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Massive Stars Born from Violent Cosmic Collapse
Astronomers using the U.S. National Science Foundation Green Bank Telescope reveal new process of star formation, challenging existing models Controlled chaos is a key part of forming massive stars. An international team of astronomers has observed evidence that massive stars can be born from rapidly collapsing clouds of gas and dust, challenging long-held assumptions about…
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BARFLYS — Bar Ammonia Radiation in Filaments, Lanes, and YSOs
The dust lane features within galaxy bars are thought to mediate the flow of material from the disk to the nucleus, fueling the extreme environment found within the inner regions of galaxies. Our team recently proposed a pilot study with the GBT, targeting the midpoint of the Milky Way’s Galactic Bar Dust Lanes. These NH3…
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KEYSTONE — KFPA Examinations of Young Stellar (O-star) Natal Environments
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GAS — Green Bank Ammonia Survey
The Green Bank Ammonia Survey (GAS) is an ambitious legacy survey to map emission from the 23 GHz NH3 inversion transitions toward all the northern Gould Belt star forming regions with Av > 7. The Gould Belt is a ring of young stars and star-forming regions that contains nearly all the ongoing, predominantly low-mass star…
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RAMPS — The Radio Ammonia Mid-Plane Survey
RAMPS Data Project Summary High-mass stars (M > 8 MSun), though rarer than low-mass stars, are nevertheless a dominant source of energy and chemical enrichment in the interstellar medium (ISM). Because massive stars are rarer and form in denser, more opaque gas, their formation is more difficult to observe and is less well understood than…
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Robust Gas Measurements for BreakBRD Galaxies
The general view of galaxy quenching is that it takes place from the inside-out, explaining the commonality of non-star forming bulges and actively star forming disks across the galaxy population. However, a fraction of apparently quenching galaxies display opposite behavior: actively star forming bulges and non star-forming disks. These galaxies are dubbed BreakBRDs (“Break Bulges…
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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),…