8 papers · 1 filter
Convectively driven vortex flows in the Sun
J. A. Bonet, I. Marquez, J. Sanchez Almeida +2
We have discovered small whirlpools in the Sun, with a size similar to the terrestrial hurricanes (<~0.5 Mm). The theory of solar convection predicts them, but they had remained el…
Structure and dynamics of galaxies with a low surface brightness disc. I. The stellar and ionised-gas kinematics
A. Pizzella, E. M. Corsini, M. Sarzi +5
(abridged) Photometry and long-slit spectroscopy are presented for a sample of 6 galaxies with a low surface brightness stellar disc and a bulge. The stellar and ionised-gas kinema…
Metallicity distribution of red giants in the Inner Galaxy from Near Infrared spectra
C. González-Fernández, A. Cabrera-Lavers, P. L. Hammersley +1
In this paper, we present low resolution (R=500) near-infrared spectra for selected and serendipitous sources in six inner in-plane Galactic fields, with the aim of analysing the s…
A detailed study of the enigmatic cluster M82F
N. Bastian, I. Konstantopoulos, L. J. Smith +3
We present a detailed study of the stellar cluster M82F, using multi-band high resolution HST imaging and deep ground based optical slit and integral field spectroscopy. Using the…
The 2005 outburst of the halo black hole X-ray transient XTE J1118+480
C. Zurita, M. A. P. Torres, D. Steeghs +15
We present optical and infrared monitoring of the 2005 outburst of the halo black hole X-ray transient XTE J1118+480. We measured a total outburst amplitude of ~5.7+-0.1 mag in the…
High-resolution proper motions in a sunspot penumbra
I. Marquez, J. Sanchez Almeida, J. A. Bonet
Local correlation tracking techniques are used to measure proper motions in a series of high angular resolution (~0.1 arcsec) penumbra images. If these motions trace true plasma mo…