DSpace Repository

Browsing by Author "Fabbiano, G."

Browsing by Author "Fabbiano, G."

Sort by: Order: Results:

  • The Chandra view of the relation between X-ray and UV emission in quasars 
    Bisogni, S.; Lusso, E.; Civano, Francesca; Nardini, E.; Risaliti, G.; Elvis, M.; Fabbiano, G. (2021)
    We present a study of the relation between X-rays and ultraviolet emission in quasars for a sample of broad-line, radio-quiet objects obtained from the cross-match of the Sloan Digital Sky Survey DR14 with the latest Chandra ...
  • CLaSPS: A New Methodology for Knowledge Extraction from Complex Astronomical Data Sets 
    D'Abrusco, Raffaele; Fabbiano, G.; Djorgovski, G.; Donalek, C.; Laurino, O.; Longo, G. (2012)
    In this paper, we present the Clustering-Labels-Score Patterns Spotter (CLaSPS), a new methodology for the determination of correlations among astronomical observables in complex data sets, based on the application of ...
  • A close nuclear black-hole pair in the spiral galaxy NGC3393 
    Fabbiano, G.; Wang, Junfeng; Elvis, M.; Risaliti, G. (2011)
    The current picture of galaxy evolution advocates co-evolution of galaxies and their nuclear massive black holes, through accretion and galactic merging. Pairs of quasars, each with a massive black hole at the centre of ...
  • Deep Chandra Monitoring Observations of NGC 4649. I. Catalog of Source Properties 
    Luo, B.; Fabbiano, G.; Strader, J.; Kim, D. -W; Brodie, J. P.; Fragos, T.; Gallagher, J. S.; King, A.; Zezas, Andreas (2013)
    We present the X-ray source catalog for the Chandra monitoring observations of the elliptical galaxy, NGC 4649. The galaxy has been observed with Chandra ACIS-S3 in six separate pointings, reaching a total exposure of 299 ...
  • Deep Chandra Observations of ESO 428-G014. II. Spectral Properties and Morphology of the Large-scale Extended X-Ray Emission 
    Fabbiano, G.; Paggi, A.; Karovska, M.; Elvis, M.; Maksym, W. Peter; Risaliti, G.; Wang, Junfeng (2018)
    We present a deep Chandra spectral and spatial study of the kpc-scale diffuse X-ray emission of the Compton-thick (CT) active galactic nucleus (AGN) ESO 428-G014. The entire spectrum is best fit with composite photoionization ...
  • Deep Chandra Observations of NGC 5728: Morphology and Spectral Properties of the Extended X-Ray Emission 
    Trindade Falcao, Anna; Fabbiano, G.; Elvis, Martin; Paggi, A.; Maksym, W. Peter (2023)
    Recent deep Chandra observations of nearby Compton-thick (CT) active galactic nuclei (AGNs) have produced surprising results, uncovering extended emission not only in soft X-rays but also in hard emission (>3 keV), challenging ...
  • Discovery of a Kiloparsec Extended Hard X-Ray Continuum and Fe–Ka from the Compton Thick AGN ESO 428-G014 
    Fabbiano, G.; Elvis, M.; Paggi, A.; Karovska, M.; Maksym, W. Peter; Raymond, J.; Risaliti, G.; Wang, Junfeng (2017)
    We report the discovery of kiloparsec-scale diffuse emission in both the hard continuum (3–6 keV) and in the Fe–Ka line in the Compton thick (CT) Seyfert galaxy ESO 428-G014. This extended hard component contains at least ...
  • Early-type Galaxies in the Chandra COSMOS Survey 
    Civano, Francesca; Fabbiano, G.; Pellegrini, S.; Kim, D. -W; Paggi, A.; Feder, R.; Elvis, M. (2014)
    We study a sample of 69 X-ray detected early-type galaxies (ETGs), selected from the Chandra COSMOS survey, to explore the relation between the X-ray luminosity of hot gaseous halos (L <SUB> X, gas</SUB>) and the integrated ...
  • The Exceptional Soft X-Ray Halo of the Galaxy Merger NGC 6240 
    Nardini, E.; Wang, Junfeng; Fabbiano, G.; Elvis, M.; Pellegrini, S.; Risaliti, G.; Karovska, M.; Zezas, Andreas (2013)
    We report on a recent ~150 ks long Chandra observation of the ultraluminous infrared galaxy merger NGC 6240, which allows a detailed investigation of the diffuse galactic halo. Extended soft X-ray emission is detected at ...
  • Extended Hard X-Ray Emission in Highly Obscured AGNs 
    Ma, Jingzhe; Elvis, Martin; Fabbiano, G.; Balokovic, Mislav; Maksym, W. Peter; Risaliti, Guido (2023)
    Kiloparsec-scale hard (>3 keV) X-ray continuum and fluorescent Fe Ka line emission has been recently discovered in nearby Compton-thick (CT) active galactic nuclei (AGNs), which opens new opportunities to improve AGN torus ...
  • The Extended Spatial Distribution of Globular Clusters in the Core of the Fornax Cluster 
    D'Abrusco, Raffaele; Cantiello, M.; Paolillo, M.; Pota, V.; Napolitano, N. R.; Limatola, L.; Spavone, M.; Grado, A.; Iodice, E.; Capaccioli, M.; Peletier, R.; Longo, G.; Hilker, M.; Mieske, S.; Grebel, E. K.; Lisker, T.; Wittmann, C.; van de Ven, G.; Schipani, P.; Fabbiano, G. (2016)
    We report the discovery of a complex extended density enhancement in the Globular Clusters (GCs) in the central ˜ 0.5{(^\circ )}<SUP>2</SUP> (˜ 0.06 Mpc<SUP>2</SUP>) of the Fornax cluster, corresponding to ˜ 50% of the ...
  • Extended X-Ray Emission in Compton Thick AGN with Deep Chandra Observations 
    Jones, Mackenzie L.; Parker, Kieran; Fabbiano, G.; Elvis, Martin; Maksym, W. Peter; Paggi, A.; Ma, Jingzhe; Karovska, M.; Siemiginowska, Aneta; Wang, Junfeng (2021)
    We present the spatial analysis of five Compton thick (CT) active galactic nuclei (AGNs), including MKN 573, NGC 1386, NGC 3393, NGC 5643, and NGC 7212, for which high-resolution Chandra observations are available. For ...
  • Intermediate-mass black holes in dwarf galaxies out to redshift &amp;tilde;2.4 in the Chandra COSMOS-Legacy Survey 
    Mezcua, M.; Civano, Francesca; Marchesi, S.; Suh, H.; Fabbiano, G.; Volonteri, M. (2018)
    We present a sample of 40 active galactic nucleus (AGN) in dwarf galaxies at redshifts z &amp;lsim; 2.4. The galaxies are drawn from the Chandra COSMOS-Legacy survey as having stellar masses 10<SUP>7</SUP> <SUB>*</SUB> ...
  • Jet-ISM Interaction in NGC 1167/B2 0258+35, an LINER with an AGN Past 
    Fabbiano, G.; Paggi, A.; Morganti, R.; Balokovic, M.; Elvis, M.; Mukherjee, D.; Meenakshi, M.; Siemiginowska, Aneta; Murthy, S. M.; Oosterloo, T. A.; Wagner, A. Y.; Bicknell, G. (2022)
    We report the results of joint Chandra/ACIS-NuSTAR deep observations of NGC 1167, the host galaxy of the young radio jet B2 0258+35. In the ACIS data, we detect X-ray emission, extended both along and orthogonal to the ...
  • Knowledge Discovery Workflows in the Exploration of Complex Astronomical Datasets 
    D'Abrusco, Raffaele; Fabbiano, G.; Laurino, O.; Longo, G.; Ballester, P.; Egret, D.; Lorente, N. P. F. (2012)
    In this paper we present the Clustering-Labels-Score Patterns Spotter (CLaSPS), a new methodology for the determination of correlations among astronomical observables in complex datasets, based on the application of distinct ...
  • Low-mass X-Ray Binaries and Globular Clusters Streamers and Arcs in NGC 4278 
    D'Abrusco, Raffaele; Fabbiano, G.; Brassington, N. J. (2014)
  • Luminosity function of low-mass X-ray binaries in the globular cluster system of NGC 1399 
    D'Ago, G.; Paolillo, M.; Fabbiano, G.; Puzia, T. H.; Maccarone, T. J.; Kundu, A.; Goudfrooij, P.; Zepf, S. E. (2014)
    <br/> Aims: We present a study of the faint end of the X-ray luminosity function (XLF) of low-mass X-ray binaries (LMXBs) in the Globular Cluster (GC) system of the cD galaxy NGC 1399. <br/> Methods: We performed a stacking ...
  • Metallicity Effect on Low-mass X-Ray Binary Formation in Globular Clusters 
    Kim, D. -W; Fabbiano, G.; Ivanova, N.; Fragos, T.; Jordán, A.; Sivakoff, G. R.; Voss, R. (2013)
    We present comprehensive observational results of the metallicity effect on the fraction of globular clusters (GCs) that contain low-mass X-ray binaries (LMXB), by utilizing all available data obtained with Chandra for ...
  • On the Origin of the Metallicity Dependence in Dynamically formed Extragalactic Low-mass X- Ray Binaries 
    Ivanova, N.; Fragos, T.; Kim, D. -W; Fabbiano, G.; Avendano Nandez, J. L.; Lombardi, J. C.; Sivakoff, G. R.; Voss, R.; Jordán, A. (2012)
    Globular clusters (GCs) effectively produce dynamically formed low-mass X-ray binaries (LMXBs). Observers detect ~100 times more LMXBs per stellar mass in GCs compared to stars in the fields of galaxies. Observationally, ...
  • Periodic signals from the Circinus region: two new cataclysmic variables and the ultraluminous X-ray source candidate GC X-1 
    Esposito, P.; Israel, G. L.; Milisavljevic, D.; Mapelli, M.; Zampieri, L.; Sidoli, L.; Fabbiano, G.; Rodríguez Castillo, G. A. (2015)
    The examination of two 2010 Chandra ACIS (Advanced CCD Imaging Spectrometer) exposures of the Circinus galaxy resulted in the discovery of two pulsators: CXO J141430.1-651621 and CXOU J141332.9-651756. We also detected 26 ...

Search DSpace

Browse

My Account