Hamburger Sternwarte

Stefan Czesla

Address and contact

Telefon: +49 40 42838 8577
Telefax: +49 40 42838 8598
e-mail : stefan.czesla@hs.uni-hamburg.de

Current fields of work

• Stellar magnetic activity - analysis of optical and X-ray spectra,
• analysis of fluorescent lines observed from stellar X-ray sources,
• application of Markov-Chain Monte-Carlo algorithms in surface reconstruction techniques.

Vorlesungen

Publications

1. The high-energy environment in the super-earth system CoRoT-7
   Poppenhaeger, K.; Czesla, S.; Schröter, S.; Lalitha, S.; Kashyap, V.; Schmitt, J. H. M. M.
   
   
2. The extended chromosphere of CoRoT-2A. Discovery and analysis of the chromospheric Rossiter-McLaughlin effect
   Czesla, S.; Schröter, S.; Wolter, U.; von Essen, C.; Huber, K. F.; Schmitt, J. H. M. M.; Reichart, D. E.; Moore, J. P.
   
   
3. The corona and companion of CoRoT-2a. Insights from X-rays and optical spectroscopy
   Schröter, S.; Czesla, S.; Wolter, U.; Müller, H. M.; Huber, K. F.; Schmitt, J. H. M. M.
   
   
4. Puzzling fluorescent emission from Orion
   Czesla, S.; Schmitt, J. H. M. M.
   
   
5. Planetary eclipse mapping of CoRoT-2a. Evolution, differential rotation, and spot migration
   Huber, K. F.; Czesla, S.; Wolter, U.; Schmitt, J. H. M. M.
   
   
6. A planetary eclipse map of CoRoT-2a. Comprehensive lightcurve modeling combining rotational-modulation and transits
   Huber, K. F.; Czesla, S.; Wolter, U.; Schmitt, J. H. M. M.
   
   
7. How stellar activity affects the size estimates of extrasolar planets
   Czesla, S.; Huber, K. F.; Wolter, U.; Schr�ter, S.; Schmitt, J. H. M. M.
   
   
8. Transit mapping of a starspot on CoRoT-2. Probing a stellar surface with planetary transits
   Wolter, U.; Schmitt, J. H. M. M.; Huber, K. F.; Czesla, S.; Müller, H. M.; Guenther, E. W.; Hatzes, A. P.
   
   
9. Discovery of X-ray emission from the eclipsing brown-dwarf binary 2MASS J05352184-0546085
   Czesla, S.; Schneider, P. C.; Schmitt, J. H. M. M.
   
   
10. The nature of the fluorescent iron line in V 1486 Orionis
    Czesla, S.; Schmitt, J. H. M. M.
    
    
11. Are magnetic hot stars intrinsic X-ray sources?
    Czesla, S.; Schmitt, J. H. M. M.
    
    

Publications (with minor contributions)

1. Discovery of X-ray flaring activity in the Arches cluster
   Capelli, R.; Warwick, R. S.; Cappelluti, N.; Gillessen, S.; Predehl, P.; Porquet, D.; Czesla, S.
   
   
2. Detecting Planets Around Very Low Mass Stars with the Radial Velocity Method
   Reiners, A.; Bean, J. L.; Huber, K. F.; Dreizler, S.; Seifahrt, A.; Czesla, S.
   
   
3. Magnetic activity in early-type stars?
   Schmitt, J. H. M. M.; Groote, D.; Czesla, S.
   
   

PyAstronomy

A collection of useful astronomy related routines in Python