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Pulsating AGB star in the symbiotic nova PU Vulpeculae
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| The Henry Draper Extension Charts: A catalogue of accurate positions, proper motions, magnitudes and spectral types of 86933 stars
The Henry Draper Extension Charts (HDEC), published in the form offinding charts, provide spectral classification for some 87000 starsmostly between 10th and 11th magnitude. This data, being highlyvaluable, as yet was practically unusable for modern computer-basedastronomy. An earlier pilot project (Roeser et al. 1991) demonstrated apossibility to convert this into a star catalogue, using measurements ofcartesian coordinates of stars on the charts and positions of theAstrographic Catalogue (AC) for subsequent identification. We presenthere a final HDEC catalogue comprising accurate positions, propermotions, magnitudes and spectral classes for 86933 stars of the HenryDraper Extension Charts.
| Photometry of symbiotic stars - an international campaign.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1991CoSka..21..303H&db_key=AST
| Spectral variation and the expanding envelope of PU Vulpeculae
The peculiar variable star PU Vul showed significant spectral changes in1982. The mean radial velocity of absorption lines changed from +30 km/sin May to -50 km/s in November. Strong emission lines with P Cygniprofile of H-alpha, Fe I, Fe II, Ca I, Ba II, Sc II, and La II weredetected on a high-dispersion spectrum taken in November, 1982. The meanradial velocity of the emission lines in the spectrum is about +30 km/s.The blue shift of the absorption lines and the emergence of the emissionlines suggest the presence of an expanding envelope. This objectprobably entered an active period in 1982. Some points of similaritybetween PU Vul and the peculiar F-type supergiant Rho Cas are pointedout.
| Photoelectric Observations of the Symbiotic Stars Ch-Cygni Ag-Draconis and the Peculiar Object Pu-Vulpeculae during the Maximum of Their Activity in the Years 1981-1982
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1984CoSka..12..261C&db_key=AST
| UBV and Spectroscopic Observations of PU Vulpeculae
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| Photoelectric UBV Observations of PU Vul in 1982
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| Photoelectric UBV Observations of PU Vul in 1981
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| Photoelectric Observations of the Novalike Object in Vulpecula
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