207 citations · 2.7k across the 59 of their papers we have counts for
59 papers
Normal and Outlying Populations of the Milky Way Stellar Halo at [Fe/H] < -2
Judith Cohen, Norbert Christlieb, Ian Thompson +5
From detailed abundance analysis of >100 Hamburg/ESO candidate extremely metal-poor (EMP) stars we find 45 with [Fe/H] < -3.0 dex. We identify a heretofore unidentified group: Ca-d…
Limits on the spatial variations of the electron-to-proton mass ratio in the Galactic plane
S. A. Levshakov, D. Reimers, C. Henkel +4
Aims. To validate the Einstein equivalence principle (local position invariance) by limiting the fractional changes in the electron-to-proton mass ratio, mu = m_e/m_p, measured in…
The precision of line position measurements of unresolved quasar absorption lines and its influence on the search for variations of fundamental constants
Nils Prause, Dieter Reimers
Optical quasar spectra can be used to trace variations of the fine-structure constant alpha. Controversial results that have been published in last years suggest that in addition t…
Star-forming regions of the Aquila rift cloud complex. I. NH3 tracers of dense molecular cores
S. A. Levshakov, C. Henkel, D. Reimers +4
(Abridged) Aims. In the present part of our survey we search for ammonia emitters in the Aquila rift complex which trace the densest regions of molecular clouds. Methods. From a CO…
A hydrodynamic study of the circumstellar envelope of alpha Scorpii
K. Braun, R. Baade, D. Reimers +1
Context: Both the absolute mass-loss rates and the mechanisms that drive the mass loss of late-type supergiants are still not well known. Binaries such as alpha Sco provide the mos…
Searches for Metal-Poor Stars from the Hamburg/ESO Survey using the CH G-band
Vinicius M. Placco, Catherine R. Kennedy, Timothy C. Beers +6
We describe a new method to search for metal-poor candidates from the Hamburg/ESO objective-prism survey (HES) based on identifying stars with apparently strong CH G-band strengths…