4 papers
Multiwavelength Observations of Mrk 501 in 2008
D. Kranich, D. Paneque, A. Cesarini +16
The well-studied VHE (E >100 GeV) blazar Mrk 501 was observed between March and May 2008 as part of an extensive multiwavelength observation campaign including radio, optical, X-ra…
The Dichotomy of the Halo of the Milky Way
Daniela Carollo, Timothy C. Beers
We summarize evidence that the halo of the Milky Way comprises two different, and broadly overlapping, stellar components. The two structures exhibit different chemical composition…
Searches for the Most Metal-Poor Candidates from SDSS and SEGUE
Timothy C. Beers, Daniela Carollo
We report on efforts to identify large samples of very and extremely metal-poor stars based on medium-resolution spectroscopy and ugriz photometry obtained during the course of the…
Intracluster stars in the Virgo cluster core
J. A. L. Aguerri, O. E. Gerhard, M. Arnaboldi +3
We have investigated the properties of the diffuse light in the Virgo cluster core region, based on the detection of intracluster planetary nebulae (PNe) in four fields. We elimina…