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In the next few years the classification of radio sources observed by the large surveys will be a challenging problem and spectral index is a powerful tool for addressing it. Here we present an algorithm to estimate the spectral index of sources from multiwavelength radio images. We have applied ...


Cavallaro, F.Trigilio, C.Umana, G.Franzen, T.M.O.Norris, R.P.Leto, P.Ingallinera, A.Buemi, C.S.Marvil, J.Agliozzo, C.Bufano, F.Cerrigone, L.Riggi, S.[SCORPIO - II. Spectral indices of weak Galactic radio sources]SCORPIO - II. Spectral indices of weak Galactic radio sources

A.R.B., P.d.L., and V.H. acknowledge financial support form the ANR 14-CE33-014-01. This work was partly supported by the European Union FP7 programme through ERC grant number 320360 and by the Leverhulme Trust through grant RPG-2012-541. We acknowledge the support from INAF and Ministero dell'Is...


Recio-Blanco, A.Rojas-Arriagada, A.de Laverny, P.Mikolaitis, S.Hill, V.Zoccali, M.Fernández-Trincado, J. G.Robin, A. C.Babusiaux, C.Gilmore, G.Randich, S.Alfaro, E.C., Allende PrietoBragaglia, A.Carraro, G.Jofré, P.Lardo, C.Monaco, L.Morbidelli, L.Zaggia, S.[The Gaia-ESO Survey: Low-α element stars in the Galactic bulge]The Gaia-ESO Survey: Low-α element stars in the Galactic bulge

The galaxy formation process in the A cold dark matter scenario can be constrained from the analysis of stars in the Milky Way's halo system. We examine the variation of chemical abundances in distant halo stars observed by the Apache Point Observatory Galactic Evolution Experiment ( APOGEE), as ...


Fernandez-Alvar, ECarigi, LPrieto, CAHayden, MRBeers, TCFernandez-Trincado, JGMeza, ASchultheis, MSantiago, BXQueiroz, ABAnders, Fda Costa, LNChiappini, C[Chemical trends in the Galactic halo from APOGEE data]Chemical trends in the Galactic halo from APOGEE data

Rojas-Arriagada, A.Recio-Blanco, A.de Laverny, P.Schultheis, M.Guiglion, G.Mikolaitis, Š.Kordopatis, G.Hill, V.Gilmore, G.Randich, S.Alfaro, E. J.Bensby, T.Koposov, S. E.Costado, M. T.Franciosini, E.Hourihane, A.Jofré, P.Lardo, C.Lewis, J.Lind, K.Magrini, L.Monaco, L.Morbidelli, L.Sacco, G. G.Worley, C. C.Zaggia, S.Chiappini, C.[The Gaia-ESO Survey: Separating disk chemical substructures with cluster models⋆ Evidence of a separate evolution in the metal-poor thin disk]The Gaia-ESO Survey: Separating disk chemical substructures with cluster models⋆ Evidence of a separate evolution in the metal-poor thin disk

Context. The inner regions of the Galaxy are severely affected by extinction, which limits our capability to study the stellar populations present there. The Vista Variables in the Vía Láctea (VVV) ESO Public Survey has observed this zone at near-infrared wavelengths where reddening is highly dim...


Alonso-García, J.Saito, R.K.Hempel, M.Minniti, D.Pullen, J.Catelan, M.Ramos, R.C.Cross, N.J.G.Gonzalez, O.A.Lucas, P.W.Palma, T.Valenti, E.Zoccali, M.[Milky Way demographics with the VVV survey: IV. PSF photometry from almost one billion stars in the Galactic bulge and adjacent southern disk]Milky Way demographics with the VVV survey: IV. PSF photometry from almost one billion stars in the Galactic bulge and adjacent southern disk

We report the discovery of an enigmatic large-amplitude (ΔKs >10.5 mag) transient event in near-IR data obtained by the VISTA Variables in the Via Lactea (VVV) ESO Public Survey. The object (designated VVV-WIT- 06) is located at R.A.=17:07:18.917, decl.=-39:06:26.45 (J2000), corresponding to Gala...


Minniti, D.Saito, R.K.Forster, F.Pignata, G.Ivanov, V.D.Lucas, P.W.Beamin, J.C.Borissova, J.Catelan, M.Gonzalez, O.A.Hempel, M.Hsiao, E.Kurtev, R.Majaess, D.Masetti, N.Morrell, N.I.Phillips, M.M.Pullen, J.B.Rejkuba, M.Smith, L.Surot, F.Valenti, E.Zoccali, M.[The Emergence of the Infrared Transient VVV-WIT-06]The Emergence of the Infrared Transient VVV-WIT-06

Context. The VISTA Variables in the Vía Láctea (VVV) is a near-IR time-domain survey of the Galactic bulge and southern plane. One of the main goals of this survey is to reveal the 3D structure of the Milky Way through their variable stars. In particular, enormous numbers of RR Lyrae stars have b...


Gran, F.Minniti, D.Saito, R. K.Zoccali, M.Gonzalez, O. A.Navarrete, C.Catelan, M.Contreras Ramos, R.Elorrieta, F.Eyheramendy, S.Jordán, A.[Mapping the outer bulge with RRab stars from the VVV Survey]Mapping the outer bulge with RRab stars from the VVV Survey

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