Feb 2019 | | Abstract: | We announce the discovery of KELT-23b, a hot Jupiter transiting the
relatively bright ($V=10.3$) star BD+66 911 (TYC 4187-996-1), and characterize
the system using follow-up photometry and spectroscopy. A global fit to the
system yields $T_{eff}=5900pm49 K$, $M_*=0.945^{+0.060}_{-0.054} M_{odot}$,
$R_*=0.995pm0.015 R_{odot}$, $L_*=1.082^{+0.051}_{-0.048} L_{odot}$,
log$g_{*}=4.418^{+0.026}_{-0.025}$ (cgs), and $left[{
m Fe}/{
m
H}
ight]=-0.105pm49$. KELT-23b is a hot Jupiter with mass
$M_P=0.938^{+0.045}_{-0.042} M_{
m J}$, radius $R_P=1.322pm0.025 R_{
m J}$,
and density $
ho_P=0.504^{+0.038}_{-0.035}$ g cm$^{-3}$. Intense insolation
flux from the star has likely caused KELT-23b to become inflated. The time of
inferior conjunction is $T_0=2458149.40776pm0.00091~
m {BJD_{TDB}}$ and the
orbital period is $P=2.255353^{+0.000031}_{-0.000030}$ days. Due to strong
tidal interactions, the planet is likely to spiral into its host within roughly
a Gyr. This system has one of the highest positive ecliptic latitudes of all
transiting planet hosts known to date, placing it near the Transiting Planet
Survey Satellite and James Webb Space Telescope continuous viewing zones. Thus
we expect it to be an excellent candidate for long-term monitoring and
follow-up with these facilities. | | Source: | arXiv, 1903.0031 | | Services: | Forum | Review | PDF | Favorites | |
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