HR8799: Imaging a System of Exoplanets

Konopacky, Quinn; Barman, Travis

doi:10.1007/978-3-319-30648-3_36-1

Cited by 2 publications

(2 citation statements)

References 97 publications

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“…The HR 8799 system is currently the only example of a multiple planet system detected via direct imaging (Marois et al 2008Konopacky & Barman 2018). The host star is a λ Bootis star that exhibits γ Doradus variability (Zerbi et al 1999;Gray & Kaye 1999).…”

Section: Hr 8799mentioning

confidence: 99%

The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics From 10-100 AU

Nielsen,

De Rosa,

Macintosh

et al. 2019

Preprint

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We present a statistical analysis of the first 300 stars observed by the Gemini Planet Imager Exoplanet Survey (GPIES). This subsample includes six detected planets and three brown dwarfs; from these detections and our contrast curves we infer the underlying distributions of substellar companions with respect to their mass, semi-major axis, and host stellar mass. We uncover a strong correlation between planet occurrence rate and host star mass, with stars M * > 1.5M more likely to host planets with masses between 2-13M Jup and semi-major axes of 3-100au at 99.92% confidence. We fit a double power-law model in planet mass (m) and semi-major axis (a) for planet populations around high-mass stars (M * > 1.5M ) of the form d 2 N/(dm da)∝m α a β , finding α = −2.4 ± 0.8 and β = −2.0 ± 0.5, and an integrated occurrence rate of 9 +5 −4 % between 5-13M Jup and 10-100au. A significantly lower occurrence rate is obtained for brown dwarfs around all stars, with 0.8 +0.8 −0.5 % of stars hosting a brown dwarf companion between 13-80M Jup and 10-100au. Brown dwarfs also appear to be distributed differently in mass and semi-major axis compared to giant planets; whereas giant planets follow a bottom-heavy mass distribution and favor smaller semi-major axes, brown dwarfs exhibit just the opposite behaviors. Comparing to studies of short-period giant planets from the RV method, our results are consistent with a peak in occurrence of giant planets between ∼1-10au. We discuss how these trends, including the preference of giant planets for high-mass host stars, point to formation of giant planets by core/pebble accretion, and formation of brown dwarfs by gravitational instability.

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Section: Hr 8799mentioning

confidence: 99%

The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics From 10-100 AU

Nielsen,

De Rosa,

Macintosh

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…Orbital monitoring of directly imaged planets also provides constraints on the dynamical evolution of young planetary systems. For example, coplanarity and the prevalence of orbital resonances in multi-planet systems inform planet formation and migration models (e.g., Konopacky & Barman 2019). Alignment (or misalignment) of planetary orbits with the stellar spin axis and/or the circumstellar disk plane informs the history of dynamical interactions within the system (e.g., Brandt et al 2021;Balmer et al 2022).…”

Section: What Do We Learn From Hci Planet Detections?mentioning

confidence: 99%

An Introduction to High Contrast Differential Imaging of Exoplanets and Disks

Follette

2023

PASP

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This tutorial is an introduction to High-Contrast Imaging, a technique that enables astronomers to isolate light from faint planets and/or circumstellar disks that would otherwise be lost amidst the light of their host stars. Although technically challenging, high-contrast imaging allows for direct characterization of the properties of circumstellar sources. The intent of the article is to provide newcomers to the field a general overview of the terminology, observational considerations, data reduction strategies, and analysis techniques high-contrast imagers employ to identify, vet, and characterize planet and disk candidates.

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HR8799: Imaging a System of Exoplanets

Cited by 2 publications

References 97 publications

The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics From 10-100 AU

The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics From 10-100 AU

An Introduction to High Contrast Differential Imaging of Exoplanets and Disks

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