Buscar
Mostrando ítems 11-20 de 55
Swift observations of the 2015 outburst of AG Peg - from slow nova to classical symbiotic outburst
(Oxford University Press, 2016-10)
Symbiotic stars often contain white dwarfs with quasi-steady shell burning on their surfaces. However, in most symbiotics, the origin of this burning is unclear. In symbiotic slow novae, however, it is linked to a past ...
Detection of X-rays from the jet-driving symbiotic star Hen 3-1341
(Edp Sciences, 2013-06)
Context. Hen 3-1341 is a symbiotic binary system consisting of a white dwarf and a red giant star that is one of about ten symbiotics that show hints of jets. The bipolar jets have been detected through displaced components ...
SU Lyn: Diagnosing the Boundary Layer with UV and Hard X-Ray Data
(IOP Publishing, 2018-08)
Symbiotic stars in which the symbiotic phenomenon is powered solely by accretion, often at an average rate that is higher than in cataclysmic variable stars, provide an important opportunity to diagnose boundary layers ...
Optical spectroscopy and X-ray observations of the D-type symbiotic star EF Aql
(Wiley Blackwell Publishing, Inc, 2020-06)
We performed high-resolution optical spectroscopy and X-ray observations of the recently identified Mira-type symbiotic star EF Aql. Based on high-resolution optical spectroscopy obtained with the Southern African Large ...
An illumination effect and an eccentric orbit for the symbiotic binary PU Vul revealed by 32 yr of optical spectroscopy
(Wiley Blackwell Publishing, Inc, 2018-09)
We analyse ~32 yr of optical spectra and photometry for the symbiotic binary PU Vul. Light curves for the He I λ4471, He II λ4686, and Hß λ4861 emission lines reveal an illumination effect, where the hot white dwarf ionizes ...
High-resolution optical spectroscopic observations of four symbiotic stars: AS 255, MWC 960, RW Hya, and StHα 32
(IOP Publishing, 2017-05-23)
We report on the analysis of high-resolution optical spectra of four symbiotic stars: AS 255, MWC 960, RW Hya, and StHα32. We employ the local-thermodynamic-equilibrium model atmospheres of Kurucz and the spectral analysis ...
Dissecting a Disk-instability Outburst in a Symbiotic Star: NuSTAR and Swift Observations of T Coronae Borealis during the Rise to the "superactive" State
(IOP Publishing, 2019-08)
The current superactive state of the recurrent nova T Coronae Borealis (T CrB) has been observed with unprecedented detail. Previously published observations provide strong evidence that this state is due to an enhancement ...
Rotational velocities of the giants in symbiotic stars - I. D '-type symbiotics
(BLACKWELL, 2006-02-01)
We have measured the rotational velocities (v sin i) of the mass donors in a number of D'-type symbiotic stars (SSs), using the cross-correlation function method. Four out of five D' SSs with known v sin i appeared to be ...
INTEGRAL View on cataclysmic variables and symbiotic binaries
(Elsevier, 2020-12)
Accreting white dwarfs (WDs) constitute a significant fraction of the hard X-ray sources detected by the INTEGRAL observatory. Most of them are magnetic Cataclysmic Variables (CVs) of the intermediate polar (IP) and polar ...