123 search results for “exoplanets” in the Public website
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Spectroscopic characterization of exoplanets: From LOUPE to SINFONI
Over the past years it has been discovered that the population of extra-solar planets is large and diverse.
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High-resolution integral-field spectroscopy of exoplanets
This thesis describes the implementation and on-sky demonstration of high-resolution integral-field spectroscopy for extreme adaptive optics systems that are used to find and characterize exoplanets.
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Exo-planets, star and planet formation
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.…
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Exo-planets, star and planet formation
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…
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Don't Blink: Detecting transiting exoplanets with MASCARA
This thesis describes the Multi-site All-Sky CAmeRA (MASCARA), which consists of two small robotic telescope designed to detect exoplanets around the brightest stars in the sky.
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Novel approaches for direct exoplanet imaging: theory, simulations and experiments
The next generation of high-contrast imaging instruments on space-based observatories requires sophisticated wavefront sensing and control in addition to a high-performance coronagraph.
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light curves: adaptive optics microscopy and peculiar transiting exoplanets
Promotores: Prof.dr. C.U. Keller, Prof.dr. H.C. Gerritsen
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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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a Sea of Starlight: Enabling technology for the direct imaging of exoplanets
Promotor: Christoph U. Keller, Co-promotores: Matthew A. Kenworthy, Frans Snik
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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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Superstorm on exoplanet
Dutch astronomers have measured a superstorm for the first time in the atmosphere of an exoplanet, the well-studied “hot Jupiter” HD209458b. The very high-precision observations of carbon monoxide gas show that it is streaming at enormous speed from the extremely hot day side to the cooler night side…
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Dutch ‘big data’ telescope finds exoplanets
Astronomers at Leiden University have discovered the first planets using a new instrument: the planet hunter MASCARA. This instrument, developed at Leiden Observatory, looks specifically for planet transitions around the brightest stars in the sky, which surprisingly enough have so far have hardly been…
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Astronomers finally measure polarised light from exoplanet
An international team led by Leiden astronomers has, after years of searching and defying the boundaries of a telescope, for the first time directly captured polarised light from an exoplanet. From this light they can deduct that a disk of dust and gas orbits the exoplanet. In this disk moons are possibly…
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A YouTube channel for exoplanet researchers
Professor Ignas Snellen has developed an online platform where exoplanet researchers can post videos about their work: exoplanet-talks.org. ‘For young researchers in particular it’s a way to bring their research to people’s attention.’
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Incentive for research on exoplanets and free will
Two Leiden scientists - Ignas Snellen and Bernhard Hommel - have been awarded an ERC Advanced Grant. The grant will fund their research over the coming five years on exoplanets and free will.
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Giant rings orbit wrong way around exoplanet
Researchers from Japan and the Netherlands who were previously involved in the discovery of an exoplanet with huge rings have now calculated that the giant rings may persist more than 100,000 years, as long as the rings orbit in the opposite direction to that of the planet around the star. Their findings…
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Atmospheres of hot alien Worlds
Promotor: Prof.dr. I.A.G. Snellen, C.U. Keller
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Gigantic ring system discovered around exoplanet J1407b
Astronomers from the Leiden Observatory and from the University of Rochester (in the US) have discovered that the planetary ring system that covered the very young sun-like star J1407 is actually of enormous proportions. In fact, it’s much larger and heavier than the ring system surrounding Saturn.…
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From midplane to planets : the chemical fingerprint of a disk
This thesis addresses the chemical processes that determine the compositions of giant planet atmospheres.
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Two temperate Earth-mass planet candidates around Teegarden’s Star
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…
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Veni grant for research into the youngest exoplanets
The Netherlands Organisation for Scientific Research has awarded Leiden astronomer Giovanni Rosotti a Veni grant for research into very young exoplanets. This grant offers young researchers the possibility to develop their innovative ideas for a period of three or four years.
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Halo of gas shows how exoplanets are slowly losing their atmosphere
Twee teams of astronomers, including from the universities of Amsterdam and Leiden, have discovered how hot gas giants are surrounded by large halos of thin helium gas, an indication that they are slowly losing their atmosphere. The helium, that was recently seen for the first time by the Hubble space…
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MASCARA stations hunt for exoplanets orbiting bright stars
For a number of years, two ‘boxes’ in the Canary Islands and Chile have been scouring the skies for exoplanets that orbit bright stars. PhD candidate Geert Jan Talens helped develop these ‘MASCARA’ telescopes and has made the first discoveries with them. Together with him, we answer the main questions…
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LOFAR pioneers new way to study exoplanet environments
Using the Dutch-led Low Frequency Array (LOFAR) radio telescope, astronomers have discovered unusual radio waves coming from the nearby red dwarf star GJ1151. The radio waves bear the tell-tale signature of aurorae caused by an interaction between a star and its planet. The radio emission from a star-planet…
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Spinning worlds
Promotor: I. A. G. Snellen, Co-promotor: M. A. Kenworthy
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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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Oort Lecturer 2018: James Kasting about the search for life on planets around other stars
If there is life outside our galaxy, how could we find it? In his Oort Lecture, James Kasting talks about his search for simple life on other planets. Kasting was in the Netherlands for two weeks, because he was invited as the Oort Professor 2018.
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Inferno Worlds
A remarkable population of short period transiting rocky exoplanets with equilibrium temperatures on the order of 2,000 K has recently been discovered.
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Extrasolar Planet Detection Through Spatially Resolved Observations
Promotor: Prof. dr. I. Snellen, Co-Promotor: Dr. M. Kenworthy
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More insight with light
The new programme Synoptic Optics, funded by the NWO Domain Applied and Engineering Sciences, will develop new optical techniques. Researcher Frans Snik and Professor of Experimental Astrophysics Christoph Keller from Leiden Observatory will test novel approaches to monitor air pollution and discover…
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Searching for life in the Universe
Is there extra-terrestrial life out there? It now looks as though we can sketch out an answer to this enduring question. Leiden Observatory is helping to build new instruments to find the most promising exoplanets.
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Predicting the future: Predictive control for astronomical adaptive optics
The field of exoplanet research is rapidly advancing through the development of new technology, observing techniques, and post-processing methods.
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Bernhard Brandl
How do massive stars form? What molecular species hide in the Martian atmosphere? Are there Earth-like exoplanets in habitable zones? These questions can be answered using the Extremely Large Telescope (ELT), which will be built over the next six to seven years. ‘To make these future discoveries possible,…
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Emiel Por
Emiel Por is our Leiden Observatory's nominee for the C.J. Kok Jury Award 2020.
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Starquakes and Exoplanets in our Milky Way
Lecture, Oort lecture 2019
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Research
Research at Leiden Observatory spans the full width of modern astrophysical enquiry. It is based on observation, theory, simulation, and experiment. Two broad clusters characterize the ongoing research. Within each theme, researchers carry out their personal and specialized research programme. The two…
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Leiden Observatory
With each discovery that is made, the universe reveals a fraction of its secrets: the most distant galaxies and quasars, the atmosphere of exoplanets, evidence of dark matter, complex molecules in space. This is what fills the days and nights of the researchers from the Leiden Observatory and their…
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Novel approaches for direct exoplanet imaging: theory, simulations and experiments
PhD Defence
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Spectroscopic characterization of exoplanets: From LOUPE to SINFONI
PhD Defence
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Don't Blink: Detecting transiting exoplanets with MASCARA
PhD Defence
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High-resolution integral-field spectroscopy of exoplanets
PhD Defence
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TOP grant for four of Leiden’s top scientists
Four scientists will receive the TOP grant for Physical Sciences from the NWO (Netherlands Organisation for Scientific Research). They are astronomer Ignas Snellen, mathematicians Tim van Erven and Charlene Kalle and computer scientist Siegfried Nijssen. The funds will be used to finance temporary research…
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Move of SRON space research institute to South Holland now official
By adding their signature to the collaboration agreement on 31 May, Leiden University, TU Delft, space research institute SRON and NWO confirmed the move of SRON from Utrecht to South Holland. From 2021, the headquarters of the space research institute will be located on the Campus of Leiden Univ…
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From grains to planetesimals: the microphysics of dust coagulation
Promotor: Prof.dr. A.G.G.M. Tielens, Prof.dr. C. Dominik (UvA)
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Leiden discovery of planetary births is worldwide news
In Germany, the United States and even in Vietnam: all over the world, the Leiden discovery of the birth of two planets was shared. Astronomer Sebastiaan Haffert and his team were able to record multiple planets in the making for the first time and published their findings in Nature Astronomy. A unique…
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Explore the universe in VR
Navigating through the universe with VR glasses? It is possible, with the help of the new computer application built by Marc Driessen, a Computer Science student at Leiden University. As part of the course Human Computer Interaction (HCI), he developed a Virtual Reality Experience of our galaxy in about…
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Astronomers capture first-ever image of a multi-planet system around a Sun-like star
An international team led by Leiden astronomers has taken the first-ever image of a young, Sun-like star accompanied by two giant exoplanets. The researchers used The European Southern Observatory’s Very Large Telescope for this, known as ESO’s VLT. Images of systems with multiple exoplanets are extremely…
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with starlight: optical techniques for the high-contrast imaging of exoplanets
PhD Defence
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a Sea of Starlight: Enabling technology for the direct imaging of exoplanets
PhD Defence
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Infrared spectroscopy of astrophysically relevant hydrocarbons
This thesis is about the study of hydrocarbons via infrared spectroscopy.