Results 41 to 50 of about 1,415 (101)

BD–22°3467, a DAO-type star exciting the nebula Abell 35 [PDF]

, 2012
Context. Spectral analyses of hot, compact stars with non-local thermodynamical equilibrium (NLTE) model-atmosphere techniques allow the precise determination of photospheric parameters such as the effective temperature (Teff), the surface gravity (log g)
M. Ziegler, T. Rauch, K. Werner, J. Koeppen, J. W. I. F. Astronomy, Astrophysics, K. C. F. Astro, P. Physics, E. University, Tuebingen, H Germany, O. Strasbourg, U. Strasbourg, Strasbourg, France., Nasa Goddard Space Flight Center, Greenbelt, Md, Usa   +18 more
semanticscholar   +1 more source

Internal kinematics of modelled interacting disc galaxies [PDF]

, 2006
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany-/-Abstract. We present an investigation of galaxy-galaxy interactions and their effects on the velocity fields of discgalaxies in combined N-body/hydrodynamic simulations,
T. Kronberger, W. Kapferer, S. Schindler, A. Boehm, E. Kutdemir, B. L. Z. I. F. Astro-, Particlephysics, Innsbruck, Austria, Institute for Computational Astrophysics, Goettingen, H Germany, A. Potsdam, Potsdam   +13 more
semanticscholar   +1 more source

Stellar laboratories: new Ge V and Ge VI oscillator strengths and their validation in the hot white dwarf RE 0503–289 [PDF]

, 2012
Context. State-of-the-art spectral analysis of hot stars by means of non-LTE model-atmosphere techniques has arrived at a high level of sophistication. The analysis of high-resolution and high-S/N spectra, however, is strongly restricted by the lack of ...
T. Rauch, K. Werner, É. Biémont, P. Quinet, J. W. I. F. Astronomy, Astrophysics, K. C. F. Astro, P. Physics, E. University, Tuebingen, H Germany, Astrophysique et Spectroscopie, Universit'e de Mons, Mons, Belgium, Ipnas, U. Liege, Sart Tilman, Liège, Nasa Goddard Space Flight Center, Greenbelt, Md, Usa   +22 more
semanticscholar   +1 more source

Direct determination of oxygen abundances in line-emitting star-forming galaxies at intermediate redshift [PDF]

, 2015
We present a sample of 22 blue ($(B-V)_{AB}
J. M. P'erez, C. Hoyos, 'Angeles I. D'iaz, D. Koo, Christopher N. Willmer Departamento de F'isica Te'orica. Unive Madrid, S. D. O. Astrophysics, U. Vienna, Austria. Astro-UAM, Uam, Unidad Asociada Csic, S. D. O. Astronomy, Lick Observatory, U. California, USA. Department of Astronomy, S. Observatory, U. Arizona, Usa   +16 more
semanticscholar   +1 more source

Non-LTE Spectral Analysis of Extremely Hot Post-AGB Stars: Constraints for Evolutionary Theory [PDF]

Proceedings of the International Astronomical Union, 2008
Spectral analysis by means of Non-LTE model-atmosphere techniques has arrived at a high level of sophistication: fully line-blanketed model atmospheres which consider opacities of all elements from H to Ni allow the reliable determination of photospheric
T. Rauch, K. Werner, M. Ziegler, L. Koesterke, J. W. I. F. Astronomy, Astrophysics, K. C. F. Astro, P. Physics, E. University, 1. Sand, Tubingen, H Germany, Texas Advanced Computer Center, U. Texas, Austin, Usa, D. Physics, Astronomy, J. University, Baltimore.   +19 more
semanticscholar   +1 more source

FUSE spectroscopy of the sdOB primary of the post common-envelope binary LB 3459 ( AA Doradus ) [PDF]

, 2008
Context. LB 3459 (AA Doradus) is an eclipsing, close, post common-envelope binary (PCEB) consisting of an sdOB primary star and an unseen secondary with an extraordinarily low mass (M2 ≈ 0.066 M ) – formally a brown dwarf.
Johannes Fleig, T. Rauch, K. Werner, J. W. I. F. Astronomy, Astrophysics, K. C. F. Astro, P. Physics, E. University, Tuebingen, H Germany, D. Physics, Astronomy, J. University, Baltimore., Md, U.S.A.   +15 more
semanticscholar   +1 more source

Dark matter density profiles: A comparison of nonextensive theory with N-body simulations [PDF]

, 2006
Density profiles of simulated galaxy cluster-sized dark matter haloes are analysed in the context of a recently introduced nonextensive theory of dark matter and gas density distributions.
T. Kronberger, M. Leubner, E. V. K. I. F. Astro-, Particlephysics, Innsbruck, Austria, Institute for Computational Astrophysics, Goettingen, H Germany   +8 more
semanticscholar   +1 more source

The virtual observatory service TheoSSA: Establishing a database of synthetic stellar flux standards - I. NLTE spectral analysis of the DA-type white dwarf G191−B2B [PDF]

, 2013
Hydrogen-rich, DA-type white dwarfs are particularly suited as primary standard stars for flux calibration. State-of-the-art NLTE models consider opacities of species up to trans-iron elements and provide reliable synthetic stellar-atmosphere spectra to ...
T. Rauch, R. Bohlin, J. Kruk, K. W. I. F. Astronomy, Astrophysics, K. C. F. Astro, P. Physics, E. University, Tuebingen, Germany, Space Telescope Science Institute, Baltimore, Md, Usa, Nasa Goddard Space Flight Center, Greenbelt   +15 more
semanticscholar   +1 more source

Close-up of primary and secondary asteroseismic CoRoT targets and the ground-based follow-up observations [PDF]

, 2007
To optimise the science results of the asteroseismic part of the CoRoT satellite mission a complementary simultaneous ground-based observational campaign is organised for selected CoRoT targets. The observations include both high-resolution spectroscopic
K. Uytterhoeven, E. Poretti, M. Rainer, L. Mantegazza, W. Zima, C. Aerts, T. Morel, A. Miglio, K. Lefever, P. Amado, S. Martín-Ruiz, P. Mathias, J. Valtier, M. Paparó, J. Benkő, the CoRoTSWG INAF-Brera, Instituut voor Sterrenkunde, Kuleuven, D. O. Astrophysics, U. Nijmegen, I. d'Astrophysique, ULg, I. D. A. D. Andalucia, Observatoire Gemini, K. Observatory   +24 more
semanticscholar   +1 more source

86th Annual Meeting of the Meteoritical Society (2024)

Meteoritics &Planetary Science, Volume 59, Issue S1, Page A1-A468, August 2024.
wiley   +1 more source