منابع مشابه
Apsidal Motion Determination of the Eclipsing Binary Star V459 Cassiopeiae
Photometric and spectroscopic observations and analysis of the eccentric eclipsing binary V459 Cassiopeiae (e = 0.0244) were performed by Lacy et al. (2004). Observations of minimum light show the presence of apsidal motion. In order to find the observed rate of apsidal motion, I followed the procedure described by Guinan & Maloney (1985). A new observed rate of apsidal motion of 15◦.2/100 yr w...
متن کاملThe infrared spectrum of the Be star γ Cassiopeiae ⋆
We present the 2.4−45 μm ISO-SWS spectrum of the Be star γ Cas (B0.5 IVe). The spectrum is characterised by a thermal continuum which can be well fit by a powerlaw Sν ∝ ν0.99 over the entire SWS wavelength range. For an isothermal disc of ionized gas with constant opening angle, this correponds to a density gradient ρ(r) ∝ r−2.8. We report the detection of the Humphreys (6-∞) bound-free jump in...
متن کاملLuminous Red Variable Star
We report photometry and spectroscopy of the evolution of Nova Sagittarii 1994 #1 (V4332 Sagittarii) during outburst. We compare the photometric and spectral evolution of this outburst to known classes of outbursts – including classical novae and outbursts occurring on symbiotic stars – and find this object does not conform to any known class of outburst. The closest match to the behavior of th...
متن کاملA New Apsidal Motion Determination of the Eclipsing Binary Star V459 Cassiopeiae: A Possible Discrepancy Between the Theory and the Observation
Photometric and spectroscopic observations and analysis of the eccentric eclipsing binary V459 Cassiopeiae were performed by Lacy et al.(2004). The results show that V459 Cas has a slightly eccentric orbit with e = 0.0244. Observation of minimum light show the presence of apsidal motion. In order to find a new observed rate of apsidal motion, I followed the procedure described by Guinan & Malon...
متن کاملBeppoSAX broad–band observations of Gamma Cassiopeiae
We report broad-band X-ray measurements of the Be star γ Cassiopeiae by the BeppoSAX X-ray astronomy satellite. The observations took place on 1998 July, 18–23. The 0.1– 200 keV X-ray spectrum is reasonably well fit by an optically thin thermal plasma model of temperature 12.5±0.6 keV with significant residuals around 0.3 keV and 1 keV. The former is interpreted as the variable soft component r...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 1914
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.19141971410