Search Publications
Comparative clustering analysis of variable stars in the Hipparcos, OGLE Large Magellanic Cloud, and CoRoT exoplanet databases
Sarro, L. M.; Aerts, C.; Debosscher, J. +1 more
Context: Discovery of new variability classes in large surveys using multivariate statistics techniques such as clustering, relies heavily on the correct understanding of the distribution of known classes as point processes in parameter space.
Aims: Our objective is to analyze the correspondence between the classical stellar variability types …
Radio continuum and near-infrared study of the MGRO J2019+37 region
Luque-Escamilla, P. L.; Paredes, J. M.; Romero, G. E. +10 more
Context:
Continuous monitoring of pulse period variations in Hercules X-1 using Swift/BAT
Klochkov, D.; Santangelo, A.; Staubert, R. +2 more
Context: Monitoring of pulse period variations in accreting binary pulsars is an important tool to study the interaction between the magnetosphere of the neutron star and the accretion disk. While the X-ray flux of the brightest X-ray pulsars have been successfully monitored over many years (e.g. with RXTE/ASM, CGRO/BATSE, Swift/BAT), the possibil…
Comparison of the sidereal angular velocity of subphotospheric layers and small bright coronal structures during the declining phase of solar cycle 23
Roth, M.; Corbard, T.; Wöhl, H. +2 more
Context: We compare solar differential rotation of subphotospheric layers derived from local helioseismology analysis of GONG++ dopplergrams and the one derived from tracing small bright coronal structures (SBCS) using EIT/SOHO images for the period August 2001-December 2006, which correspond to the declining phase of solar cycle 23.
Aims: The…
XMM-Newton and INTEGRAL analysis of the Ophiuchus cluster of galaxies
Eckert, D.; Kaastra, J.; Bonamente, M. +2 more
Aims. We investigated the non-thermal hard X-ray emission in the Ophiuchus cluster of galaxies. Our aim is to characterise the physical properties of the non-thermal component and its interaction with the cosmic microwave background.
Methods: We performed spatially resolved spectroscopy and imaging using XMM-Newton data to model the thermal em…
Uncovering strong MgII absorbing galaxies. Imaging below the Lyman limit
Fynbo, J. P. U.; Christensen, L.; Petitjean, P. +2 more
Context: The nature of the galaxies that give rise to absorption lines, such as damped Lyman-α systems (DLAs) or strong Mg ii lines, in quasar spectra is difficult to investigate in emission. These galaxies can be very faint and located close to the lines of sight of the much brighter background quasars.
Aims: Taking advantage of the total abs…
Abundances in the planetary nebula NGC 6210
Pottasch, S. R.; Bernard-Salas, J.; Roellig, T. L.
The spectra of the planetary nebula
Multi-wavelength fine structure and mass flows in solar microflares
Veronig, A. M.; Sütterlin, P.; Rybák, J. +2 more
Aims: We study the multi-wavelength characteristics at high spatial resolution, as well as chromospheric evaporation signatures of solar microflares. To this end, we analyze the fine structure and mass flow dynamics in the chromosphere, transition region and corona of three homologous microflares (GOES class <A9/0.7 with/without background), wh…
Evolution of the optical Tully-Fisher relation up to z = 1.3
Castañeda, H.; Cepa, J.; Bongiovanni, A. +5 more
Context: The study of the evolution of the Tully-Fisher relation has been controversial in the past years. The main difficulty is in determining the required parameters for intermediate and high redshift galaxies, given the cosmological corrections and biases involved.
Aims: This work aims to identify the main problems of the study of the Tull…
Star formation history of Canis Major R1. I. Wide-Field X-ray study of the young stellar population
Preibisch, T.; Zinnecker, H.; Rodrigues, C. V. +3 more
Aims: The CMa R1 star-forming region contains several compact clusters as well as many young early-B stars. It is associated with a well-known bright rimmed nebula, the nature of which is unclear (fossil HII region or supernova remnant). To help elucidate the nature of the nebula, our goal was to reconstruct the star-formation history of the CMa R…