Recent Preprints and Reprints

 

  • Kwok, S. Science Education in the 21st Century, Nature Astronomy, 2, 530-533; doi:10.1038/s41550-018-0510-4 (2018) online access
  • Kwok, S. On the Origin of Morphological Structures of Planetary Nebulae, Galaxies, 6, 66; doi:10.3390/galaxies6030066 (2018) online access
  • Kwok, S., Astrobiology as a medium of science education, Handbook of Astrobiology, Vera Kolb (ed.), CRP Press, Chapter 1.4 (2018) (pdf file)
  • Kwok, S. Formation and delivery of complex organic molecules to the Solar System and early Earth, Handbook of Astrobiology, Vera Kolb (ed.), CRP Press, Chapter 4.2 (2018) (pdf file)
  • Kwok, S. 2017, Abiotic synthesis of complex organics in the Universe, Nature Astronomy, 1, 642-643 (2017)(pdf file)
  • Zhang, Y., Sadjadi, S., Hsia, C.-H., and Kwok, S. Search for Hydrogenated C60 (Fulleranes) in Circumstellar Envelopes, Astrophys. J., 845, 76 (2017)(pdf file)
  • Kwok, S. Complex organics in space: from Solar System to distant galaxies, Astron. Astrophys. Rev., 24, 8 (2016) online access
  • Sadjadi, S., Zhang, Y., and Kwok, S. On the Origin of the 11.3 Micron Unidentified Infrared Emission Feature, Astrophys. J., 807, 95 (2015)(pdf file)
  • Sadjadi, S., Zhang, Y., and Kwok, S. A Theoretical Study on the Vibrational Spectra of Polycyclic Aromatic Hydrocarbon Molecules with Aliphatic Sidegroups, Astrophys. J., 801, 34 (2015)(pdf file)
  • Kwok, S. Search for water and life's building blocks in the Universe: An Introduction, Astronomy in Focus, 29B, 376-379 (2015)(pdf file)
  • Kwok, S. Organic Dust in the Interstellar Medium, Publication of Korean Astronomical Society, 30, 155-158 (2015)(pdf file)
  • Kwok, S. Organic Compounds in Circumstellar and Interstellar Environments, Orig. Life Evol. Biosph., 45, 113-121 (2015)(pdf file)
  • Zhang, Y., and Kwok, S. On the Viability of the PAH Model as an Explanation of the Unidentified Infrared Emission Features, Astrophys. J., 798, 37 (2015)(pdf file)
  • Hsia, C.-H., Chau, W., Zhang, Y., and Kwok, S. Hubble Space Telescope Observations and Geometric Models of Compact Multipolar Planetary Nebulae, Astrophys. J., 787, 25 (2014) (pdf file)
  • Kwok, S. Organic Dust, Synthesis by Stars, in Encyclopedia of Astrobiology., p. 1787-1789 (2014) (pdf file)
  • Kwok, S. Organic Dust, Influence on the Origin of Life, in Encyclopedia of Astrobiology., p. 1785-1787 (2014) (pdf file)
  • Kwok, S. Unidentified Infrared Emission Bands, in Encyclopedia of Astrobiology., p. 2566-2569 (2014) (pdf file)
  • Kwok, S. Red Rectangle, in Encyclopedia of Astrobiology., p. 2158-2159 (2014) (pdf file)
  • Kwok, S. Protoplanetary Nebulae, in Encyclopedia of Astrobiology., p. 2073-2075(2014) (pdf file)
  • Kwok, S. Star Dust, in Encyclopedia of Astrobiology., p. 2342-2344(2014) (pdf file)
  • Kwok, S. Organic Nanoparticles as a Component of the Interstellar Medium, in IAU Symposium 297: The Diffuse Interstellar Bands, p.213-215 (2014) (pdf file)
  • Kwok, S., and Zhang, Y. Unidentified Infrared Emission bands: PAHs or MAONs?, Astrophys. J., 771, 5 (2013)(pdf file)
  • Zhang, Y., and Kwok, S. On the Detections of C60 and Derivatives in Circumstellar Environments, Earth, Planets and Space, 65, 1069 (2013) (pdf file)
  • Zhang, Y., Kwok, S., Nakashima, J.-i., Chau, W., and Dinh-V.-Trung. A Molecular Line Survey of the Carbon-rich Protoplanetary Nebula AFGL 2688 in the 3 mm and 1.3 mm Windows, Astrophys. J., 773, 71 (2013) (pdf file)
  • Koning, N., Kwok, S., and Steffen, W. Post Asymptotic Giant Branch Bipolar Reflection Nebulae: Result of Dynamical Ejection or Selective Illumination?, Astrophys. J., 765, 92 (2013) (pdf file)
  • Zhang, Y., Hsia, C.-H., Kwok, S. Discovery of a Halo around the Helix Nebula NGC 7293 in the WISE All-Sky Survey, Astrophys. J., 755, 53 (2012) (pdf file)
  • Kwok, S. Amorphous Organic Solids as a Component of Interstellar Dust, Earth, Planets and Space, 63, 1021 (2011) (pdf file)
  • Koning, N., Kwok, S., and Steffen, W. Morphology of the Red Rectangle Proto-planetary Nebula, Astrophys. J., 740, 27 (2010) (pdf file)
  • Kwok, S. Historical overview of planetary nebulae, in IAU Symposium 283: Planetary Nebulae: an Eye to the Future, p. 1-8 (2011) (pdf file)
  • Chong, S.N., Kwok, S., Imai, H., Tafoya, D. Multipolar planetary nebulae: Not as geometrically diversified as thought, in IAU Symposium 283: Planetary Nebulae: an Eye to the Future, p. 184-187 (2011) (pdf file)
  • Koning, N., Kwok, S., and Steffen, W. Morphology of the Red Rectangle Proto-Planetary Nebula, in IAU Symposium 283: Planetary Nebulae: an Eye to the Future, p. 410-411 (2011) (pdf file)
  • Zhang, Y., Kwok, S., Hsia, C.-H., Nakashima, J.-i., and Koning, N. Planetary nebulae detected in the Spitzer Space Telescope GLIMPSE 3D Legacy Survey, in IAU Symposium 283: Planetary Nebulae: an Eye to the Future, p. 528-529 (2011) (pdf file)
  • Zhang, Y., Kwok, S., and Ko, C.-M. A study of the effect of ionization and illumination on morphologies of planetary nebulae, in IAU Symposium 283: Planetary Nebulae: an Eye to the Future, p. 530-531 (2011) (pdf file)
  • Kwok, S. Synthesis of Organic Matter by Stars and its Effect on the Origin of Life on Earth, in The 9th Pacific Rim Conference on Stellar Astrophysics, PRCSA2011, Lijiang, China, p. 3-8 (2011) (pdf file)
  • Zhang, Y., Kwok, S. Detection of C60 in the Protoplanetary Nebula IRAS 01005+791, Astrophys. J., 730, 126 (2011) (pdf file)
  • Kwok, S. Molecular evolution from AGB stars to planetary nebulae, in IAU Symposium 280: The Molecular Universe, p. 119-231 (2011) (pdf file)
  • Zhang, Y., Kwok, S., Hrivnak, B.J. A Spitzer/Infrared Spectrograph Spectral Study of a Sample of Galactic Carbon-Rich Proto-Planetary Nebulae, Astrophys. J., 725, 990 (2010) (pdf file)
  • Hsia, C.H., Kwok, S., Zhang, Y., Koning, N., and Volk, K. An Optical-infrared Study of the Young Multipolar Planetary Nebula NGC 6644, Astrophys. J., 725, 173 (2010) (pdf file)
  • Kwok, S. SpS1-Infrared and submillimetre-wave spectroscopy as probes of stellar evolution, in Highlights of Astronomy, Vol. 15, CUP, pp. 508 (2009) (pdf file)
  • Huang, Z.-Y., Hasegawa, T.I., Dinh, V.T., Kwok, S., Muller, S., Hirano, N., Lim, J., Muthu Mariappan, C., and Lyo, A. Detection of Multiple Bipolar Flows in Ngc 7027 with Submillimeter Array, Astrophys. J., 722, 273 (2010) (pdf file)
  • Kwok, S., Chong, S.N., Hsia, C.H., Zhang, Y., Koning, N. Discovery of a Multipolar Structure with an Equatorial Disk in NGC 6072, Astrophys. J., 708, 93 (2010) (pdf file)
  • Kwok, S. Morphological Structures of Planetary Nebulae, Publ. Astron. Soc. Australia, 27, 174 (2010) (pdf file)
  • Kwok, S. Delivery of Complex Organic Compounds from Planetary Nebulae to the Solar System, Inter. J. Astrobiology, 8, 161 (2009) (pdf file)
  • Kwok, S. Organic Matter in Space: from Star Dust to the Solar System, Astrophys. Space Sc. (invited review),319, 5 (2009) (pdf file)
  • Kwok, S. Stellar Evolution from AGB to Planetary Nebulae, IAU Symp. 252: The Art of Modelling Stars in the 21st Century, eds. L. Deng, K.L. Chan, C. Chiosi, CUP, p. 197-203 (2008) (pdf file)
  • Kwok, S. Synthesis of Organic Compounds in the Circumstellar Environment, in IAU Symp. 251: Organic Matter in Space, eds. S. Kwok & S. Sandford, CUP, p. 175-184 (2008) (pdf file)
  • Kwok, S. The Morphology and 3-D Structures of the Ionized, Molecular, and Dust Components of Planetary Nebulae, in Asymmetric Planetary Nebulae IV, eds. R.L.M. Corradi, A. Manchado, N. Soker , IAC electronic publications, pp. 11-18 (2009) (pdf file)
  • Volk, K., Kwok, S., and Hrivnak, B.J. Possible Precession Motion in the Bipolar Proto-Planetary Nebula IRAS 17441-2411, Astrophys. J., 670, 1137 (2007) (pdf file)
  • Kwok, S. A New Molecular Factory (News & Views), Nature, 447, 1063 (2007) (pdf file)
  • Kwok, S., Zhang, Y., Koning, N., Huang, H.-H., & Churchwell, E. Planetary Nebulae Detected in the Spitzer Space Telescope GLIMPSE Legacy Survey, Astrophys. J. Suppl., 174, 426 (2008) (pdf file)
  • Kwok, S. Enrichment of the Solar System by Organic Compounds Delivered from Evolved Stars, Advances in Space Research, 40, 1613-1619 (2007) (pdf file)
  • Kwok, S. Molecules and Solids in Planetary Nebulae and Proto-Planetary Nebula, Advances in Space Research, 40, 655 (2007) (pdf file)
  • Kwok, S., Hsia, C.H. Multiple Coaxial Rings in the Bipolar Nebula Hubble 12, Astrophys. J., 660, 341 (2007) (pdf file)
  • Kwok, S. Evolution from the Asymptotic Giant Branch to Planetary Nebulae, in Planetary Nebulae as Astronomical Tools, ed. R. Szczerba, G. Stasińska, & S. K. Górny, AIP Conference Proceedings, Melville, New York, Vol. 804, pp. 187-196 (2005) (pdf file)
  • Kwok, S. Synthesis of Organic Compounds in Planetary Nebulae and Proto-Planetary Nebulae, in Astrochemistry: from laboratory studies to astronomical observations, AIP Conference Proceedings, 855, 154-164 (2006) (pdf file)
  • Kwok, S. Journal Club, Nature, 439, 637 (2006) (pdf file)
  • Chang, H.-C., Chen, K., and Kwok, S. Nanodiamond as a Possible Carrier of Extended Red Emission, Astrophys. J. Letters, 639, L63 (2006) (pdf file)
  • Kwok, S. Planetary nebulae: new challenges in the 21st century, J. Korean Astr. Soc., 38, 271 (2005) (pdf file)
  • Kwok, S., and Su, K.Y.L. Discovery of Co-Axial Rings in the Quadrupolar Planetary Nebula NGC 6881, Astrophys. J., 635, L49 (2005) (pdf file)
  • Kwok, S. The Synthesis of Organic and Inorganic Compounds in Evolved Stars, Nature, 430, 985 (2004) (pdf file)


Books

Physics and Chemistry of the Interstellar Medium Cosmic Butterflies The Origin and Evolution of Planetary Nebulae Organic Matter in the Universe Stardust: The Cosmic Seeds of Life Our Place in the Universe