The symbiotic star HD 4174
1980; IOP Publishing; Volume: 237; Linguagem: Inglês
10.1086/157930
ISSN1538-4357
Autores Tópico(s)Astronomical Observations and Instrumentation
Resumoview Abstract Citations (32) References (36) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The symbiotic star HD 4174. Smith, S. E. Abstract The paper discusses spectroscopic observations, covering the double gamma 5800-6700 region, of the symbiotic star HD 4174. Changes in the equivalent width, radial velocity, and line profile of H(alpha) were observed, and were found to be correlated with a derived pulsation period of 470 days. The data were most consistent with a binary model consisting of an M2 III semiregular variable and a hot secondary surrounded by a common envelope with a temperature of about 10,000 K and an electron density in the range of 0.4 to 3 x 10 to the 5th/cu cm. The circumstellar envelope was found to arise from a mass loss at a rate of about 3 x 10 to the -7th solar mass/yr, driven by isothermal pulsations from the M2 III primary. A weak blue-shifted component of the H(alpha) emission was explained in terms of a stellar wind from the hot component at about 150 km/sec. Publication: The Astrophysical Journal Pub Date: May 1980 DOI: 10.1086/157930 Bibcode: 1980ApJ...237..831S Keywords: Binary Stars; Spectrum Analysis; Stellar Models; Stellar Spectrophotometry; Variable Stars; Electron Density (Concentration); Gamma Rays; H Alpha Line; Line Spectra; Periodic Variations; Radial Velocity; Semiregular Variable Stars; Stellar Envelopes; Stellar Mass Ejection; Stellar Temperature; Stellar Winds; Astronomy full text sources ADS | data products SIMBAD (2)
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