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Quantitative Spectroscopy of Supergiants in the Local Group Dwarf Galaxy IC 1613: Metallicity and Distance
Travis A. Berger, Rolf-Peter Kudritzki, Miguel A. Urbaneja +4
We present the spectral analysis of 21 blue supergiant stars of spectral type late B to early A within the Local Group dwarf galaxy IC 1613 based on VLT-FORS2 low resolution spectr…
Revised Radii of Kepler Stars and Planets Using Gaia Data Release 2
Travis A. Berger, Daniel Huber, Eric Gaidos +1
One bottleneck for the exploitation of data from the mission for stellar astrophysics and exoplanet research has been the lack of precise radii and evolutionary states for…
Identifying Young Planet Host Stars from Keck-HIRES Spectra of Lithium
Travis A. Berger, Andrew W. Howard, Ann Merchant Boesgaard
The lithium doublet at 6708 Å provides an age diagnostic for main sequence FGK dwarfs. We measured the abundance of lithium in 1305 stars with detected transiting planets from the…