A pair of leading spiral arms in a luminous infrared galaxy?
arXiv:0810.3991 · doi:10.1086/595728
Abstract
Leading spiral arms are a rare phenomenon. We present here one of the very few convincing candidates of spiral arms opening counter-intuitively in the same direction as the galaxy disk is rotating. This detection in a luminous IR galaxy (LIRG) IRAS 18293-3134 is based on near infrared (NIR) adaptive optics imaging with the Very Large Telescope and long-slit NIR spectroscopy with the Anglo-Australian Telescope. We discuss the orientation of the galaxy based on imaging and derive rotation curves from both emission and absorption features in the spectrum. The galaxy is strongly star-forming and has a minor companion in a high-velocity encounter. The fact that the arms of IRAS 18293-3134 are not easily traceable from optical images suggests that larger samples of high-quality NIR imaging of interacting systems and LIRGs might uncover further cases of leading arms, placing constraints on spiral arm theories and retrograde encounters, and especially on the relationship between disk masses and dark matter halo masses.
Accepted for publication in Astrophysical Journal Letters. 13 pages, 4 figures
References in corpus (7)
- The Universal Rotation Curve of Spiral Galaxies. II The Dark Matter Distribution out to the Virial Radius
- Equal- and unequal-mass mergers of disk and elliptical galaxies with black holes
- Adaptive Optics Discovery of Supernova 2004ip in the Nuclear Regions of the Luminous Infrared Galaxy IRAS 18293-3413
- NGC5719/13: interacting spirals forming a counter-rotating stellar disc
- Adaptive optics imaging and optical spectroscopy of a multiple merger in a luminous infrared galaxy
- Radio Detection of Supernova 2004ip in the Circumnuclear Region of the Luminous Infrared Galaxy IRAS 18293-3413
- The polar ring galaxy AM1934-563 revisited
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