Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  NGC 3642
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NGC 3642 - Spiral with warped outer ring., astroeyes
NGC 3642 - Spiral with warped outer ring.
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NGC 3642 - Spiral with warped outer ring.

Getting plate-solving status, please wait...
NGC 3642 - Spiral with warped outer ring., astroeyes
NGC 3642 - Spiral with warped outer ring.
Powered byPixInsight

NGC 3642 - Spiral with warped outer ring.

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Description

NGC 3642 is a galaxy classified as type SBc. It has undergone some disturbance / interaction in the past and it now displays a warped outer ring undergoing star formation at 1.4 times the formation rate nearer the centre. (Verdes-Montenegro et.al. 2002). Distance is estimated to be about 79 Mly.

Our suggestion is that NGC 3642 has captured recently a low-mass, gas-rich dwarf, and star formation was triggered in this infalling external gas that produced also a pronounced warp in the gaseous disk.'

Magnitude 11.7, surface brightness is 14.9 (in magnitude per square arcminute).

Exposures 12 x 120 secs + 16 x 180secs. Image acquired in AstroArt3, processed in AA3 and PixInsight.

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  • NGC 3642 - Spiral with warped outer ring., astroeyes
    Original
  • Final
    NGC 3642 - Spiral with warped outer ring., astroeyes
    B

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NGC 3642 - Spiral with warped outer ring., astroeyes