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BEANS - a software package for distributed Big Data analysis
Hypki, Arkadiusz
BEANS software is a web-based, easy to install and maintain, new tool to store and analyse in a distributed way a massive amount of data. It provides a clear interface for querying, filtering, aggregating, and plotting data from an arbitrary number of data sets. Its main purpose is to simplify the process of storing, examining, and finding new rel…
On the inner disc structure of MWC480: evidence for asymmetries?
Matter, A.; Lopez, B.; Sitko, M. L. +7 more
Studying the physical conditions structuring the young circumstellar discs is required for understanding the onset of planet formation. Of particular interest is the protoplanetary disc surrounding the Herbig star MWC480. The structure and properties of the circumstellar disc of MWC480 are studied by infrared interferometry and interpreted from a …
Dust in the outer layers of the Barnard 5 globule
Il'in, V. B.; Prokopjeva, M. S.; Efimov, Yu S. +2 more
We present the results of our UBVRI polarimetric observations of a dozen stars located close to the well-studied Bok globule Barnard 5 (B5), with several of the stars being seen through its outer layers (with AV up to ∼3 mag). Using recent astrometric, spectroscopic and photometric surveys, we estimate the distance, spectral class and v…
Dust in the eye of Andromeda
Smith, M. W. L.; Eales, S. A.; Marsh, K. A. +2 more
We present new Herschel-derived images of warm dust in the Andromeda galaxy, M31, with unprecedented spatial resolution (∼30 pc), column density accuracy, and constraints on the three-dimensional distributions of dust temperature and dust opacity index (hence grain size and composition), based on the new PPMAP Bayesian analysis procedure. We confi…
Sparse estimation of model-based diffuse thermal dust emission
Irfan, Melis O.; Bobin, Jérôme
Component separation for the Planck High Frequency Instrument (HFI) data is primarily concerned with the estimation of thermal dust emission, which requires the separation of thermal dust from the cosmic infrared background (CIB). For that purpose, current estimation methods rely on filtering techniques to decouple thermal dust emission from CIB a…
Improving catalogue matching by supplementing astrometry with additional photometric information
Wilson, Tom J.; Naylor, Tim
The matching of sources between photometric catalogues can lead to cases where objects of differing brightness are incorrectly assumed to be detections of the same source. The rejection of unphysical matches can be achieved through the inclusion of information about the sources' magnitudes. The method described here uses the additional photometric…
Bright compact bulges at intermediate redshifts
Sachdeva, Sonali; Saha, Kanak
Studying bright (MB < -20), intermediate-redshift (0.4 < z< 1.0), disc-dominated (nB < 2.5) galaxies from Hubble Space Telescope/Advanced Camera for Surveys and Wide Field Camera 3 in Chandra Deep Field-South, in rest-frame B and I band, we found a new class of bulges that is brighter and more compact than ellipti…
Dawn-dusk asymmetry induced by the Parker spiral angle in the plasma dynamics around comet 67P/Churyumov-Gerasimenko
Behar, E.; Nilsson, H.; Tabone, B.
The solar wind and the ionized atmosphere of a comet, exchange energy and momentum on interacting. Our aim is to understand the influence of the average Parker spiral configuration of the solar wind magnetic field on this interaction. We compare the theoretical expectations of an analytical generalized gyromotion with Rosetta observations at comet…
Galactic cartography with SkyMapper - I. Population substructure and the stellar number density of the inner halo
Lewis, Geraint F.; Sharma, Sanjib; Ibata, Rodrigo A. +3 more
The stars within our Galactic halo presents a snapshot of its ongoing growth and evolution, probing galaxy formation directly. Here, we present our first analysis of the stellar halo from detailed maps of Blue Horizontal Branch (BHB) stars drawn from the SkyMapper Southern Sky Survey. To isolate candidate BHB stars from the overall population, we …
First Extended Catalogue of Galactic bubble infrared fluxes from WISE and Herschel surveys
Umana, G.; Riggi, S.; Trigilio, C. +8 more
In this paper, we present the first extended catalogue of far-infrared fluxes of Galactic bubbles. Fluxes were estimated for 1814 bubbles, defined here as the 'golden sample', and were selected from the Milky Way Project First Data Release (Simpson et al.) The golden sample was comprised of bubbles identified within the Wide-field Infrared Survey …