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  1. No Access

    Article

    A kiloparsec-scale internal shock collision in the jet of a nearby radio galaxy

    Observations of a collision between two knots in the jet of nearby radio galaxy 3C 264 support the internal shock model of how the jet plasma is energized.

    Eileen T. Meyer, Markos Georganopoulos, William B. Sparks, Eric Perlman… in Nature (2015)

  2. No Access

    Article

    Deep Hubble space telescope ultraviolet imaging of the M87 jet

    Near-ultraviolet imaging with HST offers the best possible spatial resolution currently available for optical/UV astronomical imaging. The giant elliptical galaxy M87 hosts one of the most spectacular, best s...

    Juan P. Madrid, William B. Sparks, D. E. Harris… in Astrophysics and Space Science (2007)

  3. No Access

    Article

    A large population of ‘Lyman-break’ galaxies in a protocluster at redshift z ≈ 4.1

    The most massive galaxies and the richest clusters are believed to have emerged from regions with the largest enhancements of mass density1,2,3,4 relative to the surrounding space. Distant radio galaxies may pinp...

    George K. Miley, Roderik A. Overzier, Zlatan I. Tsvetanov, Rychard J. Bouwens… in Nature (2004)

  4. No Access

    Article

    An energetic stellar outburst accompanied by circumstellar light echoes

    Some classes of stars, including novae and supernovae, undergo explosive outbursts that eject stellar material into space. In 2002, the previously unknown variable star V838 Monocerotis brightened suddenly by ...

    Howard E. Bond, Arne Henden, Zoltan G. Levay, Nino Panagia, William B. Sparks… in Nature (2003)

  5. No Access

    Chapter and Conference Paper

    Extended emission-line gas in M 87

    The extended optical (“warm”) emission filaments in M 87 may connect the inner nucleus to the outer coronal halo of the Virgo cluster of galaxies. The historical development of observations of the filament sys...

    William B. Sparks in The Radio Galaxy Messier 87 (1999)

  6. No Access

    Article

    A counterjet in the elliptical galaxy M87

    JETS in radio galaxies have a variety of observed morphologies, in particular appearing in both one-sided and two-sided forms. It is not known whether jets can be intrinsically one-sided, or if the one-sided a...

    William B. Sparks, D. Fraix-Burnet, F. Macchetto, F. N. Owen in Nature (1992)