Nearby Young Stars and Young Moving Groups

Kastner, Joel H.; Principe, David A.

doi:10.1007/978-981-16-4544-0_83-1

Cited by 1 publication

(1 citation statement)

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“…AS 209 resides to the northeast of the main Ophiuchus region in Oph N 3a, with an estimated age ∼1 (0.4-2.5) Myr (Andrews et al 2018). TW Hya and V4046 Sgr are located in the nearby TWA (∼8 Myr) and β Pic MG (∼24 Myr), respectively (Kastner & Principe 2022).…”

Section: Data From the Literaturementioning

confidence: 99%

Molecular Gas Tracers in Young and Old Protoplanetary Disks

Anderson,

Cleeves,

Blake

et al. 2024

ApJ

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Molecular emission is used to investigate both the physical and chemical properties of protoplanetary disks. Therefore, to derive disk properties accurately, we need a thorough understanding of the behavior of the molecular probes upon which we rely. Here we investigate how the molecular line emission of N2H+, HCO+, HCN, and C18O compare to other measured quantities in a set of 20 protoplanetary disks. Overall, we find positive correlations between multiple line fluxes and the disk dust mass and radius. We also generally find strong positive correlations between the line fluxes of different molecular species. However, some disks do show noticeable differences in the relative fluxes of N2H+, HCO+, HCN, and C18O. These differences occur even within a single star-forming region. This results in a potentially large range of different disk masses and chemical compositions for systems of similar age and birth environment. While we make preliminary comparisons of molecular fluxes across different star-forming regions, more complete and uniform samples are needed in the future to search for trends with birth environment or age.

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Section: Data From the Literaturementioning

confidence: 99%