{
  "id": "2303.15769",
  "version": "v1",
  "published": "2023-03-28T07:10:54.000Z",
  "updated": "2023-03-28T07:10:54.000Z",
  "title": "Carbon-Chain Chemistry in the Interstellar Medium",
  "authors": [
    "Kotomi Taniguchi",
    "Prasanta Gorai",
    "Jonathan C. Tan"
  ],
  "comment": "This is a review article submitted to the Publications of the Astronomical Society of Japan. Comments are welcome",
  "categories": [
    "astro-ph.GA",
    "astro-ph.SR"
  ],
  "abstract": "The presence of carbon-chain molecules in the interstellar medium (ISM) has been known since the early 1970s and $>100$ such species have been identified to date, making up $>40\\%$ of the total of detected ISM molecules. They are prevalent not only in star-forming regions in our Galaxy, but also in other galaxies. These molecules provide important information on physical conditions, gas dynamics, and evolutionary stages of star-forming regions. More complex species of polycyclic aromatic hydrocarbons (PAHs) and fullerenes (C$_{60}$ and C$_{70}$) have been detected in circumstellar envelopes around carbon-rich Asymptotic Giant Branch (AGB) stars and planetary nebulae, while PAHs are also known to be a widespread component of interstellar dust in most galaxies. Recently, two line survey projects toward the starless core Taurus Molecular Cloud-1 with large single-dish telescopes have detected many new carbon-chain species, including molecules containing benzene rings. These new findings raise fresh questions about carbon-bearing species in the Universe. This article reviews various aspects of carbon-chain molecules, including observational studies, chemical simulations, quantum calculations, and laboratory experiments, and discusses open questions and how they may be answered by future facilities.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-03-28T07:10:54.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "interstellar medium",
      "carbon-chain chemistry",
      "findings raise fresh questions",
      "carbon-chain molecules",
      "carbon-rich asymptotic giant branch"
    ],
    "tags": [
      "review article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}