6 research outputs found
KELT-16b: A Highly Irradiated, Ultra-short Period Hot Jupiter Nearing Tidal Disruption
We announce the discovery of KELT-16b, a highly irradiated, ultra-short period hot Jupiter transiting the relatively bright (V = 11.7) star TYC 2688-1839-1/KELT-16. A global analysis of the system shows KELT-16 to be an F7V star with K and . The planet is a relatively high-mass inflated gas giant with density g cm-3, surface gravity , and K. The best-fitting linear ephemeris is and day. KELT-16b joins WASP-18b, -19b, -43b, -103b, and HATS-18b as the only giant transiting planets with P \u3c 1 day. Its ultra-short period and high irradiation make it a benchmark target for atmospheric studies by the Hubble Space Telescope, Spitzer, and eventually the James Webb Space Telescope. For example, as a hotter, higher-mass analog of WASP-43b, KELT-16b may feature an atmospheric temperature-pressure inversion and day-to-night temperature swing extreme enough for TiO to rain out at the terminator. KELT-16b could also join WASP-43b in extending tests of the observed mass-metallicity relation of the solar system gas giants to higher masses. KELT-16b currently orbits at a mere ∼1.7 Roche radii from its host star, and could be tidally disrupted in as little as a few ×105 years (for a stellar tidal quality factor of ). Finally, the likely existence of a widely separated bound stellar companion in the KELT-16 system makes it possible that Kozai-Lidov (KL) oscillations played a role in driving KELT-16b inward to its current precarious orbit
KELT-16b: A Highly Irradiated, Ultra-short Period Hot Jupiter Nearing Tidal Disruption
We announce the discovery of KELT-16b, a highly irradiated, ultra-short
period hot Jupiter transiting the relatively bright () star TYC
2688-1839-1. A global analysis of the system shows KELT-16 to be an F7V star
with K, ,
[Fe/H] = -0.002, , and . The planet is a
relatively high mass inflated gas giant with , , density g cm, surface
gravity , and K. The best-fitting linear ephemeris is BJD and d.
KELT-16b joins WASP-18b, -19b, -43b, -103b, and HATS-18b as the only giant
transiting planets with day. Its ultra-short period and high
irradiation make it a benchmark target for atmospheric studies by HST, Spitzer,
and eventually JWST. For example, as a hotter, higher mass analog of WASP-43b,
KELT-16b may feature an atmospheric temperature-pressure inversion and
day-to-night temperature swing extreme enough for TiO to rain out at the
terminator. KELT-16b could also join WASP-43b in extending tests of the
observed mass-metallicity relation of the Solar System gas giants to higher
masses. KELT-16b currently orbits at a mere 1.7 Roche radii from its
host star, and could be tidally disrupted in as little as a few
years (for a stellar tidal quality factor of ). Finally, the
likely existence of a widely separated bound stellar companion in the KELT-16
system makes it possible that Kozai-Lidov oscillations played a role in driving
KELT-16b inward to its current precarious orbit.Comment: 16 pages, 18 Figures, 7 Tables, Accepted for publication in A