The integrated galaxial initial mass function (IGIMF) is the relevant distribution function containing the information on the distribution of stellar remnants...
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PublicationThe Variation of Integrated Star Initial Mass Functions among Galaxies
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PublicationThe Vertical Metallicity Gradient of the Milky Way Disk: Transitions in [α/Fe] Populations
Using G dwarfs from the Sloan Extension for Galactic Understanding and Exploration (SEGUE) survey, we have determined the vertical metallicity gradient in the...
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PublicationThe Very Red Afterglow of GRB 000418: Further Evidence for Dust Extinction in a Gamma-Ray Burst Host Galaxy
We report near-infrared and optical follow-up observations of the afterglow of the GRB 000418 starting 2.5 days after the occurrence of the burst and extending...
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PublicationThe Virgo Stellar Overdensity: Mapping the Infall of the Sagittarius Tidal Stream onto the Milky Way Disk
The recently discovered Virgo stellar overdensity, which extends over ~1000 deg2 perpendicular to the Galactic disk plane (7 kpc
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PublicationThe VLT FLAMES Survey of Massive Stars: Rotation and Nitrogen Enrichment as the Key to Understanding Massive Star Evolution
Rotation has become an important element in evolutionary models of massive stars, specifically via the prediction of rotational mixing. Here we study a sample...
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PublicationThe Volatile Composition of Comet 17P/Holmes after its Extraordinary Outburst
The volatile abundances in comet 17P/Holmes were measured on three dates (UT 2007 October 27.6 and 31.3 and November 2.3) using high-dispersion (λ/Δλ~2.5×104)...
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PublicationThe Weakening Outburst of the Young Eruptive Star V582 Aur
V582 Aur is a pre-main-sequence FU Orionis type eruptive star, which entered a brightness minimum in 2016 March due to changes in the line-of-sight extinction...
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PublicationThe Wendelstein Calar Alto Pixellensing Project (WeCAPP): First MACHO Candidates
We report the detection of the first two microlensing candidates from the Wendelstein Calar Alto Pixellensing Project (WeCAPP). Both are detected with a high...
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PublicationThe X-Ray Properties of the Black Hole Transient MAXI J1659-152 in Quiescence
We present new Chandra X-ray observations of the transient black hole X-ray binary MAXI J1659-152 in quiescence. These observations were made more than one year...