Search Publications
The first X-ray survey of Galactic luminous blue variables
Nazé, Y.; Rauw, G.; Hutsemékers, D.
Aims: The X-ray emission of massive stars has been studied when these objects are in their main-sequence phase, as well as when they are in their Wolf-Rayet phase. However, the X-ray properties of the transitional luminous blue variable (LBV) phase remain unknown.
Methods: Using a dedicated but limited XMM-Newton survey and archival XMM-…
Herschel observations of a potential core-forming clump: Perseus B1-E
Bernard, J. -P.; Hill, T.; White, G. J. +17 more
We present continuum observations of the Perseus B1-E region from the Herschel Gould Belt Survey. These Herschel data reveal a loose grouping of substructures at 160-500 µm not seen in previous submillimetre observations. We measure temperature and column density from these data and select the nine densest and coolest substructures for follo…
Densities and temperatures in the Venus mesosphere and lower thermosphere retrieved from SOIR on board Venus Express: Carbon dioxide measurements at the Venus terminator
Vandaele, A. C.; Robert, S.; Montmessin, F. +4 more
SOIR is a high-resolution spectrometer flying on board the ESA Venus Express mission. It performs solar occultations of the Venus high atmosphere, and so defines unique vertical profiles of many of the Venus key species. In this paper, we focus on the Venus main constituent, carbon dioxide. We explain how the temperature, the total density, and th…
Detection of the Second r-process Peak Element Tellurium in Metal-poor Stars
Beers, Timothy C.; Roederer, Ian U.; Frebel, Anna +6 more
Using near-ultraviolet spectra obtained with the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope, we detect neutral tellurium in three metal-poor stars enriched by products of r-process nucleosynthesis, BD +17 3248, HD 108317, and HD 128279. Tellurium (Te, Z = 52) is found at the second r-process peak (A ≈ 130) associated …
The Herschel and IRAM CHESS Spectral Surveys of the Protostellar Shock L1157-B1: Fossil Deuteration
Codella, C.; Ceccarelli, C.; Caselli, P. +9 more
We present the first study of deuteration toward the protostellar shock L1157-B1, based on spectral surveys performed with the Herschel-HIFI and IRAM 30 m telescopes. The L1157 outflow is driven by a low-mass Class 0 protostar and is considered the prototype of the so-called chemically active outflows. The young (2000 yr), bright blueshifted bow s…
Intracluster light in clusters of galaxies at redshifts 0.4 < z < 0.8
Ilbert, O.; Schrabback, T.; Allam, S. +27 more
Context. The study of intracluster light (ICL) can help us to understand the mechanisms taking place in galaxy clusters, and to place constraints on the cluster formation history and physical properties. However, owing to the intrinsic faintness of ICL emission, most searches and detailed studies of ICL have been limited to redshifts z < 0.4. <…
The Herschel HIFI water line survey in the low-mass proto-stellar outflow L1448
Liseau, R.; Codella, C.; van Dishoeck, E. F. +8 more
Aims: As part of the WISH (Water In Star-forming regions with Herschel) key project, systematic observations of H2O transitions in young outflows are being carried out with the aim of understanding the role of water in shock chemistry and its physical and dynamical properties. We report on the observations of several ortho- and par…
The Spatial Distribution of Dust and Stellar Emission of the Magellanic Clouds
Bot, Caroline; Lebouteiller, Vianney; Bernard, Jean-Philippe +24 more
We study the emission by dust and stars in the Large and Small Magellanic Clouds, a pair of low-metallicity nearby galaxies, as traced by their spatially resolved spectral energy distributions. This project combines Herschel Space Observatory PACS and SPIRE far-infrared photometry with other data at infrared and optical wavelengths (the data were …
Spectroscopic Detection of Carbon Monoxide in the Young Supernova Remnant Cassiopeia A
Reach, W. T.; Rho, J.; Onaka, T. +1 more
We report the detection of carbon monoxide (CO) emission from the young supernova remnant Cassiopeia A (Cas A) at wavelengths corresponding to the fundamental vibrational mode at 4.65 µm. We obtained AKARI Infrared Camera spectra toward four positions which unambiguously reveal the broad characteristic CO ro-vibrational band profile. The obs…
Herschel Detection of Dust Emission from UV-luminous Star-forming Galaxies at 3.3 <~ z <~ 4.3
Reddy, Naveen; Dey, Arjun; Alberts, Stacey +5 more
We report the Herschel/SPIRE detection of dust emission arising from UV-luminous (L >~ L*) star-forming galaxies at 3.3 <~ z <~ 4.3. Our sample of 1913 Lyman break galaxy (LBG) candidates is selected over an area of 5.3 deg2 in the Boötes field of the NOAO Deep Wide-Field Survey. This is one of the largest samples of UV-luminou…