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Diffuse Molecular Galactic Disk Survey
Is the Broad 18cm OH Emission ‘Disk’ in Concordance with Galactic Structure? We recently published the GBT discovery paper of a large amount of diffuse molecular gas, previously undetected by CO surveys (Busch et al. 2021). Present in sightlines towards the Outer Galaxy was an extremely faint (~2-4 mK/channel) signal of 1667 MHz OH emission…
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GLUCOSE — The GBT L1544 Unbiased Complex Organics SurvEy
A high spectral and spacial sensitivity line survey will be carried out toward the prestellar core L1544 in the chemically rich Q-band (38-48.2 GHz), which has never before been attempted. Within the band are numerous energetically favorable complex organic molecule (COM) transitions compared to those in other surveys at higher frequency (i.e., the 3mm band),…
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GDIGS-Low — GBT Diffuse Ionized Gas Survey at Low Frequencies
GDIGS-Low is a survey that will map radio recombination line (RRL) emission at 800 and 340 MHz over the inner Galactic plane (32° > ℓ > -5°). GDIGS-Low is a complement to the GDIGS survey. Through GDIGS-Low we will study the Warm Ionized Medium (WIM) and aim to answer (i) What are the physical properties…
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MEDIUM — Molecular Exploration of the Diffuse Interstellar mediUM
Project Abstract (AGBT21B_316) MEDIUM is a GBT Large Project to conduct a comprehensive, unbiased molecular absorption survey of diffuse clouds occulting the distant, centimeter-bright Galactic H II region W49N, with the overarching goals of greatly enlarging the molecular inventory of the diffuse interstellar medium and understanding its molecular complexity. Recent observations have yielded detection of…
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DEGAS — Dense Extragalactic GBT+Argus Survey
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EDGE — Extragalactic Database for Galaxy Evolution
A Representative Survey of the z=0 Universe with Full IFU Spectroscopy Spatially-resolved surveys of galaxies in both the optical and mm-wave bands are crucial to connect local physics to observed global trends and to anchor physical understanding of the processes that shape galaxies. What is sorely needed is such a survey for a galaxy sample…
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HI-MaNGA
Overview HI-MaNGA is a 21cm follow-up program for the SDSS-IV MaNGA survey, a survey of 10,010 unique galaxies with an Integral Field Unit (for resolved optical spectroscopy). The primary goal of HI-MaNGA is to observe all z<0.05 MaNGA galaxies with the Green Bank Telescope which lack HI data from other sources. HI-MaNGA provides valuable information…
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DiSCo — Dynamics in Star-forming Cores
A GBT Argus Survey Despite its undisputed importance to understanding disk formation and stellar multiplicity, the kinematics of star-forming cores at scales of 0.01 − 0.05 pc (2,000 – 10,000 AU) have not been well characterized because of a lack of the required sensitivity and high spatial and spectral resolution until now. Building on a…