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COMMISSION 27 of the I.A.U. INFORMATION BULLETIN on VARIABLE STARS Nos. 3001

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COMMISSION 27 OF THE I.A.U. INFORMATION BULLETIN ON VARIABLE STARS Nos. 3001 - 3100 1987 March - 1987 October EDITORS: L. SZABADOS and B. SZEIDL KONKOLY OBSERVATORY H-1525 BUDAPEST P.O. Box 67, HUNGARY HU ISSN 0374 - 0676 CONTENTS 3001 PHOTOELECTRIC ELEMENTS AND REVISED SPECTRAL TYPES OF XX Cas R.K. Srivastava 18 March 1987 3002 HR 2554 - A POSSIBLE NEW Zeta Aur SYSTEM Thomas B. Ake, S.B. Parsons 19 March 1987 3003 53 PISCIUM - LARGER AMPLITUDE Marek Wolf 23 March 1987 3004 OBSERVATIONS AND A TIME OF MINIMUM OF TV Cet Daniel B. Caton, R. Lee Hawkins 25 March 1987 3005 ON THE PRIMARY MINIMUM OF ECLIPSING BINARY AY Cam J.B. Srivastava, C.D. Kandpal 30 March 1987 3006 AN UNEXPECTEDLY EARLY FADING OF V644 Cen (CPD -60d3278) J.K. Davies, A. Evans, M.F. Bode, D.C.B Whittet 3 April 1987 3007 PHOTOELECTRIC OBSERVATIONS OF TT ARIETIS ON 1/2 OCTOBER 1986 S. Rossiger 6 April 1987 3008 DELTA Cap: A POSSIBLE RS CVn BINARY R.K. Srivastava 9 April 1987 3009 ON THE CONSTANCY OF SOME STARS IN NGC 2287 = MESSIER 41 Brian A. Skiff 13 April 1987 3010 AN IMPROVEMENT OF THE ROTATIONAL PERIOD OF CQ UMa Zdenek Mikulasek 16 April 1987 3011 CORRECT PERIOD OF THE ECLIPSING STAR MN AURIGAE H. Gessner 16 April 1987 3012 JHK LIGHT CURVES OF CG CYGNI J.K. Davies, D.K. Bedford, J.J. Fuensalida, M.J. Arevalo 17 April 1987 3013 OPTICAL BEHAVIOUR OF THE X-RAY BINARY V1727 CYGNI = 4U 2129+47 IN 1986 W. Gotz 17 April 1987 3014 PHOTOGRAPHIC OBSERVATIONS OF THE PLANETARY NEBULA PK 215 +3d1 Hao Xiang-Liang 21 April 1987 3015 HQ AND HV ANDROMEDAE: FURTHER PHOTOMETRIC STUDY OF POLAR CANDIDATES I.L. Andronov, L. Meinunger 21 April 1987 3016 PHOTOELECTRIC OBSERVATIONS OF THE FLARE STAR EV Lac IN 1983 S. Avgoloupis, L.N. Mavridis, P. Varvoglis 23 April 1987 3017 1983/84 PHOTOMETRY OF THE SPOTTED STAR V711 TAURI (HR 1099) Scott W. Wacker, E.F. Guinan 26 April 1987 3018 1985/86 PHOTOMETRY OF THE RS CVn BINARY UX ARIETIS Scott W. Wacker, E.F. Guinan 26 April 1987 3019 EARLY UBV PHOTOMETRY OF SUPERNOVA 1987A IN LMC Thilo Gunter 4 May 1987 3020 PHOTOELECTRIC PHOTOMETRY OF Rho CASSIOPEIAE P. Steven Leiker, D.B. Hoff 5 May 1987 3021 H-ALPHA OBSERVATIONS OF W UMa (BD +56d1400) B.M. Davan 7 May 1987 3022 PHOTOMETRIC OBSERVATIONS OF WR78 = HD 151932 P. Magain, J.M. Vreux, J. Manfroid 11 May 1987 3023 THE PROPER MOTION OF THE AGK3 VARIABLE STARS, IV WY Cyg - YY Cyg - R Lac Carlos E. Lopez, J.G. Sanguin 13 May 1987 3024 NEW BRIGHTENING OF SUGANO'S OBJECT IN ORION ASSOCIATION K.G. Gasparian, G.B. Oganian, E.S. Parsamian 15 May 1987 3025 NO PERIODICITY IN RZ GRUIS Bradley E. Schaefer, J. Patterson 18 May 1987 3026 A NEW LONG-PERIOD CEPHEID IN THE LMC A.M. van Genderen, Th. Augusteijn, J.J. Prein, E.C. Engelsman, E. van der Grift 25 May 1987 3027 PHOTOMETRIC BEHAVIOUR OF THE SUSPECTED PROGENITOR OF SUPERNOVA 1987A ON PLATES OF SONNEBERG OBSERVATORY B. Fuhrmann 29 May 1987 3028 PHOTOELECTRIC PHOTOMETRY OF HD 33798 Aaron J. Spurr, D.B. Hoff 1 June 1987 3029 NEW ECLIPSE TIMING OF AS CAMELOPARDALIS FROM THE IUE SATELLITE Edward F. Guinan, F.P. Maloney, P.T. Boyd 3 June 1987 3030 SIX NEW VARIABLE STARS IN THE CONSTELLATION OF SAGITTARIUS Joaquin Campos, A. Sanchez 5 June 1987 3031 SPOT OBSERVATIONS OF EV Lac Scot J. Kleinman, W.H. Sandmann, C.W. Ambruster 5 June 1987 3032 AUTUMN 1981 PHOTOMETRY OF THE RS CVn BINARY II PEGASI Scott W. Wacker, E.F. Guinan, G.P. McCook, B.G. Paczkowski, J.C. Lochner 8 June 1987 3033 B, V, R, I LIGHT CURVES OF AD CANCRI Ronald G. Samec, B.B. Bookmyer 10 June 1987 3034 THE 1986 LIGHT CURVE OF II Peg G. Cutispoto, G. Leto, I. Pagano, G. Santagati, R. Ventura 12 June 1987 3035 VARIABILITY OF SOME S! STARS M. Huruhata 17 June 1987 3036 INSTABILITIES IN THE LIGHT CURVE OF THE RR LYRAE STAR SS Leo I. Skillen, J.A. Fernley, D. Kilkenny 22 June 1987 3037 PHOTOELECTRIC OBSERVATIONS OF EX HYDRAE DURING THE 1986 JULY - AUGUST OUTBURST I. Bond, R.V. Freeth, B.F. Marino, W.S.G. Walker 24 June 1987 3038 POSITIONS AND PROPER MOTIONS OF THREE NOVAE M. Geffert, A. Barteldrees, B.-C. Kamper, A. Peters, H.-P. Schmitz, H. Weiland, D. Warnke 26 June 1987 3039 SOME NEW POSSIBLE VARIABLE STARS II. E.M. Halbedel 29 June 1987 3040 TIMES OF MINIMUM LIGHT FOR U CEPHEI IN 1986 Fumio Sato, A. Nishimura 30 June 1987 3041 UBV PHOTOMETRY OF Epsilon AURIGAE OUTSIDE ECLIPSE Fumio Sato, A. Nishimura 30 June 1987 3042 1986 LIGHT CURVE OF V711 Tau M.V. Mekkaden 3 July 1987 3043 PHOTOMETRY DURING THE END-PHASE OF A SPOT CYCLE IN II Peg M.V. Mekkaden 3 July 1987 3044 11 NEW VARIABLES IN GLOBULAR CLUSTER M5 A. Geraschenko 7 July 1987 3045 OPTICAL BEHAVIOUR OF THE X-RAY SOURCE EXO 020528+1454.8 IN THE SEASON 1986/87 W. Gotz 7 July 1987 3046 UBV PHOTOMETRY OF NOVA ANDROMEDAE 1986 Giannantonio Milani, A. Tonello, G. Favero 13 July 1987 3047 EMISSIONS OBSERVED ON OBJECTIVE-PRISM SPECTROGRAMS Tsvetanka Radoslavova 14 July 1987 3048 PX Cep: A NEW LARGE AMPLITUDE ECLIPSING BINARY R. Boninsegna 14 July 1987 3049 REQUEST FOR VRI PHOTOMETRY OF THE RS CVn TYPE BINARY HD 26337 DURING 15. THROUGH 30. DECEMBER 1987 Klaus G. Strassmeier 16 July 1987 3050 FLARES OF HD 97766 Zhang Zhousheng, Li Yulan, Wang Xunhao 20 July 1987 3051 VRI PHOTOMETRY OF LMC SN 1987A K.E. Rangarajan, K. Jayakumar, M. Appakutty, H.D. Sheriff 21 July 1987 3052 VARIABLE SHELL STRENGTH OF PLEIONE (BU Tau) P.S. Goraya, N.S. Tur, B.S. Rautela 27 July 1987 3053 B, V, R, I OBSERVATIONS OF CE LEONIS Ronald G. Samec, B.B. Bookmyer 28 July 1987 3054 A POSSIBLE NEW BINARY STAR IN SAGITTARIUS Jose H. Pena, J. Campos, R. Peniche 29 July 1987 3055 UBV PHOTOMETRIC OBSERVATIONS OF DY PEGASI Hamed A. Mahdy 29 July 1987 3056 RECENT ONSET OF AN OUTBURST IN Mu CENTAURI K.K. Ghosh, C. Velu, K. Kuppuswamy, K. Jaykumar, M.J. Rosario 3 August 1987 3057 DETECTION OF A NEW Be STAR - Gamma Lup K.K. Ghosh, K. Kuppuswamy, K. Jaykumar, M.J. Rosario, C. Velu 3 August 1987 3058 THE 68th NAME-LIST OF VARIABLE STARS P.N. Kholopov, N.N. Samus', E.V. Kazarovets, N.N. Kireeva 5 August 1987 3059 B, V PHOTOMETRY OF ER VULPECULAE M.C. Akan, C. Ibanoglu, Z. Tunca, S. Evren, V. Keskin 7 August 1987 3060 THE 1986 LIGHT CURVES OF UV PISCIUM V. Keskin, M.C. Akan, C. Ibanoglu, Z. Tunca, S. Evren 7 August 1987 3061 HD 185510: A CALCIUM-EMISSION BINARY WITH ECLIPSES OF A SUBDWARF COMPANION L.A. Balona, T. Lloyd Evans, T. Simon, G. Sonneborn 10 August 1987 3062 SPECTRUM OF THE RECENT NOVAE: NOVA ANDROMEDAE 1986 AND NOVA CENTAURI 1986 B.N. Ashoka 11 August 1987 3063 McNAUGHT'S VARIABLE AT 7h 23m -03d IS A MIRA STAR W. Wenzel 11 August 1987 3064 TIME-EVOLUTION OF COLOURS OF TWO EV Lac FLARES K.P. Panov, T. Korhonen 11 August 1987 3065 THE OPTICAL BEHAVIOUR OF KR AURIGAE IN THE SEASON 1986/87 W. Gotz 12 August 1987 3066 OPTICAL BEHAVIOUR OF AT CANCRI IN THE SEASON 1986/87 W. Gotz 12 August 1987 3067 OPTICAL BEHAVIOUR OF THE POLAR ST LEONIS MINORIS = CW 1103 + 254 IN THE SEASON 1986/87 W. Gotz 12 August 1987 3068 PHOTOMETRIC OBSERVATIONS OF THE AM HERCULIS SYSTEM MR SERPENTIS; PG 1550+191 C. la Dous, R. Schoembs 17 August 1987 3069 FLARES ON AD Leo IN 1973 AND 1983 Richard B. Herr, D.B. Opie 17 August 1987 3070 TIME OF MINIMUM DETERMINATION OF THE ECLIPSING BINARY V1143 CYGNI Edward F. Guinan, S.-I. Najafi, F. Zamani-Noor, P.T. Boyd, S.M. Carroll 19 August 1987 3071 VARIABILITY OF NSV 01715 M. Huruhata 24 August 1987 3072 COLORIMETRIC OBSERVATIONS OF Y Ori N.D. Melikian, R.Sh. Natsvlishvili, M. della Valle 25 August 1987 3073 NEW Halpha-EMISSION STARS IN THE REGIONS NGC 7000, IC 5068 AND IC 5070 N.D. Melikian, V.S. Shevchenko, S.Ju. Melnikov 25 August 1987 3074 HYDROGEN EMISSIONS ON LOW-DISPERSION SPECTROGRAMS OF B-STARS Tsvetanka Radoslavova 25 August 1987 3075 PHOTOELECTRIC OBSERVATIONS OF THE SYMBIOTIC BINARY EG ANDROMEDAE R. Luthardt 26 August 1987 3076 PHOTOMETRY OF SUPERNOVA 1987A A.H. Jarrett 26 August 1987 3077 IMPORTANT PARAMETERS OF FOUR SMALL-AMPLITUDE CEPHEIDS FROM uvby PHOTOMETRY A. Arellano Ferro, S. Giridhar, L. Parrao 27 August 1987 3078 PHOTOELECTRIC MINIMA OF ECLIPSING BINARIES E. Pohl, M.C. Akan, C. Ibanoglu, C. Sezer, N. Gudur 27 August 1987 3079 LET'S FORGET DO Dra Joseph Patterson, N. Eisenman 31 August 1987 3080 NEW UBV PHOTOELECTRIC OBSERVATIONS OF GZ And Liu Xuefu, Yang Jing, Tan Huisong 31 August 1987 3081 PHOTOMETRIC STUDY OF THE BLUE VARIABLES IW, IZ AND IO ANDROMEDAE L. Meinunger, I.L. Andronov 3 September 1987 3082 ON THE POSSIBLE NOVA OF SOLOVYOV Bradley E. Schaefer 4 September 1987 3083 THE ECLIPSE OF THE LONG PERIOD ECLIPSING BINARY 32 CYGNI IN 1987 D. Bohme 7 September 1987 3084 PHOTOMETRIC BEHAVIOUR OF DR TAURI IN THE SEASON 1986/87 W. Gotz 9 September 1987 3085 UBV PHOTOMETRY OF THE R CORONAE BOREALIS STAR RY Sgr - 1984 TO 1986 W.A.
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  • Wind Mass Transfer in S-Type Symbiotic Binaries III. Confirmation of a Wind

    Wind Mass Transfer in S-Type Symbiotic Binaries III. Confirmation of a Wind

    Astronomy & Astrophysics manuscript no. 39103 ©ESO 2020 December 16, 2020 Wind mass transfer in S-type symbiotic binaries⋆ III. Confirmation of a wind focusing in EG Andromedae from the nebular [O iii] λ5007 line N. Shagatova1, A. Skopal1, S. Yu. Shugarov1, 2, R. Komžík1, E. Kundra1, and F. Teyssier3 1 Astronomical Institute, Slovak Academy of Sciences, 059 60 Tatranská Lomnica, Slovakia e-mail: [email protected] 2 P.K. Sternberg Astronomical Institute, M.V. Lomonosov Moscow State University, Russia 3 Observatoire Rouen Sud (FR) - ARAS group, 76100 Rouen, France Received / Accepted ABSTRACT Context. The structure of the wind from the cool giants in symbiotic binaries carries important information for understanding the wind mass transfer to their white dwarf companions, its fuelling, and thus the path towards different phases of symbiotic-star evolution. Aims. In this paper, we indicate a non-spherical distribution of the neutral wind zone around the red giant (RG) in the symbiotic binary star, EG And. We concentrate in particular on the wind focusing towards the orbital plane and its asymmetry alongside the orbital motion of the RG. Methods. We achieved this aim by analysing the periodic orbital variations of fluxes and radial velocities of individual components of the Hα and [O iii] λ5007 lines observed on our high-cadence medium (R 11 000) and high-resolution (R 38 000) spectra. Results. The asymmetric shaping of the neutral wind zone at the near-orbital-plane∼ region is indicated by: (i)∼ the asymmetric course of the Hα core emission fluxes along the orbit; (ii) the presence of their secondary maximum around the orbital phase ϕ = 0.1, which is possibly caused by the refraction effect; and (iii) the properties of the Hα broad wing emission originating by Raman scattering on H0 atoms.
  • From Massive Stars to Supernovae

    From Massive Stars to Supernovae

    ISSN 1783-3426 THE MASSIVE STAR NEWSLETTER formerly known as the hot star newsletter * No. 151 2016 January-February Editors: Philippe Eenens (University of Guanajuato) [email protected] Raphael Hirschi (Keele University) http://www.astroscu.unam.mx/massive_stars CONTENTS OF THIS NEWSLETTER: News Obituaries Paul Kunasz and David Hummer Fizeau exchange visitors program Abstracts of 18 accepted papers Classical Oe Stars in the Field of the Small Magellanic Cloud An Apparent Precessing Helical Outflow from a Massive Evolved Star: Evidence for Binary Interaction A Comprehensive Comparative Test of Seven Widely-Used Spectral Synthesis Models Against Multi- Band Photometry of Young Massive Star Clusters Modeling X-ray emission line profiles from massive star winds – A review Long-Wavelength, Free-Free Spectral Energy Distributions from Porous Stellar Winds The Runaways and Isolated O-Type Star Spectroscopic Survey of the SMC (RIOTS4) Eta Carinae's Thermal X-ray Tail Measured with XMM-Newton and NuSTAR Stellar modelling of Spica, a high-mass spectroscopic binary with a beta Cep variable primary component Observational signatures of past mass-exchange episodes in massive binaries: The case of HD149404 The Galactic O-Star Spectroscopic Survey (GOSSS). III. 142 additional O-type systems Probing the Dragonfish star-forming complex: the ionizing population of the young massive cluster Mercer 30 Short-term variability and mass loss in Be stars I. BRITE satellite photometry of eta and mu Centauri Luminous blue variables: An imaging perspective on their binarity and near environment OB stars at the lowest Local Group metallicity. GTC-OSIRIS observations of Sextans A Herschel observations of the nebula M1-67 around the Wolf-Rayet star WR 124 The Massive Stellar Population of W49: A Spectroscopic Survey Line-driven ablation of circumstellar disks: I.
  • The Search for the Elusive Companion of EG Andromedae

    The Search for the Elusive Companion of EG Andromedae

    The Search for the Elusive Companion of EG Andromedae Joseph E. Pesce and Robert E. Stencel Center for Astrophysics and Space Astronomy University of Colorado Boulder, CO 80309-0391 USA and Nancy A. Oliversen Computer Sciences Corporation Greenbelt, Maryland USA Abstract: We report observations at opposite quadratures of the interacting symbiotic binary EG Andromedae (HD 4174, Period = 470d). Correcting for absolute motion at the system, it appears that many of the nebular lines arise from material that moves with the red giant star. The He II feature appears to track the hot component. It may be possible to use this feature in other, similar systems in order to "pin-down" the mass ratio. The optical spectrum of EG Andromedae was first noted by Wilson (1950) to consist _1 of a high velocity (vr= -96 km s : Oliversen et al, 1985) M2 giant upon which were superposed the optical emission lines of 0 III] and the Balmer series. The ultraviolet spectrum exhibits a far UV continuum and emission lines of C IV, He II, 0 III] and other species. The companion star is thought to be similar to the central star of a planetary nebula (Kenyon 1983). Oliversen et al (1985) have used the spectroscopic motion of the red giant features and an estimate of the mass of the hot object (0.7 M©) to approximate the mass ratio of about 3.5. Oliversen et al report that the red giant optical absorption features undergo an esti­ mated 15 km s_1 total velocity excursion between orbital quadratures. With a mass ratio of 3.5, we predict that the hot object should exhibit 53 km s_1 in spectral line displace­ ment.