We present measurements of internal proper motions at more than 500 positions of NGC 2392, the Eskimo Nebula, based on images acquired with WFPC2 on board the...
We present internal proper motion measurements of more than five hundred positions of NGC 2392, based on images acquired with the WFPC2 on bord of the Hubble...
Intracluster light in the Virgo cluster: large scale distribution
Aims: The intracluster light (ICL) is a faint diffuse stellar component of clusters made of stars that are not bound to individual galaxies. We have carried out...
Intracluster Planetary Nebulae in Virgo: Photometric Selection, Spectroscopic Validation, and Cluster Depth
We have imaged an empty area of 34×34 arcmin2 1.5d north of the Virgo Cluster core to survey for intracluster planetary nebula (PN) candidates. We have...
We have investigated the properties of the diffuse light in the Virgo Cluster core region, based on the detection of intracluster planetary nebulae (PNs) in...
Intracluster Stellar Population Properties from N-Body Cosmological Simulations. I. Constraints at z = 0
We use a high-resolution collisionless simulation of a Virgo-like cluster in a ΛCDM cosmology to determine the velocity and clustering properties of the diffuse...
Ionization correction factors for sodium, potassium, and calcium in planetary nebulae
We use a large grid of photoionization models that are representative of observed planetary nebulae (PNe) to derive ionization correction factors (ICFs) for...
IPHAS and the symbiotic stars. I. Selection method and first discoveries
Context: The study of symbiotic stars is essential to understand important aspects of stellar evolution in interacting binaries. Their observed population in...
IPHAS and the symbiotic stars. III. New discoveries and their IR spectral energy distributions
Context. The IPHAS Hα survey provides a rich database to search for emission-line sources in the northern Galactic plane. Aims: We are systematically searching...