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View article: Characterization of the Host Binary of the Directly Imaged Exoplanet HD 143811 AB b
Characterization of the Host Binary of the Directly Imaged Exoplanet HD 143811 AB b Open
HD 143811 AB is the host star to the directly imaged planet HD 143811 AB b, which was recently discovered using data from the Gemini Planet Imager and Keck NIRC2. A member of the Sco-Cen star-forming region with an age of 13 ± 4 Myr, HD 14…
View article: HD 143811 AB b: A Directly Imaged Planet Orbiting a Spectroscopic Binary in Sco-Cen
HD 143811 AB b: A Directly Imaged Planet Orbiting a Spectroscopic Binary in Sco-Cen Open
We present confirmation of HD 143811 AB b, a substellar companion to spectroscopic binary HD 143811 AB through direct imaging with the Gemini Planet Imager (GPI) and Keck NIRC2. HD 143811 AB was observed as a part of the GPI Exoplanet Surv…
View article: Characterization of the Host Binary of the Directly Imaged Exoplanet HD 143811 AB b
Characterization of the Host Binary of the Directly Imaged Exoplanet HD 143811 AB b Open
HD~143811~AB is the host star to the directly imaged planet HD~143811~AB~b, which was recently discovered using data from the Gemini Planet Imager and Keck NIRC2. A member of the Sco-Cen star-forming region with an age of $13 \pm 4$ Myr, H…
View article: HD 143811 AB b: A Directly Imaged Planet Orbiting a Spectroscopic Binary in Sco-Cen
HD 143811 AB b: A Directly Imaged Planet Orbiting a Spectroscopic Binary in Sco-Cen Open
We present confirmation of HD 143811 AB b, a substellar companion to spectroscopic binary HD 143811 AB through direct imaging with the Gemini Planet Imager (GPI) and Keck NIRC2. HD 143811 AB was observed as a part of the Gemini Planet Imag…
View article: Quenching of galaxies at cosmic noon
Quenching of galaxies at cosmic noon Open
Context. We identified and analysed massive quiescent galaxies (MQGs) at z ≈ 3.1 within the 2 deg 2 COSMOS field and explored the effect of the galaxy environment on quenching processes. By examining the variation in the quenched fraction …
View article: The MUSE eXtremely Deep Field
The MUSE eXtremely Deep Field Open
Context. The hydrogen Lyman-alpha (Ly α ) line, the brightest rest-frame ultraviolet line of high-redshift galaxies, exhibits a large variety of shapes, which is due to factors at different scales, from the interstellar medium to the inter…
View article: Mass and light in galaxy clusters: The case of Abell 370
Mass and light in galaxy clusters: The case of Abell 370 Open
In the cold dark matter (CDM) paradigm, an association between the hypothetic dark matter (DM) and its stellar counterpart is expected. However, parametric strong-lensing studies of galaxy clusters often display misleading features: DM com…
View article: Quenching of Galaxies at Cosmic Noon: Understanding the Effect of Environment
Quenching of Galaxies at Cosmic Noon: Understanding the Effect of Environment Open
The aim of this study is to identify quiescent galaxies in the 2-deg$^2$ COSMOS field at $z \sim 3.1$ and analyze their environment. Using data from the ODIN survey and COSMOS2020 catalog, we identify 24 massive quiescent galaxies (MQGs) w…
View article: The VANDELS Survey: Star formation and quenching in two over-densities at 3 < z < 4
The VANDELS Survey: Star formation and quenching in two over-densities at 3 < z < 4 Open
Context: Understanding galaxy evolution in dense environments, particularly proto-clusters, is crucial for studying mechanisms driving star formation and quenching. Aims: This study examines how two proto-cluster over-densities at 3 < z < …
View article: The VANDELS Survey: Star formation and quenching in two over-densities at 3 < <i>z</i> < 4
The VANDELS Survey: Star formation and quenching in two over-densities at 3 < <i>z</i> < 4 Open
Context. Exploring galaxy evolution in dense environments, such as proto-clusters, is pivotal for understanding the mechanisms that drive star formation and the quenching of star formation. Aims. This study provides insights into how two o…
View article: Efficient Survey Design for Finding High-redshift Galaxies with JWST
Efficient Survey Design for Finding High-redshift Galaxies with JWST Open
Several large JWST blank field observing programs have not yet discovered the first galaxies expected to form at 15 ≤ z ≤ 20. This has motivated the search for more effective survey strategies that will be able to effectively probe this re…
View article: Testing the Interaction between a Substellar Companion and a Debris Disk in the HR 2562 System
Testing the Interaction between a Substellar Companion and a Debris Disk in the HR 2562 System Open
The HR 2562 system is a rare case where a brown dwarf companion resides in a cleared inner hole of a debris disk, offering invaluable opportunities to study the dynamical interaction between a substellar companion and a dusty disk. We pres…
View article: Testing the Interaction Between a Substellar Companion and a Debris Disk in the HR 2562 System
Testing the Interaction Between a Substellar Companion and a Debris Disk in the HR 2562 System Open
The HR 2562 system is a rare case where a brown dwarf companion resides in a cleared inner hole of a debris disk, offering invaluable opportunities to study the dynamical interaction between a substellar companion and a dusty disk. We pres…
View article: Joint Observatories Kavli Science Forum
Joint Observatories Kavli Science Forum Open
The Joint Observatories Kavli Science Forum in Chile was organised in a hybrid mode with the aim of encouraging collaborations, not only with the Chilean institutions but also between the different observing facilities based in Chile. The …
View article: The VANDELS survey: global properties of CIII]$\lambda$1908\r{A} emitting star-forming galaxies at z$\sim$3
The VANDELS survey: global properties of CIII]$\lambda$1908\r{A} emitting star-forming galaxies at z$\sim$3 Open
We study the mean properties of a large representative sample of 217 galaxies\nshowing CIII] emission at $2<z<4$, selected from a parent sample of $\\sim$750\nmain-sequence star-forming galaxies in the VANDELS survey. These CIII] emitters\…
View article: Multiband Polarimetric Imaging of HR 4796A with the Gemini Planet Imager
Multiband Polarimetric Imaging of HR 4796A with the Gemini Planet Imager Open
HR4796A hosts a well-studied debris disk with a long history due to its high fractional luminosity and favorable inclination, which facilitate both unresolved and resolved observations. We present new J - and K 1 -band images of the resolv…
View article: Debris Disk Results from the Gemini Planet Imager Exoplanet Survey's Polarimetric Imaging Campaign
Debris Disk Results from the Gemini Planet Imager Exoplanet Survey's Polarimetric Imaging Campaign Open
We report the results of a ∼4 yr direct imaging survey of 104 stars to resolve and characterize circumstellar debris disks in scattered light as part of the Gemini Planet Imager (GPI) Exoplanet Survey. We targeted nearby (≲150 pc), young (…
View article: HD 165054: An Astrometric Calibration Field for High-contrast Imagers in Baade’s Window
HD 165054: An Astrometric Calibration Field for High-contrast Imagers in Baade’s Window Open
We present a study of the HD 165054 astrometric calibration field that has been periodically observed with the Gemini Planet Imager (GPI). HD 165054 is a bright star within Baade’s Window, a region of the galactic plane with relatively low…
View article: Debris Disk Results from the Gemini Planet Imager Exoplanet Survey's Polarimetric Imaging Campaign
Debris Disk Results from the Gemini Planet Imager Exoplanet Survey's Polarimetric Imaging Campaign Open
We report the results of a ${\sim}4$-year direct imaging survey of 104 stars to resolve and characterize circumstellar debris disks in scattered light as part of the Gemini Planet Imager Exoplanet Survey. We targeted nearby (${\lesssim}150…
View article: First Resolved Scattered-light Images of Four Debris Disks in Scorpius-Centaurus with the Gemini Planet Imager
First Resolved Scattered-light Images of Four Debris Disks in Scorpius-Centaurus with the Gemini Planet Imager Open
We present the first spatially resolved scattered-light images of four debris disks around members of the Scorpius-Centaurus (Sco-Cen) OB association with high-contrast imaging and polarimetry using the Gemini Planet Imager (GPI). All four…
View article: Asymmetries in adaptive optics point spread functions
Asymmetries in adaptive optics point spread functions Open
An explanation for the origin of asymmetry along the preferential axis of the PSF of an AO system is developed. When phase errors from high altitude turbulence scintillate due to Fresnel propagation, wavefront amplitude errors may be spati…
View article: An Exo–Kuiper Belt with an Extended Halo around HD 191089 in Scattered Light
An Exo–Kuiper Belt with an Extended Halo around HD 191089 in Scattered Light Open
We have obtained Hubble Space Telescope STIS and NICMOS and Gemini /GPI scattered-light images of the HD 191089 debris disk. We identify two spatial components: a ring resembling the Kuiper Belt in radial extent (FWHM ∼ 25 au, centered at …
View article: The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics from 10 to 100 au
The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics from 10 to 100 au Open
We present a statistical analysis of the first 300 stars observed by the Gemini Planet Imager Exoplanet Survey. This subsample includes six detected planets and three brown dwarfs; from these detections and our contrast curves we infer the…
View article: Emission Line Metallicities From The Faint Infrared Grism Survey
Emission Line Metallicities From The Faint Infrared Grism Survey Open
We have derived direct measurement gas-phase metallicities of $7.4 < 12 + \log(O/H) < 8.4$ for 14 Emission Line Galaxies (ELGs) at $0.3 < z < 0.8$ from the Faint Infrared Grism Survey (FIGS). Using slitless G102 grism spectroscopy and VLT/…
View article: Raman-scattered laser guide-star photons to monitor the scatter of astronomical telescope mirrors
Raman-scattered laser guide-star photons to monitor the scatter of astronomical telescope mirrors Open
\nThe first observations of laser guide-star photons that are Raman-scattered by air molecules above the Very Large Telescope (VLT) were reported in June 2017. The initial detection came from the Multi-Unit Spectroscopic Explorer (MUSE) op…
View article: Dynamical Constraints on the HR 8799 Planets with GPI
Dynamical Constraints on the HR 8799 Planets with GPI Open
The HR 8799 system uniquely harbors four young super-Jupiters whose orbits can provide insights into the system’s dynamical history and constrain the masses of the planets themselves. Using the Gemini Planet Imager, we obtained down to one…
View article: Dynamical Constraints on the HR 8799 Planets with GPI
Dynamical Constraints on the HR 8799 Planets with GPI Open
The HR 8799 system uniquely harbors four young super-Jupiters whose orbits can provide insights into the system's dynamical history and constrain the masses of the planets themselves. Using the Gemini Planet Imager (GPI), we obtained down …
View article: Direct Imaging of the HD 35841 Debris Disk: A Polarized Dust Ring from Gemini Planet Imager and an Outer Halo from HST/STIS
Direct Imaging of the HD 35841 Debris Disk: A Polarized Dust Ring from Gemini Planet Imager and an Outer Halo from HST/STIS Open
We present new high resolution imaging of a light-scattering dust ring and halo around the young star HD 35841. Using spectroscopic and polarimetric data from the Gemini Planet Imager in H -band (1.6 μ m), we detect the highly inclined ( i…