Probing planet nurseries with rare isotopologues of CO

Probing Planet Formation Among Nearby Young Stars

At a distance of ∼ 55 pc, the TW Hydrae Association (Kastner et al. 1997) is almost three times closer than the Taurus molecular clouds, and its estimated age of ∼10 Myr fills a significant gap in the age sequence between previously known 1-Myr-old T Tauri stars and 50-Myr-old nearby open clusters. The group consists mostly of low-mass stars, typically a few tenths as massive as our sun, and in...

Probing the fabric of the rare biosphere

Measurement of rare isotopologues of nitrous oxide by high - resolution multi - collector 1

7 RATIONALE: Bulk and position-specific stable isotope characterization of nitrous oxide 8 represents one of the most powerful tools for identifying its environmental sources and sinks.

PROBING THE ACTIVE SITE OF RHODANESE WITH DISULFIDE REAGENTS

The Radial Distribution of H2 and Co in Tw Hya as Revealed by Resolved Alma Observations of Co Isotopologues

CO is widely used as a tracer of molecular gas. However, there is now mounting evidence that gas phase carbon is depleted in the disk around TW Hya. Previous efforts to quantify this depletion have been hampered by uncertainties regarding the radial thermal structure in the disk. Here we present resolved ALMA observations of CO 3-2, CO 3-2, CO 6-5, and CO 6-5 emission in TW Hya, which allow us ...