Molecules with ALMA at Planet-forming Scales (MAPS). VI. Distribution of the Small Organics HCN, C<sub>2</sub>H, and H<sub>2</sub>CO
نویسندگان
چکیده
Small organic molecules, such as C2H, HCN, and H2CO, are tracers of the C, N, O budget in protoplanetary disks. We present high angular resolution (10-50 au) observations H2CO lines five disks from Molecules with ALMA at Planet-forming Scales (MAPS) Large Program. derive column density excitation temperature profiles for HCN find that emission arises a temperate (20-30 K) layer disk, while C2H is relatively warmer (20-60 layers. In case HD 163296, we decrease inside one dust gaps near 83 au, where planet has been proposed to be located. assuming temperatures between 20 50 K, slightly higher densities colder around T Tauri stars than Herbig Ae stars. The rise location CO snowline and/or millimeter edge, suggesting an efficient release ices outer disk. Finally, inner au these rich species, abundances relative water similar cometary values. Comets could therefore deliver key organics future planets disks, what might have happened here on Earth. This paper part MAPS special issue Astrophysical Journal Supplement.
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ژورنال
عنوان ژورنال: Astrophysical Journal Supplement Series
سال: 2021
ISSN: ['1538-4365', '0067-0049']
DOI: https://doi.org/10.3847/1538-4365/ac1440