The He ii Fowler lines and the O iii and N iii Bowen fluorescence lines in the symbiotic nova RR Tel
نویسندگان
چکیده
منابع مشابه
Ultraviolet fluorescence lines of Fe II observed in satellite spectra of the symbiotic star RR Telescopii
By examining all emission lines of Fe II in high resolution satellite spectra of the symbiotic star RR Tel we have made a systematic study of fluorescence lines in the ultraviolet wavelength region 1200–3000 Å. We list 33 energy levels of Fe II that are selectively excited in the stellar system by photons from strong lines of H, He II, Si III, O III, C IV, O V, Ne V, and O VI. All energy levels...
متن کاملThe effect of dust obscuration in RR Tel on optical and IR long-term photometry and Fe II emission lines
Infrared and optical photometric and spectroscopic observations of the symbiotic nova RR Tel are used to study the effects and properties of dust in symbiotic binaries containing a cool Mira component, as well as showing ”obscuration events” of increased absorption, which are typical for such Miras. A set of photometric observations of the symbiotic nova RR Tel in different wavelength bands vis...
متن کاملAnti-Psoriatic Activity of Flavonoids from the Bark of Givotia rottleriformis Griff. Ex Wight.
Givotia rottleriformis has been used in the indigenous systems of medicine for the treatment of inflammatory diseases like rheumatism and psoriasis. In order to evaluate this information, antipsoriatic activity of three flavonoids isolated from the ethanol extract of the bark of Givotia rottleriformis were investigated using in-vitro and in-vivo model, namely Rutin (I), Luteolin-7-O-β-D-Glucuro...
متن کاملHS 1804 + 6753 : a new eclipsing CV above the period gap ?
We present spectroscopic and photometric observations of the cataclysmic variable HS 1804 + 6753, a new eclipsing dwarf nova of the UGem class. Its apparent visual brightness in quiescence is Mv ≈ 14. During its frequent outbursts the brightness increases by 1 − 2.3. From our photometric data, we determined the orbital period to be P = 0.2099370 ± 0.0000001. The spectroscopic observations show ...
متن کاملNaSt1: A Wolf-Rayet star cloaked by an η Car–like nebula?
We present a study of the peculiar Galactic emission line object NaSt1 (WR122, IRAS 18497+0056) which has previously been classified as a Wolf-Rayet (WR) star. Our spectroscopic dataset comprises Keck I-HIRES, WHT-ISIS and UKIRT-CGS4 observations which show that NaSt1 has a highly reddened nebular spectrum with extremely strong permitted and forbidden lines covering a wide range in excitation (...
متن کامل