papers
Publications (2)
astro-ph.CO2012
Formaldehyde Silhouettes Against the Cosmic Microwave Background: A Mass-Limited, Distance-Independent, Extinction-Free Tracer of Star Formation Across the Epoch of Galaxy Evolution
Jeremy Darling, Benjamin Zeiger
We examine the absorption of cosmic microwave background (CMB) photons by formaldehyde (H2CO) over cosmic time. The K-doublet rotational transitions of H2CO become "refrigerated" -…
astro-ph.GA2010
Formaldehyde Anti-Inversion at z=0.68 in the Gravitational Lens B0218+357
Benjamin Zeiger, Jeremy Darling
We report new observations of the 110-111 (6 cm) and 211-212 (2 cm) transitions of ortho-formaldehyde (o-H2CO) in absorption at z=0.68466 toward the gravitational lens system B0218…