Dynamical Constraints on Nontransiting Planets Orbiting TRAPPIST-1

Daniel Jontof-Hutter, Vinh H. Truong, Eric B. Ford, Paul Robertson, Ryan C. Terrien

Research output: Contribution to journalArticle

Abstract

We derive lower bounds on the orbital distance and inclination of a putative planet beyond the transiting seven planets of TRAPPIST-1, for a range of masses ranging from 0.08 M Jup to 3.5 M Jup. While the outer architecture of this system will ultimately be constrained by radial velocity measurements over time, we present dynamical constraints from the remarkably coplanar configuration of the seven transiting planets, which is sensitive to modestly inclined perturbers. We find that the observed configuration is unlikely if a Jovian-mass planet inclined by ≥3° to the transiting planet exists within 0.53 au, exceeding any constraints from transit timing variations (TTV) induced in the known planets from an undetected perturber. Our results will inform RV programs targeting TRAPPIST-1, and for near coplanar outer planets, tighter constraints are anticipated for radial velocity (RV) precisions of ≲140 m s-1. At higher inclinations, putative planets are ruled out to greater orbital distances with orbital periods up to a few years.

Original languageEnglish (US)
Article number239
JournalAstronomical Journal
Volume155
Issue number6
DOIs
StatePublished - Jun 1 2018

Fingerprint

planets
planet
radial velocity
orbitals
inclination
transit
configurations
velocity measurement
targeting
time measurement

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Jontof-Hutter, D., Truong, V. H., Ford, E. B., Robertson, P., & Terrien, R. C. (2018). Dynamical Constraints on Nontransiting Planets Orbiting TRAPPIST-1. Astronomical Journal, 155(6), [239]. https://doi.org/10.3847/1538-3881/aabee8
Jontof-Hutter, Daniel ; Truong, Vinh H. ; Ford, Eric B. ; Robertson, Paul ; Terrien, Ryan C. / Dynamical Constraints on Nontransiting Planets Orbiting TRAPPIST-1. In: Astronomical Journal. 2018 ; Vol. 155, No. 6.
@article{ba9e9f4f145e4fd3b222d49e427fe4e3,
title = "Dynamical Constraints on Nontransiting Planets Orbiting TRAPPIST-1",
abstract = "We derive lower bounds on the orbital distance and inclination of a putative planet beyond the transiting seven planets of TRAPPIST-1, for a range of masses ranging from 0.08 M Jup to 3.5 M Jup. While the outer architecture of this system will ultimately be constrained by radial velocity measurements over time, we present dynamical constraints from the remarkably coplanar configuration of the seven transiting planets, which is sensitive to modestly inclined perturbers. We find that the observed configuration is unlikely if a Jovian-mass planet inclined by ≥3° to the transiting planet exists within 0.53 au, exceeding any constraints from transit timing variations (TTV) induced in the known planets from an undetected perturber. Our results will inform RV programs targeting TRAPPIST-1, and for near coplanar outer planets, tighter constraints are anticipated for radial velocity (RV) precisions of ≲140 m s-1. At higher inclinations, putative planets are ruled out to greater orbital distances with orbital periods up to a few years.",
author = "Daniel Jontof-Hutter and Truong, {Vinh H.} and Ford, {Eric B.} and Paul Robertson and Terrien, {Ryan C.}",
year = "2018",
month = "6",
day = "1",
doi = "10.3847/1538-3881/aabee8",
language = "English (US)",
volume = "155",
journal = "Astronomical Journal",
issn = "0004-6256",
publisher = "IOP Publishing Ltd.",
number = "6",

}

Jontof-Hutter, D, Truong, VH, Ford, EB, Robertson, P & Terrien, RC 2018, 'Dynamical Constraints on Nontransiting Planets Orbiting TRAPPIST-1', Astronomical Journal, vol. 155, no. 6, 239. https://doi.org/10.3847/1538-3881/aabee8

Dynamical Constraints on Nontransiting Planets Orbiting TRAPPIST-1. / Jontof-Hutter, Daniel; Truong, Vinh H.; Ford, Eric B.; Robertson, Paul; Terrien, Ryan C.

In: Astronomical Journal, Vol. 155, No. 6, 239, 01.06.2018.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Dynamical Constraints on Nontransiting Planets Orbiting TRAPPIST-1

AU - Jontof-Hutter, Daniel

AU - Truong, Vinh H.

AU - Ford, Eric B.

AU - Robertson, Paul

AU - Terrien, Ryan C.

PY - 2018/6/1

Y1 - 2018/6/1

N2 - We derive lower bounds on the orbital distance and inclination of a putative planet beyond the transiting seven planets of TRAPPIST-1, for a range of masses ranging from 0.08 M Jup to 3.5 M Jup. While the outer architecture of this system will ultimately be constrained by radial velocity measurements over time, we present dynamical constraints from the remarkably coplanar configuration of the seven transiting planets, which is sensitive to modestly inclined perturbers. We find that the observed configuration is unlikely if a Jovian-mass planet inclined by ≥3° to the transiting planet exists within 0.53 au, exceeding any constraints from transit timing variations (TTV) induced in the known planets from an undetected perturber. Our results will inform RV programs targeting TRAPPIST-1, and for near coplanar outer planets, tighter constraints are anticipated for radial velocity (RV) precisions of ≲140 m s-1. At higher inclinations, putative planets are ruled out to greater orbital distances with orbital periods up to a few years.

AB - We derive lower bounds on the orbital distance and inclination of a putative planet beyond the transiting seven planets of TRAPPIST-1, for a range of masses ranging from 0.08 M Jup to 3.5 M Jup. While the outer architecture of this system will ultimately be constrained by radial velocity measurements over time, we present dynamical constraints from the remarkably coplanar configuration of the seven transiting planets, which is sensitive to modestly inclined perturbers. We find that the observed configuration is unlikely if a Jovian-mass planet inclined by ≥3° to the transiting planet exists within 0.53 au, exceeding any constraints from transit timing variations (TTV) induced in the known planets from an undetected perturber. Our results will inform RV programs targeting TRAPPIST-1, and for near coplanar outer planets, tighter constraints are anticipated for radial velocity (RV) precisions of ≲140 m s-1. At higher inclinations, putative planets are ruled out to greater orbital distances with orbital periods up to a few years.

UR - http://www.scopus.com/inward/record.url?scp=85048090692&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85048090692&partnerID=8YFLogxK

U2 - 10.3847/1538-3881/aabee8

DO - 10.3847/1538-3881/aabee8

M3 - Article

AN - SCOPUS:85048090692

VL - 155

JO - Astronomical Journal

JF - Astronomical Journal

SN - 0004-6256

IS - 6

M1 - 239

ER -