SFO 75 - The Coffee Bean Nebula


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By
Catalog
Obj Type
Location
Date Taken:
Harvey
N/A - Unknown
Nebula
CTIO, Chile
04-11-2008
Description

SFO 75 (RCW 98), the Coffe Bean Nebula,  is a Bright Rimmed Cloud (BRC) from the Sugatani, Fukui, & Ogura catalog.  It is a ring type nebula centered on a Wolf-Rayert star.  Radio telescope observations reveal the presence of a dense core embedded within each cloud, and the presence of a layer of hot ionised gas coincided with their bright-rims. The ionised gas has electron densities significantly higher than the critical density above which an ionised boundary layer can form and be maintained, strongly supporting the hypothesis that these clouds are being photoionised by the nearby OB star(s).  This radiation driven implosion promotes abundant star formation.

Technical Details
Exposure Time:
HaRGB with 3 hours of Ha and 1 hour for each color
Camera:
Apogee Alta U47
Telescope:
RCOS Carbon Truss 16 inch f/11.3 Ritchey-Chretien
Mount:
Software Bisque Paramount ME
© 2019 Harvey
Used with permission, No reproduction of these images are permitted without written approval from Harvey.