Molecules with ALMA at Planet-forming Scales (MAPS). X. Studying Deuteration at High Angular Resolution toward Protoplanetary Disks

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dc.contributor.authorCataldi, Gianni
dc.contributor.authorYamato, Yoshihide
dc.contributor.authorAikawa, Yuri
dc.contributor.authorBergner, Jennifer B.
dc.contributor.authorFuruya, Kenji
dc.contributor.authorGuzman, Viviana V.
dc.contributor.authorHuang, Jane
dc.contributor.authorLoomis, Ryan A.
dc.contributor.authorQi, Chunhua
dc.contributor.authorAndrews, Sean M.
dc.contributor.authorBergin, Edwin A.
dc.contributor.authorBooth, Alice S.
dc.contributor.authorBosman, Arthur D.
dc.contributor.authorCleeves, L. Ilsedore
dc.contributor.authorCzekala, Ian
dc.contributor.authorIlee, John D.
dc.contributor.authorLaw, Charles J.
dc.contributor.authorLe Gal, Romane
dc.contributor.authorLiu, Yao
dc.contributor.authorLong, Feng
dc.contributor.authorMenard, Francois
dc.contributor.authorNomura, Hideko
dc.contributor.authorOberg, Karin, I
dc.contributor.authorSchwarz, Kamber R.
dc.contributor.authorTeague, Richard
dc.contributor.authorTsukagoshi, Takashi
dc.contributor.authorWalsh, Catherine
dc.contributor.authorWilner, David J.
dc.contributor.authorZhang, Ke
dc.date.accessioned2025-01-20T22:05:11Z
dc.date.available2025-01-20T22:05:11Z
dc.date.issued2021
dc.description.abstractDeuterium fractionation is dependent on various physical and chemical parameters. Thus, the formation location and thermal history of material in the solar system is often studied by measuring its D/H ratio. This requires knowledge about the deuteration processes operating during the planet formation era. We aim to study these processes by radially resolving the DCN/HCN (at 0.'' 3 resolution) and N2D+/N2H+ (similar to 0.'' 3-0.'' 9) column density ratios toward the five protoplanetary disks observed by the Molecules with ALMA at Planet-forming scales (MAPS) Large Program. DCN is detected in all five sources, with one newly reported detection. N2D+ is detected in four sources, two of which are newly reported detections. We derive column density profiles that allow us to study the spatial variation of the DCN/HCN and N2D+/N2H+ ratios at high resolution. DCN/HCN varies considerably for different parts of the disks, ranging from 10(-3) to 10(-1). In particular, the inner-disk regions generally show significantly lower HCN deuteration compared with the outer disk. In addition, our analysis confirms that two deuterium fractionation channels are active, which can alter the D/H ratio within the pool of organic molecules. N2D+ is found in the cold outer regions beyond similar to 50 au, with N2D+/N2H+ ranging between 10(-2) and 1 across the disk sample. This is consistent with the theoretical expectation that N2H+ deuteration proceeds via the low-temperature channel only. This paper is part of the MAPS special issue of the Astrophysical Journal Supplement.
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4365/ac143d
dc.identifier.eissn1538-4365
dc.identifier.issn0067-0049
dc.identifier.urihttps://doi.org/10.3847/1538-4365/ac143d
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/94127
dc.identifier.wosidWOS:000714237900001
dc.issue.numero1
dc.language.isoen
dc.revistaAstrophysical journal supplement series
dc.rightsacceso restringido
dc.titleMolecules with ALMA at Planet-forming Scales (MAPS). X. Studying Deuteration at High Angular Resolution toward Protoplanetary Disks
dc.typeartículo
dc.volumen257
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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