Detection of two interstellar polycyclic aromatic hydrocarbons via spectral matched filtering

  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},
  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… 

Efficient stabilization of cyanonaphthalene by fast radiative cooling and implications for the resilience of small PAHs in interstellar clouds

After decades of searching, astronomers have recently identified specific Polycyclic Aromatic Hydrocarbons (PAHs) in space. Remarkably, the observed abundance of cyanonaphthalene (CNN, C10H7CN) in

Discovery of the Pure Polycyclic Aromatic Hydrocarbon Indene (c-C9H8) with GOTHAM Observations of TMC-1

Polycyclic aromatic hydrocarbons (PAHs) have long been invoked in the study of interstellar and protostellar sources, but the unambiguous identification of any individual PAH has proven elusive until

Near-infrared Spectroscopy of a Massive Young Stellar Object in the Direction toward the Galactic Center: XCN and Aromatic C–D Features

We report near-infrared (2.5–5 μm) long-slit (∼30″) spectroscopy of a young stellar object in the direction toward the Galactic center with the Infrared Camera on board the AKARI satellite. The

Discovery of Interstellar 2-Cyanoindene (2-C9H7CN) in GOTHAM Observations of TMC-1

We present laboratory rotational spectroscopy of five isomers of cyanoindene (2-, 4-, 5-, 6-, and 7-cyanoindene) using a cavity Fourier transform microwave spectrometer operating between 6 and 40

Interstellar Heritage and the Birth Environment of the Solar System

In this chapter, we explore the origins of cometary material and discuss the clues cometary composition provides in the context of the origin of our solar system. The review focuses on both cometary

From Benzonitrile to Dicyanobenzenes: The Effect of an Additional CN Group on the Thermochemistry and Negative Ion Photoelectron Spectra of Dicyanobenzene Radical Anions.

The negative ion photoelectron spectra of 1,2-dicyanobenzene (o-DCNB), 1,3-dicyanobenzene (m-DCNB), and 1,4-dicyanobenzene (p-DCNB) radical anions (DCNB·-), acquired through the computation of

The reactivity of pyridine in cold interstellar environments: The reaction of pyridine with the CN radical

The recent detection of cyclic species in cold interstellar environments is an exciting discovery with yet many unknowns to be solved. Among them, the presence of aromatic heterocycles in space would

Optical Spectrum of the Diamantane Radical Cation

Similarities exist between the infrared spectra of diamondoids and unidentified infrared emission bands seen in the spectra of young stars with circumstellar disks. Due to their low ionization energy



An index of the literature for bimolecular gas phase cation-molecule reaction kinetics

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

Probability and Information Theory with Applications to Radar

Digital Processing of Synthetic Aperture Radar Data: Algorithms and Implementation

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