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|Title:||The GALEX Ultraviolet Virgo Cluster Survey (GUViCS). V. Ultraviolet diffuse emission and cirrus properties in the Virgo cluster direction||Authors:||Boissier, S.
Duc, P. -A.
Cuillandre, J. -C.
Davies, J. I.
Smith, M. W. L.
|Issue Date:||2015||Journal:||ASTRONOMY & ASTROPHYSICS||Number:||579||First Page:||A29||Abstract:||Context. The Virgo direction has been observed at many wavelengths in recent years, in particular in the ultraviolet with GALEX. The far ultraviolet (FUV) diffuse light detected by GALEX offers interesting information on the large scale distribution of Galactic dust, owing to the GALEX FUV band sensitivity and resolution. <BR /> Aims: We aim to characterise the ultraviolet large scale distribution of diffuse emission in the Virgo direction. A map of this emission may become useful for various studies by identifying regions where dust affects observations by either scattering light or absorbing radiation. <BR /> Methods: We constructed mosaics of the FUV and near ultraviolet (NUV) diffuse emission over a large sky region (RA 12 to 13 h, Dec 0 to 20 deg) surrounding the Virgo cluster, using all the GALEX available data in the area. We tested for the first time the utilisation of the FUV diffuse light as a Galactic extinction E(B - V) tracer. <BR /> Results: The FUV diffuse light scattered on cirrus reveals details about their geometry. Despite large dispersion, the FUV diffuse light correlates roughly with other Galactic dust tracers (coming from IRAS, Herschel, Planck), offering an opportunity to use the FUV emission to locate them in future studies with a better resolution (about 5 arcsec native resolution, 20 arcsec pixels maps presented in this paper) than for several usual tracers. Estimating the Galactic dust extinction on the basis of this emission allows us to find a smaller dispersion in the NUV - i colour of background galaxies at a given E(B - V) than with other tracers. The diffuse light mosaics obtained in this work are made publicly available. <P />The diffuse light mosaics as FITS files are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (ftp://18.104.22.168) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/579/A29">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/579/A29</A>||Acknowledgments:||We thank the referee for interesting comments and references. Based on observations made with the NASA Galaxy Evolution Explorer. GALEX is operated for NASA by the California Institute of Technology under NASA contract NAS5-98034. We wish to thank the GALEX Time Allocation Committee for the generous allocation of time devoted to GUViCS. This work is supported by the French Agence Nationale de la Recherche (ANR) grant programme Blanc VIRAGE (ANR10-BLANC-0506-01). This research made use of the GOLDMine Database. This research made use of the NASA/IPAC ExtraGalactic Database (NED), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. This research made use of Montage, funded by the National Aeronautics and Space Administration’s Earth Science Technology Office, Computation Technologies Project, under Cooperative Agreement Number NCC5-626 between NASA and the California Institute of Technology. Montage is maintained by the NASA/IPAC Infrared Science Archive. This research made use of IRAF. IRAF is distributed by the National Optical Astronomy Observatory, which is operated by the Association of Universities for Research in Astronomy (AURA) under cooperative agreement with the National Science Foundation. C.P. acknowledges support from the Science and Technology Foundation (FCT, Portugal) through the Postdoctoral Fellowship SFRH/BPD/90559/2012, PEst-OE/FIS/UI2751/2014, and PTDC/FIS-AST/2194/2012. S.B. thanks Laurent Cambresy for Aladin tips and congratulates him for his recent HDR.||URI:||http://hdl.handle.net/20.500.12386/23129||URL:||https://www.aanda.org/articles/aa/abs/2015/07/aa26089-15/aa26089-15.html||ISSN:||0004-6361||DOI:||10.1051/0004-6361/201526089||Bibcode ADS:||2015A&A...579A..29B||Fulltext:||open|
|Appears in Collections:||1.01 Articoli in rivista|
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