COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS Number 2724 Konkoly Observatory Budapest 21 May 1985 HU ISSN 0374 - 0676 SPECTRA OF 10 SYMBIOTIC STARS The spectra were obtained in July and October 1982 using the D spectrograph at the Cassegrain focus of the 80 cm telescope at the Observatoire de Haute Provence. The spectra have a dispersion of 93 angstrom/mm for Hgamma. The spectrograph is equipped with an RCA tube, and the spectra were recorded on heated Kodak IIaO plates in the region lambda 3600 - 5200 angstrom. The exposure time for any given star in October was about twice as long as that used in July. We observed AG Peg, AG Dra and HBV 475 on 18th July 1982 only, AX Per and EG And on 26th October and MWC17 on 27th October 1982. The stars HM Sge, V 1016 Cyg, CI Cyg and Z And were observed both in July and in October using exposure times of the order of 30 minutes and 1 1/2 hours. The principal emission lines, together with the absorption bands which we detected in the ten spectra of symbiotic stars are presented in Tables I and II. Spectrophotometric analysis of these emissions and absorptions has yet to be performed. HM Sge, V1016 Cyg: Have similar spectra both in July and October 1982. The emission lines associated with these stars have already been identified by Mammano and Ciatti (1975). HBV 475 : We found fewer emission lines than in the two above mentioned stars. The forbidden lines are fewer in number. AX Per, AG Peg : These two stars have some features in common but only AG Peg has FeII and [FeII ] lines in emission. Z And : On the date of our observations the [OIII] nebular lines did not appear, whilst the TiO bands appeared stronger in July. Table I Emission lines in 1982 for 10 Symbiotic stars lambda (angstrom) Elements Identification of lines in these stars 3587 He I(31)+[Fe VII] (3F) V 1016 Cyg. 3784 H 13 V 1016 Cyg, Z And [Oct], AG Peg. 3760 [Fe VII] (3F) V 1016 Cyg, HM Sge AX Per, Z And, AG Peg, CI Cyg, HBV 475. 3770 H11 HM Sge V 1016 Cyg, AG Peg, detectable in CI Cyg (July) and Z And (October) 3798 H10 HM Sge, V 1016 Cyg, Z And, AG Peg and detectable in AX Per. 3835 H9 HM Sge, V 1016 Cyg, HBV 475, AG Peg, Z And, AX Per. 3869 [Ne III] (1F) HM Sge, V 1016 Cyg, CI Cyg, AX Per, very weak in AG Peg. 3889 H8 + HeI (2) Strong in the stars, weak in AG Dra, absent in EG And. 3970 Hepsilon + [Ne III]+Ca II Strong in the stars detectable in AG Dra, absent in EG And. 4026 He I (18) HM Sge, V 1016 Cyg, HBV 475, Z And, AG Peg, very weak in AX Per. 4045 Hg Atmospheric. 4069 [SII] (1F) HM Sge, V 1016 Cyg, MWC 17, CI Cyg (Oct.) 4076 [SII] (1F) HM Sge, V 1016 Cyg. 4102 Hdelta Present in the stars, except EG And, 4121 He I (16) Z And (Oct), AG Peg. Table I(cont.) 4144 He I (53) AG Peg, Z And (Oct.) 4179 Fe II (28) V 1016 Cyg, HBV 475, Z And, AG Peg, HM Sge. 4200 He II (3) V 1016 Cyg, HBV 475, Z And. 4233 Fe II (27) V 1016 Cyg, Z And, HBV 475, MWC 17. 4244 [Fe II] (21F) V 1016, Z And (July), MWC 17. 4276 [Fe II](7F) V 1016 Cyg. 4287 [Fe II](7F) V 1016 Cyg, MWC 17. 4340 Hgamma in each star except EG And. 4359 [Fe II](21F) + (7F) MWC 17. 4363 [O III] (2F) HM Sge, CI Cyg, V 1016 Cyg, HBV 475, AX Per, AG Peg. 4388 He I (51) AG Peg, Z And, HBV 475, CI Cyg (July) and detectable in AX Per. 4415 [Fe II] (6F) V 1016 Cyg, HM Sge, HBV 475, Z And, MWC 17, AG Peg. 4471 He I (14) HM Sge, V 1016 Cyg, HBV 475, AG Peg, Z And, CI Cyg, AX Per, MWC 17. 4491 Fe II (37) V 1016 Cyg, Z And, HBV 475, MWC 17. 4573 [Fe III] (3F) HM Sge, V 1016 Cyg. 4583 Fe II (37) + (38) HBV 475, Z And, MWC 17, V 1016 Cyg, AG Peg. 4629 Fe II (37) MWC 17. 4634 HM Sge, V 1016 Cyg, HBV 475, CI Cyg, stronger in July, Z And, AG Peg, 4640 N III (2) detectable in AX Per. 4650 C III (1) CI Cyg (July), HBV 475. 4658 [Fe III] (3F) HM Sge, V 1016 Cyg, MWC 17. 6686 He II (1) V 1016 Cyg, HM Sge, HBV 475, AG peg, Z And, AX Per, CI Cyg stronger in July, AG Dra. 4701 [Fe III] (3F) V 1016 Cyg, HM Sge. Table I (cont.) 4713 [Ne IV]+[A IV] (1F) HM Sge, V 1016 Cyg. 4713 He I (12) HBV 475, Z And (Oct.), AG Peg, AX Per, CI Cyg stronger in July. 4725 [Ne IV] (1F) HM Sge, V 1016 Cyg, AX Her. 4740 [A IV ](1F) HM Sge, V1016 Cyg. 4815 [Fe II] (20F) V 1016 Cyg. 4861 Hbeta; in each star including EG And. 4893 [Fe VII] (2F) V 1016 Cyg. 4906 [Fe IV]+[Fe II] (20F) V 1016 Cyg, HM Sge. 4922 He I (48) HBV 475, y 1016. Cyg, HM Sge, CI Cyg (July) Z And, AG Peg, AX Per, very weak in AG Dra. 4922 Fe II (42) MWC 17. 4942 [ Fe VII] (2F) V 1016 Cyg, HBV 475. 4959 [O III ] (1F) HM Sge, V 1016 Cyg, HBV 475, CI Cyg in July and October. 4969 [FeVI ] (2F) HM Sge, V 1016 Cyg. 4989 [FeVII] (2F) V 1016 Cyg. 5007 [ O III ] (1 F ) HM Sge, y 1016 Cyg, HBV 475, CI Cyg, AG Peg, MWC 17, AX Per. 5015 He I (4) HBV 475, C1 Cyg (July), Z And, AG Peg, AG Dra. He I (4)+Fe II (42) MWC 17. 5146 [ Fe VI] (2F) HM Sge, V 1016 Cyg. 5158 [FeVII](2F) V 1016 Cyg. 5177 [FeVI] (2F) HM Sge, V 1016 Cyg. Table II Absorption lines and bands in 1982 for 10 symbiotic stars lambda(angstrom) Elements Identification of lines and bands in these stars 4227 Ca I (2) EG And, AX Per, Z And (July), CI Cyg, stronger in October but wider in July. 3933 Ca II (1) HM Sge (Oct.), V 1016 Cyg (Oct.), AG Dra, MWC 17. 5166 Ti O (0-0) EG And, Z And stronger in July, HBV 475. 4955 Ti O (1-0) EG And, Z And stronger in July, AX Per, HBV 475. 4762 Ti O [2-Q) EG And, AX per, Z And stronger in July CI Cyg, discernible in AG Peg. 4588 Ti O (3-0) EG And, Z And stronger in July scarcely discernible in October, CI Cyg, HBV 475 discernible. 4462 Ti O (4-0) EG And, AX Per, perhaps in Z And (July). 4808 Ti O (3-1) EG And, AX Per, CI Cyg, Z And, stronger in July, discernible in AG Peg. 4300 CH (0-0) EG And, MWC 17, AG Dra, AG Peg. MWC 17 : Many FeII and [ FeII ] lines were seen from this star, HeII was absent. AG Dra : Few lines were seen, except for HI, HeI and HeII. EG And : The extremely weak emission spectrum is characterised only by Hbeta. In contrast, the absorption spectrum is very rich. CI Cyg : There were notable differences between the spectra obtained in July and October. The spectrum taken on 26th October 82 coincides with the eclipse of the hot star in the system, (Gunther and Schweitzer, 1983). The HeII line was much less intense in October than in July despite the fact that the October exposure was three times longer. In October, the nebular CIII line did not appear in the spectrum, nor did the singlet lines of HeI at 5015, 4922 and 4388 angstrom. M.T MARTEL and R. GRAVINA Observatoire de Lyon F-69230 Saint-Genis-Laval France References: Gunther, J. and Schweitzer, E., 1983, Bull. A.F.O.E.V. no 23, 12. Mammano, A. and Ciatti, F., 1975, Astron. and Astrophys., 39, 405. [BIBCODE 1975A&A....39..405M ]