Rosemary A. Mardling
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View article: A decade of transit photometry for K2-19: Revised system architecture
A decade of transit photometry for K2-19: Revised system architecture Open
The star K2-19 hosts a pair of Neptunian planets deep inside the 3:2 resonance. They induce strong transit-timing variations with two incommensurate frequencies. Previous photodynamical modeling of 3.3 years of transit and radial velocity …
View article: Evidence for transit-timing variations of the 11 Myr exoplanet TOI-1227 b
Evidence for transit-timing variations of the 11 Myr exoplanet TOI-1227 b Open
TOI-1227 b is an 11 Myr old validated transiting planet in the middle of its contraction phase, with a current radius of 0.85 R$_J$. It orbits a low-mass pre-main sequence star (0.170 M$_\odot$, 0.56 R$_\odot$) every 27.4 days. The magneti…
View article: Evidence for transit-timing variations of the 11 Myr exoplanet TOI-1227 b
Evidence for transit-timing variations of the 11 Myr exoplanet TOI-1227 b Open
TOI-1227 b is an 11 Myr old validated transiting planet in the middle of its contraction phase, with a current radius of 0.85 R j . It orbits a low-mass pre-main sequence star (0.170 M ⊙ , 0.56 R ⊙ ) every 27.4 days. The magnetic activity …
View article: DYNAMICAL INTERACTIONS MAKE HOT JUPITERS in OPEN STAR CLUSTERS
DYNAMICAL INTERACTIONS MAKE HOT JUPITERS in OPEN STAR CLUSTERS Open
Explaining the origin and evolution of exoplanetary hot Jupiters remains a significant challenge. One possible mechanism for the production of hot Jupiters is planet-planet interactions, which produce them from planets born far from their …
View article: Analysis of Kozai Cycles in Equal-Mass Hierarchical Triple Supermassive Black Hole Mergers in the Presence of a Stellar Cluster
Analysis of Kozai Cycles in Equal-Mass Hierarchical Triple Supermassive Black Hole Mergers in the Presence of a Stellar Cluster Open
Supermassive black holes (SMBHs) play an important role in galaxy evolution. Binary and triple SMBHs can form after galaxy mergers. A third SMBH may accelerate the SMBH merging process, possibly through the Kozai mechanism. We use N -body …
View article: Analysis of Kozai cycles in equal-mass hierarchical triple supermassive black hole mergers in the presence of a stellar cluster
Analysis of Kozai cycles in equal-mass hierarchical triple supermassive black hole mergers in the presence of a stellar cluster Open
Supermassive black holes (SMBHs) play an important role in galaxy evolution. Binary and triple SMBHs can form after galaxy mergers. A third SMBH may accelerate the SMBH merging process, possibly through the Kozai mechanism. We use N-body s…
View article: Radial-velocity discovery of a second planet in the TOI-1338/BEBOP-1 circumbinary system
Radial-velocity discovery of a second planet in the TOI-1338/BEBOP-1 circumbinary system Open
View article: Self-consistent Spin, Tidal, and Dynamical Equations of Motion in the REBOUNDx Framework
Self-consistent Spin, Tidal, and Dynamical Equations of Motion in the REBOUNDx Framework Open
We introduce self-consistent spin, tidal, and dynamical equations of motion into REBOUNDx , a library of additional effects for the popular N -body integrator REBOUND . The equations of motion used are derived from the constant time lag ap…
View article: Self-Consistent Spin, Tidal and Dynamical Equations of Motion in the REBOUNDx Framework
Self-Consistent Spin, Tidal and Dynamical Equations of Motion in the REBOUNDx Framework Open
We have introduced self-consistent spin, tidal and dynamical equations of motion into REBOUNDx, a library of additional effects for the popular N-body integrator REBOUND. The equations of motion used are derived from the constant time lag …
View article: Radial-velocity discovery of a second planet in the TOI-1338/BEBOP-1 circumbinary system
Radial-velocity discovery of a second planet in the TOI-1338/BEBOP-1 circumbinary system Open
We report the detection of a gas-giant planet in orbit around both stars of an eclipsing binary star system that also contains the smaller, inner transiting planet TOI-1338b. The new planet, called TOI-1338/BEBOP-1c, was discovered using r…
View article: Quadruple-star systems are not always nested triples: a machine learning approach to dynamical stability
Quadruple-star systems are not always nested triples: a machine learning approach to dynamical stability Open
The dynamical stability of quadruple-star systems has traditionally been treated as a problem involving two `nested' triples which constitute a quadruple. In this novel study, we employed a machine learning algorithm, the multi-layer perce…
View article: Removing biases on the density of sub-Neptunes characterised via transit timing variations
Removing biases on the density of sub-Neptunes characterised via transit timing variations Open
Transit timing variations (TTVs) can provide useful information on compact multi-planetary systems observed by transits by setting constraints on the masses and eccentricities of the observed planets. This is especially helpful when the ho…
View article: TOI-1338: TESS’ First Transiting Circumbinary Planet
TOI-1338: TESS’ First Transiting Circumbinary Planet Open
© 2020. The American Astronomical Society. All rights reserved. We report the detection of the first circumbinary planet (CBP) found by Transiting Exoplanet Survey Satellite (TESS). The target, a known eclipsing binary, was observed in sec…
View article: Algebraic and machine learning approach to hierarchical triple-star stability
Algebraic and machine learning approach to hierarchical triple-star stability Open
We present two approaches to determine the dynamical stability of a hierarchical triple-star system. The first is an improvement on the Mardling–Aarseth stability formula from 2001, where we introduce a dependence on inner orbital eccentri…
View article: Unbiasing the density of TTV-characterised sub-Neptunes: Update of the mass-radius relationship of 34 Kepler planets
Unbiasing the density of TTV-characterised sub-Neptunes: Update of the mass-radius relationship of 34 Kepler planets Open
Transit Timing Variations (TTVs) can provide useful information on compact multi-planetary systems observed by transits, by putting constraints on the masses and eccentricities of the observed planets. This is especially helpful when the h…
View article: Unbiasing the density of TTV-characterised sub-Neptunes in multi-planetary systems: re-analysis of 34 Kepler planets
Unbiasing the density of TTV-characterised sub-Neptunes in multi-planetary systems: re-analysis of 34 Kepler planets Open
<p>Transit Timing Variations (TTVs) can provide useful information on compact multi-planetary systems observed by transits, by putting constraints on the masses and eccentricities of the observed planets. This is especially helpful w…
View article: Alleviating the transit timing variation bias in transit surveys
Alleviating the transit timing variation bias in transit surveys Open
Transit timing variations (TTVs) can provide useful information for systems observed in this way, putting constraints on the masses and eccentricities of the observed planets, and in some cases even revealing the existence of non-transitin…
View article: Alleviating the Transit Timing Variations bias in transit surveys. II. RIVERS: Twin resonant Earth-sized planets around Kepler-1972 recovered from Kepler's false positive
Alleviating the Transit Timing Variations bias in transit surveys. II. RIVERS: Twin resonant Earth-sized planets around Kepler-1972 recovered from Kepler's false positive Open
Transit Timing Variations (TTVs) can provide useful information for systems observed by transit, by putting constraints on the masses and eccentricities of the observed planets, or even constrain the existence of non-transiting companions.…
View article: BEBOP II: sensitivity to sub-Saturn circumbinary planets using radial-velocities
BEBOP II: sensitivity to sub-Saturn circumbinary planets using radial-velocities Open
BEBOP is a radial-velocity survey that monitors a sample of single-lined eclipsing binaries, in search of circumbinary planets by using high-resolution spectrographs. Here, we describe and test the methods we use to identify planetary sign…
View article: BEBOP II: sensitivity to sub-Saturn circumbinary planets using radial-velocities
BEBOP II: sensitivity to sub-Saturn circumbinary planets using radial-velocities Open
BEBOP is a radial-velocity survey that monitors a sample of single-lined eclipsing binaries, in search of circumbinary planets by using high-resolution spectrographs. Here, we describe and test the methods we use to identify planetary sign…
View article: Alleviating the transit timing variation bias in transit surveys
Alleviating the transit timing variation bias in transit surveys Open
Transit timing variations (TTVs) can provide useful information for systems observed by transit, as they allow us to put constraints on the masses and eccentricities of the observed planets, or even to constrain the existence of non-transi…
View article: The Stability Boundary of the Distant Scattered Disk
The Stability Boundary of the Distant Scattered Disk Open
The distant scattered disk is a vast population of trans-Neptunian minor bodies that orbit the Sun on highly elongated, long-period orbits. The orbital stability of scattered-disk objects (SDOs) is primarily controlled by a single paramete…
View article: Gravitational waves from dynamical tides in white dwarf binaries
Gravitational waves from dynamical tides in white dwarf binaries Open
We study the effect of tidal forcing on gravitational wave signals from tidally relaxed white dwarf pairs in the LISA, DECIGO and BBO frequency band (0.1 − 100 mHz). We show that for stars not in hydrostatic equilibrium (in their own rotat…
View article: Internal structure of white dwarfs from gravitational waves
Internal structure of white dwarfs from gravitational waves Open
We study the effect of tidal forcing on gravitational wave signals from tidally relaxed white dwarf pairs in the LISA, DECIGO and BBO frequency band ($0.1-100\,{\rm mHz}$). We show that for stars not in hydrostatic equilibrium (in their ow…
View article: SOPHIE velocimetry of Kepler transit candidates XVIII. Radial velocity confirmation, absolute masses and radii, and origin of the Kepler-419 multiplanetary system
SOPHIE velocimetry of Kepler transit candidates XVIII. Radial velocity confirmation, absolute masses and radii, and origin of the Kepler-419 multiplanetary system Open
Kepler-419 is a planetary system discovered by the Kepler photometry which is known to harbour two massive giant planets: [...] Here we present new radial velocity (RV) measurements secured over more than two years with the SOPHIE spectrog…
View article: Absolute masses and radii determination in multiplanetary systems without stellar models
Absolute masses and radii determination in multiplanetary systems without stellar models Open
The masses and radii of extrasolar planets are key observables for\nunderstanding their interior, formation and evolution. While transit photometry\nand Doppler spectroscopy are used to measure the radii and masses respectively\nof planets…
View article: DIVISION F COMMISSION 53: EXTRASOLAR PLANETS
DIVISION F COMMISSION 53: EXTRASOLAR PLANETS Open
The IAU Working Group on Extrasolar Planets (WGESP) was created by the Executive Council as a Working Group of Division III. This decision took place in June 1999, that is only 7 years after the discovery of planets around the pulsar PSR B…