GPI 2.0: Characterizing Self-Luminous Exoplanets Through Low-Resolution Infrared Spectroscopy

Posted by klaurent Stanford

Kavli Affiliate: Arlene Aleman | Summary:Direct imaging characterization of extrasolar planets is often done at low spectral resolution. We model the spectrograph for the Gemini Planet Imager upgrade (GPI 2.0) and assess the instrument’s potential for allowing observers to constrain exoplanet properties through analysis of near-infrared spectra. We simulated noisy observations followed by calculations of […]


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Reconstructing Large-scale Temperature Profiles around $zsim 6$ Quasars

Posted by klaurent Chicago

Kavli Affiliate: Nickolay Y. Gnedin | First 5 Authors: Huanqing Chen, Rupert Croft, Nickolay Y. Gnedin, , | Summary: High-redshift quasars ionize HeII into HeIII around them, heating the IGM in the process and creating large regions with elevated temperature. In this work, we demonstrate a method based on a convolutional neural network (CNN) to […]


Continue.. Reconstructing Large-scale Temperature Profiles around $zsim 6$ Quasars

Accretion Burst Echoes as Probes of Protostellar Environments and Episodic Mass Assembly

Posted by klaurent Peking

Kavli Affiliate: Gregory J. Herczeg | First 5 Authors: Logan Francis, Doug Johnstone, Jeong-Eun Lee, Gregory J. Herczeg, Feng Long | Summary: Protostars likely accrete material at a highly time variable rate, however, measurements of accretion variability from the youngest protostars are rare, as they are still deeply embedded within their envelopes. Sub-mm/mm observations can […]


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Hot Carrier Thermalization and Josephson Inductance Thermometry in a Graphene-based Microwave Circuit

Posted by klaurent Caltech

Kavli Affiliate: Keith Schwab | Summary:Due to its exceptional electronic and thermal properties, graphene is a key material for bolometry, calorimetry, and photon detection. However, despite graphene’s relatively simple electronic structure, the physical processes responsible for the transport of heat from the electrons to the lattice are experimentally still elusive. Here, we measure the thermal […]


Continue.. Hot Carrier Thermalization and Josephson Inductance Thermometry in a Graphene-based Microwave Circuit

Hot Carrier Thermalization and Josephson Inductance Thermometry in a Graphene-based Microwave Circuit

Posted by klaurent Caltech

Kavli Affiliate: Keith C. Schwab | First 5 Authors: Raj Katti, Harpreet Arora, Olli-Pentti Saira, Kenji Watanabe, Takashi Taniguchi | Summary: Due to its exceptional electronic and thermal properties, graphene is a key material for bolometry, calorimetry, and photon detection. However, despite graphene’s relatively simple electronic structure, the physical processes responsible for the transport of […]


Continue.. Hot Carrier Thermalization and Josephson Inductance Thermometry in a Graphene-based Microwave Circuit