Correlations and periodicities of equivalent widths in SS 433

Details Correlations and periodicities of equivalent widths in SS 433 Correlations and periodicities of equivalent widths in SS 433

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26as...53..109v&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 53, July 1983, p. 109-117. Research supported by the Consigl

Astronomy and Astrophysics

Astrophysics

5

Binary Stars, Radio Stars, Spectral Line Width, Stellar Spectra, Variable Stars, X Ray Sources, Data Processing, H Alpha Line, Stellar Evolution, X Ray Stars

Scientific paper

A significant part of the spectrograms of SS 433 (= V 1343 Aquilae), obtained at the Asiago Observatory during the years 1978-81, has been reduced from density to exposure through the ELSPEC package. In the calibrated spectra relevant parameters have been deduced for the emission lines in both the rest and moving systems. A list of equivalent widths is presented for these features, indicating for them a large range of erratic variability also during the same night. H-alpha and other lines are shown to change through the precessional period of 163 days. On the other hand, no definite trend is observed through the 13.08-day orbital period, nor through the 6.28-day modulation period. A secular variation during the whole examined time interval is also described.

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