WeBo 1 and the heart of the Heart Nebula in Ha

            While imaging the Heart Nebula for the third time, I noticed a new detail while processing the Ha data -- the planetary nebula WeBo 1 (also known as PN G135.6+01.0).  This planetary nebula {PN) is located about 5,000 ly away in the constellation Cassiopeia.  The PN is about 1 arc-minute wide (the full moon is 30 arc minutes wide), corresponding to a length of 1.5 ly.  We are seeing the PN from an almost edge-on perspective, so the circular ring around the central star appears elliptical.  
The central star has been determined spectroscopically to be a barium star.  Barium stars are spectral class G to K stars whose spectra indicate an overabundance of slow neutron-capture process (s-process) elements by the presence of singly ionized barium.  The s-process is responsible for the creation of approximately half the atomic nuclei heavier than iron. 
Observational studies suggest that all barium stars are binary stars.  This PN's barium star's companion is a white dwarf and is no longer visible to us.  This binary system has a 5-day rotation period.  This binary rotation led to the Ha gas being preferentially ejected in an orbital plane rather than a sphere, so WeBo 1 is surrounded by a ring of gas instead of a sphere.

WeBo 1 was first identified in 1995 on Digitized Sky Survey images.

Rio Rancho NM  Bortle 5 zone, 
Oct 26-28, 2023 
William Optics Redcat 51
ZWO 183mm pro
ZWO 30mm f/4 mini guide scope and ZWO 120 Mini
ZWO ASI Air Pro
Sky-Watcher HEQ5
272 X 300s Ha
Darks flats dithering GraXpert
Gain 111 at -10C
Processed in DSS and PS


   

Taken on: October 28, 2023

Tags:

Astrophotography

astronomy

HII

IC 1805

Heart Nebula « less

Sets appears in: • Astrophotography

Groups appears in: • Astrophotography - Astronomy - Astrophysics • Astronomy more » • Deep Space Astrophotography • astrometry • William Optics • Backyard Astrophotography • Amateur Astro-Photography • Night Photography and Long Exposure • ZWO ASI Astronomy • The Sky Above (Astrophotography) « less

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