Detection of two interstellar polycyclic aromatic hydrocarbons via spectral matched filtering
@article{McGuire2021DetectionOT, title={Detection of two interstellar polycyclic aromatic hydrocarbons via spectral matched filtering}, author={Brett A. McGuire and Ryan A. Loomis and Andrew M. Burkhardt and Kin Long Kelvin Lee and Christopher N. Shingledecker and Steven B. Charnley and Ilsa R. Cooke and Martin A. Cordiner and Eric Herbst and Sergei Kalenskii and Mark A. Siebert and Eric R. Willis and Ci Xue and Anthony J. Remijan and Michael C. McCarthy}, journal={Science}, year={2021}, volume={371}, pages={1265 - 1269} }
Identifying PAHs in space Midinfrared spectroscopy has shown that polycyclic aromatic hydrocarbons (PAHs) are abundant in many astronomical objects, but this technique cannot determine which specific PAH molecules are present. Radio astronomy could provide individual identifications if the molecule is sufficiently abundant and has a large dipole moment, but PAHs are expected to produce large numbers of very weak lines. McGuire et al. performed a stacking and matched filter analysis to search…
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References
SHOWING 1-10 OF 12 REFERENCES
An index of the literature for bimolecular gas phase cation-molecule reaction kinetics
- Physics, Chemistry
- 2003
This is an index to the literature for gas phase bimolecular positive ionmolecule reactions. Over 2300 references are cited. Reaction rate coefficients and product distributions of the reactions are…
Digital Processing of Synthetic Aperture Radar Data: Algorithms and Implementation
- Computer Science, Environmental Science
- 2005
Signal Processing Fundamentals and Comparison of Algorithms: The Range Doppler Algorithm and the SPECAN Algorithm.
Spectral Line Coverage and Parameters The specific transition parameters for each species are obtained by generating spectral line catalogs
- 2013
Replication Data for Astrochemical Models in the Detection of 1-and 2-cyanonaphthalene, Version 2.0, Harvard Dataverse
- 2021
2021) for a detailed explanation of the methods used to constrain these quantities and derive the uncertainties
- 2021
Materials and methods are available as supplementary materials
Initial elemental abundances were taken from (Hincelin et al. 2011) with the exception of atomic oxygen, where we utilize O/H ≈ 1.5 × 10−4, resulting in a slightly carbon rich C/O ≈ 1.1 (Loomis
- 2018
STACKING, AND MATCHED FILTERING ANALYSIS RESULTS Both techniques were developed in the signal processing and radar communities (Woodward
- 1953
Spectral Stacking Data for Phase 2 Science Release of GOTHAM
- 2020