D. Cieslinski et al., IDENTIFICATION OF DQ SERPENTIS AND DT SERPENTIS AS SYMBIOTIC STARS, Astronomy & Astrophysics. Supplement series, 124(1), 1997, pp. 57-60
Optical and near infrared spectroscopy of the stars DQ Ser and DT Ser
are presented. DQ Ser shows a late-type continuum (M3 - M5) with emiss
ion lines of Balmer series, HeI, HeII, [OIII], OI and Carl triplet whi
le DT Ser presents a earlier spectral type with emission of Balmer lin
es, HeI, HeII and [OIII]. DT Ser is a faint V = 15.4 star 5 arcsec fro
m a Tr = 12.8 G companion. We suggest it to be a yellow symbiotic star
.