Wallace Leslie William Sargent

Wallace Leslie William Sargent


Date of Birth
February 15, 1935
Date of Death
October 29, 2012

"Wal" Sargent was the first person from his high school to attend a university. He studied fluid mechanics at the University of Manchester, but with an eye toward applying it to theoretical problems in astrophysics. He spent nearly all of his career at the California Institute of Technology, where he became a spectroscopist, observing peculiar stars, stars in the galactic halo, and peculiar galaxies and quasars. He was particularly renowned for investigations of quasar absorption lines, which he observed with the Keck, Magellan, Chandra, and Hubble Space Telescopes. He and his colleagues contributed greatly to our knowledge of the intergalactic medium. As director of the Palomar Observatory from 1997-2000, he supervised use of the Hale Telescope to conduct the Norris Survey of large-scale structure in the distribution of galaxies at moderate redshifts, and he used the Samuel Oschin Telescope to conduct the Second Palomar Observatory Sky Survey. His surveys of active galactic nuclei produced evidence that many contain massive black holes. He also worked on the isotropy of the universe by studying angular fluctuations in the cosmic microwave background radiation. Renowned as a teacher and mentor, he was the Ph.D. advisor of a number of noted astronomers, including Alex Filippenko, John Huchra, John Kormendy, Bob O'Connell, Patrick Osmer, Charles Steidel, and Ed Turner.

Other awards

American Astronomical Society, Helen B. Warner Prize, 1969; Henry Norris Russell Lectureship, 2001.
American Institute of Physics & American Astronomical Society, Dannie Heineman Prize for Astrophysics, 1991
Institut d’Astrophysique de Paris, IAP Medal, 2009.

Biographical materials

Sargent, Wallace, interview with Alan Lightman, in Lightman, Alan & Roberta Brawer, Origins: The Lives and Worlds of Modern Cosmologists (Harvard Univ. Press, Cambridge, UK, 1990), pp. 120-35.
Steidel, Charles C., Biographical Memoirs of the Royal Society (2021).


Caltech, 30 October 2012
Lynden-Bell, Donald & Max Pettini, Astronomy & Geophysics 54, 2.36 (2014).
Steidel, Charles C., PASP 125, 225-26 (2013).
The Telegraph, 2 January 2013

Academic genealogy



An earlier portrait, courtesy Caltech
AIP Center for History of Physics (several)

Named after him

Minor Planet #11758 Sargent


Papers, etc.

Sargent’s papers and a 1991 oral history interview are at Caltech Archives. The Niels Bohr Library & Archives has oral history interviews from 1975, 1989, 1991, and 2003.

Other References: Historical

Search ADS for works about Sargent

Other References: Scientific

Hazelhurst, J. & W.L.W. Sargent, “Hydrodynamics in a Radiation Field—A Covariant Treatment,” Ap.J. 130, 276-85 (1959).

Sargent, Wallace L.W., “The Circumstellar Envelope of Rho Cassiopeiae,” Ap.J. 134, 142-60 (1961).

Jugaku, A. Jun, Wallace L.W. Sargent, & Jesse L. Greenstein, “An Abundance Analysis of 3 Centauri,” Ap.J. 134, 783-96 (1961).

Sargent, Wallace L.W. & Leonard Searle, “Studies of the Peculiar A Stars. I. The Oxygen-Abundance Anomaly,” Ap.J.136, 408 (1962).

Searle, Leonard, Wallace L.W. Sargent, & Jun Jugaku, “The Luminosities and Compositions of the High-Galactic Supergiants 89 Herculis and HD 161796,” Ap.J. 137, 268-79 (1963).

Sargent, Wallace L.W. “The Atmospheres of the Magnetic and Metallic-Line Stars,” Ann. Rev. Astron. & Astrophys. 2, 297 (1964).

Searle, Leonard & Wallace L.W. Sargent, “Studies of the Peculiar A Stars. II. The Silicon-Abundance Anomaly,” Ap.J. 139, 793-811 (1964).

Sargent, Wallace L.W., “ Forbidden Emission Lines in the Spectrum of a G-type Supergiant,” Observatory 85, 33-35 (1965).

Sargent, Wallace L.W. “A Possible Relationship Between the Peculiar A Stars and the λ Boötis Stars,” Ap.J. 142, 787-90 (1965).

Searle, L., A.W. Rodgers, W.L.W. Sargent, & J.B. Oke, “Common Features of the Optical Continua associated with Violent Cosmic Events,” Nature 208, 1190-91 (1965).

Strittmatter, Peter A. & Wallace L.W. Sargent, “Stellar Rotation and the Position of the Metallic-Line Stars in the Color-Magnitude Diagram,” Ap.J. 142, 130-40 (1966).

Searle, Leonard, W.T. Lungershausen, & Wallace L.W. Sargent, “Studies of the Peculiar A Stars. IV. IV. The Relative Abundances of Four Iron-Peak Elements,” Ap.J. 145, 141-52 (1966).

Sargent, Wallace L.W. & Leonard Searle, “Spectroscopic Evidence on the Helium Abundance of Stars in the Galactic Halo,” Ap.J.145, 652-54 (1966).

Sargent, Wallace L.W. & Peter A. Strittmatter, “The Intrinsic Rotation of the Orion B Stars with Weak Helium Lines,” Ap.J.145, 938-41 (1966).

Bahcall, John N. & Wallace L.W. Sargent, “Predicted Emission Spectra of Quasi-Stellar Sources in the Far Ultraviolet,” Ap.J.148, L65-L68 (1967).

Sargent, Wallace L.W., “The Spectra of Blue Horizontal-Branch Stars in Three Northern Globular Clusters,” Ap.J.148, L147-L1150 (1967).

Bahcall, John N., Wallace L.W. Sargent, & Maarten Schmidt, “An Analysis of the Absorption Spectrum of 3C 191,” Ap.J.149, L11-15 (1967).

Sargent, Wallace L.W., “A New Intrinsically Bright Seyfert Galaxy,” PASP79, 369-71 (1967).

Oke, J.B., W.L.W. Sargent, G. Neugebauer, & E.E. Becklin, “A Variable Radio-Quiet Compact Galaxy I Zw 1727+50, Ap.J.150, L173-L176 (1967).

Jugaku, Jun, & Wallace L.W. Sargent, “Studies of the Peculiar A Stars. V. Continuous Energy Distributions,” Ap.J. 151, 259-68 (1968).

Oke, J.B. & Wallace L.W. Sargent, “The Nucleus of the Seyfert Galaxy NGC 4151, Ap.J.151, 807-23 (1968).

Sargent, Wallace L.W., “A Luminous Compact Galaxy with Strong Fe II Emission Lines,” Ap.J.152, L31-L34 (1968).

Sargent, Wallace L.W. & Leonard Searle, “A Quantitative Description of the Spectra of the Brighter Feige Stars,” Ap.J.152, 443-52 (1968).

Sargent, Wallace L.W., “The Spectra and Masses of the Blue ‘Horizontal-Branch’ Stars in M67,” Ap.J.152, 885-93 (1968).

Bahcall, John N., Jesse L. Greenstein, & Wallace L.W. Sargent, “The Absorption-Line Spectrum of the Quasi-Stellar Radio Source PKS 0237-23,” Ap.J.153, 689-98 (1968).

Sargent, Wallace L.W., “The Redshifts of Galaxies in the Remarkable Chain VV 172,” Ap.J.153, L135-L137 (1968).

Searle, Leonard & Wallace L.W. Sargent, “The Strength of Hβ in Extragalactic Objects with Broad Emission Lines,” Ap.J. 153, 1003-06 (1968).

Rees, M.J. & W.L.W. Sargent, “Composition and Origin of Cosmic Rays,” Nature 219, 1005-09 (1968).

Sargent, Anneila I., Jesse L. Greenstein, & Wallace L.W. Sargent, “A Search for Neon in the Spectra of Peculiar A and B Stars,” Ap.J. 157, 757-68 (1969).

Sargent, Wallace L.W. “The Spectra and Redshifts of Thirty Markarian Galaxies with Ultraviolet Continua,” Ap.J. 159, 765-72 (1970).

Sargent, Wallace L.W. “A Spectroscopic Survey of Compact and Peculiar Galaxies,” Ap.J. 160, 405-28 (1970).

Longair, M.S., V.H. Malumian, & W.L.W. Sargent, “The Radio Emission from Markarian Galaxies,” Astrophysical Letters 7, 23-25 (1970).

Sargent, Wallace L.W. & Leonard Searle, “Isolated Extragalactic H II Regions,” Ap.J. 162, L155-L160 (1970).

Spinrad, Hyron, et al, “Maffei 1: A New Massive Member of the Local Group?” Ap.J. 163, L25-L31 (1971).

Kowal, Charles T. & Wallace L.W. Sargent, “Supernovae Discovered since 1885,” Astronomical Journal 76, 756-64 (1971).

Sargent, Wallace L.W., “The Spectra of 80 Galaxies in Markarian’s Second List and the Space Density of the Markarian Galaxies,” Ap.J. 173, 7-24 (1972).

Searle, Leonard & Wallace L.W. Sargent, “Inferences from the Composition of Two Dwarf Blue Galaxies,” Ap.J. 173, 25-33 (1972).

Baschek, Bodo, Wallace L.W. Sargent, & Leonard Searle, “The Chemical Composition of the B-Type Subdwarf HD 4539,” Ap.J. 173, 611-18 (1972).

Shields, G.A., J.B. Oke, & W.L.W. Sargent, “The Optical Spectrum of the Seyfert Galaxy 3C 120,” Ap.J. 176, 75-89 (1972).

Richstone, Douglas & Wallace L.W. Sargent, “A New Determination of the Mass of M32,” Ap.J. 176, 91-98 (1972).

Hazard, C., D.L. Jauncey, W.L.W. Sargent, J.A. Baldwin, & E.J. Wampler, “Discrepant Redshifts of QSOs in Clusters of Galaxies and a Close QSO Pair,” Nature 246, 205-08 (1973).

Searle, Leonard, W.L.W. Sargent, & W.G. Bagnuolo, “The History of Star Formation and the Colors of Late-Type Galaxies,” Ap.J. 179, 427-38 (1973).

Spinrad, Hyron, J. Bahcall, E.E. Becklin, James E. Gunn, J. Kristian, G. Neugebauer, W.L.W. Sargent, & H. Smith, “Optical and Near-Infrared Observations of the Nearby Spiral Galaxy Maffei 2,” Ap.J. 180, 351-58 (1973).

Sargent, Wallace L.W., “Redshifts for 51 Galaxies Identified with Radio Sources in the 4C Catalog,” Ap.J. 182, L13-L15 (1973).

Huchra, John & Wallace L.W. Sargent, “The Space Density of the Markarian Galaxies Including a Region of the South Galactic Hemisphere,” Ap.J. 186, 433-43 (1973).

Turner, Edwin L. & Wallace L.W. Sargent, “The Nature of Small Groups of Galaxies in the Local Supercluster,” Ap.J. 194, 587-92 (1974).

Boksenberg, A. & Wallace L.W. Sargent, “Doublet Structure in the Absorption Redshifts in the Spectrum of PKS 0237-23,” Ap.J. 198, 31-43 (1974).

Goldreich, P. & W. Sargent, “Quasar Absorption Lines,” Comments on Astrophysics 6, 133-37 (1976).

Sargent, Wallace L.W. & Edwin L. Turner, “A Statistical Method for Determining the Cosmological Density Parameter from the Redshifts of a Complete Sample of Galaxies,” Ap.J. 212, L3-L7 (1977).

Boksenberg, A., R.F. Carswell, D.A. Allen, R.A.E. Fosbury, M.V. Penston, & W.L.W. Sargent, “The Remarkable Seyfert Galaxy Markarian 231,” MNRAS 178, 451-66 (1977).

Sargent, Wallace L.W., Paul L. Schechter, A. Boksenberg, & Keith Shortridge, “Velocity dispersions for 13 galaxies,” Ap.J. 212, 326-34 (1977).

Sargent, Wallace L.W., “Redshifts for Six 3CR Radio Galaxies and the Spectrum of 3C 111,” Ap.J. 212, L105-L106 (1977).

Melnick, Jorge & Wallace L.W. Sargent, “The radial distribution of morphological types of galaxies in X-ray clusters,” Ap.J. 215, 401-07 (1977).

Sargent, Wallace L.W., Charles T. Kowal, F.D.A. Hartwick, & Sidney van den Bergh, “Search for Globular Clusters in M31. I. The Disk and the Minor Axis,” Astronomical Journal 82, 947-53 (1977).

Greenstein, J.L., W.L.W. Sargent, T.A. Boroson, & A. Boksenberg, “Velocity Curves for Broad and Sharp Components Observed in the Emission Lines from AM Herculis,” Ap.J. 218, L121-L127 (1977).

Boksenberg, A. & Wallace L.W. Sargent, “The Existence of CA II Absorption Lines in the Spectrum of the Quasar 3C 232 due to the Galaxy NGC 3067,” Ap.J. 220, 42-46 (1978).

Cowley, A.P., F.D.A. Hartwick, & W.L.W. Sargent, “Spectra of Giant Stars in Distant Satellites of the Galaxy,” Ap.J. 220, 453-57 (1978).

Boroson, T., W.L.W. Sargent, A. Boksenberg, & R.F. Carswell, “New Observations of the Absorption Spectrum of PKS 0237-23 and Their Implications for the Origin of Quasar Absorption Lines,” Ap.J. 220, 772-82 (1978).

Hartwick, F.D.A. & W.L.W. Sargent, “Radial Velocities for Outlying Satellites and Their Implications for the Mass of the Galaxy,” Ap.J. 221, 512-20 (1978)

Sargent, W.L.W., Peter J. Young, A. Boksenberg, Keith Shortridge, C.R. Lynds, & F.D.A. Hartwick, “Dynamical Evidence for a Central Mass Concentration in the Galaxy M87,” Ap.J. 221, 731-44 (1978).

Young, Peter, W.L.W. Sargent, A. Boksenberg, C.R. Lynds, & F.D.A. Hartwick, “Dynamics of the Flattened Elliptical Galaxy NGC 4473,” Ap.J. 222, 450-55 (1978).

de Bruyn, A.G. & Wallace L.W. Sargent, “Absolute spectrophotometry of 68 Seyfert galaxy nuclei,” Astronomical Journal 83, 1257-92 (1978).

Boksenberg, A., R.F. Carswell, & W.L.W. Sargent, “Multiple components in the Z = 0.424 absorption system in the spectrum of the BL Lacertae object PKS 0735+178,” Ap.J. 227, 370-79 (1979).

Lo, K.Y. & W.L.W. Sargent, “A Search for Intergalactic Neutral Hydrogen in Three Nearby Groups of Galaxies,” Ap.J. 227, 756-66 (1979).

Young, P.J., W.L.W. Sargent, A. Boksenberg, R.F. Carswell, & J.A.J. Whelan, “A High-resolution Study of the Absorption Spectrum of PKS 2126-158,” Ap.J. 229, 891-908 (1979).

Sargent, W.L.W., Peter J. Young, A. Boksenberg, R.F. Carswell, & J.A.J. Whelan, “A High-resolution Study of the Absorption Spectra of the QSOs Q0002-422 and Q0453-423,” Ap.J. 230, 49-67 (1979).

Arp, H., W.L.W. Sargent, A.G. Willis, & C.E. Oosterbaan, “An eruptive BL Lacertae Object with a High Redshift, 0846 + 51 W1,” Ap.J. 230, 68-78 (1979).

Kent, S.M. & W.L.W. Sargent, “Ionization and excitation mechanisms in the filaments around NGC 1275,” Ap.J. 230, 667-80 (1979).

Young, Peter J., Wallace L.W. Sargent, Jerome Kristian, & James A. Westphal, “CCD Photometry of the Nuclei of Three Supergiant Elliptical Galaxies: Evidence for a Supermassive Object in the Center of the Radio Galaxy NGC 6251,” Ap.J. 234, 76-85 (1979).

Giacconi, R., et al, “A High-sensitivity X-ray Survey using the Einstein Observatory and the Discrete Source Contribution to the Extragalactic X-ray Background,” Ap.J. 234, L1-L7 (1979).

Sargent, Wallace L.W., Peter J. Young, A. Boksenberg, & David Tytler, “The Distribution of Lyman-alpha Absorption Lines in the Spectra of Six QSOs: Evidence for an Intergalactic Origin,” Ap.J. Supp.42, 41-81 (1980).

Wilkinson, A., R.G. Hine, & W.L.W. Sargent, “Optical and Radio Properties of 4C Galaxies,” MNRAS 196, 669-93 (1981).

Filippenko, Alexei V. & Wallace L.W. Sargent, “A Search for ‘Dwarf’ Seyfert 1 Nuclei. I. The Initial Data and Results ,” Ap.J. Supp.57, 503-22 (1985).

Kunth, D, & W.L.W. Sargent, “I ZW 18 and the Existence of Very Metal Poor Blue Compact Dwarf Galaxies, Ap.J. 300, 496-99 (1986).

Filippenko, Alexei V., Alain C. Porter, Wallace L. W. Sargent, & Donald P. Schneider, “The Optical Light Curve of SN 1985f in NGC 4618,” Astronomical Journal 92, 1341-48 (1986).

Sargent, W.L.W., “QSO Absorption Lines: Introduction,” in QSO Absorption Lines: Probing the Universe: Proceedings of the QSO Absorption Line Meeting, Baltimore, 1987, May 19-21, eds. J.C. Blades, D.A. Turnshek and C.A. Norman (Cambridge Univ. Press, Cambridge, UK, 1988).

Sargent, W.L.W., “Evolution of Largescale Structure in the Universe,” (George Darwin Lecture, 1987),” Observatory 107, 235-38 (1987).

Steidel, Charles C. & Wallace L.W. Sargent, “The Effect of the Lyman-Alpha Forest on the Ultraviolet Continua of Very High Redshift Quasars,” Ap.J. 313,171-84 (1987).

da Costa, L. Nicolaci, et al, “The Southern Sky Redshift Survey,” Ap.J. 327, 544-60 (1988).

Sargent, Wallace L.W., Charles C. Steidel, & A. Boksenberg, “A Survey of Lyman-Limit Absorption in the Spectra of 59 High-Redshift QSOs,” Ap.J. Supp.69, 703-61 (1989).

Reid, I.N., et al, “The Second Palomar Sky Survey,” PASP 103, 661-74 (1991).

Rosenblatt, Edward I., Matthew A. Malkan, Wallace L.W. Sargent, & Anthony C. S. Readhead, “The Broad Emission Line and Continuum Variations of Seyfert Galaxies. II: Broad-Line Region Structure and Kinematics,” Ap.J. Supp.93, 73-124 (1994).

Bahcall, John N., et al, “The Hubble Space Telescope Quasar Absorption Line Key Project. VII. Absorption Systems at z abs ≤ 1.3,” Ap.J. 457, 19-49 (1996).

Ho, Luis C. , Alexei V. Filippenko, and Wallace L.W. Sargent, “New Insights into the Physical Nature of LINERs from a Multiwavelength Analysis of the Nucleus of M81,” Ap.J.462, 183-202 (1996).

Lu, Limin, Wallace L.W. Sargent, Thomas A. Barlow, Christopher W. Churchill, & Steen S. Vogt, “Abundances at High Redshifts: The Chemical Enrichment History of Damped Lyα Galaxies,” Ap.J. Supp. 107, 475-519 (1996).

Ho, Luis C. , Alexei V. Filippenko, & Wallace L.W. Sargent, “A Search for ‘Dwarf’ Seyfert Nuclei. V. Demographics of Nuclear Activity in Nearby Galaxies,” Ap.J. 487, 568-78 (1997).

Ho, Luis C., Alexei V. Filippenko, and Wallace L.W. Sargent, “The Influence of Bars on Nuclear Activity,” Ap.J.487, 591-602 (1997).

Rauch, Michael, et al, “The Opacity of the Lyα Forest and Implications for Ωb and the Ionizing Background,” Ap.J. 489, 7-20 (1997).

Rauch, Michael, Wallace W.L. Sargent, & Tom A. Barlow, “Small-Scale Structure at High Redshift. I. Glimpses of the Interstellar Medium at Redshift ∼3.5,” Ap.J. 515, 500-05(1999).

Small, Todd A., Chung-Pei Ma, Wallace L.W. Sargent, & Donald Hamilton, “Galaxy Clustering and Large-Scale Structure from z = 0.2 to z = 0.5 in Two Norris Redshift Surveys,” Ap.J. 524, 31-48 (1999).

Ho, Luis C., et al, “Detection of Nuclear X-Ray Sources in Nearby Galaxies with Chandra,” Ap.J. 549, L51-L54 (2001).

Sarzi, Marc, et al, “Supermassive Black Holes in Bulges,” Ap.J. 550, 65-74 (2001).

Sarzi, Marc, et al, “Limits on the Mass of the Central Black Hole in 16 Nearby Bulges,” Ap.J. 567, 237-46 (2002).

Li, Weidong, et al, “SN 2002cx: The Most Peculiar Known Type Ia Supernova,” PASP 115, 453 (2003).

Boksenberg, Alec, Wallace L.W. Sargent, & Michael Rauch, “Properties of QSO Metal Line Absorption Systems at High Redshifts: Nature and Evolution of the Absorbers and the Ionizing Radiation Background,” arXiv:astro-ph/0307557v1 (2003).

Schaye, Joop, Anthony Aguirre, Tae-Sun Kim, Tom Theuns, Michael Rauch, & Wallace L. W. Sargent “Metallicity of the Intergalactic Medium Using Pixel Statistics. II. The Distribution of Metals as Traced by C IV,” Ap.J. 596, 768-96 (2003).

Fosbury, R.A.E. , M. Villar-Martin, M. Lombardi, P. Rosati, D. Stern, R.N. Hook, B.P. Holden, S.A. Stanford, G.K. Squires, M. Rauch, & W.L.W. Sargent, “Massive Star Formation in a Gravitationally-lensed H II Galaxy at z=3.357,” Ap.J. 596, 797-809 (2003).

Aguirre, Anthony, Joop Schaye, Tae-Sun Kim, Tom Theuns, Michael Rauch, & Wallace L. W. Sargent, “Metallicity of the Intergalactic Medium Using Pixel Statistics. III. Silicon,” Ap.J. 602, 38-50 (2004).

Simcoe, Robert E., Wallace L.W. Sargent, & Michael Rauch, “The Distribution of Metallicity in the Intergalactic Medium at z~2.5: O VI and C IV Absorption in the Spectra of Seven QSOs,” Ap.J. 606, 92-115 (2004).

Barth, Aaron J., Luis C. Ho, & Wallace L.W. Sargent, “The Black Hole Masses and Host Galaxies of BL Lacertae Objects,” Ap.J. 583, 134-44 (2003).

Barth, Aaron J., Luis C. Ho, Robert E. Rutledge, & Wallace .L.W. Sargent“POX 52: A Dwarf Seyfert 1 Galaxy with an Intermediate-Mass Black Hole,” Ap.J. 607, 90-102 (2004).

Sarzi, Marc, Hans-Walter Rix, Joseph C. Shields, Luis C. Ho, Aaron J. Barth, Gregory Rudnick, Alexei V. Filippenko, & Wallace L.W. Sargent, “The Stellar Populations in the Central Parsecs of Galactic Bulges Central Stellar Populations,” Ap.J. 628, 169-86 (2005).

Rauch, Michael, et al, “Expansion and Collapse in the Cosmic Web,” Ap.J. 632, 58-80 (2005).

Simcoe, Robert A., Wallace L. W. Sargent, Michael Rauch, & George D. Becker, “Observations of Chemically Enriched QSO Absorbers near z ∼ 2.3 Galaxies: Galaxy-Formation Feedback Signatures in the IGM,” Ap.J. 637, 648-68 (2006).

Becker, George D., Wallace L. W. Sargent, Michael Rauch, Robert A. Simcoe, “Discovery of Excess O I Absorption towards the z = 6.42 QSO SDSS J1148+5251,” Ap.J. 640, 69-80 (2006).

Becker, George D., Michael Rauch, & Wallace L.W. Sargent, “The Evolution of Optical Depth in the Lyα Forest: Evidence Against Reionization at z ∼ 6,” Ap.J. 662, 72-93 (2007).

Viel, Matteo, George D. Becker, James S. Bolton, Martin G. Haehnelt, Michael Rauch, and Wallace L.W. Sargent, “How Cold Is Cold Dark Matter? Small-Scales Constraints from the Flux Power Spectrum of the High-Redshift Lyman-α Forest,” Phys. Rev. Let. 100 id. 041304 (2008) [ArXiv:0709.0131].

Walsh, Jonelle L, Aaron J. Barth, Luis C. Ho, Alexei V. Filippenko, Hans-Walter Rix, Joseph C. Shields, Marc Sarzi, & Wallace L.W. Sargent, “Hubble Space Telescope Spectroscopic Observations of the Narrow-Line Region in Nearby Low-Luminosity Active Galactic Nuclei,” Astronomical Journal 136, 1677-1702 (2008).

Becker, George D., Michael Rauch, & Wallace L.W. Sargent, “High-Redshift Metals. I. The Decline of C IV at z > 5.3,” Ap.J. 698, 1010 (2009).

Ho, Luis C., Jenny E. Greee, Alexei V. Filippenko, & Wallace L.W. Sargent, “A Search for ‘Dwarf’ Seyfert Nuclei. VII. A Catalog of Central Stellar Velocity Dispersions of Nearby Galaxies,” Ap.J. Supp. 183, 1-16 (2009).

Bolton, James S., George D. Becker, J. Stuart B. Wyithe, Martin G. Haehnelt, & Wallace L.W. Sargent, “A First Direct Measurement of the Intergalactic Medium Temperature Around a Quasar at z=6,” MNRAS 406, 612-25 (2010).

Becker, George D., James S. Bolton, Martin G. Haehnelt, & Wallace L.W. Sargent, “Detection of Extended He II Reionization in the Temperature Evolution of the Intergalactic Medium,” MNRAS 410, 1096-1112 (2011).

Becker, George D., Wallace L.W. Sargent, Michael Rauch, & Robert F. Carswell, “Iron and α-element Production in the First One Billion Years after the Big Bang,” Ap.J. 744, id. 91 (2012).

Rauch, Michael , George D. Becker, Martin G. Haehnelt, Jean-Rene Gauthier, & Wallace L.W. Sargent, “Extended and Filamentary Lyman Alpha Emission from the Formation of a Protogalactic Halo at z=2.63,” MNRAS 429, 429-43 (2013).

Boksenberg, A. & Wallace L.W. Sargent, “Properties of QSO Metal-line Absorption Systems at High Redshifts: Nature and Evolution of the Absorbers and New Evidence on Escape of Ionizing Radiation from Galaxies,” Ap.J. Supp. 218, id. 7 (2015).

Search ADS for works by Sargent

Other Works: Popularizations, History, etc.

Arnold, S.J., et al, “How Large is Pluto?” Sky & Telescope 59, 209 (1980).

Gustafson, John R. & Wallace Sargent, “The Keck Observatory - 36 Mirrors are Better than One,” Mercury 17, 43 (1988).

Sargent, Wallace L.W., “Fred Hoyle’s Major Work in the Context of Astronomy and Astrophysics Today,” in Douglas Gough, ed., The Scientific Legacy of Fred Hoyle (Cambridge Univ. Press, Cambridge, UK, 2005).