KOI-142, the king of transit variations, is a pair of planets near the 2:1 resonance
Research output: Contribution to journal › Journal article › Research › peer-review
Standard
KOI-142, the king of transit variations, is a pair of planets near the 2:1 resonance. / Nesvorný, David; Kipping, David; Terrell, Dirk; Hartman, Joel; Bakos, Gáspár A.; Buchhave, Lars A.
In: Astrophysical Journal, Vol. 777, No. 1, 3, 01.11.2013.Research output: Contribution to journal › Journal article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - KOI-142, the king of transit variations, is a pair of planets near the 2:1 resonance
AU - Nesvorný, David
AU - Kipping, David
AU - Terrell, Dirk
AU - Hartman, Joel
AU - Bakos, Gáspár A.
AU - Buchhave, Lars A.
PY - 2013/11/1
Y1 - 2013/11/1
N2 - The transit timing variations (TTVs) can be used as a diagnostic of gravitational interactions between planets in a multi-planet system. Many Kepler Objects of Interest (KOIs) exhibit significant TTVs, but KOI-142.01 stands out among them with an unrivaled ≃12 hr TTV amplitude. Here we report a thorough analysis of KOI-142.01's transits. We discover periodic transit duration variations (TDVs) of KOI-142.01 that are nearly in phase with the observed TTVs. We show that KOI-142.01's TTVs and TDVs uniquely detect a non-transiting companion with a mass ≃0.63 that of Jupiter (KOI-142c). KOI-142.01's mass inferred from the transit variations is consistent with the measured transit depth, suggesting a Neptune-class planet (KOI-142b). The orbital period ratio P /P = 2.03 indicates that the two planets are just wide of the 2:1 resonance. The present dynamics of this system, characterized here in detail, can be used to test various formation theories that have been proposed to explain the near-resonant pairs of exoplanets.
AB - The transit timing variations (TTVs) can be used as a diagnostic of gravitational interactions between planets in a multi-planet system. Many Kepler Objects of Interest (KOIs) exhibit significant TTVs, but KOI-142.01 stands out among them with an unrivaled ≃12 hr TTV amplitude. Here we report a thorough analysis of KOI-142.01's transits. We discover periodic transit duration variations (TDVs) of KOI-142.01 that are nearly in phase with the observed TTVs. We show that KOI-142.01's TTVs and TDVs uniquely detect a non-transiting companion with a mass ≃0.63 that of Jupiter (KOI-142c). KOI-142.01's mass inferred from the transit variations is consistent with the measured transit depth, suggesting a Neptune-class planet (KOI-142b). The orbital period ratio P /P = 2.03 indicates that the two planets are just wide of the 2:1 resonance. The present dynamics of this system, characterized here in detail, can be used to test various formation theories that have been proposed to explain the near-resonant pairs of exoplanets.
UR - http://www.scopus.com/inward/record.url?scp=84886064622&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/777/1/3
DO - 10.1088/0004-637X/777/1/3
M3 - Journal article
AN - SCOPUS:84886064622
VL - 777
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1
M1 - 3
ER -
ID: 77577276