Publications Chris Churchill Assistant Professor of Astronomy All links connect to the on-line journal paper unless specified. Refereed Journal Articles This section last updated December 2007 2008 50. Lawton, B., Churchill, C. W., York, B. A., Ellison, S. L., Snow, T. P., Johnson, R. A., Ryan, S. G., & Benn, C. R. 2008, AJ, submitted Diffuse Interstellar Bands in Seven Intermediate Redshift Damped Ly-alpha Absorbers (arXiv:0801.0447) 49. Kacprzak, G. G., Churchill, C. W., Steidel, C. C., Murphy, M. T. 2008, AJ, in press Halo Gas Cross Sections And Covering Fractions of MgII Absorption Selected Galaxies (arXiv:0710.5765) 2007 48. Churchill, C. W., Kacprzak, G. G., Steidel, C. C., & Evans, J. L. 2007, ApJ, 661, 714 On the Heterogeneity of Metal--Line and Ly-alpha Absorption in Galaxy Halos at z=0.7 47. Kacprzak, G. G., Churchill, C. W., Steidel, C. C., Murphy, M. T., Sargent, W. L. W., & Rauch, M. 2007, ApJL, 662, 909 A Correlation Between Galaxy Morphology and MgII Halo Absorption Strength 46. Mshar, A. C., Charlton, J. C., Lynch, R. S. Churchill, C. W., & Kim, T.-S. 2006, ApJ, 669, 135 The Kinematic Evolution of Strong MgII Absorbers 2006 45. Kondo, S., Kobayashi, N., Minowa, Y., Tsijimoto, T. Churchill, C. W., + 13 co-authors, ApJ, 643, 667 First Detection of NaI D lines in High-Redshift Damped Lyman-alpha Systems 44. York, B. A., Ellison, S. E., Lawton, B., Churchill, C. W., Snow, T. P., Johnson, r., & Ryan, S. G. 2006, ApJ, 647, L29 Detection of the 5780 Diffuse Interstellar Band in a z=0.5 Damped Lyman-alpha System 2005 43. Ding, J., Charlton, J.C., & Churchill, C.W. 2005, ApJ, 621, 615 The Absorption Signature of Six MgII-Selected Systems Over 0.5 < z < 0.9 42. Masiero, J.R., Charlton, J.C., Ding, J., Churchill, C.W., & Kacprzak, G.G. 2005, ApJ, 623, 57 Models of Five Absorption Line Systems Along the Line of Sight Toward PG 0117+213 2004 41. Ellison, S.L, Churchill, C.W., Rix, S.A., & Pettini, M. 2004, ApJ, 615, 118 The Number Density of 0.6 < z < 1.7 Mg II Systems from CORALS: Observational Biases at Intermediate Redshift 40. Zonak, S.G., Charlton, J.C., Ding, J., & Churchill, C.W. 2004, ApJ, 606, 196 The Absorption Signatures of Dwarf Galaxies: The z=1.04 Multicloud Weak Mg II Absorber toward PG 1634+706 2003 39. Charlton, J.C., Ding, J., Zonak, S.G., Churchill, C.W., Bond, N.A., & Rigby, J.R. 2003, ApJ, 589, 111 High Resolution STIS/HST and HIRES/KECK Spectra of Three Weak Absorbers toward PG 1634+706 38. Churchill, C.W., Mellon, R.R., Charlton, J.C & Vogt, S.S, 2003, ApJ, 593, 203 The Spatial, Ionization, and Kinematic Conditions of the z=1.39 DLA in Q0957+061 A,B 37. Churchill, C.W., Vogt, S.S, & Charlton, J.C. 2003, AJ, 125, 98 The Physical Conditions of Intermediate Redshift Mg II Absorbing Clouds Ffrom Voigt Profile Analysis 36. Ding, J., Charlton, J.C., Bond, N. A., Zonak, S.G., & Churchill, C.W. 2003, ApJ, 587, 551 A Quadruple Phase Strong Mg II Absorber at z=0.9902 Toward PG 1634+706 35. Ding, J., Charlton, J.C., Churchill, C.W., & Palma, C. 2003, ApJ, 590, 746 The Multiphase Absorption System Toward PG 1206+459 2002 34. Rigby, J.R., Charlton, J.C., & Churchill, C.W. 2002, ApJ, 565, 743 The Population of Weak Mg II Absorbers. II The Properties of Single Cloud Systems 33. Steidel, C.C., Kollmeier, J.A., Shapely, A.E., Churchill, C.W., Dickinson, M., & Pettini, M. 2002, ApJ, 570, 526 The Kinematic Connection Between Absorbing Gas Toward QSOs and Galaxies at Intermediate Redshift 2001 32. Bond, N.A., Churchill, C.W., Charlton, J.C., & Vogt, S.S. 2001, ApJ, 562, 641 High Redshift Superwinds as the Source of the Strongest Mg II Absorbers: A Feasibility Analysis 31. Bond, N.A., Churchill, C.W., Charlton, J.C., Vogt S.S. 2001, ApJ, 557, 761 Evidence for Expanding Superbubbles in a Galaxy at z=0.7443 30. Bouche', N., Lowenthal, J.D., Charlton, J.C., Bershady, M.A., Churchill, C. W., & Steidel, C.C. 2001, ApJ, 550, 585 H-Alpha Imaging with HST+NICMOS of an Elusive DLA Cloud at z=0.6 29. Churchill, C.W. 2001, ApJ, 560, 92 Mg II Absorbers Number Density at z~0.05: Implications for Omega(DLA) Evolution 28. Churchill, C.W., & Vogt, S.S. 2001, AJ, 122, 679 The Kinematics of Intermediate Redshift Mg II Absorbers 27. Ganguly, R. Eracleous, M., Charlton, J.C., Brandt, W.N., & Churchill, C.W. 2001, ApJ, 549, 133 On the Origin of Intrinsic Narrow Absorption Lines in z < 1 QSOs 26. Murphy, M.T., Webb, J.K., Flambaum, V.V., Churchill, C.W., & Prochaska, J.X. 2001, MNRAS, 327, 1223 Possible Evidence for a Variable Fine Structure Constant from QSO Absorption Lines: Systematics Errors 25. Murphy, M.T., Webb, J.K., Flambaum, V.V., Dzuba, V.A., Churchill, C.W., Prochaska, J.X., Barrow, J.D., & Wolfe, A.M. 2001, MNRAS, 327, 1208 Possible Evidence for a Variable Fine Structure Constant from QSO Absorption Lines: Motivations, Analysis, and Results 24. Webb, J.K., Murphy, M.T., Flambaum, V.V., Dzuba, V.A., Barrow, J.D., Churchill, C.W., Prochaska, J.X., & Wolfe, A.M. 2001, Phys. Rev. Lett, 87, 091301 Further Evidence for Cosmological Evolution of the Fine Structure Constant 2000 23. Charlton, J. C., Churchill, C.W., & Rigby, J. R. 2000, ApJ 544, 702 QSO Absorption Line Constraints on Intragroup High-Velocity Clouds 22. Charlton, J.C., Mellon, R.R., Rigby, J.C., & Churchill, C.W. 2000, ApJ, 545, 635 Anticipating High-Resolution STIS Spectra of Four Multiphase Mg II Absorbers: A Test of Photoionization Models 21. Churchill, C.W., Mellon, R.R., Charlton, J.C., Jannuzi, B.T., Kirhakos, S., Steidel, C.C., & Schneider, D.P. 2000, ApJ, 543, 577 Low and High Ionization Absorption Properties of Mg II Absorption Selected Galaxies at Intermediate Redshifts. II. Taxonomy, Kinematics, and Galaxies 20. Churchill, C.W., Mellon, R.R., Charlton, J.C., Jannuzi, B.T., Kirhakos, S., Steidel, C.C., & Schneider, D.P. 2000, ApJS, 130, 91 Low and High Ionization Absorption Properties of Mg II Absorption Selected Galaxies at Intermediate Redshifts. I. General Properties 1999 19. Churchill, C.W., & Charlton, J.C. 1999, AJ, 118, 59 The Multiple Phases of Intermediate/Halo Gas in a Possible Group of Galaxies at z~1 18. Churchill, C.W., Mellon, R.R., Charlton, J.C., Jannuzi, B.T., Kirhakos, S., Steidel, C.C., & Schneider, D.P. 1999, ApJ, 519, L43 The C IV Absorption - Mg II Kinematics Connection in z~0.7 Galaxies 17. Churchill, C.W., Rigby, J.R., Charlton, J.C., & Vogt, S.S. 1999, ApJS, 120, 51 The Population of Weak Mg II Absorbers I. A Survey of 26 QSO HIRES/Keck Spectra 16. Churchill, C.W., Schneider, D.P. Schmidt, M., & Gunn, J.E. 1999, AJ, 117, 2573 An Unusual "Mini-BAL" Quasar at z=4.59 15. Ganguly, R., Eracleous, M., Charlton, J.C., & Churchill, C.W. 1999, AJ, 117, 2594 Intrinsic Narrow Line Absorption in Keck/HIRES Spectra of a Sample of Six Quasars 14. Webb, J.K., Flambaum, V.V., Churchill, C.W., Drinkwater, M.J., & Barrow, J.D. 1999, Phys. Rev. Lett., 82, 884 A Search for Time Variation in the Fine Structure Constant 1998 13. Charlton, J.C., & Churchill, C.W. 1998, ApJ, 499, 181 The Kinematic Composition of Mg II Absorbers 12. Churchill, C.W., & Le Brun, V. 1998, ApJ, 499, 677 High Metallicity Mg II Absorbers in the z < 1 Ly-alpha Forest of PKS 0454+039: Giant LSB Galaxies? 11. Ganguly, R., Churchill, C.W., & Charlton, J.C. 1998, ApJ, 498, L103 An Aluminum Enhanced Cloud in a C IV Absorber at z=1.94 10. Smith, G.H., & Churchill, C.W. 1998, MNRAS, 297, 388 Chromospheric Ca II H and K Emission Among Subdwarfs 1997 (Year of Ph.D.) From 1997 onward, on-line journal papers are not available; links are to NASA/ADS Abstracts. 09. Smith, G.H., Shetrone, M.D., Bell, R., Churchill, C.W., Briley, M. 1997, PASP, 109, 236 CNO Abundances of Bright Giants in the Globular Cluster M5 1996 08. Charlton, J.C., & Churchill, C.W. 1996, ApJ, 465, 461 Mg II Absorption in Galaxies: Halos or Disks 07. Churchill, C.W, Steidel C.C, & Vogt, S.S 1996, ApJ, 471, 164 On the Spatial and Kinematic Distribution of Mg II Absorbing Gas in z~0.7 Galaxies 06. Lu, L, Sargent, W.L.W., Barlow, T.A., Churchill, C.W., & Vogt, S.S. 1996, ApJS, 107, 457 Abundances at High Redshift: The Chemical Enrichment History of DLA Galaxies 05. Smith, G.H., Shetrone, M.D., Bell, R., & Churchill, C.W., Briley, M. 1996, AJ, 112, 1511 CNO Abundances of Bright Giants in the Globular Cluster M3 and M13 1995 04. Charlton, J.C., Churchill, C.W, & Linder, S.M 1995, ApJL, 452, L81 Probing Ly-alpha Absorbers with Double Lines of Sight 03. Churchill, C.W., & Allen, S.L. 1995, PASP, 107, 193 A Treatment for Background Correction on the Hamilton Echelle Spectrograph 1992 02. Penny, A.J., Smith, G.H., & Churchill, C.W. 1992, MNRAS, 257, 89 CN and CH Inhomogeneities Among Lower Giant Branch Stars in M71 01. Smith, G.H., Dupree, A.K., & Churchill, C.W. 1992, AJ, 104, 2005 Spectroscopy of the Ca II K Line of Metal-Poor Field Red Giants I. Southern Hemisphere Observations Proceedings and Articles This section last updated December 2005 (I'll get to it ...) 2005 Churchill, C.W., Kacprzak, G.G., & Stiedel, C.C. 2005, IAU, 199, 24 MgII Absorption Through Intermeidate Galaxies in "Probing Galaxies through Quasar Absorption Lines", eds. P.R. Williams, C-G Shu, & B. Menard Churchill, C.W., Steidel, C.C., & Kacprzak, G.G. 2005, ASP Conf. Proc, V331, 387 Mg II Absorbing Galaxies: Morphologies and Kinematics in "Extraplanar Gas", ed. R. Braun Kacprzak, G.G., Churchill, C.W., & Stiedel, C.C. 2005 IAU, 199, 80 Galaxy Morphology - Halo Gas Connections in "Probing Galaxies through Quasar Absorption Lines", eds. P.R. Williams, C-G Shu, & B. Menard Lawton, B., York, B., Ellison, S.L., Churchill, C.W., Johnson, R. A, & Snow, T.P 2005, IAU, 199, 430 A Search for Organic Molecules in Intermediate Redshift DLAs in "Probing Galaxies through Quasar Absorption Lines", eds. P.R. Williams, C-G Shu, & B. Menard Lawton, B., York, B., Ellison, S.L., Churchill, C.W., Johnson, R. A, & Snow, T.P 2005, IAU, 231, p228 A Search for Diffuse Interstellar Bands in Intermediate Redshift DLAs in "Astrochemistry Throughout the Universe", eds. D.C. Lis, G.A. Blake, & E. Herbst 2004 Ellison, S.L., Pettini, M. Churchill, C.W., Hook, I.M., Lopez, S. Rix, S., Shaver, P., Wall, J.V., & Ysn, L. 2004, ESO Messenger, 113, 64 The CORALS Survey - A Review and Progress Report on The Search for Dust Obscured Quasar Absorption Line Systems 2003 Churchill, C.W., & Steidel, C.C. 2003, ASSL Conf. Proc., V281, 149 MgII/CIV Kinematics vs. Stellar Kinematics in Galaxies in "The IGM/Galaxy Connection: The Distribution of Baryons at z=0", eds. J.L. Rosenberg & M.E. Putman Ellison, S.E., Churchill, C.W., Pettnin, M., & Rix, S. 2003, IAUJD, 15, 7 The Corals Survey: Dust & Metals in 0.5 < z < 0.7 Absorbers in "Elemental Abundances in Old Stars and Damped Lyman-alpha Systems" 2002 Charlton, J.C., Churchill, C.W., Ding, J., Zonak, S. Bond, N., & Rigby, J.R. 2002, ASP Conf. Proc., V254, 122 Phase Structure of Weak MgII Absorbers: Star Forming Pockets Outside of Galaxies in "Extragalactic Gas at Low Redshift", eds. J.S. Mulchaey & J. Stocke Churchill, C.W., Charlton, J.C., & Masiero, J. 2002, ASP Conf. Proc., V254, 236 Mapping Metal-Enriched High Velocity Clouds to Very Low HI Column Densities in "Extragalactic Gas at Low Redshift", eds. J.S. Mulchaey & J. Stocke 2001 Charlton, J.C., Churchill, C.W., & Rigby,, J.R. 2001, ASP Conf. Proc., V240, 487 QSO Absorption Line Constraints on Intra-group High-Velocity Clouds in "Gas and Galaxy Evolution", eds. J.E. Hibbard, M. Rupen, & J.H. van Gorkom Churchill, C.W. 2001, ASP Conf. Proc., V240, 31 Kinematics of log N(HI)~17 cm-2, Metal-Rich Gas Extended Around Intermediate Redshift Galaxies in "Gas and Galaxy Evolution", eds. J.E. Hibbard, M. Rupen, & J.H. van Gorkom Rigby, J.R., Charlton, J.C., & Churchill, C.W. 2001, ASP Conf. Proc., V240, 58 Weak Mg II Absorbers at z~1: Low N(HI) HVCs, SNR in Dwarf Galaxies, or Population III Remnants? in "Gas and Galaxy Evolution", eds. J.E. Hibbard, M. Rupen, & J.H. van Gorkom 2000 Charlton, J.C., & Churchill, C.W. 2000, (e-book), article 2366 Quasistellar Objects: Intervening Absorption Lines Mac Millan: on-line version abs/astro-ph/0006002 in Encyclopedia of Astronomy and Astrophysics, ed. P. Murdin Churchill, C.W. 2000, ASP Conf. Ser., V200, 271 On the Possibility that Mg II Absorbers can track the Merger Evolution of Galaxy Groups from High Redshift in "Clustering at High Redshift", eds. A. Mazure, O. Le Fevre, and V. Le Brun Churchill, C.W., Mellon, R.R., Charlton, J.C., & Jannuzi, B.T. 2000, HST Conf., p24 Multiphase Gas in Intermediate Redshift Galaxies in "A Decade of HST Science", eds. M. Livio, K. Noll, & M. Stiavelli Ganguly, R. Bond, N.A., Charlton, J.C., Eracleous, M.E., Brandt, W.N., & Churchill, C.W. 2000, HST Conf., p36 On the Origins of QSO-intrinsic Narrow Absorption Lines in "A Decade of HST Science", eds. M. Livio, K. Noll, & M. Stiavelli 1999 Le Brun, V., & Churchill, C.W., 1999, ASP Conf. Ser., V170, 315 Using Weak Mg II Lines to Chart Low Surface Brightness Galaxies in "The low Surface Brightness Universe", eds J.I. Davies, C. Impey, &S. Phillipp 1998 Charlton, J.C., & Churchill, C.W. 1998, Proc. of 13th IAP Coll., p223 The Distribution of Gas In and Around Galaxies in "Structure et Evolution du Milieu Inter-Galactique Revele par Raies D'Absorption dans le Spectre des Quasars", eds. P. Petitjean & S. Charlot Churchill, C.W. 1998, Proc. of 13th IAP Coll., p229 Mg II Selected Absorbers: Ionization Structures and a Survey of Weak Systems in "Structure et Evolution du Milieu Inter-Galactique Revele par Raies D'Absorption dans le Spectre des Quasars", eds. P. Petitjean & S. Charlot Churchill, C.W., & Charlton, J.C. 1998, , PASP Conf. Proc., V136, 187 Kinematics and Cloud to Cloud Abundance Ratios: A Rosetta Stone for Disk and Halo Components in Mg II Absorbers in "Galactic Halos", ed. D. Zaritsky Churchill, C.W., & Le Brun, V. 1998, Proc. of 13th IAP Coll., p378 Mg II Detection in the Lyman Alpha Forest: Metal Rich Cloud or LSB/Dwarf Galaxy? in "Structure et Evolution du Milieu Inter-Galactique Revele par Raies D'Absorption dans le Spectre des Quasars", eds. P. Petitjean & S. Charlot 1997 Charlton, J.C., & Churchill, C.W. 1997, ASP Conf. Proc., V114, 55 Mg II Absorbers: Disks, Halos, Satellites, and Pairs? in "Young Galaxies and QSO Absorption-Line Systems", ed. S.M. Viegas, R. Gruenwald, R.R. de Carvalho Churchill, C.W. 1997, ASP Conf. Proc., V114, 59 Establishing the Connections Between Galaxies and Mg II Absorbing Gas in "Young Galaxies and QSO Absorption-Line Systems", ed. S.M. Viegas, R. Gruenwald, R.R. de Carvalho Churchill, C.W. 1997, PhD, Source DAI-B 58/06, p3087 The Low Ionization Gaseous Context in Intermediate Redshift Galaxies Advisor: Steven S. Vogt Churchill, C.W. 1997, AIP Conf. Proc., V408, 313 QSO Absorption Lines: The UV Rest-Frame from 0 < z < 4 in "The Ultraviolet Universe at Low and High Redshift: Probing the Progress of Galaxy Evolution", eds. W.H. Waller, et al. 1996 Charlton, J.C., & Churchill, C.W. 1996, ASP Conf. Ser., V112, 63 QSO Absorption Line Systems as a Probe of Galaxies Like the Milky Way in "The History of the Milky Way and Its Satellite System", eds. A. Burkert, D. Hartmann, & S. Majewski Churchill, C.W., & Vogt, S.S. 1996, ASP Conf. Ser., V92, 501 The Halo from the Outside In: QSO Absorption Lines in "Formation of the Galactic Halo: Inside and Out", eds. H. Morrison & A. Sarajedini 1995 Churchill, C.W., Vogt, S.S., & Steidel, C.C. 1995, ESO Astrophysics Symposia, p153 From Metal-Line Absorption to Halo Kinematics? in "QSO Absorption Lines", ed. G. Meylan Technical Reports 1997 Harlow, J., Ramsey, L., Churchill, C.W., Ciardullo, R., Engel, L., Feldmeier, J., & Schneider, D. 1997, Penn State Internal Report, Department of Astronomy and Astrophysics, V9707 The UFOE Spectrograph Instrument Reference Manual 1995 Churchill, C.W. 1995, Lick Observatory Technical Report, 74 Introduction to Echelle Data Reduction Using the Image Reduction Analysis Facility: Emphasizing the Hamilton Echelle Spectrograph AAS Abstracts Author or Co-author on abstracts published in the Bulletin of the American Astronomical Society (1992-present) NASA/ADS Listing