Journal: The Astrophysical Journal

  • Publication
    The Value of the Fine Structure Constant over Cosmological Times
    The optical spectra of objects classified as QSOs in the Sloan Digital Sky Survey Data Release 6 are analyzed with the aim of determining the value of the fine...
  • Publication
    The Variable Radio-to-X-Ray Spectrum of the Magnetar XTE J1810-197
    We have observed the 5.54 s anomalous X-ray pulsar XTE J1810-197 at radio, millimeter, and infrared (IR) wavelengths, with the aim of learning about its...
  • Publication
    The Variation of Integrated Star Initial Mass Functions among Galaxies
    The integrated galaxial initial mass function (IGIMF) is the relevant distribution function containing the information on the distribution of stellar remnants...
  • Publication
    The 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...
  • Publication
    The 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...
  • Publication
    The 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
  • Publication
    The 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...
  • Publication
    The 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)...
  • Publication
    The 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...