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 کاملBD − 21 ◦ 3873 : another yellow - symbiotic barium star ?
An abundance analysis of the yellow symbiotic system BD−21 • 3873 reveals it to be a metal-poor K-giant ([Fe/H] = −1.3) which is enriched in the heavy s-process elements. In that respect, this star appears to be a twin of AG Dra, another yellow symbiotic system analyzed in a previous paper (Smith et al., 1996). The heavy-element abundance distributions of AG Dra and BD−21 • 3873 are almost iden...
متن کاملDiscovery in IC 10 of the farthest known symbiotic star ⋆
We report the discovery of the first known symbiotic star in IC10, a starburst galaxy belonging to the Local Group, at a distance of ∼750 kpc. The symbiotic star was identified during a survey of emission-line objects. It shines at V =24.62±0.04, V −RC=2.77±0.05 and RC−IC=2.39±0.02 and suffers from EB−V =0.85±0.05 reddening. The spectrum of the cool component well matches that of solar neighbor...
متن کاملA radio jet in the prototypical symbiotic star Z And ?
As part of a multi-wavelength campaign to observe the 2000–2002 outburst of the prototypical symbiotic star Z Andromedae, we observed this object six times each with the Multi-Element Radio Linked Interferometer Network (MERLIN) and Very Large Array (VLA). The radio flux varied significantly during the course of the optical outburst at all three observation frequencies (1.4, 5, and 15 GHz). A j...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2007
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20066873