Details

Autor(en) / Beteiligte

• Patra, Kishore C.
• Winn, Joshua N.
• Holman, Matthew J.
• Gillon, Michael
• Burdanov, Artem
• Jehin, Emmanuel
• Delrez, Laetitia
• Pozuelos, Francisco J.
• Barkaoui, Khalid
• Benkhaldoun, Zouhair
• Narita, Norio
• Fukui, Akihiko
• Kusakabe, Nobuhiko
• Kawauchi, Kiyoe
• Terada, Yuka
• Bouma, L. G.
• Weinberg, Nevin N.
• Broome, Madelyn

Titel

The Continuing Search for Evidence of Tidal Orbital Decay of Hot Jupiters

Ist Teil von

• The Astronomical journal, 2020-04, Vol.159 (4), p.150

Ort / Verlag

Madison: The American Astronomical Society

Erscheinungsjahr

2020

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Many of the known hot Jupiters are formally unstable to tidal orbital decay. The only hot Jupiter for which orbital decay has been directly detected is WASP-12, for which transit-timing measurements spanning more than a decade have revealed that the orbital period is decreasing at a rate of , corresponding to a reduced tidal quality factor of about 2 × 105. Here, we present a compilation of transit-timing data for WASP-12 and 11 other systems that are especially favorable for detecting orbital decay: KELT-16; WASP-18, 19, 43, 72, 103, 114, and 122; HAT-P-23; HATS-18; and OGLE-TR-56. For most of these systems we present new data that extend the time baseline over which observations have been performed. None of the systems besides WASP-12 display convincing evidence for period changes, with typical upper limits on dP/dt on the order of 10−9 or 10−10, and lower limits on the reduced tidal quality factor on the order of 105. One possible exception is WASP-19, which shows a statistically significant trend, although it may be a spurious effect of starspot activity. Further observations are encouraged.