Search Publications
MCAO near-IR photometry of the globular cluster NGC 6388: MAD observations in crowded fields
Moretti, A.; Falomo, R.; Anderson, J. +15 more
Context: Deep photometry of crowded fields, such as Galactic globular clusters, is severely limited by the resolution of ground-based telescopes. On the other hand, the Hubble Space Telescope does not have the near-infrared (NIR) filters needed to allow large color baselines.
Aims: In this work we demonstrate how ground based observations can …
Propagating transverse waves in soft X-ray coronal jets
Nakariakov, V. M.; Verwichte, E.; Van Doorsselaere, T. +1 more
Aims: The theoretical model for magnetohydrodynamic (MHD) modes guided by a field-aligned plasma cylinder with a steady flow is adapted to interpret transverse waves observed in solar coronal hot jets, discovered with Hinode/XRT in terms of fast magnetoacoustic kink modes.
Methods: Dispersion relations for linear magnetoacoustic perturbations …
Multi-frequency imaging of the galaxy cluster Abell 2163 using the Sunyaev-Zel'dovich effect
Kneissl, R.; Menten, K. M.; Ade, P. A. R. +30 more
Context: Observations of the Sunyaev-Zel'dovich effect (SZE) from galaxy clusters are emerging as a powerful tool in cosmology. Besides large cluster surveys, resolved SZE images of individual clusters can shed light on the physics of the intra-cluster medium (ICM) and allow accurate measurements of the cluster gas and total masses.
Aims: We u…
Properties of M31 . I. Dust. Basic properties and a discussion about age-dependent dust heating
Montalto, M.; Seitz, S.; Lee, C. -H. +3 more
Aims: Observations acquired by the Spitzer Space Telescope and improvements to theoretical modeling of dust emission properties are used to discuss the distribution of dust and its characteristics in the closest neighbor spiral galaxy
Morphology and density structure of post-CME current sheets
Webb, D. F.; Raymond, J. C.; Vršnak, B. +11 more
Context: Eruption of a coronal mass ejection (CME) drags and “opens” the coronal magnetic field, presumably leading to the formation of a large-scale current sheet and field relaxation by magnetic reconnection.
Aims: We analyze the physical characteristics of ray-like coronal features formed in the aftermath of CMEs, to confirm whether interpr…
Frequency and properties of bars in cluster and field galaxies at intermediate redshifts
Jogee, S.; Pelló, R.; White, S. D. M. +15 more
We present a study of large-scale bars in field and cluster environments out to redshifts of ~0.8 using a final sample of 945 moderately inclined disk galaxies drawn from the EDisCS project. We characterize bars and their host galaxies and look for relations between the presence of a bar and the properties of the underlying disk. We investigate wh…
PMAS optical integral field spectroscopy of luminous infrared galaxies. I. The atlas
Colina, L.; Monreal-Ibero, A.; Arribas, S. +4 more
Context: Luminous and ultraluminous infrared galaxies (LIRGs and ULIRGs) are key cosmological classes since they account for most of the co-moving star formation rate density at z ∼ 1-2. It is then important to have detailed studies of local samples of their counterparts for understanding the internal and dynamical processes taking place at high-z…
Temporal comparison of nonthermal flare emission and magnetic-flux change rates
Veronig, A. M.; Vršnak, B.; Miklenic, C. H.
Context: To understand the mechanisms that trigger solar flares, we require models describing and quantifying observable responses to the original energy release process, since the coronal energy release site itself cannot be resolved with current technical equipment. Testing the usefulness of a particular model requires the comparison of its pred…
The zCOSMOS redshift survey: the three-dimensional classification cube and bimodality in galaxy physical properties
Kneib, J. -P.; Maccagni, D.; Cimatti, A. +56 more
Aims: We investigate the relationships between three main optical galaxy observables (spectral properties, colors, and morphology), exploiting the data set provided by the COSMOS/zCOSMOS survey. The purpose of this paper is to define a simple galaxy classification cube, with a carefully selected sample of ≈1000 galaxies.
Methods: Using medium …
Stray light correction and contrast analysis of Hinode broad-band images
Solanki, S. K.; Zakharov, V.; Mathew, S. K.
The contrasts of features in the quiet Sun are studied using filtergrams recorded by the broad-band filter imager mounted on the Hinode/Solar Optical Telescope. In a first step, the scattered light originating in the instrument is modeled using Mercury transit data. Combinations of four two-dimensional Gaussians with different widths and weights w…