The TW Hya Rosetta Stone Project. II. Spatially Resolved Emission of Formaldehyde Hints at Low-temperature Gas-phase Formation

Formaldehyde (H2CO) is an important precursor to organics like methanol (CH3OH). It is important to understand the conditions that produce H2CO and prebiotic molecules during star and planet formation. H2CO possesses both gas-phase and solid-state formation pathways, involving either UV-produced rad...

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Veröffentlicht in:	The Astrophysical journal 2021-01, Vol.906 (2), p.111, Article 111
Hauptverfasser:	Terwisscha van Scheltinga, Jeroen, Hogerheijde, Michiel R., Cleeves, L. Ilsedore, Loomis, Ryan A., Walsh, Catherine, Öberg, Karin I., Bergin, Edwin A., Bergner, Jennifer B., Blake, Geoffrey A., Calahan, Jenny K., Cazzoletti, Paolo, van Dishoeck, Ewine F., Guzmán, Viviana V., Huang, Jane, Kama, Mihkel, Qi, Chunhua, Teague, Richard, Wilner, David J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astrochemistry Astronomy & Astrophysics Astrophysics Formaldehyde Interstellar abundances Interstellar molecules Laboratory experiments Low temperature Physical Sciences Planet formation Planets Precursors Protoplanetary disks Radio telescopes Science & Technology Solid state Spin temperature Sublimation
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Zusammenfassung:	Formaldehyde (H2CO) is an important precursor to organics like methanol (CH3OH). It is important to understand the conditions that produce H2CO and prebiotic molecules during star and planet formation. H2CO possesses both gas-phase and solid-state formation pathways, involving either UV-produced radical precursors or CO ice and cold ( 20 K) dust grains. To understand which pathway dominates, gaseous H2CO's ortho-to-para ratio (OPR) has been used as a probe, with a value of 3 indicating "warm" conditions and
ISSN:	0004-637X 1538-4357
DOI:	10.3847/1538-4357/abc9ba