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1 to 10 of 19 Results
A 220 – 320 GHz High Image Rejection Sideband Separating Receiver for Space-borne ObservatoriesEmbargoed
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...
Constraining the H2 column densities in the diffuse interstellar medium using dust extinction and Hi dataEmbargoed
Dec 4, 2023
Paul Goldsmith, 2023, "Constraining the H2 column densities in the diffuse interstellar medium using dust extinction and Hi data", https://doi.org/10.48577/jpl.50ED4Q, Astronomy & Astrophysics, JPL Open Repository
Context. Carbon monoxide (CO) is a poor tracer of H2 in the diffuse interstellar medium (ISM), where most of the carbon is not,incorporated into CO molecules unlike the situation at higher extinctions. Aims. We present a novel indirect method to constrain H2 column densities (NH2...
The ALMA-QUARKS survey: – I. Survey description and data reduction
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...
The ALMA-QUARKS survey: – I. Survey description and data reductionEmbargoed
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...
The ALMA-QUARKS survey: – I. Survey description and data reductionEmbargoed
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 (...
Turbulent Structure In Supernova Remnants G46.80.3 And G39.20.3 From THOR PolarimetryEmbargoed
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...
Cold Atomic gas identified by Hi self-absorption I. Cold atomic clouds toward giant molecular filamentsEmbargoed
Oct 2, 2023
Paul Goldsmith, 2023, "Cold Atomic gas identified by Hi self-absorption I. Cold atomic clouds toward giant molecular filaments", https://doi.org/10.48577/jpl.EMC6QN, Astronomy & Astrophysics, JPL Open Repository
Context. Stars form in the dense interiors of molecular clouds. The dynamics and physical properties of the atomic interstellar medium (ISM) set the conditions under which molecular clouds and eventually stars will form. It is therefore critical to investigate the relationship be...
ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): A forming quadruple system with continuum ‘ribbons’ and intricate outflowsEmbargoed
Jun 13, 2023
Paul Goldsmith, 2023, "ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): A forming quadruple system with continuum ‘ribbons’ and intricate outflows", https://doi.org/10.48577/jpl.DFEUE3, The Astrophyscial Journal, JPL Open Repository
One of the most poorly understood aspects of low-mass star formation is how multiple-star systems are formed. Here we present the results of Atacama Large Millimeter/submillimeter Array (ALMA) Band-6 observations towards a forming quadruple protostellar system, G206.93-16.61E2, i...
SURVEY OF CH3NH2 AND ITS FORMATION PROCESSEmbargoed
Jun 8, 2023
Paul Goldsmith, 2023, "SURVEY OF CH3NH2 AND ITS FORMATION PROCESS", https://doi.org/10.48577/jpl.HSIBWG, The Astrophyscial Journal, JPL Open Repository
We present the observational result of a precursor of glycine, methylamine (CH3NH2), together with methanol (CH3 OH) and methanimine (CH2 NH) towards the high-mass star-forming regions NGC6334I, G10.47+0.03, G31.41+0.3, and W51 e1/e2 using ALMA. The molecular abundances toward th...
Structure of the W3A Low Density Foreground Region
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...
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