An ALMA molecular inventory of warm Herbig Ae disks. II. Abundant complex organics and volatile sulphur in the IRS 48 disk

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A90106%2F24%3A00617529" target="_blank" >RIV/67985815:90106/24:00617529 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.3847/1538-3881/ad26ff" target="_blank" >https://doi.org/10.3847/1538-3881/ad26ff</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-3881/ad26ff" target="_blank" >10.3847/1538-3881/ad26ff</a>

Result language

angličtina

Original language name

An ALMA molecular inventory of warm Herbig Ae disks. II. Abundant complex organics and volatile sulphur in the IRS 48 disk

Original language description

The Atacama Large Millimeter/submillimeter Array (ALMA) can probe the molecular content of planet-forming disks with unprecedented sensitivity. These observations allow us to build up an inventory of the volatiles available for forming planets and comets. Herbig Ae transition disks are fruitful targets due to the thermal sublimation of complex organic molecules (COMs) and likely H2O-rich ices in these disks. The IRS 48 disk shows a particularly rich chemistry that can be directly linked to its asymmetric dust trap. Here, we present ALMA observations of the IRS 48 disk where we detect 16 different molecules and make the first robust detections of H213CO , 34SO, 33SO, and c-H2COCH2 (ethylene oxide) in a protoplanetary disk. All of the molecular emissions, aside from CO, are co-located with the dust trap, and this includes newly detected simple molecules such as HCO+, HCN , and CS. Interestingly, there are spatial offsets between different molecular families, including between the COMs and sulfur-bearing species, with the latter being more azimuthally extended and radially located further from the star. The abundances of the newly detected COMs relative to CH3OH are higher than the expected protostellar ratios, which implies some degree of chemical processing of the inherited ices during the disk lifetime. These data highlight IRS 48 as a unique astrochemical laboratory to unravel the full volatile reservoir at the epoch of planet and comet formation and the role of the disk in (re)setting chemical complexity.

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

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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

15

Pages from-to

165

UT code for WoS article

001186629900001

EID of the result in the Scopus database

2-s2.0-85188111960