HI + Optical Image of the Integral Sign Galaxy (UGC 3697)

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About this Image

Composite image of the "Integral Sign'' galaxy, UGC 3697. This edge-on spiral galaxy displays an unusually pronounced warp in both its stellar and gaseous disks. The neutral Hydrogen gas, represented in blue, is overlaid on an optical image of the stellar component of the galaxy. Unlike in normal spiral galaxies, the brightest concentration of neutral Hydrogen is not found near the center of UGC 3697 but along its western edge, where the VLA has detected a bright, extended region of emission in the midplane. In addition, plumes of gas extend to considerable height above and below the disk of the galaxy.

Investigator(s):  L. D. Matthews (CfA), J. M. Uson (NRAO)

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Technical Data

    Telescope VLA 
    Date of Observation 2000-05-28 
    Type of Observation Spectral Line Observations 
    Wavelength 21 cm 
    Frequency 1420.4 MHz 
    Species HI 
    Center of Image RA: 07:11:22.50, Dec: 71:50:10.00 (J2000)  
    Field of View 0.1642 x 0.1642 degrees  
    Technical Caption VLA observation: 12 hours in C configuration with a spectral resolution of 5.2 km/s. WIYN observations: 2 x 12.5 minutes with Harris B and R filters.  

  • Astronomical database entries for UGC3697
    • Query NED for images of UGC3697
    • Query SIMBAD for more UGC3697 data


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