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7 papers · 2 filters
rrlfe: Software for Generating and Applying Metallicity Calibrations for RR Lyrae Variable Stars Across a Wide Range of Phases and Temperatures
Eckhart Spalding, Ronald Wilhelm, Nathan De Lee +7
RR Lyrae stars play a central role in tracing phase-space structures within the Milky Way because they are easy to identify, are relatively luminous, and are found in large numbers…
Observational constraints on the origin of the elements. VI. Origin and evolution of neutron-capture elements as probed by the Gaia-ESO survey
Jianhui Lian, Nicholas Storm, Guillaume Guiglion +5
Most heavy elements beyond the iron peak are synthesized via neutron capture processes. The nature of the astrophysical sites of neutron capture processes is still very unclear. In…
Decoding the compositions of four bright -process-enhanced stars
Pallavi Saraf, Carlos Allende Prieto, Thirupathi Sivarani +3
There has been a concerted effort in recent years to identify the astrophysical sites of the -process that can operate early in the Galaxy. The discovery of many -process-enh…
Iron-Peak Element Abundances in Warm Very Metal-Poor Stars
Christopher Sneden, Ann Merchant Boesgaard, John J. Cowan +3
We have derived new detailed abundances of Mg, Ca, and the Fe-group elements Sc through Zn (Z = 21-30) for 37 main sequence turnoff very metal-poor stars ([Fe/H] <= -2.1). We analy…
3D hydrodynamics simulations of internal gravity waves in red giant branch stars
Simon Blouin, Huaqing Mao, Falk Herwig +3
We present the first 3D hydrodynamics simulations of the excitation and propagation of internal gravity waves (IGWs) in the radiative interiors of low-mass stars on the red giant b…
Uranium Abundances and Ages of -process Enhanced Stars with Novel U II Lines
Shivani P. Shah, Rana Ezzeddine, Alexander P. Ji +7
The ages of the oldest stars shed light on the birth, chemical enrichment, and chemical evolution of the Universe. Nucleocosmochronometry provides an avenue to determining the ages…