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  1. No Access

    Article

    Metal-line system survey: characterizing the low-redshift IGM

    The low-redshift IGM probes the last ten billion years of metal enrichment from galactic feedback processes. We present preliminary results from a survey of intergalactic metal-line absorption systems in arch...

    Kathy L. Cooksey, Jason X. Prochaska in Astrophysics and Space Science (2009)

  2. No Access

    Chapter and Conference Paper

    Baryons: What,When and Where?

    We review the current state of empirical knowledge of the total budget of baryonic matter in the Universe as observed since the epoch of reionization. Our summary examines on three milestone redshifts since th...

    Jason X. Prochaska, Jason Tumlinson in Astrophysics in the Next Decade (2009)

  3. No Access

    Article

    An 84-μG magnetic field in a galaxy at redshift z = 0.692

    The magnetic field that pervades our Galaxy is an important constituent of the interstellar medium. Similar fields, known as B fields, seem to be present in galaxies with redshifts of z > 1, though the strength r...

    Arthur M. Wolfe, Regina A. Jorgenson, Timothy Robishaw, Carl Heiles… in Nature (2008)

  4. No Access

    Article

    The Need for Ultraviolet to Understand the Chemical Evolution of the Universe and Cosmology.

    We identify an important set of key areas where an advanced observational Ultraviolet capability would have major impact on studies of cosmology and Galaxy formation in the young Universe. Most of these are as...

    Willem Wamsteker, Jason X. Prochaska, Luciana Bianchi… in Astrophysics and Space Science (2006)

  5. No Access

    Chapter

    The Need for Ultraviolet to Understand the Chemical Evolution of the Universe, and Cosmology

    We identify an important set of key areas where an advanced observational Ultraviolet capability would have major impact on studies of cosmology and Galaxy formation in the young Universe. Most of these are as...

    Willem Wamsteker, Jason X. Prochaska… in Fundamental Questions in Astrophysics: Gui… (2006)

  6. No Access

    Chapter

    Constraining Variationsin the Fine-Structure Constant, Quark Massesand the Strong Interaction

    We present evidence for variations in the fine-structure constant from Keck/HIRES spectra of 143 quasar absorption systems over the redshift range 0.2 < zabs < 4.2. This includes 15 new systems, mostly at high-z ...

    Michael T. Murphy, Victor V. Flambaum… in Astrophysics, Clocks and Fundamental Const… (2004)

  7. No Access

    Article

    The elemental abundance pattern in a galaxy at z = 2.626

    The discovery of metal-poor stars1,2 (where metal is any element more massive than helium) has enabled astronomers to probe the chemical enrichment history of the Milky Way3,4. More recently, element abundances i...

    Jason X. Prochaska, J. Christopher Howk, Arthur M. Wolfe in Nature (2003)

  8. No Access

    Chapter and Conference Paper

    The First Detection of Cobalt in a Damped Lyman Alpha System

    We present the first ever detection of Cobalt in a Damped Lyman Alpha system (DLA) at z ~ 2. In addition to providing important clues to the star formation history of these high redshift galaxies, we discuss how ...

    Sara L. Ellison, Sean G. Ryan… in New Quests in Stellar Astrophysics: The Li… (2002)