1 to 10 of 13 Results
Dec 28, 2023
Paul Goldsmith, 2023, "A 220 – 320 GHz High Image Rejection Sideband Separating Receiver for Space-borne Observatories", https://doi.org/10.48577/jpl.GKSHJR, IEEE Transaction on Terahertz Science and Technology, JPL Open Repository
This work presents a novel terahertz THz sideband separating receiver (SSR) implemented in silicon germanium (SiGe) 0.13 μm BiCMOS technology that covers a broad frequency range of 220-320 GHz. The proposed architecture provides simultaneous observation of spectral lines with hig... |
Dec 11, 2023
Ashish Goel, 2023, "Modeling Science Return from the Lunar Crater Radio Telescope on the Far Side of the Moon", https://doi.org/10.48577/jpl.LDQUPK, Philosophical Transactions of the Royal Society A, JPL Open Repository
The era following the separation of CMB photons from matter, until the emergence of the first stars and galaxies, is known as the Cosmic Dark Ages. The study of the electromagnetic radiation emitted by neutral hydrogen at the 21~cm rest wavelength is the only way to explore this... |
Nov 27, 2023
Paul Goldsmith, 2023, "The ALMA-QUARKS survey: – I. Survey description and data reduction", https://doi.org/10.48577/jpl.RI8OMQ, The Astrophysical Journal Letters, JPL Open Repository
In the Turbulent Core model, massive prestellar cores are suggested as the precursors of massive stars. However, only a handful of these candidates have been discovered so far. We conducted highresolution ALMA observations at Band 3 (∼ 2′′, 6000 au) and Band 6 (∼ 0.3′′, 900 au) t... |
Nov 27, 2023
Paul Goldsmith, 2023, "The ALMA-QUARKS survey: – I. Survey description and data reduction", https://doi.org/10.48577/jpl.V9PABL, The Astrophysical Journal Letters, JPL Open Repository
In the Turbulent Core model, massive prestellar cores are suggested as the precursors of massive stars. However, only a handful of these candidates have been discovered so far. We conducted highresolution ALMA observations at Band 3 (∼ 2′′, 6000 au) and Band 6 (∼ 0.3′′, 900 au) t... |
Nov 16, 2023
Paul Goldsmith, 2023, "The ALMA-QUARKS survey: – I. Survey description and data reduction", https://doi.org/10.48577/jpl.JWUPEE, Research in Astonomy and Astrophysics, JPL Open Repository
Abstract This paper presents an overview of the QUARKS survey, which stands for ‘Querying Underlying mechanisms of massive star formation with ALMA-Resolved gas Kinematics and Structures’. The QUARKS survey is observing 139 massive clumps covered by 156 pointings at ALMA Band 6 (... |
Oct 2, 2023
Paul Goldsmith, 2023, "Turbulent Structure In Supernova Remnants G46.80.3 And G39.20.3 From THOR Polarimetry", https://doi.org/10.48577/jpl.RDVJ4Y, The Astrophyscial Journal, JPL Open Repository
We present the continued analysis of polarization nd Faraday rotation for the supernova remnants (SNRs) G46.80.3 and G39.20.3 in L-band (1-2 GHz) radio continuum in The HI/OH/Recombination line (THOR) survey. In this work, we present our investigation of Faraday depth fluctuation... |
May 22, 2023
Paul Goldsmith, 2023, "Structure of the W3A Low Density Foreground Region", https://doi.org/10.48577/jpl.UFXHXJ, The Astrophyscial Journal, JPL Open Repository
We present analysis of [O i] 63 µm and CO J = 5–4 and 8–7 multi–position data in the W3A region 8 and use it to develop a model for the extended low–density foreground gas that produces absorption 9 features in the [O i] and J = 5–4 CO lines. We employ the extinction to the excit... |
Apr 24, 2023
Paul Goldsmith, 2023, "Updated Inventory of Carbon Monoxide in The Taurus Molecular Cloud", https://doi.org/10.48577/jpl.MJ9KRX, Research in Astronomy and Astrophysics, JPL Open Repository
Abstract The most extensive survey of carbon monoxide (CO) gas in the Taurus molecular cloud relied on 12CO and 13CO J = 1 → 0 emission only, distinguishing the region where 12CO is detected without 13CO (named mask 1 region) from the one where both are detected (mask 2 region) (... |
Mar 13, 2023
Paul Goldsmith, 2023, "Spiral Arms are Metal Freeways: Azimuthal Gas-Phase Metallicity Variations in Flocculent Disks in the FIRE-2 Cosmological Zoom-in Simulations", https://doi.org/10.48577/jpl.YOJ8OI, The Astrophyscial Journal, JPL Open Repository
We examine the azimuthal variations in gas-phase metallicity profiles in simulated Milky Way mass disk galaxies from the Feedback in Realistic Environments (FIRE-2) cosmological zoom-in simulation suite, which includes a sub-grid turbulent metal mixing model. We produce spatially... |
Feb 16, 2023
Paul Goldsmith, 2023, "ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): Density Structure of Centrally Condensed Prestellar Cores from Multi-scale Observations", https://doi.org/10.48577/jpl.4VNY3H, The Astrophyscial Journal, JPL Open Repository
Starless cores represent the initial stage of evolution toward (proto)star formation, and a subset of them, known as prestellar cores, with high density (∼ 106 cm−3 or higher) and being centrally concentrated are expected to be embryos of (proto)stars. Determining the density pro... |
