2018/2019 Young Scientist Prize

Call for nominations for 2018 and 2019 IUPAP Young Scientist Medals in the field of Astrophysics – Deadline: 15 August 2019

The IUPAP Young Scientist Medals of 2018 and 2019 and Cash Prizes of 1,000 EUR will be awarded for two scientists working in the field of astrophysics. The winners will be invited to give a presentation of scientific achievements at the 29th Texas Symposium on Relativistic Astrophysics (TEXAS-2019, which will be held on 15-20 December 2019 in Portsmouth, UK).


  • The nominated candidate must not have completed more than eight years of research after their doctorate by December 2018 and 2019, respectively. Interruptions for military service, family emergencies, etc., (but not teaching) are allowed.
  • One Medal cannot be shared between several candidates. Nominations may be made by anyone with an interest in the field.
  • Self-nominations are not permitted, but a candidate could ask a mentor or colleague to provide a nomination.

The nomination papers must include:

– A citation of approximately 50 words.
– Curriculum vitae of the candidate, which must not exceed two pages in length.
– List of 6 of the candidate’s most significant publications, including citation information, not to exceed one page.
– Commentary on the publications, which makes the case for the award, not to exceed two pages.
– Two letters of support (up to a maximum of three pages), at least one of which must come from someone not at the nominee‘s institution and not a mentor or significant collaborator.

The documents must be collated into a single pdf file called  Surname_ysm.pdf, where Surname is the candidate’s name. The file must not exceed 2MB in size.

Nominations not conforming to these rules cannot be accepted.

The Medal winners will be selected by a committee composed of the members of the IUPAP Astrophysics Committee (C19).

Nominations should be sent on or before 15 August 2019 to the Chair of IUPAP C19 (Gerry Gilmore) by e-mail

For information on the International Union of Pure and Applied Physics see


2016/2017 Young Scientist Prize


Dr Pratika Dayal – University of Groningen (NL)

“For her work as a theorist, combining analytic theory, numerical simulations and data interpretation, which has significantly contributed to building tantalising bridges between fields as diverse as astrophysics, particle cosmology and astrobiolog.”

The 2017 IUPAP Young Scientist Prize in Astrophysics was awarded to Pratika Dayal, “who combines great insight with an unquenchable desire to understand the Universe. Combining analytic theory, numerical simulations and data interpretation, her research has significantly contributed to building tantalising bridges between fields as diverse as astrophysics, particle cosmology and astrobiology.”

Pratika Dayal was born in 1984 in Chandigarh, India. She received a Masters degree in Astronomy from the University of Sussex in 2006, where she studied the triaxiality of elliptical galaxies. Her doctoral research, carried out at the International School for Advanced Studies (SISSA, Trieste) from 2006-2010, focused on modelling galaxies in the first billion years to put robust constraints on the end stages of reionization and unveiling their physical properties. She then held postdoctoral fellowships at the Leibniz Institute for Astrophysics (Potsdam, Germany) and the Institute for Astronomy (Edinburgh, U.K.) where she combined the latest datasets and theoretical models to show that the earliest galaxies observed by the Hubble Space Telescope could be the smallest progenitors of galaxies like our own Milky Way. She then moved to the Institute of Computational Cosmology (Durham, U.K.), to take up an Addison Wheeler fellowship, where she opened up new lines of astrobiological research, ranging from modelling the habitability of the Milky Way to that of the entire Universe over 13 billion years.

Since 2016, Pratika Dayal has held an assistant professorship and Rosalind Franklin Fellowship at the Kapteyn Astronomical Institute at the University of Groningen where she is leading calculations for the for the forthcoming era of 21cm cosmology with the Square Kilometre Array. In addition to support from the University of Groningen, since 2017 her group has been supported by the European Research Council’s starting grant.


Dr Nikku Madusudhan – University of Cambridge (UK)

“For his pioneering and outstanding contributions to the characterization of exoplanetary atmospheres which have led to the first insights into various physical processes and chemical compositions of exoplanetary atmospheres, and have laid the foundations for understanding planetary formation and migration based on exoplanetary atmospheric compositions.”

Dr. Nikku Madhusudhan was born in 1980 in India and pursued his undergraduate studies at the Indian Institute of Technology, Banaras Hindu University, in Varanasi, India. He then went to the Massachusetts Institute of Technology (MIT) in Cambridge, Massachusetts, USA, where he obtained a masters degree in engineering in 2004 and a PhD in Physics (astrophysics division) in 2009. After his PhD, he held postdoctoral positions at MIT (2009-2010), Princeton University (2010-2011), and Yale University (2012-2013) where he was the YCAA Prize Postdoctoral Fellow. In 2013, he joined the faculty of the Institute of Astronomy at the University of Cambridge, UK, as a university lecturer in astrophysics. In 2017, he was promoted to a tenured Readership (equivalent associate professorship) in astrophysics and exoplanetary science at Cambridge.

Dr. Madhusudhan has made several seminal contributions to the study of exoplanetary atmospheres over the past decade. His PhD work gave birth to exoplanetary “atmospheric retrieval”, which allows statistical estimation of atmospheric properties of exoplanets from their observed spectra. This work and its variants have made possible detailed measurements of atmospheric chemical abundances and temperature profiles of various exoplanets and sub-stellar objects ever since. His work led to the first statistical constraints on atmospheric chemical abundances, temperature profiles, non-equilibrium chemical processes, etc, in numerous objects. In another major development, in a series of papers in 2011-2012, he demonstrated the feasibility of measuring carbon-to-oxygen (C/O) ratios in hot giant exoplanets and demonstrated the critical implications of C/O ratios for various atmospheric and interior properties of exoplanets. These works have galvanized intense activity both in theoretical and observational studies to investigate C/O ratios in exoplanets and sub-stellar objects, and the C/O ratio has emerged to be the most desirable observable in exoplanetary atmospheres with upcoming large facilities such as the JWST. Among other results, his work also suggested unexpectedly low H2O abundances in several hot Jupiters. Such chemical measurements have motivated new interdisciplinary efforts for connecting exoplanetary atmospheric compositions to their formation processes, a frontier area where Dr. Madhusudhan has also played a pioneering role in recent years.

Dr. Madhusudhan’s scientific contributions and leadership role have been widely recognized in exoplanetary science and astrophysics. His work has been recognized with the Yale YCAA prize fellowship in 2011 and the 2014 Vainu Bappu Gold Medal in astrophysics in 2016, followed by the present 2016 IUPAP Medal in astrophysics, besides numerous invitations to seminars/colloquia/conferences, review talks/papers, and large projects.

2015 Young Scientist Prize

The 2015 IUPAP Young Scientist Prize in Astrophysics was awarded to Sylvain Guiriec for his “insightful and innovative contributions towards understanding the nature of Gamma Ray Burst (GRB) prompt emission, in particular the establishment of multi-component spectra, and the discovery of a new Peak Energy – Luminosity relation showing that GRBs can be used as standard candles and thereby as unique cosmological probes.”

Sylvain GuSylvain Guirieciriec was born in 1978 in Brest, France. In 2002 – 2003, he obtained a Masters degree in Material Sciences as well as an Engineering degree in Atomic and Molecular modeling and simulation, and computational structural analysis and design from the Institut Superieur des Materiaux du Mans, France. He worked for two years as a young researcher at the Oak Ridge National Laboratory, USA, and at the Universitat Politecnica de Catalunya, Spain, where he studied radiation damage for the nuclear research field. In 2004, he obtained a Masters degree in Astrophysics, Planetology and Space Sciences & Techniques and an Engineering degree in Space Sciences & Techniques from Paul Sabatier University and the Institut Superieur de l’Aeronautique et de l’Espace (SUPAERO), France. He received his PhD in December 2007 in Astrophysics from the Montpellier II University, France. His thesis was both theoretical and instrumental: (i) he studied the theoretical aspects of GRBs and made predictions of observability with the Fermi Gamma-ray Space Telescope (Fermi), and (ii) he participated to the integration and tests of the Fermi/Large Area Telescope (LAT), for which he developed an algorithm for suppressing its proton background.

After the launch of Fermi mid-2008, Sylvain Guiriec joined the National Space Science and Technology Center, USA – associated to the NASA Marshall Space Flight Center – with a 3-year postdoctoral position at the University of Alabama in Huntsville, USA. His main efforts focused on the observational analysis of GRBs, leading to the discovery of the first clear evidence for photospheric emission in their prompt emission. He also worked on Magnetars, Solar Flares and Terrestrial Gamma-ray Flashes. Since 2011 Sylvain Guiriec worked at NASA Goddard Space Flight Center, USA, first as a fellow of the NASA Postdoctoral Program and then as an Assistant Research Scientist affiliated with the University of Maryland, College Park and the Center for Research and Exploration in Space Science & Technology.

2014 Young Scientist Prize

The 2014 IUPAP Young Scientist Prize in Astrophysics was awarded to Nanda Rea for her “her valuable contribution to the study of neutron stars. In particular for the discovery that magnetars can have low dipolar magnetic fields in line with the normal pulsar population, at variance with the long-standing belief that the electron critical magnetic field was a lower limit for magnetar-activity to take place.”

Nanda ReaNanda Rea was born in 1978 in Rome, Italy. She graduated from the University of Tor Vergata/INAF- Astronomical Observatory of Rome in 2006. Since then she spent several years with different post-doctoral fellowships (at SRON and The University of Amsterdam). In 2009 she started a 5 year tenure-track at the Institute for Space Sciences (ICE) in Barcelona, part of the CSIC (the Spanish National Research Council). In 2014 she was awarded an NWO Vidi grant to build a research group in The Netherlands. She is currently a tenured staff scientist at CSIC, and a research group leader at the Anton Pannekoek Institute of the University of Amsterdam.

Since her PhD years, Nanda Rea has worked on several aspects of neutron stars, both observationally and on the interpretation side. She was invited for colloquia and seminars in many worldwide institutes (Harvard, NYU, Max Plank, University of Sydney, ATNF, IAC, and others). In 2014 she was awarded the Zeldovich Medal for Astrophysics and Space Science from COSPAR and the Russian Academy of Science, for her crucial contribution to the understanding of neutron stars with strong magnetic fields.