Search Publications
The Herschel Virgo Cluster Survey. XIII. Dust in early-type galaxies
Bianchi, S.; Fritz, J.; De Looze, I. +16 more
Aims: We study the dust content of a large optical input sample of 910 early-type galaxies (ETG) in the Virgo cluster, also extending to the dwarf ETG, and examine the results in relation to those on the other cold ISM components.
Methods: We have searched for far-infrared emission in all galaxies in the input sample using the 250 µ…
Low frequency follow up of radio haloes and relics in the GMRT Radio Halo Cluster Survey
Brunetti, G.; Giacintucci, S.; Venturi, T. +4 more
Aims: To gain insight into the origin of diffuse radio sources in galaxy clusters and their connection with cluster merger processes, we performed GMRT low frequency observations of the radio haloes, relics and new candidates belonging to the GMRT radio Halo cluster sample first observed at 610 MHz. Our main aim was to investigate their obser…
The extended ROSAT-ESO flux limited X-ray galaxy cluster survey (REFLEX II) II. Construction and properties of the survey
Böhringer, H.; Nowak, N.; Chon, G. +3 more
Context. Galaxy clusters provide unique laboratories to study astrophysical processes on large scales and are important probes for cosmology. X-ray observations are currently the best means of detecting and characterizing galaxy clusters. Therefore X-ray surveys for galaxy clusters are one of the best ways to obtain a statistical census of the gal…
Deep observations of O2 toward a low-mass protostar with Herschel-HIFI
Caselli, Paola; van Dishoeck, Ewine F.; Visser, Ruud +13 more
Context. According to traditional gas-phase chemical models, O2 should be abundant in molecular clouds, but until recently, attempts to detect interstellar O2 line emission with ground- and space-based observatories have failed.
Aims: Following the multi-line detections of O2 with low abundances in the Orion a…
Analysis of far-UV data of central stars of planetary nebulae: Occurrence and variability of stellar winds
Guerrero, M. A.; De Marco, O.
The occurrence of stellar wind in the central star of a planetary nebula (CSPN) can be revealed by the presence of P Cygni profiles of high-excitation lines overimposed on its stellar continuum. We examined the entire Far-Ultraviolet Spectroscopic Explorer (FUSE) archive and merged all useful spectroscopic observations of CSPNe to produce the high…
Water in star-forming regions with Herschel (WISH). IV. A survey of low-J H2O line profiles toward high-mass protostars
Liseau, R.; van Dishoeck, E. F.; Bergin, E. A. +12 more
Context. Water is a key constituent of star-forming matter, but the origin of its line emission and absorption during high-mass star formation is not well understood.
Aims: We study the velocity profiles of low-excitation H2O lines toward 19 high-mass star-forming regions and search for trends with luminosity, mass, and evolutionar…
Herschel observations of the Sagittarius B2 cores: Hydrides, warm CO, and cold dust
Wu, R.; Bally, J.; Cernicharo, J. +6 more
Context. Sagittarius B2 is one of the most massive and luminous star-forming regions in the Galaxy and shows a very rich chemistry and physical conditions similar to those in much more distant extragalactic starbursts.
Aims: We present large-scale far-infrared/submillimeter photometric images and broadband spectroscopic maps taken with the PA…
Planck intermediate results. VII. Statistical properties of infrared and radio extragalactic sources from the Planck Early Release Compact Source Catalogue at frequencies between 100 and 857 GHz
Kneissl, R.; Bernard, J. -P.; Planck Collaboration +188 more
We make use of the Planck all-sky survey to derive number counts and spectral indices of extragalactic sources - infrared and radio sources - from the Planck Early Release Compact Source Catalogue (ERCSC) at 100 to 857 GHz (3 mm to 350 µm). Three zones (deep, medium and shallow) of approximately homogeneous coverage are used to permit a clea…
Chemical enrichment and physical conditions in I Zw 18
Kunth, D.; Lebouteiller, V.; Hubeny, I. +1 more
Context. Low-metallicity star-forming dwarf galaxies are prime targets to understand the chemical enrichment of the interstellar medium. The H i region contains the bulk of the mass in blue compact dwarfs, and it provides important constraints on the dispersal and mixing of heavy elements released by successive star-formation episodes. The metalli…
CLASH-VLT: spectroscopic confirmation of a z = 6.11 quintuply lensed galaxy in the Frontier Fields cluster RXC J2248.7-4431
Infante, L.; Zheng, W.; Molino, A. +41 more
We present VIsible Multi-Object Spectrograph (VIMOS) observations of a galaxy quintuply imaged by the Frontier Fields galaxy cluster RXC J2248.7-4431 . This sub-, high- galaxy has been recently discovered by Monna et al. (2013) using dropout techniques with the 16-band HST photometry acquired as part of the Cluster Lensing And Supernova survey wit…