SAURON dynamical modeling of NGC 2974
نویسندگان
چکیده
منابع مشابه
SAURON dynamical modeling of NGC 2974
NGC 2974 is a nearby field elliptical galaxy classified as E4 with detected HI and Hα gas apparently distributed in a disk (Kim et al. 1988; Buson et al. 1993). An earlier study by Cinzano & van der Marel (1994) suggested the galaxy harbors an embedded stellar disk not visible in the photometry. The galaxy was observed with the integral-field spectrograph SAURON (Bacon et al. 2001) mounted on t...
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We present Galaxy Evolution Explorer (GALEX) far (FUV) and near (NUV) ultraviolet imaging of the nearby early-type galaxy NGC 2974, along with complementary ground-based optical imaging. In the ultraviolet, the galaxy reveals a central spheroidlike component and a newly discovered complete outer ring of radius 6.2 kpc, with suggestions of another partial ring at an even larger radius. Blue FUV−...
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We study the large-scale stellar and gaseous kinematics of the E4 galaxy NGC 2974, based on panoramic integral-field data obtained with SAURON . We quantify the velocity fields with Fourier methods (kinemetry), and show that the large-scale kinematics is largely consistent with axisymmetry. We construct general axisymmetric dynamical models for the stellar motions using Schwarzschild’s orbit-su...
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We present H i observations of the elliptical galaxy NGC 2974, obtained with the Very Large Array. These observations reveal that the previously detected H i disc in this galaxy (Kim et al. 1988) is in fact a ring. By studying the harmonic expansion of the velocity field along the ring, we constrain the elongation of the halo and find that the underlying gravitational potential is consistent wi...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 2004
ISSN: 0074-1809
DOI: 10.1017/s0074180900183433