Search Publications
Dynamics of a Prominence-horn Structure during Its Evaporation in the Solar Corona
Liu, Wei; Li, Xing; Chen, Yao +3 more
The physical connections among and formation mechanisms of various components of the prominence-horn cavity system remain elusive. Here we present observations of such a system, focusing on a section of the prominence that rises and separates gradually from the main body. This forms a configuration sufficiently simple to yield clues regarding the …
Identification of z ≳ 2 Herschel 500 µM Sources Using Color Deconfusion
Elbaz, D.; Ferguson, H. C.; Leiton, R. +19 more
We present a new method to search for candidate z ≳ 2 Herschel 500 µm sources in the Great Observatories Origins Deep Survey-North field using a S500 µm/S24 µm “color deconfusion” technique. Potential high-z sources are selected against low-redshift ones from their large 500 to 24 µm flux density ratio…
Star Formation in Intermediate Redshift 0.2 < z < 0.7 Brightest Cluster Galaxies
Baum, Stefi A.; O'Dea, Christopher P.; Cooke, Kevin C. +3 more
We present a multi-wavelength photometric and spectroscopic study of 42 Brightest Cluster Galaxies (BCGs) in two samples of galaxy clusters chosen for a gravitational lensing study. The study’s initial sample combines 25 BCGs from the Cluster Lensing and Supernova Survey with Hubble sample and 37 BCGs from the Sloan Giant Arcs Survey with a total …
Evolution of active region outflows throughout an active region lifetime
Poletto, G.; Zangrilli, L.
Context. We have shown previously that SOHO/UVCS data allow us to detect active region (AR) outflows at coronal altitudes higher than those reached by other instrumentation. These outflows are thought to be a component of the slow solar wind.
Aims: Our purpose is to study the evolution of the outflows in the intermediate corona from AR 8100, …
The Environment of z > 1 3CR Radio Galaxies and QSOs: From Proto-clusters to Clusters of Galaxies?
Macchetto, F. D.; Capetti, A.; Sparks, W. B. +8 more
We study the cluster environment for a sample of 21 radio loud active galactic nuclei from the 3CR catalog at z\gt 1, 12 radio galaxies (RGs) and nine quasars, with Hubble Space Telescope (HST) images in the optical and IR. We use two different approaches to determine cluster candidates. We identify the early-type galaxies (ETGs) in every field by…
How unusual is the cool-core radio halo cluster CL1821+643?
Kale, Ruta; Parekh, Viral
Massive galaxy clusters with cool cores typically host diffuse radio sources called mini-haloes, whereas, those with non-cool cores host radio haloes. We attempt to understand the unusual nature of the cool-core galaxy cluster CL1821+643, which hosts a megaparsec-scale radio halo, using new radio observations and morphological analysis of its intr…
Multi-wavelength properties of IGR J05007-7047 (LXP 38.55) and identification as a Be X-ray binary pulsar in the LMC
Haberl, F.; Udalski, A.; Sturm, R. +2 more
We report on the results of a ∼40-d multi-wavelength monitoring of the Be X-ray binary system IGR J05007-7047 (LXP 38.55). During that period the system was monitored in the X-rays using the Swift telescope and in the optical with multiple instruments. When the X-ray luminosity exceeded 1036 erg s-1 we triggered an XMM-Newton…
Coalescence of magnetic flux ropes observed in the tailward high-speed flows
Zhao, Yan; Yao, Zhonghua; Lu, Quanming +3 more
We report a tailward high-speed flow event observed by Cluster during 0203:00UT-0205:30UT on 20 September 2003. Within the flows, a series of three bipolar Bz signatures were observed. The first and third bipolar Bz signatures are identified as magnetic flux ropes, while the middle one is found to result from the collision of…
Constraints on the H2O formation mechanism in the wind of carbon-rich AGB stars
Blommaert, J. A. D. L.; De Ridder, J.; de Koter, A. +13 more
Context. The recent detection of warm H2O vapor emission from the outflows of carbon-rich asymptotic giant branch (AGB) stars challenges the current understanding of circumstellar chemistry. Two mechanisms have been invoked to explain warm H2O vapor formation. In the first, periodic shocks passing through the medium immediate…
The size and shape of the Milky Way disc and halo from M-type brown dwarfs in the BoRG survey
Trenti, M.; Bouwens, R. J.; Holwerda, B. W. +3 more
We have identified 274 M-type brown dwarfs in the Hubble Space Telescope's Wide Field Camera 3 pure parallel fields from the Brightest of Reionizing Galaxies (BoRG) survey for high-redshift galaxies. These are near-infrared observations with multiple lines of sight out of our Milky Way. Using these observed M-type brown dwarfs, we fitted a Galacti…