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276 papers · 1 filter
The intrinsic shape of bulges
J. Mendez-Abreu, E. Simonneau, J. A. L. Aguerri +1
The structural parameters of a magnitude-limited sample of 148 unbarred S0-Sb galaxies were derived using the GASP2D algorithm and then analyzed to derive the intrinsic shape of th…
Calderón-Zygmund operators in the Bessel setting
Jorge J. Betancor, Alejandro J. Castro, Adam Nowak
We study several fundamental operators in harmonic analysis related to Bessel operators, including maximal operators related to heat and Poisson semigroups, Littlewood-Paley-Stein…
HerMES: SPIRE/Sub-millimetre Emission from Radio Selected AGN
N. Seymour, M. Symeonidis, M. Page +1
We examine the rest-frame far-infrared emission from powerful radio sources with 1.4GHz luminosity densities of 25<=log(L_1.4/WHz^-1)<=26.5 in the extragalactic Spitzer First Look…
Are short-term variations in solar oscillation frequencies the signature of a second solar dynamo?
Anne-Marie Broomhall, Stephen T. Fletcher, David Salabert +6
In addition to the well-known 11-year solar cycle, the Sun's magnetic activity also shows significant variation on shorter time scales, e.g. between one and two years. We observe a…
Measuring Be depletion in cool stars with exoplanets
Elisa Delgado Mena, Garik Israelian, Jonay I. González Hernández +2
We present new UVES spectra of a sample of 14 mostly cool unevolved stars with planetary companions with the aim of studying possible differences in Be abundance with respect to st…
Mesogranulation and the solar surface magnetic field distribution
L. Yelles Chaouche, F. Moreno-Insertis, V. Martínez Pillet +9
The relation of the solar surface magnetic field with mesogranular cells is studied using high spatial (~ 100 km) and temporal (~ 30 sec) resolution data obtained with the IMaX ins…