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- D. Gruen2 profiles59 · h 87
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- Valongo ObservatoryBR382 papers
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16 papers · 1 filter
Galaxy clusters and groups in the ALHAMBRA Survey
Begoña Ascaso, Narciso Benítez, Alberto Fernández-Soto +35
We present a catalogue of 348 galaxy clusters and groups with selected in the 2.78 ALHAMBRA Survey. The high precision of our photometric redshifts, close to $1…
Results of two multi-chord stellar occultations by dwarf planet (1) Ceres
A. R. Gomes-Júnior, B. L. Giacchini, F. Braga-Ribas +24
We report the results of two multi-chord stellar occultations by the dwarf planet (1) Ceres that were observed from Brazil on 2010 August 17, and from the USA on 2013 October 25. F…
An infrared diagnostic for magnetism in hot stars
M. E. Oksala, J. H. Grunhut, M. Kraus +5
Magnetospheric observational proxies are used for indirect detection of magnetic fields in hot stars in the X-ray, UV, optical, and radio wavelength ranges. To determine the viabil…
Young [/Fe]-enhanced stars discovered by CoRoT and APOGEE: What is their origin?
C. Chiappini, F. Anders, T. S. Rodrigues +34
We report the discovery of a group of apparently young CoRoT red-giant stars exhibiting enhanced [alpha/Fe] abundance ratios (as determined from APOGEE spectra) with respect to Sol…
A derivation of masses and total luminosities of galaxy groups and clusters in the maxBCG catalogue
Robert N. Proctor, Claudia Mendes de Oliveira, Luiz Azanha +2
We report the results of a multi-waveband analysis of the masses and luminosities of 600 galaxy groups and clusters identified in the maxBCG catalogue. These data are intende…
Accurate photometric redshift probability density estimation - method comparison and application
Markus Michael Rau, Stella Seitz, Fabrice Brimioulle +4
We introduce an ordinal classification algorithm for photometric redshift estimation, which significantly improves the reconstruction of photometric redshift probability density fu…