Joseph C. Shields

Professor of Physics and Astronomy

Recent Publications

(175) F. Hamann, G. Chartas, S. McGraw, P. Rodriguez Hidalgo, J. Shields, D. Capellupo, J. Charlton, & M. Eracleous, ``Extreme-Velocity Quasar Outflows and the Role of X-ray Shielding,'' Monthly Notices of the Royal Astronomical Society, in press, 2013.

(174) D. M. Capellupo, F. Hamann, J. C. Shields, J. P. Halpern, & T. A. Barlow, ``Variability in Quasar Broad Absorption Line Outflows III. What Happens on the Shortest time-Scales?'' Monthly notices of the Royal Astronomical Society, 429, 1872-1886, 2013.

(173) C. J. Grier et al. (41 authors), ``The Structure of the Broad-Line Region in Active Galactic Nuclei. I. Reconstructed Velocity-Delay Maps,'' Astrophys. Jour., 764, 47 (15pp), 2013.

(172) J. M. Silverman et al. (40 authors), ``Berkeley Supernova Ia Program I: Observations, Data Reduction, and Spectroscopic Sample of 582 Low-Redshift Type Ia Supernovae,'' Monthly Notices of the Royal Astronomical Society, 425, 1789--1818, 2012.

(171) D. M. Capellupo, F. Hamann, J. C. Shields, J. Halpern, P. Rodriguez Hidalgo, & T. A. Barlow, ``Variability in Quasar Broad Absorption Line Outflows,'' in AGN Winds in Charleston, ed. G. Chartas, F. Hamann, & K. M. Leighly (San Francisco: ASP), 88-92, 2012.

(170) P. Rodriguez Hidalgo, F. Hamann, M. Eracleous, D. Capellupo, J. Charlton, & J. Shields, ``Variability of Mini-BAL and BAL Outflows in Quasars,'' in AGN Winds in Charleston, ed. G. Chartas, F. Hamann, & K. M. Leighly (San Francisco: ASP), 93-98, 2012.

(169) C. J. Grier et al. (43 authors), ``Reverberation Mapping Results for Five Seyfert 1 Galaxies,'' {em> Astrophys. Jour., 755, 60 (16pp), 2012.

(168) F. J. Lockman, N. L. Free, & J. C. Shields, ``The Neutral Hydrogen Bridge between M31 and M33," Astron. Jour., 144, 52 (7pp), 2012.

(167) J. C. Shields, T. Boeker, L. C. Ho, H.-W. Rix, R. P. van der Marel, & C. J. Walcher, ``Chandra Observations of the Nuclear Star Cluster and Ultraluminous X-ray Sources in NGC 2139,'' Astron. Jour., 144, 12 (7pp), 2012.

(166) D. M. Capellupo, F. Hamann, J. C. Shields, P. Rodriguez Hidalgo, & T. A. Barlow, ``Variability in Quasar Broad Absorption Line Outflows II. Multi-Epoch Monitoring of SiIV and CIV Variability, Monthly Notices of the Royal Astronomical Society, 422, 3249--3267, 2012.

(165) C. J. Grier et al. (40 authors), ``A Reverberation Lag for the High-Ionization Component of the Broad-Line Region in the Narrow-Line Seyfert 1 Mark 335,'' Astrophys. Jour., 744, L4 (5pp), 2012.

(164) K. B. Schmidt, H.-W. Rix, J. C. Shields, M. Knecth, D. W. Hogg, D. Maoz, & J. Bovy, ``The Color Variability of Quasars, '' Astrophys. J., 744, 147 (16pp), 2012.

(163) D. M. Capellupo, F. Hamann, J. C. Shields, P. Rodriguez Hidalgo, & T. A. Barlow, ``Variability in Quasar Broad Absorption Line Outflows - I. Trends in the Short-Term versus Long-Term Data,'' Monthly Notices of the Royal Astronomical Society, 413, 908--920, 2011.

(162) M. Boettcher et al. (13 authors), ``Optical Spectral Variability of the Very High Energy Gamma-Ray Blazar 1ES 1011+496,'' Astrophys. Jour., 725, 2344--2348, 2010.

(161) M. Sarzi, J. C. Shields, et al. (19 authors), ``The SAURON Project XVI: On the Sources of ionisation for the Gas in Elliptical and Lenticular Galaxies,'' Monthly Notices of the Royal Astronomical Society, 402, 2187--2210, 2010.

(160) K. Schlesinger, R. W. Pogge, P. Martini, J. C. Shields, & D. Fields, ``The Nuclear Outflows and Feedback in the Seyfert 2 Galaxy Markarian 573,'' Astrophys. Jour., 699, 857--870, 2009.

(159) C. R. Watson et al. (18 authors), ``The Star Formation and Nuclear Accretion Histories of Normal Galaxies in the AGES Survey,'' Astrophys. Jour., 696, 2206--2219, 2009.

(158) D. R. Andersen, C. J. Walcher, T. Boeker, L. C. Ho, R. P. van der Marel, H.-W. Rix, J. C. Shields, ``Caught in Formation: the Nuclear-Cluster-to-Be in NGC2139,'' Astrophys. Jour., 688, 990--999, 2008.

(157) J. L. Walsh, A. J. Barth, L. C. Ho, A. V. Filippenko, H.-W. Rix, J. C. Shields, M. Sarzi, & W. L. W. Sargent, ``Hubble Space Telescope Spectroscopic Observations of the Narrow-Line Region in Nearby Low-Luminosity Active Galactic Nuclei,'' Astron. Jour., 136, 1677--1702, 2008.

(156) J. C. Shields, C. J. Walcher, T. Boeker, L. C. Ho, H.-W. Rix, & R. P. van der Marel, ``An Accreting Black Hole in the Nuclear Star Cluster of the Bulgeless Galaxy NGC~1042,'' Astrophys. Jour., 682, 104--109, 2008.

(155) V. Gorjian et al. (19 authors), ``The Mid-Infrared Properties of X-ray Sources,'' Astrophys. Jour., 679, 1040--1046, 2008.

(154) C. J. Walcher, D. Andersen, & J. C. Shields, ``The Nuclei of Pure Disk Galaxies,'' in Formation and Evolution of Galaxy Disks, ed. J. G. Funes & E. M. Corsini (San Francisco: Astronomical Society of the Pacific), 93-96, 2008.

(153) J. C. Shields, C. J. Walcher, T. Boeker, L. C. Ho, H.-W. Rix, & R. P. van der Marel, ``An Accreting Black Hole in the Nucleus of the Bulgeless Galaxy NGC1042,'' in IAU Symposium 245: Formation and Evolution of Galaxy Bulges, ed. M. Bureau, E. Athanassoula, & B. Barbuy (Cambridge: Cambridge University Press), 259-260, 2008.

(152) J. D. Finke, J. C. Shields, M. Bottcher, & S. Basu, ``Redshift Limits of BL Lacertae Objects from Optical Spectroscopy,'' Astron. & Astrophys., 477, 513--516, 2008.

(151) M. Sarzi, J. C. Shields, R. W. Pogge, & P. Martini, ``The Stellar Populations of Seyfert 2 Nuclei,'' in IAU Symposium 241: Stellar Populations as Building Blocks of Galaxies, ed. A. Vazdekis & R. Peletier (Cambridge: Cambridge University Press), 489--492, 2007.

(150) R. P. van der Marel, J. Rossa, C.-J. Walcher, T. Boeker, L. C. Ho, H.-W. Rix, & J. C. Shields, ``Nuclear Star Clusters (Nuclei) in Spirals and Connection to Supermassive Black Holes,'' in IAU Symposium 241: Stellar Populations as Building Blocks of Galaxies, ed. A. Vazdekis & R. Peletier (Cambridge: Cambridge University Press), 475-479, 2007.

(149) H. Netzer & J. C. Shields, ``Conference Summary,'' in The Central Engine of Active Galactic Nuclei, ed. L. C. Ho & J.-M. Wang (San Francisco: ASP), 755--766, 2007.

(148) M. Sarzi, J. C. Shields, R. W. Pogge, & P. Martini, ``The Stellar Populations of Seyfert 2 Nuclei,'' in The Central Engine of Active Galactic Nuclei, ed. L. C. Ho & J.-M. Wang (San Francisco: ASP), 643--646, 2007.

(147) P. Rodriguez Hidalgo, F. Hamannn, D. Nestor, & J. Shields, ``High Velocity Outflows in Quasars,'' in The Central Engine of Active Galactic Nuclei, ed. L. C. Ho & J.-M. Wang (San Francisco: ASP), 287--290, 2007.

(146) J. C. Shields, ``Emission-Line versus Continuum Correlations in Active Galactic Nuclei,'' in The Central Engine of Active Galactic Nuclei, ed. L. C. Ho & J.-M. Wang (San Francisco: ASP), 355--364, 2007.

(145) Y. Pidopryhora, F. J. Lockman, & J. C. Shields, ``The Ophiuchus Superbubble: A Gigantic Eruption from the Inner Disk of the Milky Way,'' Astrophys. Jour., 656, 928--942, 2007.

(144) H. Ghosh, R. W. Pogge, P. Martini, S. Mathur, & J. C. Shields, ``Chandra Observations of Candidate `True' Seyfert 2 Nuclei,'' Astrophys. Jour., 656, 105--115, 2007.

(143) J. Rossa, R. P. van der Marel, T. Boeker, J. Gerssen, L. C. Ho, H.-W. Rix, J. C. Shields, & C.-J. Walcher, ``HST/STIS Results on Nuclear Star Clusters in Spiral Galaxies,'' in Island Universes -- Structure and Evolution of Disk Galaxies, ed. R. S. de Jong (Dordrecht: Springer), 449--452, 2007.

(142) J. C. Shields, H.-W. Rix, A. J. Barth, A. V. Filippenko, L. C. Ho, D. H. McIntosh, G. Rudnick, W. L. W. Sargent, & M. Sarzi, ``The Survey of Nearby Nuclei with STIS (SUNNS): Emission Line Nuclei at Hubble Space Telescope Resolution,'' Astrophys. Jour., 654, 125--137, 2007.

(141) C. J. Walcher, T. Boeker, S. Charlot, L. C. Ho, H.-W. Rix, J. Rossa, J. C. Shields, & R. van der Marel, ``Stellar Populations in the Nuclei of Late-Type Spiral Galaxies,'' Astrophys. Jour., 649, 692--708, 2006.

(140) J. Rossa, R. P. van der Marel, T. Boeker, J. Gerssen, L. C. Ho, H.-W. Rix, J. C. Shields, & C.-J. Walcher, ``HST/STIS Spectra of Nuclear Star Clusters in Spiral Galaxies: Dependence of Age and Mass on Hubble Type,'' Astron. Jour., 132, 1074--1099, 2006.

(139) H. M. L. G. Flohic, M. Eracleous, J. C. Shields, & E. C. Moran, ``The Central Engines of LINERs as Viewed by Chandra,'' Astrophys. Jour., 647, 140--160, 2006.

(138) H. Flohic, M. Eracleous, G. Chartas, J. Shields, & E. Moran, ``The Central Regions of Galaxies Hosting LINERs as Viewed by Chandra,'' in IAU Symposium 230: Populations of High-Energy Sources in Galaxies, ed. E. J. A. Meurs & G. Fabbiano (Cambridge: Cambridge University Press), 235--236, 2006.

(137) K. Brand {\sl et al.} (17 authors), ``The Chandra ``XBootes Survey III. Optical and Near-Infrared Counterparts,'' Astrophys. Jour., 641, 140--157, 2006.

(136) S. A. Yost et al. (31 authors), ``Optical Light Curve and Cooling Break of GRB050502a,'' Astrophys. Jour., 636, 959-966, 2006.

(135) M. S. Rice, P. Martini, J. E. Greene, R. W. Pogge, J. C. Shields, J. S. Mulchaey, & M. W. Regan, ``Spatially Resolved Kinematics of the Narrow Line Region in Active Galactic Nuclei,'' Astrophys. Jour., 636, 654-673, 2006.



Updated: 2013 Sep 08