PREDICTING THE CONFIGURATION OF A PLANETARY SYSTEM: KOI-152 OBSERVED BY KEPLER
Journal Article
·
· Astrophysical Journal
- Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008 (China)
The recent Kepler discovery of KOI-152 reveals a system of three hot super-Earth candidates that are in or near a 4:2:1 mean motion resonance. It is unlikely that they formed in situ; the planets probably underwent orbital migration during the formation and evolution process. The small semimajor axes of the three planets suggest that migration stopped at the inner edge of the primordial gas disk. In this paper, we focus on the influence of migration halting mechanisms, including migration 'dead zones', and inner truncation by the stellar magnetic field. We show that the stellar accretion rate, stellar magnetic field, and the speed of migration in the protoplanetary disk are the main factors affecting the final configuration of KOI-152. Our simulations suggest that three planets may be around a star with low star accretion rate or with high magnetic field. On the other hand, slow type I migration, which decreases to one-tenth of the linear analysis results, favors forming the configuration of KOI-152. Under such a formation scenario, the planets in the system are not massive enough to open gaps in the gas disk. The upper limits of the planetary masses are estimated to be about 15, 19, and 24 M{sub Circled-Plus }, respectively. Our results are also indicative of the near Laplacian configurations that are quite common in planetary systems.
- OSTI ID:
- 22039356
- Journal Information:
- Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 753; ISSN ASJOAB; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
Similar Records
CHARACTERIZING THE COOL KOIs. IV. KEPLER-32 AS A PROTOTYPE FOR THE FORMATION OF COMPACT PLANETARY SYSTEMS THROUGHOUT THE GALAXY
Revisiting the Architecture of the KOI-89 System
CIRCUMBINARY PLANET FORMATION IN THE KEPLER-16 SYSTEM. I. N-BODY SIMULATIONS
Journal Article
·
Sat Feb 09 23:00:00 EST 2013
· Astrophysical Journal
·
OSTI ID:22167765
Revisiting the Architecture of the KOI-89 System
Journal Article
·
Sun Nov 01 00:00:00 EDT 2020
· The Astronomical Journal (Online)
·
OSTI ID:23013419
CIRCUMBINARY PLANET FORMATION IN THE KEPLER-16 SYSTEM. I. N-BODY SIMULATIONS
Journal Article
·
Sun Jun 10 00:00:00 EDT 2012
· Astrophysical Journal
·
OSTI ID:22037072