PN A66 31
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TED91
moderator
"Abell31 (=SDSSJ0854+0853, PNG219.1+31.2) is a planetary nebula with a nearby (0.26′′) M-dwarf, both stars are most likely an associated wide binary" : DA white dwarfs in SDSS DR7 and a search for infrared excess emission
The binary fraction of planetary nebula central stars I. A high-precision, I-band excess search
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