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Recent Submissions

  • Observability of intermittent radio sources in galaxy groups and clusters 

    Yates, Patrick; Shabala, Stanislav; Krause, Martin (2018-11-11)
    We have carried out numerical hydrodynamic simulations of radio jets from active galactic nuclei using the PLUTO simulation code, with the aim of investigating the effect of different environments and intermittency of ...
  • The Emergence of the Infrared transient VVV-WIT-06 

    Minniti, Dante; Saito, Roberto K.; Forster, F.; Pignata, G.; Ivanov, Valentin D.; Lucas, Philip; Beamin, J.C.; Borissova, Jura; Catelan, Marcio; Gonzalez, Oscar A.; Hempel, Maren; Hsiao, E; Kurtev, Radostin; Majaess, Daniel; Masetti, N.; Morrell, N.I.; Phillips, M.M.; Pullen, J. B.; Rejkuba, M.; Smith, L.C.; Surot, F.; Valenti, Elena; Zoccali, Manuela (2017-11-03)
    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 ...
  • FSR 1716: A new Milky Way Globular Cluster confirmed using VVV RR Lyrae stars 

    Minniti, Dante; Palma, Tali; Dékány, Istvan; Hempel, Maren; Rejkuba, Marina; Pullen, Joyce; Alonso-García, Javier; Barbá, Rodolfo; Barbuy, Beatriz; Bica, Eduardo; Bonatto, Charles; Borissova, Jura; Catelan, Marcio; Carballo-Bello, Julio A.; Chene, Andre Nicolas; Clariá, Juan J.; Cohen, Roger E.; Contreras-Ramos, Rodrigo; Dias, Bruno; Emerson, Jim; Froebrich, Dirk; Buckner, Anne S. M.; Geisler, Douglas; Gonzalez, Oscar A.; Gran, Felipe; Hagdu, Gergely; Irwin, Mike; Ivanov, Valentin D.; Kurtev, Radostin; Lucas, Philip W.; Majaess, Daniel; Mauro, Francesco; Moni-Bidin, Christian; Navarrete, Camila; Alegría, Sebastian Ramírez; Saito, Roberto K.; Valenti, Elena; Zoccali, Manuela (2017-03-24)
    We use deep multi-epoch near-IR images of the VISTA Variables in the V\'ia L\'actea (VVV) Survey to search for RR Lyrae stars towards the Southern Galactic plane. Here we report the discovery of a group of RR Lyrae stars ...
  • ICTV Virus Taxonomy Profile: Chrysoviridae 

    Coutts, Robert (2018-01-01)
    The Chrysoviridae is a family of small, isometric, non-enveloped viruses (40 nm in diameter) with segmented dsRNA genomes (typically four segments). The genome segments are individually encapsidated and together comprise ...
  • Radio jets in NGC 4151 where eMERLIN meets HST 

    Williams, D. R. A.; McHardy, I. M.; Baldi, R. D.; Beswick, R. J.; Argo, M. K.; Dullo, B. T.; Knapen, J. H.; Brinks, E.; Fenech, D. M.; Mundell, C.G.; Muxlow, T.W.B.; Panessa, F.; Rampadarath, H.; Westcott, J. (2017-12-21)
    We present high-sensitivity eMERLIN radio images of the Seyfert galaxy NGC 4151 at 1.5 GHz. We compare the new eMERLIN images to those from archival MERLIN observations in 1993 to determine the change in jet morphology in ...
  • Color difference makes a difference: four planet candidates around tau Ceti 

    Feng, F.; Tuomi, Mikko; Jones, Hugh; Barnes, J.; Anglada-Escude, G.; Vogt, S. S.; Butler, R. P. (2017-09-05)
    The removal of noise typically correlated in time and wavelength is one of the main challenges for using the radial velocity method to detect Earth analogues. We analyze radial velocity data of tau Ceti and find robust ...
  • New VVV Survey Globular Cluster Candidates in the Milky Way Bulge 

    Minniti, Dante; Geisler, Douglas; Alonso-García, Javier; Palma, Tali; Beamin, Juan Carlos; Borissova, Jura; Catelan, Marcio; Clariá, Juan J.; Cohen, Roger E.; Ramos, Rodrigo Contreras; Dias, Bruno; Fernandez-Trincado, Jose; Gomez, Matias; Hempel, Maren; Ivanov, Valentin D.; Kurtev, Radostin; Lucas, Philip; Moni-Bidin, Christian; Pullen, Joyce; Alegría, Sebastian Ramírez; Saito, Roberto K.; Valenti, Elena (2017-11-10)
    It is likely that a number of Galactic globular clusters remain to be discovered, especially toward the Galactic bulge. High stellar density combined with high and differential interstellar reddening are the two major ...
  • The HP2 Survey - IV. The Pipe nebula : Effective dust temperatures in dense cores 

    Hasenberger, Birgit; Lombardi, Marco; Alves, João; Forbrich, Jan; Hacar, Alvaro; Lada, Charles J. (2018-07-16)
    Multi-wavelength observations in the sub-mm regime provide information on the distribution of both the dust column density and the effective dust temperature in molecular clouds. In this study, we created high-resolution ...
  • Radiative age mapping of the remnant radio galaxy B2 0924+30 : The LOFAR perspective 

    Shulevski, A.; Morganti, R.; Harwood, J. J.; Barthel, P. D.; Jamrozy, M.; Brienza, M.; Brunetti, G.; Röttgering, H. J.A.; Murgia, M.; White, G. J.; Croston, J. H.; Brüggen, M. (2017-04-01)
    We have observed the steep spectrum radio source B2 0924+30 using the LOw Frequency ARray (LOFAR) telescope. Hosted by a z = 0.026 elliptical galaxy, it has a relatively large angular size of 12′ (corresponding to 360 kpc ...
  • Squeezed between shells? On the origin of the Lupus I molecular cloud. - II. APEX CO and GASS HI observations 

    Gaczkowski, B.; Roccatagliata, V.; Flaischlen, S.; Kroell, D.; Krause, M.~G.~H.; Burkert, A.; Diehl, R.; Fierlinger, K.; Ngoumou, J.; Preibisch, T. (2017-12-12)
    Context. The Lupus I cloud is found between the Upper-Scorpius (USco) and the Upper-Centaurus-Lupus (UCL) sub-groups of the Scorpius-Centaurus OB-association, where the expanding USco H I shell appears to interact with a ...
  • In-depth study of moderately young but extremely red, very dusty substellar companion HD206893B 

    Delorme, P.; Schmidt, T.; Bonnefoy, M.; Desidera, S.; Ginski, C.; Charnay, B.; Lazzoni, C.; Christiaens, V.; Messina, S.; D'Orazi, V.; Milli, J.; Schlieder, Joshua E.; Gratton, R.G.; Rodet, L.; Lagrange, A-M; Absil, O.; Vigan, A.; Galicher, R.; Hagelberg, J.; Bonavita, Mariangela; Lavie, B.; Zurlo, A; Olofsson, J.; Boccaletti, A.; Cantalloube, F.; Mouillet, D.; Chauvin, G.; Hambsch, F. -J.; Langlois, M.; Udry, S.; Henning, Th; Beuzit, J-L; Mordasini, Christoph; Lucas, P.; Marocco, F.; Biller, B.; Carson, J.; Cheetham, A.; Covino, E.; Caprio, V. De; Delboulbe, A.; Feld, M.; Girard, J.H.V.; Hubin, N.; Maire, A-L; Pavlov, A.; Petit, C.; Rouan, D.; Roelfsema, R.; Wildi, F. (2017-12-08)
    The substellar companion HD206893b has recently been discovered by direct imaging of its disc-bearing host star with the SPHERE instrument. We investigate the atypical properties of the companion, which has the reddest ...
  • Search and modelling of remnant radio galaxies in the LOFAR Lockman Hole field 

    Brienza, M.; Godfrey, L.; Morganti, R.; Prandoni, I.; Harwood, J.; Mahony, E. K.; Hardcastle, M. J.; Murgia, Matteo; Röttgering, H.~J.~A.; Shimwell, Timothy W.; Shulevski, Aleksander (2017-10-20)
    The phase of radio galaxy evolution after the jets have switched off, often referred to as the remnant phase, is poorly understood and very few sources in this phase are known. In this work we present an extensive search ...
  • Correlated optical, X-ray, and $-ray flaring activity seen with INTEGRAL during the 2015 outburst of V404 Cygni 

    Rodriguez, J.; Cadolle Bel, M.; Alfonso-Garzón, J.; Siegert, T.; Zhang, X.-L.; Grinberg, V.; Savchenko, V.; Tomsick, J.~A.; Chenevez, J.; Clavel, M.; Corbel, S.; Diehl, R.; Domingo, A.; Gouiffès, C.; Greiner, J.; Krause, M.~G.~H.; Laurent, P.; Loh, A.; Markoff, S.; Mas-Hesse, J.~M.; Miller-Jones, J.~C.~A.; Russell, D.~M.; Wilms, J. (2015-09-23)
    After 25 years of quiescence, the microquasar V404 Cyg entered a new period of activity in June 2015. This X-ray source is known to undergo extremely bright and variable outbursts seen at all wavelengths. It is therefore ...
  • Abundances of carbon-enhanced metal-poor stars as constraints on their formation 

    Hansen, C.J.; Nordström, B.; Hansen, T.T.; Kennedy, C.R.; Placco, V.M.; Beers, T.C.; Andersen, J.; Cescutti, Gabriele; Chiappini, Cristina (2016-04-01)
    Context. An increasing fraction of carbon-enhanced metal-poor (CEMP) stars is found as their iron abundance, [Fe/H], decreases below [Fe/H] =−2.0. The CEMP-s stars have the highest absolute carbon abundances, [C/H], and ...
  • Time as It Could Be Measured in Artificial Living Systems 

    Robu, Andrei; Polani, Daniel (MIT Press, 2017-09-04)
    Being able to measure time, whether directly or indirectly, is a significant advantage for an organism. It permits it to predict regular events, and prepare for them on time. Thus, clocks are ubiquitous in biology. In the ...
  • The Gaia-ESO Survey : the N/O abundance ratio in the Milky Way 

    Magrini, L.; Vincenzo, F.; Randich, S.; Pancino, E.; Casali, G.; Tautvaisiene, G.; Drazdauskas, A.; Mikolaitis, S.; Minkeviciute, R.; Stonkute, E.; Chorniy, Y.; Bagdonas, V.; Kordopatis, G.; Frie, E.; Roccatagliata, V.; Jimenez-Esteban, F. M.; Gilmore, G.; Vallenari, A.; Bensby, T.; Bragaglia, A.; Korn, A. J.; Lanzafame, A. C.; Smiljanic, R.; Bayo, A.; Casey, A. R.; Costado, M. T.; Franciosini, E.; Hourihane, A.; Jofré, P.; Lewis, J.; Monaco, L.; Morbidelli, L.; Sacco, G.; Worley, C. (2018-07-16)
    The abundance ratio N/O is a useful tool to study the interplay of galactic processes, e.g. star formation efficiency, time-scale of infall and outflow loading factor We aim to trace log(N/O) versus [Fe/H] in the Milky Way ...
  • LOFAR MSSS: The Scaling Relation between AGN Cavity Power and Radio Luminosity at Low Radio Frequencies 

    Kokotanekov, G.; Wise, Michael; Heald, G. H.; McKean, J. P.; Bîrzan, L.; Rafferty, D. A.; Godfrey, L. E H; Vries, M. de; Intema, Huib T.; Broderick, J. W.; Hardcastle, M. J.; Bonafede, A.; Clarke, A. O.; Weeren, R. J. van; Röttgering, H.~J.~A.; Pizzo, R.; Iacobelli, M.; Orrú, E.; Shulevski, Alexander; Riseley, C. J.; Breton, R. P.; Nikiel-Wroczyński, B.; Sridhar, S. S.; Stewart, A. J.; Rowlinson, A.; Horst, A. J. van der; Harwood, J. J.; Gürkan, G.; Carbone, D.; Pandey-Pommier, M.; Tasse, C.; Scaife, A. M. M.; Pratley, L.; Ferrari, Chiara; Croston, J. H.; Pandey, V. N.; Jurusik, W.; Mulcahy, D. D. (2017-09-07)
    We present a new analysis of the widely used relation between cavity power and radio luminosity in clusters of galaxies with evidence for strong AGN feedback. We study the correlation at low radio frequencies using two new ...
  • Detection of Newly Emerging Psychoactive Substances Using Raman Spectroscopy and Chemometrics 

    Calvo-Castro, Jesus; Guirguis, Amira; Samaras, Eleftherios; Zloh, Mire; Kirton, Stewart; Stair, Jacqueline (2018-09-12)
    A novel approach for the identification of New Psychoactive Substances (NPS) by means of Raman spectroscopy coupled with Principal Components Analysis (PCA) employing the largest dataset of NPS reference materials to date ...
  • A Kosambi-Karhunen–Loève Learning Approach to Cooperative Spectrum Sensing in Cognitive Radio Networks 

    Simpson, Oluyomi; Abdulkadir, Yusuf; Sun, Yichuang (2018-08-30)
    This paper focuses on the issues of cooperative spectrum sensing (CSS) in a large cognitive radio network (CRN) where cognitive radio (CR) nodes can cooperative with neighboring nodes using spatial cooperation. A novel ...
  • A Novel Visual Interface to Foster Innovation in Mechanical Engineering and Protect from Patent Infringement 

    Sorce, Salvatore; Malizia, Alessio; Jiang, Pingfei; Atherton, Mark; Harrison, David (2018-04-25)
    One of the main time and money consuming tasks in the design of industrial devices and parts is the checking of possible patent infringements. Indeed, the great number of documents to be mined and the wide variety of ...

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