Bouwens, Rychard
Nationality: American (USA)

Associate Professor: Leiden Observatory, Leiden University
Assistant Professor: Leiden Observatory, Leiden University
Research Specialist, University of California, Santa Cruz
Postdoctoral Fellow, University of California, Santa Cruz
PhD, Department of Physics, University of California, Berkeley
MSc, Department of Physics, University of California, Berkeley


2013 Recipient, Pastoor Schmeitsprijs voor de Sterrekunde (awarded once every three years to the Dutch astronomer [under 40] viewed as having the most outstanding contributions to astronomy over the previous three years)

2010 – NWO Vrij Competitie (~220.000 euros)
2012 – NWO Vrij Competitie (~220.000 euros)
2016 – NWO TOP Grant (~670.000 euros)

1/10/2018 Nature, “The Earliest Galaxies Spun Like the Milky Way Galaxy
3/16/2016 Astronomy Now, “Students Map Milky Way with Dwarf Stars”
3/3/2016 NASA/STScI, “Hubble Team Breaks Cosmic Distance Record”
9/3/2015 Keck/Caltech/Leiden, “Farthest Galaxy Detected”
5/5/2015 NASA/STScI, “Astronomers Set a New Distance Record” (Volkskrant article)
1/7/2014 NASA/STScI, “NASA Great Observatories Team Up to
–                     Discover Ultra-Bright Young Galaxies”
9/25/2012 NASA/STScI, “Hubble Goes to the eXtreme to Assemble
–                    Farthest Ever View of the Universe”
1/26/2011 NASA/STScI, NASA’s Hubble Finds Most Distant
–                     Galaxy Candidate Ever Seen in Universe”
 —- “Astronomers find Oldest Galaxy Ever Seen”
1/5/2010 NASA/STScI, “Hubble Reaches the Undiscovered Country
–                     of Primeval Galaxies”
2/12/2008 NASA/STScI, “Astronomers Find 1 of the Youngest in
–                      + Brightest Galaxies Early Universe”
10/25/2006 Carnegie, “Astronomers Weigh 200-million-year old Baby Galaxies
9/21/2006 NASA/STScI, “NASA’s Hubble Finds Hundreds
–               of Young Galaxies in Early Universe”
9/13/2006 NASA/STScI, “Tracing the Evolution of the
– First Galaxies in the Universe”


Bouwens R.J. (2016), High-Redshift Galaxy Surveys and the Reionization of the Universe. In: Mesinger, A. (red.) Understanding the Epoch of Cosmic Reionization. nr. 423 Switzerland: Springer. 111-143.

2015-2016 Leiden Observatory, 6-Month Evaluations
2014-2015 Leiden Observatory, Promote Begleidings Committee
2014-2016 Leiden Observatory, Chair of Computer Committee
2012-2016 Leiden Observatory, Organizer of PhD Call

2011 – 2015 “Observational Cosmology,” Leiden University (3 times)
2013 – 2015  Master Student Seminar Course, Leiden University (3 times)
2012 – 2016 “Galaxy Structure, Dynamics, and Evolution,” Leiden University (3 times)
2017 – 2017 “Origin and Evolution of the Universe,” Leiden University

IAU Membership


1. Bouwens, R.J.. 2018, Nature, Distant galaxy formed stars only 250 million years after the Big Bang
2. Bouwens, R.J.. 2017, Nature, 545, 418. Astronomy: Quasars Signpost Massive Galaxies
3. Bouwens, R.J., Aravena, M., Decarli, M., et al. 2016, Astrophysical Journal, in press, arXiv:1606.05280. “ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: The Infrared Excess of UV-selected z = 2-10 galaxies as a function of UV-continuum Slope and Stellar Mass,” 12 citations
4. Roberts-Borsani, G., Bouwens, R.J., Oesch, P., et al. 2016, Astrophysical Journal, “z>7 galaxies with red Spitzer/IRAC [3.6]−[4.5] colors in the full CANDELS data set: the brightest-known galaxies at z ∼ 7-9 and a probable spectroscopic confirmation at z = 7.48,” 29 citations
5. Bouwens, R.J., Illingworth, G.D., Oesch, P., et al. 2015, Astrophysical Journal, 811, 140. “Reionization After Planck: The Derived Growth of the Cosmic Ionizing Emissivity Now Matches the Growth of the UV Luminosity Density,” 70 citations
6. Holwerda, B., Bouwens, R.J., Oesch, P., et al. 2015, Astrophysical Journal, 808, 6. “The Sizes of Candidate z~9-10 Galaxies: Confirmation of the Bright CANDELS Sample and Relation with Luminosity and Mass,” 19 citations
7. Gonzalez, V., Bouwens, R.J., Illingworth, G., et al. 2014, Astrophysical Journal, 781, 34. “Slow Evolution of the Specific Star Formation Rate at z > 2: The Impact of Dust, Emission Lines, and a Rising Star Formation History,” 82 citations
8. Bouwens, R., Bradley, L., Zitrin, A., et al. 2014, Astrophysical Journal, 795, 126. “A Census of Star- Forming Galaxies in the z ∼ 9-10 Universe based on HST+Spitzer Observations Over 19 CLASH clusters: Three Candidate z ∼ 9-10 Galaxies and Improved Constraints on the Star Formation Rate Density at z ∼ 9.2,” 97 citations
9. Smit, R., Bouwens, R.J., Labbe, I, et al. 2014, Astrophysical Journal, 784, 58. “Evidence for Ubiquitous High-equivalent-width Nebular Emission in z~7 Galaxies: Toward a Clean Measurement of the Specific Star-formation Rate Using a Sample of Bright, Magnified Galaxies,” 78 citations
10. Smit, R., Bouwens, R.J., Franx, M., et al. 2012, Astrophysical Journal, 756, 14. “The Star Formation Rate Function for Redshift z~4-7 Galaxies: Evidence for a Uniform Buildup of Star-forming Galaxies during the First 3 Gyr of Cosmic Time,” 76 citations
11. Oesch, P.A., Bouwens, R.J., Carollo, M., et al. 2010, Astrophysical Journal, 709, L21. “Structure and Morphologies of z ~ 7-8 Galaxies from Ultra-deep WFC3/IR Imaging of the Hubble Ultra-deep Field,” 137 citations
12. Bouwens, R.J., Illingworth, G.D., Franx, M., et al. 2007, Astrophysical Journal, 709, 133. “UV Luminosity Functions at z~4, 5, and 6 from the HUDF and other Deep HST ACS Fields: Evolution and Star Formation History,” 467 citations

2016 PI, NASA/STScI Grant (~$29,000)
2016 PI, NWO TOP Grant (663.435 euros)
2016 PI, NASA/STScI Grant (~$19,000)
2015 PI, Leiden Observatory/Internal Grant (~210.000 euros)
2014 PI, z9-CANDELS, NASA/Space Telescope Science Institute (STScI: $61,379)
2014 Core co-I (PI for earlier submission [2011]), NASA/STScI (~$700,000: HDUV)
–           “The GOODS UV Legacy Fields: A Full Census of
–           Faint Star-Forming Galaxies at z∼0.5-2”
2013 PI, NASA/Spitzer Space Telescope ($5,000)
2013 PI, NWO Open Competition (218.682 euros)
2013 Core co-I (supervised project used to motivate proposal), NASA/STScI (~$518.160)
–          “High level science products from deep
–           ACS+WFC3/IR imaging over the CDF-S region”
2011 PI, NASA/Spitzer Space Telescope ($26,000)
2010 Core co-I, NASA/Spitzer Space Telescope ($104,000)
2009 Core co-I (wrote the proposal), HUDF09 program, NASA/STScI ($922,000)
–       “Galaxies at z∼7-10 in the Reionization Epoch: Luminosity Functions
–      to <0.2L* from Deep IR Imaging of the HUDF and HUDF05 Fields”
2009 PI, NWO Open Competition. A 4 year PhD position (212,000 euros)
2007 PI, NASA/STScI ($245,872)


Over the past 10 years, I have given an average of 5 invited presentations per year at peer-review international conferences. Here is a list of meetings where I have given invited presentations over the past 4.5 years:

2016 Invited Speaker, High Z 2016, Valletta, Malta
–       Invited Speaker, EWASS Meeting on the Frontier Fields, Honolulu, USA
–       Invited Speaker, Cosmic dawn of galaxy formation, Paris, France

2015 Invited Speaker, Exploring the Universe with JWST, Noordwijk, Netherlands
–      Invited Speaker, IAU GA Meeting on the Frontier Fields, Honolulu, USA
–      Invited Speaker, Star Formation History of the Universe, Garching, Germany

A link to my professional CV can be found here.  Here is my CV in pdf form.