Methanol at the edge of the galaxy: new observations to constrain the galactic habitable zone
Bernal, Jacob
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https://hdl.handle.net/2142/107507
Description
Title
Methanol at the edge of the galaxy: new observations to constrain the galactic habitable zone
Author(s)
Bernal, Jacob
Contributor(s)
Sephus, Cathryn
Ziurys, Lucy M.
Issue Date
2020-06-23
Keyword(s)
Astronomy
Abstract
Searches have been conducted for the J=2-1 transitions of methanol at 3mm in a sample of molecular clouds located 13-23.5 kpc from the Galactic Center, using the ARO 12m telescope. The sources are in the Cygnus arms, and typically are cold with T$_{K}$ approximately 20 K. Multiple transitions of this organic molecule were detected in 19 clouds, including ones at distances of approximately 23.5 kpc. Typical abundances found for methanol are 1x10$^{9}$. The results suggest that the Galactic Habitable Zone (GHZ) may exist much further from the Galactic Center than previously thought.
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