Spectra of Nearby Galaxies Measured with a New Very Broadband Receiver
Gopal Narayanan (1), Ronald L. Snell (1), Neal R. Erickson (1), Aeree, Chung (1), Mark H. Heyer (1), Min Yun (1), and William M. Irvine (1, 2), ((1) Astronomy Department, University of Massachusetts, Amherst, (2) The, Goddard Center for Astrobiology)
TL;DR
This paper presents new broadband 3mm spectra of nearby galaxies obtained with a novel receiver, revealing differences in galaxy chemistry and demonstrating the instrument's capabilities for redshift determination.
Contribution
Introduction of the Redshift Search Receiver with 36 GHz bandwidth for broadband galaxy spectroscopy and initial testing on nearby galaxies.
Findings
Detected diverse chemical signatures in galaxy spectra
Demonstrated the receiver's effectiveness for redshift measurements
Showed potential for studying galaxy evolution
Abstract
Three-millimeter-wavelength spectra of a number of nearby galaxies have been obtained at the Five College Radio Astronomy Observatory (FCRAO) using a new, very broadband receiver. This instrument, which we call the Redshift Search Receiver, has an instantaneous bandwidth of 36 GHz and operates from 74 to 110.5 GHz. The receiver has been built at UMass/FCRAO to be part of the initial instrumentation for the Large Millimeter Telescope (LMT) and is intended primarily for determination of the redshift of distant, dust-obscured galaxies. It is being tested on the FCRAO 14m by measuring the 3mm spectra of a number of nearby galaxies. There are interesting differences in the chemistry of these galaxies.
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