Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.1304u&link_type=abstract
American Astronomical Society, AAS Meeting #211, #13.04; Bulletin of the American Astronomical Society, Vol. 39, p.755
Astronomy and Astrophysics
Astronomy
Scientific paper
We have obtained new observations of UGC3697, the "Integral-Sign" galaxy. Spectral synthesis observations of neutral hydrogen (HI) with the VLA at a resolution of 12" show that the galaxy is located in a small group in which we detect hydrogen emission from eight distinct galaxies. We have obtained as well VRI wide-field observations with the Palomar Observatory 60" telescope and B, R, and H-alpha imaging with the WIYN telescope. UGC3697 is a low-mass, Sd spiral galaxy whose stellar disk exhibits a "superthin" yet highly warped structure with no spheroidal component and no visible dust lane. The warp is shared by the neutral and ionized gaseous components. The kinematic properties that follow from the HI observations show the remnants of a recent merger that provides a straightforward explanation for the properties of this galaxy, especially the contrast between its rather thin disk and the pronounced warp. We believe that the present state must be rather short-lived and the galaxy will soon undergo significant structural changes.
Matthews Lynn Diane
Uson Juan M.
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