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The spatial distribution of an aromatic molecule, C6H5CN, in the cold dark cloud TMC-1

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arxiv 2305.15315 v1 pith:FAJNPXUX submitted 2023-05-24 astro-ph.GA

J. Cernicharo , B. Tercero , N. Marcelino , M. Agundez , P. de Vicente This is my paper · ORCID
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keywords arcsecspatialtmc-1aromaticc6h5cncloudlineregion
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We present a highly sensitive 2D line survey of TMC-1 obtained with the Yebes 40m radio telescope in the Q-band (31.13-49.53 GHz). These maps cover a region of 320 arcsec x 320 arcsec centred on the position of the QUIJOTE line survey with a spatial sampling of 20 arcsec. The region covering 240 arcsec x 240 arcsec, where a longer integration time was used, shows a homogenous sensitivity of 2-4 mK across the band. We present in this work the first determination of the spatial extent of benzonitrile (C6H5CN), which follows that of cyanopolyynes rather well, but differs significantly from that of the radicals CnH and CnN. We definitively conclude that aromatic species in TMC-1 are formed from chemical reactions involving smaller species in the densest zones of the cloud.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Inventories of Rich Carbon-Chain Chemistry in Prestellar and Starless Cores in the Perseus Molecular Cloud

    astro-ph.GA 2026-08 conditional novelty 6.0 of 10

    A 15-core Yebes 40m survey in Perseus detects a diverse set of carbon-chain molecules, including HC7N in 4 cores, and finds abundance patterns tied to core density and environment.

  2. Laboratory spectroscopy, theoretical characterization, and astronomical search for syn-propenethial (CH2CHCHS)

    astro-ph.GA 2026-07 accept novelty 6.0 of 10

    syn-propenethial is undetected in TMC-1 (N < 1.5e10 cm^-2) because gas-phase formation yields ~95% anti and tunneling isomerizes the rest on ~10^3 yr timescales.

  3. Chemistry of Dark Molecular Clouds

    astro-ph.GA 2026-07 unverdicted novelty 2.0 of 10

    A comprehensive review arguing that the chemically rich cores TMC-1 CP and L1544 are representative molecular-cloud laboratories, and that complex organic molecule production is largely insensitive to metallicity.

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