The Bright Symbiotic Mira EF Aquilae
Bruce Margon, J. Xavier Prochaska, Nicolas Tejos, and TalaWanda Monroe
TL;DR
EF Aquilae is identified as a rare symbiotic Mira variable star, confirmed by its emission lines and UV detections indicating a hot companion, with photometric data supporting its Mira classification.
Contribution
This paper reports the first spectroscopic and UV evidence confirming EF Aquilae as a symbiotic Mira, a rare subclass of symbiotic stars.
Findings
Detection of [O III] emission indicating a symbiotic star
Strong UV detections from GALEX confirming a hot companion
Photometric data suggesting the cool component is a Mira variable
Abstract
An incidental spectrum of the poorly studied long period variable EF Aquilae shows [O III] emission indicative of a symbiotic star. Strong GALEX detections in the UV reinforce this classification, providing overt evidence for the presence of the hot subluminous companion. Recent compilations of the photometric behavior strongly suggest that the cool component is a Mira variable. Thus EF Aql appears to be a member of the rare symbiotic Mira subgroup.
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