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Do evolved stars in the LMC show dual dust chemistry?
E. Marini, F. Dell'Agli, D. A. García-Hernández +4
We study a group of evolved M-stars in the Large Magellanic Cloud, characterized by a peculiar spectral energy distribution. While the m feature arises from silicate particl…
Discovery of Resolved Magnetically Split Lines in SDSS/APOGEE Spectra of 157 Ap/Bp Stars
S. Drew Chojnowski, Swetlana Hubrig, Sten Hasselquist +7
We report on magnetic field measurements of 157 chemically peculiar A/B stars (Ap/Bp) based on resolved, magnetically split absorption lines present in -band spectra provided by…
Exploring circumstellar effects on the lithium and calcium abundances in massive Galactic O-rich AGB stars
V. Pérez-Mesa, O. Zamora, D. A. García-Hernández +6
We previously explored the circumstellar effects on the Rb and Zr abundances in massive Galactic O-rich AGB stars. Here we are interested in the role of the extended atmosphere in…
Identifying Sagittarius Stream Stars By Their APOGEE Chemical Abundance Signatures
Sten Hasselquist, Jeffrey L. Carlin, Jon A. Holtzman +17
The SDSS-IV Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey provides precise chemical abundances of 18 chemical elements for 176,000 red giant stars d…
Discovery of stars surrounded by iron dust in the LMC
E. Marini, F. Dell'Agli, M. Di Criscienzo +4
We consider a small sample of oxygen-rich, asymptotic giant branch stars in the Large Magellanic Cloud, observed by the Spitzer Space Telescope, exhibiting a peculiar spectral ener…
Kepler-730: A hot Jupiter system with a close-in, transiting, Earth-sized planet
Caleb I. Cañas, Songhu Wang, Suvrath Mahadevan +9
Kepler-730 is a planetary system hosting a statistically validated hot Jupiter in a 6.49-day orbit and an additional transiting candidate in a 2.85-day orbit. We use spectroscopic…