An ALMA molecular inventory of warm Herbig Ae disks. I. Molecular rings, asymmetries, and complexity in the HD 100546 disk

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A90106%2F24%3A00617521" target="_blank" >RIV/67985815:90106/24:00617521 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.3847/1538-3881/ad2700" target="_blank" >https://doi.org/10.3847/1538-3881/ad2700</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-3881/ad2700" target="_blank" >10.3847/1538-3881/ad2700</a>

Result language

angličtina

Original language name

An ALMA molecular inventory of warm Herbig Ae disks. I. Molecular rings, asymmetries, and complexity in the HD 100546 disk

Original language description

Observations of disks with the Atacama Large Millimeter/submillimeter Array (ALMA) allow us to map the chemical makeup of nearby protoplanetary disks with unprecedented spatial resolution and sensitivity. The typical outer Class II disk observed with ALMA is one with an elevated C/O ratio and a lack of oxygen-bearing complex organic molecules, but there are now some interesting exceptions: three transition disks around Herbig Ae stars all show oxygen-rich gas traced via the unique detections of the molecules SO and CH3OH. We present the first results of an ALMA line survey at approximate to 337-357 GHz of such disks and focus this paper on the first Herbig Ae disk to exhibit this chemical signature-HD 100546. In these data, we detect 19 different molecules including NO, SO2, and CH3OCHO (methyl formate). We also make the first tentative detections of H213CO and 34SO in protoplanetary disks. Multiple molecular species are detected in rings, which are, surprisingly, all peaking just beyond the underlying millimeter continuum ring at approximate to 200 au. This result demonstrates a clear connection between the large dust distribution and the chemistry in this flat disk. We discuss the physical and/or chemical origin of these substructures in relation to ongoing planet formation in the HD 100546 disk. We also investigate how similar and/or different this molecular makeup of this disk is to other chemically well-characterized Herbig Ae disks. The line-rich data we present motivate the need for more ALMA line surveys to probe the observable chemistry in Herbig Ae systems, which offer unique insight into the composition of disks ices, including complex organic molecules.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

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Continuities

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Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astronomical Journal

ISSN

0004-6256

e-ISSN

1538-3881

Volume of the periodical

167

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

19

Pages from-to

164

UT code for WoS article

001186624900001

EID of the result in the Scopus database

2-s2.0-85188128688