Colloq Abstract -McGuire

Sep 15

11:00am Mountain

 

Brett McGuire (NRAO-CV)

 

Interstellar PAHs: A Combined Laboratory, Radio Astronomical and Modeling Study

 

Abstract

The Unidentified Infrared Bands, the low-frequency analog to the Diffuse Interstellar Bands, are now widely believed to originate from the emission of large, aromatic molecules in high-energy environments.  Despite this, no individual species has been identified as a carrier, and indeed the only five- or six-membered aromatic ring molecule reported in the ISM is a single-line detection of benzene.  Here, I will discuss a dedicated laboratory, observational (GBT), and modeling effort which has resulted in the first definitive identification and quantification of a benzene-ring containing aromatic molecule.  The results will shed light on the probably formation pathways for larger aromatic species, and have identified a successful methodology for future, comprehensive investigations.

 

 

Connect with NRAO

The National Radio Astronomy Observatory and Green Bank Observatory are facilities of the U.S. National Science Foundation operated under cooperative agreement by Associated Universities, Inc.

Founded in 1956, the NRAO provides state-of-the-art radio telescope facilities for use by the international scientific community. NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Observing time on NRAO telescopes is available on a competitive basis to qualified scientists after evaluation of research proposals on the basis of scientific merit, the capability of the instruments to do the work, and the availability of the telescope during the requested time. NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media.

The National Science Foundation (NSF) is an independent federal agency created by Congress in 1950 "to promote the progress of science; to advance the national health, prosperity, and welfare; to secure the national defense..."

AUI collaborates with the scientific community and research sponsors to plan, build, and operate cutting-edge facilities. We cultivate excellence, deliver value, enhance education, and engage the public.