Browsing by Author "Fabbiano, G."

Now showing items 1-12 of 12

    • AGN activity and the misaligned hot ISM in the compact radio elliptical NGC4278 

      Pellegrini, S.; Wang, J.; Fabbiano, G.; Kim, D.-W.; Brassington, Nicola; Gallagher, J.S.; Trinchieri, G.; Zezas, A. (2012-10-20)
      The analysis of a deep (579ks) Chandra ACIS pointing of the elliptical galaxy NGC4278, which hosts a low-luminosity active galactic nucleus (AGN) and compact radio emission, allowed us to detect extended emission from hot ...

    • Comparing GC and Field LMXBs in elliptical galaxies with Deep Chandra and Hubble Data 

      Kim, D.-W.; Fabbiano, G.; Brassington, Nicola; Fragos, T.; Kalogera, V.; Zezas, A.; Jordán, A.; Sivakoff, G.R.; Kundu, A.; Zepf, S.E.; Angelini, L.; Davies, R. L.; Gallagher, J.S.; Juett, A.M.; King, A.R.; Pellegrini, S.; Sarazin, C.L.; Trinchieri, G. (2009-09-01)
      We present a statistical study of the low-mass X-ray binary (LMXB) populations of three nearby, old elliptical galaxies: NGC 3379, NGC 4278, and NGC 4697. With a cumulative ~1 Ms Chandra ACIS observing time, we detect ...

    • Deep Chandra Monitoring Observations of NGC 3379 : Catalog of Source Properties 

      Brassington, Nicola; Fabbiano, G.; Kim, D.-W.; Zezas, A.; Zepf, S.; Kundu, A.; Angelini, L.; Davies, R. L.; Gallagher, J.; Kalogera, V.; Fragos, T.; King, A.R.; Pellegrini, S.; Trinchieri, G. (2008-11-01)
      We present the properties of the discrete X-ray sources detected in our monitoring program of the `typical' elliptical galaxy, NGC 3379, observed with Chandra ACIS-S in five separate pointings, resulting in a co-added ...

    • Deep Chandra Monitoring Observations of NGC 4278 : Catalog of Source Properties 

      Brassington, Nicola; Fabbiano, G.; Kim, D.-W.; Zezas, A.; Zepf, S.; Kundu, A.; Angelini, L.; Davies, R. L.; Gallagher, J.; Kalogera, V.; Fragos, T.; King, A.R.; Pellegrini, S.; Trinchieri, G. (2009-04-01)
      We present the properties of the discrete X-ray sources detected in our monitoring program of the globular cluster (GC) rich elliptical galaxy, NGC 4278, observed with Chandra ACIS-S in six separate pointings, resulting ...

    • Discovery of Hot Gas in Outflow in NGC 3379 

      Trinchieri, G.; Pellegrini, S.; Fabbiano, G.; Fu, R.; Brassington, Nicola; Zezas, A.; Kim, D.-W.; Gallagher, J.; Angelini, L.; Davies, R. L.; Kalogera, V.; King, A.R.; Zepf, S. (2008-12-01)
      We report the discovery of a faint (LX~4+/-1.5×1037 ergs s-1, 0.5-2 keV), outflowing gaseous hot interstellar medium (ISM) in NGC 3379. This represents the lowest X-ray luminosity ever measured from a hot phase of the ISM ...

    • FIELD AND GLOBULAR CLUSTER LOW-MASS X-RAY BINARIES IN NGC 4278 

      Fabbiano, G.; Brassington, Nicola; Lentati, L.; Angelini, L.; Davies, R. L.; Gallagher, J.; Kalogera, V.; Kim, D. -W.; King, A. R.; Kundu, A.; Pellegrini, S.; Richings, A. J.; Trinchieri, G.; Zezas, A.; Zepf, S. (2010-12)
      We report a detailed spectral analysis of the population of low-mass X-ray binaries (LMXBs) detected in the elliptical galaxy NGC 4278 with Chandra. Seven luminous sources were studied individually, four in globular clusters ...

    • Low-mass X-ray binaries and globular clusters streamers and ARCS in NGC 4278 

      D'Abrusco, R.; Fabbiano, G.; Brassington, Nicola (2014-03-01)
      We report significant inhomogeneities in the projected two-dimensional spatial distributions of low-mass X-ray binaries (LMXBs) and globular clusters (GCs) of the intermediate mass elliptical galaxy NGC 4278. In the inner ...

    • Models for Low-Mass X-Ray Binaries in the Elliptical Galaxies NGC 3379 and NGC 4278 : Comparison with Observations 

      Fragos, T.; Kalogera, V.; Belczynski, K.; Fabbiano, G.; Kim, D.-W.; Brassington, Nicola; Angelini, L.; Davies, R. L.; Gallagher, J.S.; King, A.R.; Pellegrini, S.; Trinchieri, G.; Zepf, S.E.; Kundu, A.; Zezas, A. (2008-08-01)
      We present theoretical models for the formation and evolution of populations of low-mass X-ray binaries (LMXBs) in the two elliptical galaxies NGC 3379 and NGC 4278. The models are calculated with the recently updated ...

    • Probing the X-ray binary populations of the ring galaxy NGC 1291 

      Luo, B.; Fabbiano, G.; Fragos, T.; Kim, D. -W.; Belczynski, K.; Brassington, Nicola; Pellegrini, S.; Tzanavaris, P.; Wang, Junfeng; Zezas, A. (2012-04)
      We present Chandra studies of the X-ray binary (XRB) populations in the bulge and ring regions of the ring galaxy NGC 1291. We detect 169 X-ray point sources in the galaxy, 75 in the bulge and 71 in the ring, utilizing the ...

    • The Spectral and Temporal Properties of Transient Sources in Early-type Galaxies 

      Brassington, Nicola; Fabbiano, G.; Zezas, A.; Kim, D.-W.; Fragos, T.; Kundu, A.; King, A.R.; Pellegrini, S.; Trinchieri, G.; Zepf, S.; Wright, N.J. (2012-08-20)
      We report the spectral and temporal variability properties of 18 candidate transient (TC) and potential transient (PTC) sources detected in deep multi-epoch Chandra observation of the nearby elliptical galaxies, NGC3379, ...

    • Transient Low-mass X-ray Binary Populations in Elliptical Galaxies NGC 3379 and NGC 4278 

      Fragos, T.; Kalogera, V.; Willems, B.; Belczynski, K.; Fabbiano, G.; Kim, D.-W.; Brassington, Nicola; Angelini, L.; Davies, R. L.; Gallagher, J.S.; King, A.R.; Pellegrini, S.; Trinchieri, G.; Zepf, S.E.; Zezas, A. (2009-09-01)
      We propose a physically motivated and self-consistent prescription for the modeling of transient neutron star low-mass X-ray binary (LMXB) properties, such as duty cycle (DC), outburst duration, and recurrence time. We ...

    • The X-ray spectra of the luminous LMXBs in NGC 3379 : field and globular cluster sources 

      Brassington, Nicola; Fabbiano, G.; Blake, S.; Zezas, A.; Angelini, L.; Davies, R. L.; Gallagher, J.; Kalogera, V.; Kim, D. -W.; King, A. R.; Kundu, A.; Trinchieri, G.; Zepf, S. (2010-12)
      From a deep multi-epoch Chandra observation of the elliptical galaxy NGC 3379 we report the spectral properties of eight luminous LMXBs (L-X > 1.2 x 10(38) erg s(-1)). We also present a set of spectral simulations, produced ...