Results 61 to 70 of about 448,852 (155)

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, C. 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

Strangeness in Astrophysics and Cosmology

, 2010
Some recent developments concerning the role of strange quark matter for astrophysical systems and the QCD phase transition in the early universe are addressed.
Aichelin J, Alford M G, Andersson N, B Sa'd, Bauswein A Oechslin R Janka H T, Blaschke D, Boeckel T Schaffner-Bielich J, Caprini C, Freire P C C, G Pagliara, Huber S J, I Sagert, J Schaffner-Bielich, Kalogera V, Lorimer D R, M Hempel, Mintz B I, Mintz B W Fraga E Pagliara G Schaffner-Bielich J, Pagliara G, Sa'd B A, Sa'd B A Schaffner-Bielich J, Sagert I, Sagert I, Sagert I Wietoska M Schaffner-Bielich J Sturm C, T Boeckel   +24 more
core   +3 more sources

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

Dynamic Screening and Thermonuclear Reaction Rates [PDF]

Astrophys.J. 496 (1998) 503, 1997
We show that there are no dynamic screening corrections to the Salpeter's enhancement factor in the weak-screening limit.
arxiv   +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

Minimal Dark Matter predictions for galactic positrons, anti-protons, photons

, 2008
We present the energy spectra of the fluxes of positrons, anti-protons and photons generated by Dark Matter annihilations in our galaxy, as univocally predicted by the model of Minimal Dark Matter.
Aguilar, Aguilar, Aguilar, Alessandro Strumia, Alwall, Asaoka, Bahcall, Baltz, Barger, Barrau, Barwick, Berezinsky, Bergstrom, Bergstrom, Boezio, Boezio, Boezio, Bottino, Bringmann, Bringmann, Brun, Brun, Chang, Chardonnet, Cirelli, Cirelli, Cirelli, Delahaye, Diemand, Donato, Donato, Ellis, Finkbeiner, Ginzburg, Gleeson, Gleeson, Grimani, Gunn, Hisano, Hisano, Hisano, Hisano, Hisano, Hisano, Hooper, Kamionkowski, Lavalle, Lavalle, Mack, Maeno, Maltoni, Marco Cirelli, Maurin, Maurin, Moskalenko, Navarro, Orito, Picozza, Roberto Franceschini, Silk, Sjöstrand, Spergel, Stecker, Stelzer, Tan, Tegmark, Webber, Zeldovich   +67 more
core   +2 more sources

Primordial Nucleosynthesis with CMB Inputs: Probing the Early Universe and Light Element Astrophysics [PDF]

, 2001
Cosmic microwave background (CMB) determinations of the baryon-to-photon ratio $\eta \propto \Omega_{\rm baryon} h^2$ will remove the last free parameter from (standard) big bang nucleosynthesis (BBN) calculations. This will make BBN a much sharper probe
Balbi, Barriga, Bartlett, Birkel, Bond, Bonifacio, Brian D. Fields, Burles, Cardall, Copi, Cyburt, de Bernardis, Ellis, Epstein, Fields, Fields, Fiorentini, Groom, Hannestad, Hata, Izotov, Jaffe, Jedamzik, Jungman, Jungman, Kaplinghat, Keith A. Olive, Kernan, Kurki-Suonio, Lisi, Malaney, O'Meara, Olive, Olive, Olive, Olive, Padin, Peimbert, Richard H. Cyburt, Ryan, Ryan, Sarkar, Scherrer, Schneider, Schramm, Steigman, Tegmark, Walker, Zaldarriaga   +48 more
core   +3 more sources

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, Department of Astronomy Astrophysics, U. Nijmegen, I. d'Astrophysique, ULg, I. D. A. D. Andalucia, Observatoire Gemini, K. Observatory   +24 more
semanticscholar   +1 more source