KELT-16b: A Highly Irradiated, Ultra-short Period Hot Jupiter Nearing Tidal Disruption Academic Article uri icon

abstract

  • Abstract 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, , m{H}}]=-{0.002}_{-0.085}^{+0.086}$?> , , and . The planet is a relatively high-mass inflated gas giant with m{P}}}={2.75}_{-0.15}^{+0.16}{M}_{{
    m{J}}}$?>     , m{P}}}={1.415}_{-0.067}^{+0.084}{R}_{{
    m{J}}}$?>     , density ho }_{{
    m{P}}}=1.20pm 0.18$?>     g cm3, surface gravity m{P}}}={3.530}_{-0.049}^{+0.042}$?> , and K. The best-fitting linear ephemeris is m{C}}}=2457247.24791pm 0.00019$?> and day. KELT-16b joins WASP-18b, 19b, 43b, 103b, and HATS-18b as the only giant transiting planets with P < 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 temperaturepressure 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 massmetallicity 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 KozaiLidov (KL) oscillations played a role in driving KELT-16b inw

published proceedings

  • ASTRONOMICAL JOURNAL

altmetric score

  • 91.08

author list (cited authors)

  • Oberst, T. E., Rodriguez, J. E., Colon, K. D., Angerhausen, D., Bieryla, A., Ngo, H., ... Trueblood, P.

citation count

  • 44

complete list of authors

  • Oberst, Thomas E||Rodriguez, Joseph E||Colon, Knicole D||Angerhausen, Daniel||Bieryla, Allyson||Ngo, Henry||Stevens, Daniel J||Stassun, Keivan G||Gaudi, B Scott||Pepper, Joshua||Penev, Kaloyan||Mawet, Dimitri||Latham, David W||Heintz, Tyler M||Osei, Baffour W||Collins, Karen A||Kielkopf, John F||Visgaitis, Tiffany||Reed, Phillip A||Escamilla, Alejandra||Yazdi, Sormeh||McLeod, Kim K||Lunsford, Leanne T||Spencer, Michelle||Joner, Michael D||Gregorio, Joao||Gaillard, Clement||Matt, Kyle||Dumont, Mary Thea||Stephens, Denise C||Cohen, David H||Jensen, Eric LN||Novati, Sebastiano Calchi||Bozza, Valerio||Labadie-Bartz, Jonathan||Siverd, Robert J||Lund, Michael B||Beatty, Thomas G||Eastman, Jason D||Penny, Matthew T||Manner, Mark||Zambelli, Roberto||Fulton, Benjamin J||Stockdale, Christopher||Depoy, DL||Marshall, Jennifer L||Pogge, Richard W||Gould, Andrew||Trueblood, Mark||Trueblood, Patricia

publication date

  • March 2017