Star Formation in NGC 1187

Minimum credit line: Image courtesy of NRAO/AUI and A. C. Boley and L. van Zee, Indiana University; D. Schade and S. Côté, Herzberg Institute for Astrop(for details, see Image Use Policy).

About this Image

Where does global star formation end in spiral galaxies? The above multi-wavelength image of NGC1187 combines H alpha emission (red), visible light in the R-band (white), and HI 21cm gas emission (blue). The H alpha and R-band data were obtained with the WIYN 3.5m, while the HI data were obtained with the Very Large Array. Each wavelength probes a different aspect of the galaxy; the H alpha emission traces recent star formation, the visible light traces past star formation, which is now seen as the old stellar disk, and the HI emission indicates where there is fuel for creating new stars.

Investigator(s):  L. van Zee, D. Schade, S. Côté

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Technical Data

    Telescope VLA 
    Date of Observation 2001-10-08 
    Type of Observation Spectral Line Observations 
    Center of Image RA: 03:02:38.00, Dec: -22:51:33.00 (J2000)  
    Field of View 0.1250 x 0.1250 degrees  
    Technical Caption Narrowband H alpha emission and continuum, R-band, and HI 21 cm line emission are combined in the above RGB image to show star formation, the stellar disk, and HI. The H alpha and R-band data were obtained with the WIYN 3.5m. The images represent a total integration time of 6000 seconds for the OFF- band, 7200 seconds for the ON-band, and 360 seconds for the R-band exposures. The seeing for each exposure is about 1.1, 1.1, 0.95 arcseconds respectively. The HI data were obtained with the VLA in DnC configuration, 380 minutes on source, with a beam size of 40.9x28.6 arcseconds.  

  • Astronomical database entries for NGC 1187
    • Query NED for images of NGC 1187
    • Query SIMBAD for more NGC 1187 data


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