What is the origin of solar systems?

An international team led by Leiden astronomers has discovered why the two stars of binary star DI Herculis rotate so strangely around one another, which once even proved problematic for Einstein's theory of relativity. Their findings were published in Nature.

Multiple stars, that is two or more stars composing a gravitationally bound system, are common in the universe.

Pulsars were first discovered in 1967 and since then the population has grown and expanded over several wavelengths.

The high velocity tail of the total velocity distribution of stars provides essential insight into fundamental properties of the Galaxy.

Conference

Promotor: Prof.dr. E.F. van Dishoeck, Co-Promotor: M.R. Hogerheijde

In 2018, Leiden astrophysicist Ewine van Dishoeck won the Kavli Prize in Astrophysics. At the Faculty's New Year's Reception 2019, she announced that she would start a new award for young science talents, financed by her prize money: the Young Star Award.

Within this project, PeptoMiktoStars were realized through an orthogonal protecting group strategy and should be investigated further regarding their potential as drug delivery systems in the field of drug delivery to inflamed areas in cancer, bacterial infections or autoimmune diseases.

OB associations are loose groups of young, massive stars. They constitute the last stage of the massive starformation process, and the context in which new stars are formed.

This thesis develops a method for direction dependent calibration of the ionosphere in radio interferometric data.

Perform cutting-edge research in the area of the STAR mathematics cluster.

In the large gas clouds between the stars, chemical reactions take place under extreme conditions, giving rise to both small molecules, such as water and common salt, as well as large complex molecules that can serve as the building blocks of life. This is known as astrochemistry and it is something…

When observing star-forming galaxies, we are not only seeing stellar light, but we also see how this interacts with galactic gas and dust. This thesis contains studies of the stellar, nebular and dust properties of low mass star-forming galaxies.

One of the key quests in astronomy is to study the growth and evolution of galaxies across cosmic time. Radio observations provide a powerful means of studying the formation of stars and subsequent buildup of distant galaxies, in a way that is unbiased by the presence of dust.

At Leiden Observatory, researchers investigate the origin of stars and their planetary systems. They detect and characterize planets around other stars, which are called exo-planets. They study how stars and planets form. And they follow molecules from interstellar clouds to nascent planet systems.…

Promotor: F.P. Israel, Co-Promoter: R. Meijerink

Promotor: P. T. de Zeeuw, Co-promotor: N. Neumayer; G. van de Ven

At Leiden Observatory, researchers investigate the origin of stars and their planetary systems. They detect and characterize planets around other stars (exoplanets). They study how stars and planets form. And they follow molecules from interstellar clouds to nascent planet systems. This way they address…

Dust particles in space form the basis for new stars and planets. But what do these particles consist of and how do they behave? Sascha Zeegers studied this. PhD defence 1 November.

It is well known that photography means writing with light. However, the meaning of “with” can be ambiguous. Film can be exposed outside of the camera. Historically, people have done so to render visible other forms of radiation than what we call light. In mid-2013, Andrew Littlejohn took several rolls…

Promotor: Prof.dr. E.F. van Dishoeck, Co-promotor: S. Bruderer

Promotor: Prof.dr. V. Icke, Co-Promotor: T.I. Madura

The Old Observatory houses four historical telescopes. On this page you can learn more about them.

In a century replete with radical politics, final liberations, historical codas, and dreams of eternity, the shadowy figure of Louis-Auguste Blanqui, the constant revolutionary, wrote Eternity by the Stars in the last months of 1871 while incarcerated in Fort du Taureau, a marine cell of the English…

Promotores: S.F. Portegies Zwart, E. M. Rossi

The origin and evolution of galaxies are closely tied to the cyclic feedback processes between stars and the interstellar medium (ISM).

Why do some children confront social challenges with confidence, whereas others experience difficulties? What is the role of child temperament and child emotional dispositions? What is the role of parenting? This project aims to shed light on the mechanisms explaining shyness and confidence in response…

Rossi

Show People offers a comprehensive history of the film star from Mary Pickford to Andy Serkis, traversing more than one hundred years and drawing on examples from America, Britain, Europe, Asia and elsewhere.

Promotor: Prof.dr. M. Franx, Co-Promotor: Rychard Bouwens

How did galaxies form? How did galaxies evolve?

For centuries astronomers studied the Universe by collecting light. Nowadays, we are living in times of great technological advancements, which allow us to explore our Universe in a new way - though gravitational wave radiation.

Leiden University has participated in an international study carried out by the CARMENES consortium, which has discovered two small, terrestrial planets around Teegarden’s Star. The planets have masses similar to Earth and their temperatures could be mild enough to sustain liquid water on their surf…

Promotor: Prof.dr. E.F. van Dishoeck, Prof.dr. F.F.S. van der Tak (RUG)

Promotores: Prof.dr. A.G.G.M. Tielens & Prof.dr. L. Kaper (UvA)

Promotores: Prof.dr. M. Franx & Prof.dr. P.G. van Dokkum (Yale University)

A century ago, it was unclear whether the stars in the sky were clustered in groups, or widely spread in the universe.

Binary systems, consists of five electronic compositions, in each of which Richard Barrett worked with a specially made recording from an improvising instrumentalist to produce a new kind of compositional collaboration: Daryl Buckley (electric lap steel guitar), Ivana Grahovac (cello), Lori Freedman…

The development of literary celebrity by focusing on five famous Dutch authors from the nineteenth century

In which way was literary celebrity constructed in the nineteenth century and what forms of fandom were there?

A large diversity of exoplanetary systems has been found, but it is still unclear what drives this diversity.

What is neutron star matter?

Disk formation around stars is an important factor in determining whether one or multiple stars evolve. But the big picture of star formation is still far from complete, says PhD researcher Nadia Murillo.

A team of Leiden astronomers used the latest set of data from ESA’s Gaia mission to look for high-velocity stars being kicked out of the Milky Way, but were surprised to find stars instead sprinting inwards – perhaps from another galaxy.

For the first time, astronomers have detected the presence of complex organic molecules, the building blocks of life, in a protoplanetary disc surrounding a young star. The discovery reaffirms that the conditions that spawned the Earth and Sun are not unique in the Universe. The results are published…

Astronomer Alexander Mushtukov, currently working at the University of Amsterdam, received a Veni grant of 250,000 euro’s which he will execute in Leiden. Supervised by Simon Portegies Zwart, Mushtukov will use advanced simulations to understand the unknown physics in extremely bright neutron stars.

Promotores: R. Tijdeman, K.J. Batenburg