Joseph C. Shields

Professor of Physics and Astronomy

Recent Publications

(182) S. M. McGraw, J. C. Shields, F. W. Hamann, D. M. Capellupo, & H. Herbst, ``Quasar Outflow Energetics from Broad Absorption Line Variability,'' Monthly Notices of the Royal Astronomical Society, in press, 2018.

(181) E. A. Moravec, F. Hamann, D. M. Capellupo, S. M. McGraw, J. C. Shields, & P. Rodríguez Hidalgo, ``HST and Ground-Based Spectroscopy of Quasar Outflows: from Mini-BALs to BALs,'' Monthly Notices of the Royal Astronomical Society, 468, 4539--4555, 2017.

(180) J. M. Silverman et al. (14 authors), ``After the Fall: Late-Time Spectroscopy of Type IIP Supernovae,'' Monthly Notices of the Royal Astronomical Society, 467, 369--411, 2017.

(179) A. Constantin, J. C. Shields, L. C. Ho, A. J. Barth, A. V. Filippenko, & C. A. Castillo, ``Dissecting the Power Sources of Low-Luminosity Emission-Line Galaxy Nuclei via Comparison of HST-STIS and Ground-Based Spectra,'' Astrophys. Jour., 814, 149 (28pp), 2015.

(178) S. M. McGraw, J. C. Shields, F. W. Hamann, D. M. Capellupo, S. C. Gallagher, & W. N. Brandt, ``Constraining FeLoBAL Outflows from Absorption Line Variability,'' Monthly Notices of the Royal Astronomical Society, 453, 1379--1395, 2015.

(177) B. M. Peterson et al. (46 authors), ``Reverberation Mapping of the Seyfert 1 Galaxy NGC7469,'' Astrophys. Jour., 795, 149 (8pp), 2014.

(176) S. M. McGraw, J. C. Shields, F. W. Hamann, D. M. Capellupo, S. C. Gallagher, & W. N. Brandt, ``FeLoBAL Outflow Variability Constraints from Multi-Year Observations,'' in IAU Symposium 304: Multiwavelength AGN Surveys and Studies, 417--418, 2014.

(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, 435, 133--148, 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.



Updated: 2018 Jan 05