A5013910456- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Planetary Science and Exploration
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Space Exploration and Technology
- Space Satellite Systems and Control
- Space exploration and regulation
- Calibration and Measurement Techniques
University of Victoria
2021-2024
Abstract The Gemini Planet Imager (GPI) has excelled in imaging debris disks the near-infrared. GPI Exoplanet Survey imaged 24 polarized H -band light, while other programs observed half of these J and/or K 1 bands. Using data, we present a uniform analysis morphology each disk to find asymmetries suggestive perturbations, particularly those due planet–disk interactions. multiwavelength surface brightness, color, and geometry permit identification any such as warps or offsets from central...
ABSTRACT Spatially resolved images of debris discs are necessary to determine disc morphological properties and the scattering phase function (SPF) thatantifies brightness scattered light as a angle. Current high-contrast imaging instruments have successfully several dozens around other stars, but few studies investigated trends in scattered-light, population uniform consistent manner. We combined Karhunen-Loeve Image Projection (KLIP) with radiative-transfer forward modelling order obtain...
Abstract As next-generation imaging instruments and interferometers search for planets closer to their stars, they must contend with increasing orbital motion longer integration times. These compounding effects make it difficult detect faint but also present an opportunity. Increased makes possible move the into domain, where direct images can be freely combined radial velocity proper anomaly, even without a confirmed detection in any single epoch. In this paper, we fast differentiable...
HD 106906 is a young, binary stellar system, located in the Lower Centaurus Crux (LCC) group. This system unique among discovered systems that it contains an asymmetrical debris disk, as well 11 M$_{Jup}$ planet companion, at separation of $\sim$735 AU. Only handful other are known to contain both disk and directly imaged planet, where only one which has apparently been scattered. The nearly edge on, extends roughly $>$500 AU, previous studies with HST have shown outer regions high...
We observed the nearly edge-on debris disk system HD 111520 at $J$, $H$, & $K1$ near infrared (NIR) bands using both spectral and polarization modes of Gemini Planet Imager (GPI). With these new observations, we have performed an empirical analysis in order to better understand morphology its highly asymmetrical nature. find that features a large brightness radial asymmetry, most prominent shorter wavelengths. also location peak polarized intensity differs on either side star by 11 AU,...
Debris disks are dusty, optically thin structures around main sequence stars. HD 106906AB is a short-period stellar binary, host to wide separation planet, 106906b, and debris disk. Only few known systems include disk directly imaged 106906 the only one in which planet exterior The edge-on highly asymmetric scattered light. Here we resolve structure at resolution of 0.38" (39 au) with Atacama Large Millimeter/submillimeter Array (ALMA) wavelength 1.3 mm. We model both narrow broad ring...
Spatially-resolved images of debris disks are necessary to determine disk morphological properties and the scattering phase function (SPF) which quantifies brightness scattered light as a angle. Current high-contrast imaging instruments have successfully resolved several dozens around other stars, but few studies investigated trends in scattered-light, population uniform consistent manner. We combined Karhunen-Loeve Image Projection (KLIP) with radiative-transfer forward modeling order...
The Atmospheric Dispersion Corrector (ADC) of the Gemini Planet Imager (GPI) corrects chromatic dispersion caused by differential atmospheric refraction (DAR), making it an important optic for exoplanet observation. Despite requiring less than 5 mas residual DAR to avoid potentially affecting coronagraph, GPI ADC averages $\sim7$ and $\sim11$ in $H$ $J$ band respectively. We analyzed data those bands find explanations underperformance. found model uses predict underestimates humidity's...
Abstract The 16 Myr old A0V star HD 156623 in the Scorpius–Centaurus association hosts a high-fractional-luminosity debris disk, recently resolved scattered light for first time by Gemini Planet Imager (GPI) polarized intensity only. We present new analysis of GPI H -band polarimetric detection with particular interest its unique morphology. This disk lacks visible inner clearing, unlike majority low-inclination disks sample and Sco-Cen, it is known to contain CO gas, positioning as...
Abstract Debris disks, which are optically thin, dusty disks around main-sequence stars, often found to have structures and/or asymmetries associated with planet–disk interactions. disk morphologies can hence be used as probes for planets in these systems, unlikely detected other current exoplanet detection methods. In this study we take a look at the very asymmetrical debris HD 111520, harbours several signs of perturbation such “fork”-like structure NW, well 4° warp from midplane on either...
Debris disks, which are optically thin, dusty disks around main sequence stars, often found to have structures and/or asymmetries associated with planet-disk interactions. disk morphologies can hence be used as probes for planets in these systems unlikely detected other current exoplanet detection methods. In this study we take a look at the very asymmetrical debris HD 111520, harbours several signs of perturbation such ``fork"-like structure NW, well 4$^{\circ}$ warp from midplane on either...
Abstract The Gemini Planet Imager (GPI), an extreme adaptive optics instrument on South, has been pivotal in the advancement of debris-disk field. Over past decade, GPI observed tens debris disks at near-infrared wavelengths both polarized and total intensity as a part several direct-imaging surveys. Here we discuss uniform reductions J -, H - K 1-band observations, specifically intensity. This includes 24 observations band, 10 debris-disks band 11 disk 1 band. Additionally, all three...
The 16 Myr-old A0V star HD 156623 in the Scorpius--Centaurus association hosts a high-fractional-luminosity debris disk, recently resolved scattered light for first time by Gemini Planet Imager (GPI) polarized intensity. We present new analysis of GPI H-band polarimetric detection with particular interest its unique morphology. This disk lacks visible inner clearing, unlike majority low-inclination disks sample and Sco-Cen, it is known to contain CO gas, positioning as candidate ``hybrid''...
The Gemini Planet Imager (GPI) has excelled in imaging debris disks the near-infrared. GPI Exoplanet Survey (GPIES) imaged twenty-four polarized $H$-band light, while other programs observed half of these $J$- and/or $K1$-bands. Using data, we present a uniform analysis morphology each disk to find asymmetries suggestive perturbations, particularly those due planet-disk interactions. multi-wavelength surface brightness, color and geometry permit identification any such as warps or offsets...
Debris disks are dusty, optically thin structures around main sequence stars. HD 106906AB is a short-period stellar binary, host to wide separation planet, 106906b, and debris disk. Only few known systems include disk directly imaged 106906 the only one in which planet exterior The edge-on highly asymmetric scattered light. Here we resolve structure at resolution of 0.38" (39 au) with Atacama Large Millimeter/submillimeter Array (ALMA) wavelength 1.3 mm. We model both narrow broad ring...