https://www.christian-ginski.com/media-outreach daily 0.75 2025-08-27 https://www.christian-ginski.com/contact daily 0.75 2023-03-02 https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/1597666253607-IAO027B7AS0U7TCX9TIU/paranal-sunrise-3.jpg Contact - Contact me christian.ginski@universityofgalway.ie Visit me Room: PHY 241 Arts / Science Building University Road H91 TK33 Galway Ireland https://www.christian-ginski.com/about daily 0.75 2020-08-20 https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/1597692986329-VXI7TZQ76C1QOWNCQNLF/telescope_me.jpg About me - About me I grew up in the small German town of Jena in the state of Thuringia. With the Zeiss company headquarters located in town and its famous Planetarium, I was probably predisposed for a career in astronomy. I obtained my Masters in Physics at The Friedrich Schiller University in Jena. I used Hubble Space Telescope archival data to search for extra-solar planets around nearby stars. Before I saw the light that is Python, I used IRAF to write a now long forgotten package to obtain detection limits in HST data. Ralph Neuhaeuser later offered me a position as PhD student in his group in Jena. During the course of my studies I used the NACO adaptive optics instrument at the ESO Very Large Telescope to follow the orbit of known directly imaged planets and brown dwarfs around nearby stars. Even though the their orbits are often hundreds of years long, it was possible to constrain inclination and eccentricity of some systems and speculate about their formation history. Having completed my PhD in 2012 I took a postdoc position in Jena, to study the multiplicity of exoplanet host stars together with Markus Mugrauer. In 2014, I moved to Leiden Observatory in the Netherlands to work with Christoph Keller and Matthew Kenworthy on the commissioning and scientific exploitation of the SPHERE extreme adaptive optics system. In 2018 I went to work with Carsten Dominik, the leader of the circumstellar disk research group of the SPHERE consortium, at the University of Amsterdam. My current research focus is scattered light imaging of circumstellar disks in the near infrared as well as complementary observations across the wavelength spectrum, and radiative transfer modelling. I also remain on the lookout for the occasional planet :) https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/1597693246096-FZZUDJOGR65GNMU50OVR/GSH-2.JPG About me Home away from home during the course of my PhD at the Astrophysical Institute and University Observatory Jena. This is the Observatory with its 1m telescope located in the small nearby town of Grossschwabhausen in the middle of a forest preserve. I spent more than 100 nights here, mostly observing transits of extrasolar planets for my fellow students and postdocs. https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/1597694220907-1L5DBYQFPZQ9GTR0REBD/hd185269-sphere-astralux.jpg About me A system that will always be near and dear to my heart. HD185269 is an evolved nearby star, which is orbited by a planet detected with the radial velocity technique. In 2009, during my PhD in Jena, I observed this system with the lucky imaging instrument ASTRALUX at the Calar Alto observatory in southern Spain together with my then mentor Markus Mugrauer, and found that it has a faint, low-mass stellar companion (see the image with the white circle on the left). This was my first genuinely new discovery and I will never forget the excitement it brought. The original paper can be found here (click). In 2016, during one of the early SPHERE observation runs we returned to this system and found that the companion itself is a binary star, making this one of the rare stellar triple systems that host exoplanets (click). https://www.christian-ginski.com/disk-gallery daily 0.75 2025-08-30 https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/1597779700804-2UWF4V3AKZQZ6V6I6352/HD97048.png Disk Gallery https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/1597935226351-9DIEFBV7SKDFFM2PBVUH/HD135344B.png Disk Gallery https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/1597780837201-5Q3RKU4GEI3EHSK845K2/HD163296.png Disk Gallery https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/1597782620815-23MS3FI1MFHMDB3U6HL0/HD139614.png Disk Gallery https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/1597934832259-N7GTZNKPY47PX1K3N8IB/EM*SR21.png Disk Gallery 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https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/201d775f-b6ff-4937-83ee-7e266eb42bf4/PDS277.png Disk Gallery https://www.christian-ginski.com/videos daily 0.75 2025-08-27 https://www.christian-ginski.com/home daily 1.0 2025-08-30 https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/1597583896307-F4N5AJ9LXMX219A12HC9/ginski.jpg Home https://www.christian-ginski.com/home/northeast-rgt98 monthly 0.5 2025-08-30 https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/df120a6c-6b44-4d4d-93f5-454416a59bce/wispit2-K.png Home - WIde Separations Planets In Time survey Observations of the WISPIT 2 system with the SPHERE extreme adaptive optics imager at the ESO Very Large Telescope. The images are all showing the same data set taken in April of 2025 in the K-band (2.2 micron wavelength), but with different post-processing applied to remove the stellar light. The left panel uses a reference star for stellar light subtraction (RDI) and is the best representation of both disk and planet WISPIT 2b together. The middle panel uses angular differential imaging which highlights the planet WISPIT 2b but removes a lot of the disk signal. The right panel uses polarized light only, which removes the (unpolarized) planet signal but gives a good image of the disk. https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/659b8dba-c89a-433f-9a99-031a538a7ad3/wispit2-combined.jpg Home - WIde Separations Planets In Time survey Differently processed images of the WISPIT 2 disk + planet system. Left (adapted from ESO picture of the week): Combined H and K-band multi-color observations in polarized and total intensity light. Right: K-band RDI image (total intensity) image with a radius distance scaling from the central star applied to compensate for the drop-off in stellar illumination of the disk. For illustrative purposes the inset on the right panel shows an image of Jupiter. We think that WISPIT 2b looks similar to this. https://www.christian-ginski.com/home/tyc8998-760-1 monthly 0.5 2022-04-06 https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/1597679962435-Y2FX1816FKGKE5524REW/TYC8998-760-1bc_common_proper_motion.gif Home - Two planets orbiting the young sun TYC 8998-760-1 https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/1597680050430-ULG4VDHJNQUPJW74XC7V/TYC8998-760-1bc_color.gif Home - Two planets orbiting the young sun TYC 8998-760-1 https://www.christian-ginski.com/home/southeast-l3e5l monthly 0.5 2025-08-30 https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/de02dfd9-12b0-4711-bf09-c00b3314792c/2MASS1612PR.jpg Home - Signs of planet formation around 2MASS1612 https://www.christian-ginski.com/home/destinys monthly 0.5 2025-06-09 https://images.squarespace-cdn.com/content/v1/5f391ed00638305e03127bae/1597678800147-OLQLZKDIQS5BBHLQS6PC/destinys-1.png Home - Disk Evolution Study Through Imaging of Nearby Young Stars - DESTINYS The Disk Evolution Study Through Imaging of Nearby Young Stars is an ESO large program of which I am the principal investigator. The program started in the second half of 2019 and will target 85 T Tauri stars in all nearby (within 200 pc) star forming regions. Observations are carried out with the extreme adaptive optics instrument SPHERE at the ESO Very Large Telescope. The goals of the program are to detect the gas-rich circumstellar disks around the target stars for the first time in near-infrared scattered light, to link their appearance to key system parameters, such as the system age, and to search for embedded forming proto-planets. The near infrared appearance of disks depends a lot on their scale height and can vary significantly from what is seen in other wavelengths (for example, see the comparison of two systems imaged with SPHERE and ALMA on the left).