117 search results for “protoplanetary discuss” in the Public website
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Sizing up protoplanetary disks
This thesis focuses on protoplanetary disks: flattened structures of gas and dust around young stars in which planets are expected to form and grow.
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Tracing the evolution of protoplanetary disks
Promotores: Prof.dr. A.G.G.M. Tielens, Prof.dr. L.B.F.M. Waters (UvA), Prof.dr. C. Dominik (UvA)
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The puzzle of protoplanetary disk masses
My work focuses on a class of astronomical objects called protoplanetary disks.
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The Demographics of Protoplanetary Disks: from Lupus to Orion
The work presented in this thesis is based on ALMA surveys of protoplanetary disks in three star-forming regions: Lupus, OMC-2, and NGC 2024.
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High-Contrast Imaging of Protoplanetary Disks
To study how planetary systems come into existence we study much younger systems still in formation.
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Protoplanetary disk anatomy: examining the structure and chemistry of planetary birthplaces with simple molecules
This thesis examines the link between simple molecules and the underlying structure and chemistry within protoplanetary disks - the birthplaces of planets.
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Not so smooth after all: resolving dust and gas structures in protoplanetary disks
A large diversity of exoplanetary systems has been found, but it is still unclear what drives this diversity.
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Imaging polarimetry for the characterisation of exoplanets and protoplanetary discs. Scientific and technical challenges
Promotor: C.U. Keller, Co-Promotor: F. Snik
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Revealing the origins of solar systems: examining the formation of proto-planetary disks and binary stars
What is the origin of solar systems?
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Searching explanations for mysterious structures in protoplanetary disks
In the discs of dust and gasses around young stars, mysterious structures occur. Together with professor Ewine van Dishoeck, PhD student Paolo Cazzoletti investigate how we can explain these forms, such as rings, spirals and holes. On 12 December, he will defend his thesis.
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Inextricable ties between chemical complexity and dynamics of embedded protostellar regions
Promotor: E. F. van Dishoeck, Co-promotor: C. Walsh
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Linking simple molecules to grain evolution across planet-forming disks
Planets are formed in disks of gas and dust around young stars.
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Uncovering the ingredients for planet formation
This thesis discusses the physical and chemical processes than influence the composition of forming planets.
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Mining the kinematics of discs to hunt for planets in formation
Detecting planets during their formation stages is crucial for understanding the history and diversity of fully developed planetary systems like our own. However, observing young planets directly is challenging because they are often deeply embedded within their host protoplanetary discs, rich in gas…
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Mind the gap: gas and dust in planet-forming disks
Promotores: Prof.dr. E.F. van Dishoeck, Prof.dr. C.P. Dullemond
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Imaging the water snow line within a protoplanetary disc
Research using the ALMA telescope by scientists including Leiden's John Tobin and Steven Bos has produced the first images of the water snow line within a protoplanetary disc. Publication in Nature on 14 July.
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Chemistry in embedded disks: setting the stage for planet formation
To address the fundamental questions of how life on Earth emerged and how common life may be in the Universe, it is crucial to know the chemical composition of the planet-forming material.
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Turtles all the way down: multiscale simulations connecting star and planet formation
The formation of stars and planets happens over multiple scales, which can interact. In particular, planet formation happens in the dense, complex environment of star forming regions.
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Freezing conditions in warm disks: snowlines and their effect on the chemical structure of planet-forming disks
This thesis focusses on the temperature structure in protoplanetary disks. The relation between structures seen in the dust and gas-phase molecules is investigated.
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Ice and Gas in Protostellar Clouds and Planet-forming Disks
This thesis takes steps toward understanding the interaction between gas-phase and solid-state molecules in star- and planet-forming regions.
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Ingredients of the planet-formation puzzle
High-angular-resolution observations of the circumstellar material have uncovered numerous and very diverse substructures in protoplanetary discs, raising the question of whether they are caused by forming planets or other mechanisms.
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Protostellar jets and planet-forming disks: Witnessing the formation of Solar System analogues with interferometry
The focus of this thesis is how stars like our Sun and planets like Jupiter, Saturn, and Earth are formed.
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The Infrared Spectrum of Massive Protostars
We have conducted a full spectral line survey of the 3-13 micron region of two massive protostars, AFGL 2591 and AFGL 2136, for the first time at high spectral resolution.
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Lukasz Tychoniec
Science
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SBC Discussions
Presenters will be expected to give a proper introduction of the project and describe their aims in a clear and concise manner. Progress and problems will be addressed to evoke a discussion. Undergraduate students are also supposed to present their work when their daily supervisor is scheduled.
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Group Discussions
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Panel discussions
At our regular panel discussions we bring together scholars and other experts to discuss a current topic that captures the interest of the general public as well as academics.
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Simulating the birth environment of circumstellar discs
Circumstellar discs are the reservoirs of gas and dust that surround young stars and have the potential to become planetary systems.
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Planet formation: food for thought
Planet formation is a surprisingly homogeneous process that does not take place gradually from inside out, but that occurs everywhere at the same time in a proto-planetary disc, as Dave Lommen has discovered. He will obtain his doctorate this week based on his research into the dust around young stars…
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From molecules to planets: Exploring the chemical heritage of solar systems
Walsh
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Book “Terrorisme”: discussing core questions about terrorism
Recently, Europe was again shaken by some attacks. This ‘Elementair Deeltje’ places terrorism in a historical perspective and gives an up-to-date overview of this form of political violence.
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Astronomer Jos de Boer receives Chesneau Prize for best dissertation
Astronomer Jos de Boer has received the Chesneau Prize in Nice for his research into so-called protoplanetary disks. The prize is awarded to the best astronomical dissertation in the field of high angular resolution. 'I consider it a good opportunity to talk about my research.'
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Research Projects, Categories and Supervisors
These are the proposed research projects for LEAPS 2019. Please note that not all projects will go ahead and some may still be added in the near future. Final funding decisions lie with the Faculty sponsors. And please make a note that if you are interested in an ESA project, to check if your state…
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Risk perception and interpersonal discussion on risk: A systematic literature review
This article aims to provide a coherent foundation for empirical studies of interpersonal discussion on risk.
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Small scale kinematics of massive star-forming cores
Promotor: Prof.dr. E.F. van Dishoeck, Co-Promotor: M.R. Hogerheijde
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Planet formation starts before a star is fully grown
A team of European astronomers under Leiden leadership has discovered that dust particles around a star already coagulate before the star is fully grown. These agglomerated dust particles are the first step in the formation of planets. The research publish their discovery in the journal of Nature As…
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Grotius Centre contributes to ICC ASP Expert Discussion on Effectiveness and Efficiency
On 24 November 2015, Prof. Carsten Stahn participated as external expert in a special plenary session of the Assembly of States Parties on the efficiency and effectiveness of Court proceedings, chaired by the co-chairs of the Study Group on Governance of the Assembly.
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Painting with starlight : optical techniques for the high-contrast imaging of exoplanets
This thesis describes the development and validation of new high-contrast imaging techniques, with the ultimate goal of enabling the next generation of instruments for ELT-class telescopes to directly image Earth-like extra-solar planets orbiting around nearby stars.
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Astronomers see star with dust disk that is still being fed
An international team of astronomers including Leiden scientists publishes the image of a young star with a surrounding dust disk that is still being fed from its surroundings. The phenomenon around the star SU Aur may explain why so many exoplanets are not neatly aligned with their star. The European…
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Discussing Business Rescue in Cascais
From 21-22 September 2016, The INSOL Europe Academic Forum met in Cascais (Portugal). The Business Rescue in Insolvency Law project team of the European Law Institute was present with two research assistents.
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LUGO Discussion: Sustainability in Leiden University
Always wanted to give your input on sustainability for the university's new Strategic Plan? Join LUGO's discussion session!
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Carel Stolker discusses research impact
Rector Magnificus Carel Stolker retired on 8 February. If there was one theme running through his career, it was the links between the University and society. Before he left, Stolker spoke one last time to people from within and without the university about the societal impact of research. On topics…
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Searching for the origins of life in space with 8.9 million euros
With 8.9 million euros from the Danish National Research Foundation, Aarhus University and Leiden Observatory will establish the Center for Interstellar Catalysis. The centre is led by Aarhus professor Liv Hornekær and aims to find out how and when the building blocks of life formed in the Universe.…
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Christa Tobler discusses indirect discrimination in Vilnius
On 13 June, Professor Christa Tobler spoke about indirect discrimination at the Vilnius Gediminas Technical University in Lithuania.
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International group of scholars discuss Japanese protests
In 1968 Japan was shocked by student protests and even today, exactly fifty years later, their effects can still be felt. An interdisciplinary group of researchers recently met to discuss them at Leiden University.
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Discussing the NSE: the national student survey
Last January, 20th, a new NSE-lunch-discussion took place. The NSE is an annual national survey among all bachelor and master students, and asks them about may topics regarding their programmes. During the lunch discussion, we highlighted several topics that stood out in the NSE-results for our program:…
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Business Rescue: interim results discussed in Ferrara
From 7-9 September the Annual Conference of the European Law Institute (ELI) was held, this time kindly hosted by the University of Ferrara in Italy. The ELI has adopted a project on the Rescue of Insolvency Law. Professors Bob Wessels and Stephan Madaus, Project Reporters, attended the Annual Conference…
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Extensive discussions on Business Rescue in Europe
On 19 and 20 March, the reporters of the ELI Project on Rescue of Business in Insolvency Law (Prof. Bob Wessels Prof. Stephan Madaus, Halle-Wittenberg, Ass. Prof. Kristin van Zwieten, Oxford) chaired a conference to present the preliminary results of this project. The project, initiated by the European…
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Anna wants to weigh solar systems
All the planets in our solar system orbit around the Sun in an ecliptical plane. This is to be expected because our solar system was formed from a so-called protoplanetary disc. PhD candidate Anna Miotello has studied these kinds of discs and how they influence the formation of stars and planets. PhD…
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Leiden scientists discuss elections in online session
During the online panel discussion ‘Het spel en de macht’ (the game and the power) held on 9 March, six members of Leiden’s Centre for Dutch Politics and Governance (CNPB) discussed trends regarding the current and previous general elections. Will it be tense, this campaign? ‘Baudet probably still has…