From the 1 of 2.4k papers with an AI index.
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- Centre National de la Recherche ScientifiqueFR733 papers
- Ludwig-Maximilians-Universität MünchenDE651 papers
- Heidelberg UniversityDE647 papers
- Brookhaven National LaboratoryUS642 papers
- University of OklahomaUS633 papers
- Aix-Marseille UniversitéFR621 papers
- Northern Illinois UniversityUS610 papers
- University of ManchesterGB607 papers
- University of Science and Technology of ChinaCN604 papers
- Université Paris CitéFR593 papers
- Johannes Gutenberg University MainzDE591 papers
- Charles UniversityCZ589 papers
15 papers · 2 filters
Optimising Optimal Image Subtraction
Holger Israel, Frederic V. Hessman, Sonja Schuh
Difference imaging is a technique for obtaining precise relative photometry of variable sources in crowded stellar fields and, as such, constitutes a crucial part of the data reduc…
Barnes-Evans relations for dwarfs with an application to the determination of distances to cataclysmic variables
K. Beuermann
Barnes-Evans type relations provide an empirical relationship between the surface brightness of stars and their color. They are widely used for measuring the distances to stars of…
Hot subdwarfs from the ESO Supernova Ia Progenitor Survey: II. Atmospheric parameters of subdwarf O stars
A. Stroeer, U. Heber, T. Lisker +4
We address the origin and evolutionary status of hot subdwarf stars by studying the optical spectral properties of 58 subdwarf O (sdO) stars. Combining them with the results of our…
New southern blue compact dwarf galaxies in the 2dF Galaxy Redshift Survey
P. Papaderos, N. G. Guseva, Y. I. Izotov +3
Aiming to find new extremely metal-deficient star-forming galaxies we extracted from the Two-Degree Field Galaxy Redshift Survey (2dFGRS) 100K Data Release 14 emission-line galaxie…
The secondary star and distance of the polar V1309 Ori
K. Reinsch, Y. Kim, K. Beuermann
The first phase-resolved JHK light curves of the eclipsing polar (AM Herculis binary) V1309 Ori are presented and interpreted. We separate the contributions from the secondary star…
Spectral analyses of eighteen hot H-deficient (pre-) white dwarfs from the Sloan Digital Sky Survey Data Release 4
S. D. Huegelmeyer, S. Dreizler, D. Homeier +4
Context: The Sloan Digital Sky Survey Data Release 4 has provided spectra of several new PG 1159 stars and DO white dwarfs. This increase in known hot H-deficient compact objects s…