Adsorption of volatiles on dust grains in protoplanetary disks

Posted by klaurent Peking

Kavli Affiliate: Lile Wang |Summary:The adsorption of volatile molecules onto dust grain surfaces fundamentally influences dust-related processes, including condensation of gas-phase molecules, dust coagulation, and planet formation in protoplanetary disks. Using advanced ab-initio density functional theory with r$^2$SCAN+rVV10 van der Waals functionals, we calculate adsorption energies of H$_2$, H$_2$O, and CO on carbonaceous (graphene, amorphous […]


Continue.. Adsorption of volatiles on dust grains in protoplanetary disks

TIME Commissioning Observations: I. Mapping Dust and Molecular Gas in the Sgr A Molecular Cloud Complex at the Galactic Center

Posted by klaurent Caltech

Kavli Affiliate: James Bock | Summary:We present the processing of an observation of Sagittarius A (Sgr A) with the Tomographic Ionized-carbon Mapping Experiment (TIME), part of the 2021-2022 commissioning run to verify TIME’s hyperspectral imaging capabilities for future line-intensity mapping. Using an observation of Jupiter to calibrate detector gains and pointing offsets, we process the […]


Continue.. TIME Commissioning Observations: I. Mapping Dust and Molecular Gas in the Sgr A Molecular Cloud Complex at the Galactic Center

TIME Commissioning Observations: I. Mapping Dust and Molecular Gas in the Sgr A Molecular Cloud Complex at the Galactic Center

Posted by klaurent Caltech

Kavli Affiliate: James Bock| First 5 Authors: Selina F. Yang, Selina F. Yang, , , | Summary:We present the processing of an observation of Sagittarius A (Sgr A) with the Tomographic Ionized-carbon Mapping Experiment (TIME), part of the 2021-2022 commissioning run to verify TIME’s hyperspectral imaging capabilities for future line-intensity mapping. Using an observation of […]


Continue.. TIME Commissioning Observations: I. Mapping Dust and Molecular Gas in the Sgr A Molecular Cloud Complex at the Galactic Center

Development of a planar cable-driven parallel robot for submillimeter and terahertz beam mapping measurements

Posted by klaurent Caltech

Kavli Affiliate: James Bock | Summary:The spatial sensitivity pattern of millimeter-wavelength receivers is an important diagnostic of performance and is affected by the alignment of coupling optics. Characterization can be challenging in the field, particularly in the decentered and tightly packed optical configurations that are employed for many astronomical millimeter-wave cameras. In this paper, we […]


Continue.. Development of a planar cable-driven parallel robot for submillimeter and terahertz beam mapping measurements

Development of a planar cable-driven parallel robot for submillimeter and terahertz beam mapping measurements

Posted by klaurent Caltech

Kavli Affiliate: James Bock | Summary:The spatial sensitivity pattern of millimeter-wavelength receivers is an important diagnostic of performance and is affected by the alignment of coupling optics. Characterization can be challenging in the field, particularly in the decentered and tightly packed optical configurations that are employed for many astronomical millimeter-wave cameras. In this paper, we […]


Continue.. Development of a planar cable-driven parallel robot for submillimeter and terahertz beam mapping measurements

Design of a Six-band, 2.4-Octave (80–420 GHz) Hierarchically Summed Phased-Array Slot-Dipole Antenna Array for NEW-MUSIC

Posted by klaurent Caltech

Kavli Affiliate: Sunil Golwala | Summary:The Next-generation Extended Wavelength Multi-band Sub/millimeter Inductance Camera (NEW-MUSIC), located on the Leighton Chajnantor Telescope (LCT), will be the first six-band trans-millimeter wave polarimeter. This paper proposes a broadband, hierarchical phased-array antenna with integrated band-defining filters necessary to realize NEW-MUSIC. It covers a spectral bandwidth of 2.4 octaves from 80~GHz […]


Continue.. Design of a Six-band, 2.4-Octave (80–420 GHz) Hierarchically Summed Phased-Array Slot-Dipole Antenna Array for NEW-MUSIC

Improved Modeling of Quasi-Static Thermal and Optical Response of Lumped-Element Aluminum Manganese KIDs

Posted by klaurent Caltech

Kavli Affiliate: Sunil Golwala | Summary:We report on the optical characterization of the AlMn kinetic inductance detectors (KIDs) in development for use in the Next-generation Extended Wavelength-MUltiband Sub/millimeter Inductance Camera (NEW-MUSIC) on the Leighton Chajnantor Telescope (LCT). NEW-MUSIC will cover 80-420 GHz, split into six spectral bands, with polarimetry. This broad spectral coverage will enable […]


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Continuum variability in multi-epoch quasar spectra from the Sloan Digital Sky Survey

Posted by klaurent Peking

Kavli Affiliate: Luis Ho| First 5 Authors: Minjin Kim, Minjin Kim, , , | Summary:We examine the continuum variability of active galactic nuclei (AGNs) by analyzing the multi-epoch spectroscopic data from the Sloan Digital Sky Survey. To achieve this, we utilized approximately 2 million spectroscopy pairwise combinations observed across different epochs for $sim90,000$ AGNs. We […]


Continue.. Continuum variability in multi-epoch quasar spectra from the Sloan Digital Sky Survey

All-nitride superconducting qubits based on atomic layer deposition

Posted by klaurent Cornell

Kavli Affiliate: David Muller| First 5 Authors: Danqing Wang, Danqing Wang, , , | Summary:The development of large-scale quantum processors benefits from superconducting qubits that can operate at elevated temperatures and be fabricated with scalable, foundry-compatible processes. Atomic layer deposition (ALD) is increasingly being adopted as an industrial standard for thin-film growth, particularly in applications […]


Continue.. All-nitride superconducting qubits based on atomic layer deposition

All-nitride superconducting qubits based on atomic layer deposition

Posted by klaurent Cornell

Kavli Affiliate: David Muller| First 5 Authors: Danqing Wang, Danqing Wang, , , | Summary:The development of large-scale quantum processors benefits from superconducting qubits that can operate at elevated temperatures and be fabricated with scalable, foundry-compatible processes. Atomic layer deposition (ALD) is increasingly being adopted as an industrial standard for thin-film growth, particularly in applications […]


Continue.. All-nitride superconducting qubits based on atomic layer deposition