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On Lithium-Rich Red Giants. II. Engulfment on the Giant Branch of Trumpler 20
Claudia Aguilera-Gómez, Julio Chanamé, Marc H. Pinsonneault +1
The Gaia-ESO survey recently reported on a large sample of lithium (Li) abundance determinations for evolved stars in the rich open cluster Trumpler 20. They argue for a scenario w…
Lithium Inventory of 2 Red Clump Stars in Open Clusters: A Test of the Helium Flash Mechanism
Joleen K. Carlberg, Katia Cunha, Verne V. Smith
The temperature distribution of field Li-rich red giants suggests the presence of a population of Li-rich red clump (RC) stars. One proposed explanation for this population is that…
A Comparison of Stellar Elemental Abundance Techniques and Measurements
Natalie R. Hinkel, Patrick A. Young, Michael D. Pagano +15
Stellar elemental abundances are important for understanding the fundamental properties of a star or stellar group, such as age and evolutionary history, as well as the composition…
On Lithium-Rich Red Giants. I. Engulfment of Sub-Stellar Companions
Claudia Aguilera-Gómez, Julio Chanamé, Marc Pinsonneault +1
A small fraction of red giants are known to be lithium (Li) rich, in contradiction with expectations from stellar evolutionary theory. A possible explanation for these atypical gia…
Companions to APOGEE Stars I: A Milky Way-Spanning Catalog of Stellar and Substellar Companion Candidates and their Diverse Hosts
Nicholas W. Troup, David L. Nidever, Nathan De Lee +24
In its three years of operation, the Sloan Digital Sky Survey (SDSS-III) Apache Point Observatory Galactic Evolution Experiment (APOGEE-1) observed 14,000 stars with enough epoc…
Searching for spectroscopic binaries within transition disk objects
Saul A. Kohn, Evgenya L. Shkolnik, Alycia J. Weinberger +2
Transition disks (TDs) are intermediate stage circumstellar disks characterized by an inner gap within the disk structure. To test whether these gaps may have been formed by closel…