Skip to main content

8 Result(s)

within D. Fraix-Burnet Remove this filter

and

  1. No Access

    Chapter and Conference Paper

    Clustering of Galaxy Spectra: An Unsupervised Approach with Fisher-EM

    We present a novel approach to galaxy spectra classification using Fisher-EM, a latent subspace clustering and Gaussian mixture model based algorithm. This approach was applied to a sample of 10,000 simulated ...

    J. Dubois, D. Fraix-Burnet, J. Moultaka in Machine Learning for Astrophysics (2023)

  2. No Access

    Chapter and Conference Paper

    First AMBER/VLTI Observations of Hot Massive Stars

    AMBER is the first near infrared focal instrument of the VLTI. It combines three telescopes and produces spectrally resolved interferometric measures. This paper discusses some preliminary results of the first...

    R. G. Petrov, F. Millour, O. Chesneau… in The Power of Optical/IR Interferometry: Re… (2008)

  3. No Access

    Article

    The central dusty torus in the active nucleus of NGC 1068

    Active galactic nuclei (AGNs) display many energetic phenomena—broad emission lines, X-rays, relativistic jets, radio lobes—originating from matter falling onto a supermassive black hole. It is widely accepted...

    W. Jaffe, K. Meisenheimer, H. J. A. Röttgering, Ch. Leinert, A. Richichi… in Nature (2004)

  4. No Access

    Chapter and Conference Paper

    Relativistic Electron-Positron Clouds in VLBI Jets

    Extragalactic jets have always had two characteristics: the presence of knots and the requirement for particle acceleration. Shock fronts provide an explanation for both. However, the knotty appearance is less...

    V. Despringre, D. Fraix-Burnet in Extragalactic Radio Sources (1996)

  5. No Access

    Chapter and Conference Paper

    First Millimeter Map** of the Jet and Nucleus of M87

    An intriguing question about extragalactic jets is why they are so few being seen at optical wavelengths, or equivalently, why the cutoff frequency of the synchrotron radiation is generally not in the optical,...

    V. Despringre, D. Fraix-Burnet in Extragalactic Radio Sources (1996)

  6. No Access

    Article

    A counterjet in the elliptical galaxy M87

    JETS in radio galaxies have a variety of observed morphologies, in particular appearing in both one-sided and two-sided forms. It is not known whether jets can be intrinsically one-sided, or if the one-sided a...

    William B. Sparks, D. Fraix-Burnet, F. Macchetto, F. N. Owen in Nature (1992)

  7. No Access

    Chapter and Conference Paper

    Nuclear Dust-Discs in Radio Ellipticals

    As part of the ESO Key Program “Towards a Physical Classification of Galaxies”, Bender et al., NTT images using narrow-band and broad-band filters are being obtained. The exceptional seeing (0.7–1.0 arcsec) ha...

    W. B. Sparks, F. Macchetto, D. Fraix-Burnet… in Morphological and Physical Classification … (1992)

  8. No Access

    Chapter and Conference Paper

    Extended Hα Filaments in Elliptical Galaxies

    We have undertaken a statistical observational study of elliptical galaxies with narrow band imaging, in order to investigate possible correlations between the presence of extended Hα filaments and the activit...

    D. Fraix-Burnet, F. Macchetto, W. Sparks in Morphological and Physical Classification … (1992)