Výsledky vyhledávání - "Willemsen, Philip"

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Comparing CN and CH Line Strengths in a Homogeneous Spectroscopic Sample of 8 Galactic Globular Clusters

Autor: Kayser, Andrea, Hilker, Michael, Grebel, Eva K., Willemsen, Philip G.

Our work focuses on the understanding of the origin of CNO-anomalies, which have been detected in several Galactic globular clusters (GCs). This study is based on a homogeneous data set of hundreds of medium resolution spectra of stars in eight GCs.

Externí odkaz: http://arxiv.org/abs/0805.1067

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Medium resolution spectroscopy in Omega Centauri: abundances of 400 subgiant and turn-off region

Autor: Kayser, Andrea, Hilker, Michael, Richtler, Tom, Willemsen, Philip G.

Publikováno v: Astron.Astrophys. 458 (2006) 777-788

Medium resolution spectra of more than 400 subgiant and turn-off region stars in Omega Centauri were analysed. The observations were performed at the VLT/Paranal with FORS2/MXU. In order to determine the metallicities of the sample stars, we defined

Externí odkaz: http://arxiv.org/abs/astro-ph/0611286

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The extended star formation history of omega Centauri

Autor: Hilker, Michael, Kayser, Andrea, Richtler, Tom, Willemsen, Philip

Publikováno v: Astron.Astrophys. 422 (2004) L9-L12

For the first time, the abundances of a large sample of subgiant and turn-off region stars in omega Centauri have been measured, the data base being medium resolution spectroscopy from FORS2 at the VLT. Absolute iron abundances were derived for about

Externí odkaz: http://arxiv.org/abs/astro-ph/0406017

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Biomass system calibration and verification by mean of an active polarimetric transponder

Autor: Leanza, Antonio, Willemsen, Philip, Scipal, Klaus, Rommen, Björn, Klenk, Patrick

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______1640::4d04f259f6428a8114b119da1127b6d2
https://elib.dlr.de/146340/

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PROBA-V: AN OPERATIONAL AND TECHNOLOGY DEMONSTRATION MISSION – RESULTS AFTER COMMISSIONING AND ONE YEAR OF IN-ORBIT EXPLOITATION

Autor: Mellab, Karim, Santandrea, Stefano, Francois, Michael, Vrancken, Davy, Gerrits, Dennis, Barnes, Andrew, Nieminen, Petteri, Willemsen, Philip, Hernandez, Stephan, Owens, Alan, Delovski, Toni, Cyamukungu, Mathias, Granja, Carlos

Proba-V, the third mission of ESA’s Programme for In-orbit Technology Demonstration (IOD), conceived and developed following the footsteps of its predecessors, Proba-1 and Proba-2, is an operational mission based on a small, high performance satell

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______1640::f29bafcc6c90bf12a767079c8f689403
https://elib.dlr.de/106320/

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