Low-mass M-stars are the most common hosts of planetary systems in the Galaxy. Protoplanetary disks around M-stars thus offer a prime opportunity to study the chemistry of planet formation, as well as to constrain the chemical compositions and environments of nascent planets at the low-mass portion of the stellar spectrum. We present the first ALMA survey of chemistry in five disks around low-mass M-stars. 12CO, 13CO, C18O, C2H, and HCN are detected towards all disks, while H2CO and DCN are detected towards two and one disks, respectively. The molecular emission is centrally-peaked on our observed scales of 0.2-0".4 (up to ~50 AU), except for H2CO which appears ring-like. We compare the observed emission morphologies and molecular line ratios with those previously identified towards T Tauri disks. Both similarities and differences emerge, and we discuss how these trends may impact the outcome of planet formation across the stellar mass spectrum.

ALMA survey of chemistry in disks around low-mass M-stars

Macromolecular Chemistry: The Second Century

[Author Benefits](https://scimeetings.acs.org/?utm_source=pubs_content_marketing&utm_medium=website&utm_campaign=0320_MCF_NPI_Launch_Spring_Homepage&ref=pubs_content_marketing)

[How to use SciMeetings](https://storage.googleapis.com/dl.morressier.com/acs/SciMeetings-ACSSpring2020-HowToGuide_M3020-Final.pdf)

[Frequently Asked Questions](https://storage.googleapis.com/dl.morressier.com/acs/SciMtng_ACSNMSp2020_FAQ_M3120_Final.pdf)

ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.