11 to 20 of 22 Results
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... |
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... |
May 22, 2023
Paul Goldsmith, 2023, "A panoptic view of the Taurus molecular cloud I. The cloud dynamics revealed by gas emission and 3D dust", https://doi.org/10.48577/jpl.PATWIZ, Astronomy & Astrophysics, JPL Open Repository
We present a study of the three-dimensional (3D) distribution of interstellar dust derived from stellar extinction observations toward the Taurus molecular cloud (MC) and its relation with the neutral atomic hydrogen (Hi) emission at 21 cm wavelength and the carbon monoxide 12CO... |
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... |
Mar 6, 2023
Paul Goldsmith, 2023, "CO enhancement by magnetohydrodynamic waves", https://doi.org/10.48577/jpl.86FVL1, Astronomy & Astrophysics, JPL Open Repository
Context. The formation of molecular gas in interstellar clouds is a slow process, but can be enhanced by gas compression. Magnohydrodynamic (MHD) waves can create compressed quasi-periodic linear structures, referred to as striations. Striations are observed at column densities w... |
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... |
Feb 1, 2023
Paul Goldsmith, 2023, "Tri-band receivers for the INAF radio telescopes: from procurement to acceptance tests", https://doi.org/10.48577/jpl.4TDQPA, Conference Proceedings URSI General Assembly, JPL Open Repository
In less than 30 months, three different tri-band receivers have been developed for the three Italian radio telescopes. The receivers allow simultaneous observation of three different frequency bands: 18-26 GHz, 34-50 GHz and 80- 116 GHz. Each receiver delivers at its output ports... |
Jan 12, 2023
Paul Goldsmith, 2023, "ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions – XV. Steady Accretion from Global Collapse to Core Feeding in Massive Hub-filament System SDC335", https://doi.org/10.48577/jpl.SQIJXN, Monthly Notices of the Royal Astronomical Society, JPL Open Repository
We present ALMA Band-3/7 observations towards “the Heart” of a massive hub-filament system (HFS) SDC335, to investigate its fragmentation and accretion. At a resolution of 0.03 pc, 3mm continuum emission resolves two massive dense cores MM1 and MM2, with 383¹¸234, and 120 𝑀sun ... |
Jan 10, 2023
Paul Goldsmith, 2023, "ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions -XIII. Ongoing triggered star formation within clump-fed scenario found in the massive (∼ 1500 M⊙) clump", https://doi.org/10.48577/jpl.QR2CAZ, Monthly Notices of the Royal Astronomical Society, JPL Open Repository
Whether ionization feedback triggers the formation of massive stars is highly debated. Using ALMA 3 mm observations with a spatial resolution of ∼ 0.05 pc and a mass sensitivity of 1.1 M⊙ beam−1 at 20 K, we investigate the star formation and gas flow structures within the ionizin... |
