Search Publications
Herschel-ATLAS: Planck sources in the phase 1 fields
Rodighiero, G.; Valtchanov, I.; Ivison, R. J. +32 more
We present the results of a cross-correlation of the Planck Early Release Compact Source catalogue (ERCSC) with the catalogue of Herschel-ATLAS sources detected in the phase 1 fields, covering 134.55°2. There are 28 ERCSC sources detected by Planck at 857 GHz in this area. As many as 16 of them are probably high Galactic latitude cirrus…
An interferometric study of the post-AGB binary 89 Herculis. I. Spatially resolving the continuum circumstellar environment at optical and near-IR wavelengths with the VLTI, NPOI, IOTA, PTI, and the CHARA Array
Chesneau, O.; Banerjee, D. P. K.; Verhoelst, T. +9 more
Context. Binary post-asymptotic giant branch (post-AGB) stars are interesting laboratories to study both the evolution of binaries as well as the structure of circumstellar disks.
Aims: A multiwavelength high angular resolution study of the prototypical object 89 Herculis is performed with the aim of identifying and locating the different emi…
Proper motions of young stars in Chamaeleon. I. A Virtual Observatory study of spectroscopically confirmed members
Bayo, A.; Solano, E.; Barrado, D. +3 more
Context. The study of the motion of the members of a given open cluster or stellar association provides key information about their formation and early evolution. The Chamaeleon cloud complex constitutes one of the closest and best studied low-mass star-forming regions in the Galaxy.
Aims: We want to provide further evidence of the origin of …
AKARI/IRC 18 µm survey of warm debris disks
Marshall, J. P.; White, G. J.; Nakagawa, T. +11 more
Context. Little is known about the properties of the warm (Tdust ≳ 150 K) debris disk material located close to the central star, which has a more direct link to the formation of terrestrial planets than does the low-temperature debris dust that has been detected to date.
Aims: To discover new warm debris disk candidates that show …
Mapping water in protostellar outflows with Herschel. PACS and HIFI observations of L1448-C
Liseau, R.; Codella, C.; Benedettini, M. +13 more
Context. Water is a key probe of shocks and outflows from young stars because it is extremely sensitive to both the physical conditions associated with the interaction of supersonic outflows with the ambient medium and the chemical processes at play.
Aims: Our goal is to investigate the spatial and velocity distribution of H2O alon…
Combined IRAM and Herschel/HIFI study of cyano(di)acetylene in Orion KL: tentative detection of DC3N
Cernicharo, José; Viti, Serena; Palau, Aina +8 more
Context. We present a study of cyanoacetylene (HC3N) and cyanodiacetylene (HC5N) in Orion KL using observations from two line surveys performed with the IRAM 30-m telescope and the HIFI instrument onboard the Herschel telescope. The frequency ranges covered are 80-280 GHz and 480-1906 GHz.
Aims: This study (divided by fa…
Impact flux on Jupiter: From superbolides to large-scale collisions
Hueso, R.; Sánchez-Lavega, A.; Delcroix, M. +21 more
Context. Regular observations of Jupiter by a large number of amateur astronomers have resulted in the serendipitous discovery of short bright flashes in its atmosphere, which have been proposed as being caused by impacts of small objects. Three flashes were detected: one on June 3, 2010, one on August 20, 2010, and one on September 10, 2012.
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Improving the performance of solar flare prediction using active longitudes information
Huang, X.; Zhang, L.; Wang, H. +1 more
Context. Solar flare prediction models normally depend on properties of active regions, such as sunspot area, McIntosh classifications, Mount Wilson classifications, and various measures of the magnetic field. Nevertheless, the positional information of active regions has not been used.
Aims: We define a metric, DARAL (distance bet…
The velocity field of sunspot penumbrae. II. Return flow and magnetic fields of opposite polarity
Franz, M.; Schlichenmaier, R.
Aims: We search for penumbral magnetic fields of opposite polarity and for their correspondence with downflows.
Methods: We used spectropolarimetric HINODE data of a spot very close to disk center to suppress the horizontal velocity components as much as possible. We focus our study on 3-lobe Stokes V profiles.
Results: From forward…
Spin and activity of comet 67P/Churyumov-Gerasimenko
Lara, L. M.; Sierks, H.; Vincent, J. -B. +2 more
Aims: In 2014 ESA's spacecraft Rosetta will reach its final target: comet 67P/Churyumov-Gerasimenko (67P). Although this comet has been studied in great detail over the past decade, there are still some uncertainties regarding the actual spin orientation and the distribution of active regions on the surface. We here give an overview of our cu…