Search Publications
The star cluster population of the spiral galaxy NGC 3370
Blakeslee, J. P.; Cantiello, M.; Brocato, E.
Aims: We study the photometric and structural properties of the star cluster system in the late type Sc spiral
Methods: BVI observations from the Advanced Camera for Surveys on board of HST are used to analyse in detail the colours, magnitudes and spatial properties of cluster candidates. The final catalogue of sou…
R-matrix electron-impact excitation data for B-like Si and its application in cool stars
Badnell, N. R.; Liang, G. Y.; Whiteford, A. D.
We present the results of an intermediate coupling frame-transformation R-matrix calculation for the electron-impact excitation of Si9+. The target and close-coupling expansions are both taken to be the 125 fine-structure levels (58 LS terms) belonging to the configurations 2sx2py (x+y = 3) and 2sα2p
On the nature of the extragalactic number counts in the K-band
Pelló, R.; Pérez-González, P. G.; Guzmán, R. +10 more
Context: The galaxy number counts has been traditionally used to test models of galaxy evolution. However, the origin of significant differences in the shape of number counts at different wavelengths is still unclear. By relating the most remarkable features in the number counts with the underlying galaxy population it is possible to introduce fur…
Near-IR search for lensed supernovae behind galaxy clusters. I. Observations and transient detection efficiency
Lidman, C.; Amanullah, R.; Goobar, A. +11 more
Context: Massive galaxy clusters at intermediate redshift can magnify the flux of distant background sources by several magnitudes.
Aims: We exploit this effect to search for lensed distant supernovae that may otherwise be too faint to be detected.
Methods: A supernova search was conducted at near infrared wavelengths using the ISAAC instr…
Physical properties of amorphous solid interstellar material from X-ray absorption spectroscopy of Scorpius X-1
Costantini, E.; de Vries, C. P.
High-quality, high-resolution X-ray spectra were obtained of
COSMOS 5921+0638: characterization and analysis of a new strong gravitationally lensed AGN
Kneib, J. -P.; Koekemoer, A. M.; Faure, C. +4 more
Context: Strong lens candidates have been newly identified within the COSMOS field. We present VLT/FORS1 spectroscopic follow-up observations and HST/WFPC2 imaging of the system COSMOS 5921+0638, which exhibits quadruply lensed images and a perfect Einstein ring.
Aims: We investigate the nature of COSMOS 5921+0638 by studying its photometric, …
Suzaku observation of IGR J16318-4848
Nowak, M. A.; Tomsick, J. A.; Walter, R. +4 more
We report on the first <sl>Suzaku</sl> observation of IGR J16318-4848, the most extreme example of a new group of highly absorbed X-ray binaries that have recently been discovered by the International Gamma-Ray Astrophysics Laboratory (<sl>INTEGRAL</sl>). The <sl>Suzaku</sl> observation was carried out between 2…
The correlation of fractal structures in the photospheric and the coronal magnetic field
Moussas, X.; Anastasiadis, A.; Georgoulis, M. +4 more
Context: This work examines the relation between the fractal properties of the photospheric magnetic patterns and those of the coronal magnetic fields in solar active regions.
Aims: We investigate whether there is any correlation between the fractal dimensions of the photospheric structures and the magnetic discontinuities formed in the corona…
The nature of the X-ray binary IGR J19294+1816 from INTEGRAL, RXTE, and Swift observations
Chaty, S.; Tomsick, J. A.; Rodriguez, J. +4 more
We report the results of a high-energy multi-instrumental campaign with INTEGRAL, RXTE, and Swift of the recently discovered INTEGRAL source IGR J19294+1816. The Swift/XRT data allow us to refine the position of the source to {RA}J2000 = 19h 29m 55.9s {Dec}J2000 = +18° 18 arcmin38.4 arcsec (±3…
Distribution of jets and magnetic fields in a coronal hole
Curdt, W.; Hara, H.; Watanabe, T. +1 more
Context: Recent observations of ubiquitous jets in coronal holes suggest that they play an important role in coronal heating and solar wind acceleration.
Aims: The aim of our study is to understand the magnetic connectivity and the formation of jets in coronal holes. The study of jets also helps to understand the magnetic field configuration i…