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 JPL's Science Division: People
Harold  Yorke's Picture
Jet Propulsion Laboratory
M/S 183-335
4800 Oak Grove Drive
Pasadena, CA 91109
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Harold Yorke
Senior Research Scientist

  • B.S., Physics, University of California, Los Angeles, summa cum laude (1970)
  • Diplom-Phys., (MS equivalent), Physics, Georg-August-Universität, Göttingen, Germany, sehr gut (1972)
  • Dr.rer.nat., Astrophysics, Georg-August-Universität, Göttingen, Germany, summa cum laude (1974)
  • Habilitation, Physics, Georg-August-Universität, Göttingen, Germany (1979)

Research Interests
  • Numerical radiation-hydrodynamics simulations of astrophysical plasmas, in particular as related to star formation and the influence of massive stars on their environment
  • Observations of young stars and star forming regions at millimeter, infrared, optical, ultraviolet, and X-ray wavelengths
  • Design studies for space-based and suborbital far infrared and submillimeter observatories


Herschel Icon Herschel
The Herschel Space Observatory is a space-based telescope that studies the Universe in the light of the far-infrared and submillimeter portions of the spectrum.

Professional Experience
  • Jet Propulsion Laboratory (1998-Present)
    • Senior Research Scientist (1998-Present)
    • Manager, Science Division (2006-2012)
    • Manager, Astrophysics and Space Sciences Section (2004-2006)
    • NASA Herschel Space Observatory Project Scientist (2001-2006)
    • Team Lead, Theoretical Astrophysics Team (2003-2004)
    • Element Lead, Astrophysics Element (2001-2003)
  • Universität Würzburg, Professor (C3), Astronomy and Astrophysics (1988-1998)
  • Universitäts-Sternwarte, Universität Göttingen (1973-1975 and 1978-1988)
    • Professor (tenured, apl. Prof.) (1983-1988)
    • Research Scientist (tenured, Akad. Oberrat) (1978-1983)
    • Universitäts-Sternwarte, Universität Göttingen, Research Associate (1973-1975)
  • MPI für Astrophysik, Munich, Germany, Research Scientist (non-tenured) (1975-1978)
  • California Institute of Technology, Research Assistant (1970-1971)

Selected Awards
  • NASA Group Achievement Award, Prime Contract Negotiations Team (2013)
  • NASA Exceptional Achievement Medal (2009)
  • NASA Group Achievement Award (2009)
  • NASA Achievement Award (2003)
  • Fulbright Fellowship (1972-1973)
  • Fulbright Scholarship (1971-1972)
  • National Science Foundation Fellow (1970-1971)

Selected Publications
  1. Sakurai Y, Hosokawa T, Yoshida N, Yorke HW, 2015, Formation of primordial supermassive stars by burst accretion, MNRAS, 452, 755, arXiv:1505.03954.
  2. Kuiper R, Yorke HW, Turner NJ, 2015, Protostellar Outflows and Radiative Feedback from Massive Stars, ApJ, 800, 86; 2014arXiv:1412.6528K.
  3. Hirano S, Hosokawa T, Yoshida N, Omukai K, Yorke HW, 2015, Primordial Star Formation under the Influence of Far Ultraviolet Radiation: 1540 Cosmological Halos and the Stellar Mass Distribution, MNRAS, 448, 568; 2015arXiv:1501.01630H.
  4. Tassis K, Willacy K, Yorke HW, Turner NJ, 2014, Effect of OH depletion on measurements of the mass-to-flux ratio in molecular cloud cores, MNRAS, 445, L56; 2014arXiv1408.5895T.
  5. Hirano S, Hosokawa T, Yoshida N, Umeda H, Omukai K, Chiaki G, Yorke HW, 2014, One Hundred First Stars: Protostellar Evolution and the Final Masses, ApJ, 781, 60.
  6. Hosokawa T, Yorke HW, Inayoshi K, Omukai K, Yoshida N., 2013, Formation of Primordial Supermassive Stars by Rapid Mass Accretion, ApJ, 778, 178.
  7. Kuiper R, Yorke HW, 2013, On the Effects of optically thick Gas (Disks) around massive Stars, ApJ 763, 104.
  8. Hosokawa T, Yoshida N, Omukai K, Yorke HW, 2012, Protostellar Feedback and Final Mass of the Second-Generation Primordial Stars, ApJ, 760, L37.
  9. Hosokawa T, Omukai K, Yorke HW, 2012, Rapidly Accreting Supergiant Protostars: Embryos of Supermassive Black Holes? ApJ, 756, 93.
  10. Tassis K, Willacy K, Yorke HW, Turner N, 2012, Non-Equilibrium Chemistry of Dynamically Evolving Prestellar Cores: II. Ionization and Magnetic Field, ApJ, 754, 6.
  11. Hosokawa T, Omukai K, Yoshida N, Yorke HW, 2011, Protostellar Feedback Halts the Growth of the First Stars in the Universe, Science 334, 1250.
  12. Mikellides IG, Tassis K, Yorke HW, 2011, 2-D Magnetohydrodynamic Simulations of Induced Plasma Dynamics in the Near-Core Region of a Galaxy Cluster, MNRAS, 410, 2602.
  13. Wang S, et al., 2011, Herschel observations of EXtra-Ordinary Sources (HEXOS): Methanol as a probe of physical conditions in Orion KL, A&A, 527, 96.
  14. Hosokawa T, Yorke HW, Omukai K, 2010, Evolution of Massive Protostars via Disk Accretion, ApJ, 721, 478.
  15. Ceccarelli C, et al., 2010, Herschel spectral surveys of star-forming regions. Overview of the 555-636 GHz range, A&A, 521L, 22.
  16. Gupta H, et al., 2010, Detection of OH+ and H2O+ towards Orion~KL, A&A, 521L, 47.
  17. Joblin C, et al., 2010, Gas morphology and energetics at the surface of PDRs: new insights with Herschel observations of NGC 7023, A&A, 521L, 25.
  18. Melnick GJ, et al., 2010, Herschel observations of EXtra-Ordinary Sources (HEXOS): Observations of H2O and its isotopologues towards Orion KL, A&A, 521L, 27.
  19. Pineda JL, Velusamy T, Langer WD, Goldsmith PF, Li D, Yorke HW, 2010, A Sample of [CII] Clouds Tracing Dense Clouds in Weak FUV Fields observed by Herschel, A&A, 521L, 19.
  20. Vastel C, et al., 2010, Ortho-to-para ratio of interstellar heavy water, A&A, 521L, 31.
  21. Velusamy T, Langer WD, Pineda JL, Goldsmith PF, Li D, Yorke HW, 2010, [CII] observations of H2 molecular layers in transition clouds, A&A, 521L, 18.
  22. Langer WD, Velusamy T, Pineda JL, Goldsmith PF, Li D, Yorke HW, 2010, C+ detection of warm dark gas in diffuse clouds, A&A, 521L, 17.
  23. Weiß A, et al., 2010, HIFI spectroscopy of low-level water transitions in M82, A&A, 521L, 1.
  24. Molinari S, et al, 2010, Clouds, filaments, and protostars: The Herschel Hi-GAL Milky Way, A&A, 518L, 100.
  25. Ossenkopf V, et al., 2010, HIFI observations of warm gas in DR21: Shock versus radiative heating, A&A, 518L, 79.
  26. Zinnecker H, Yorke HW, 2007, On the Formation of Massive Stars, ARAA, 45, 481.
  27. Turner NJ, Quataert E, Yorke HW, 2007, Photon Bubbles in the Circumstellar Envelopes of Young Massive Stars, ApJ, 662, 1052.
  28. Bodenheimer P, Laughlin G, Rózycka M, Yorke HW, 2007, Numerical Methods in Astrophysics - An Introduction, New York: Taylor & Francis, 329 pages, index, CD-ROM.
  29. Turner N, Willacy K, Bryden G, Yorke HW, 2006, Turbulent Mixing in the Outer Solar Nebula, ApJ, 639, 1218.
  30. Freyer T, Hensler G, Yorke HW, 2006, Massive stars and the energy balance of the ISM. II. The 35 M¤ Star and a Solution to the "Missing Wind Problem'', ApJ, 638, 262.
  31. Burkert A, Lin DNC, Bodenheimer PH, Jones CA, Yorke HW, 2005, On the Surface Heating of Synchronously Spinning Short-Period Jovian Planets, ApJ, 618, 512.
  32. Lester DF, Yorke HW, Mather JC, 2004, Does the lunar surface still offer value as a site for astronomical observatories? Space Policy 20, 99.
  33. Yorke HW, Sonnhalter C, 2002, On the Formation of Massive Stars, ApJ, 569, 846.

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