Results 21 to 30 of about 1,062,764 (241)
On the Symbiotic X-Ray Binary Nature of the Star CGCS 5926 [PDF]
Open Astronomy, 2012 Abstract We report on multiwavelength (from X-ray to optical) follow up observations of a carbon star CGCS 5926, motivated by the fact that it is positionally coincident with a faint X-ray source of the ROSAT catalog, thus suggesting its possible symbiotic X-ray binary (SyXB) nature.
Masetti, N. +5 more
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The Astrophysical Journal, 2023 Astrophysical jets are present in a range of environments, including young stellar objects, X-ray binaries, and active galactic nuclei, but their formation is still not fully understood.
Caroline D. Huang +5 more
doaj +1 more source
An XMM-Newton View of the Symbiotic Stars HM Sge, NQ Gem, and PU Vul
The Astrophysical Journal, 2023 We present the analysis of archival XMM-Newton observations of the symbiotic stars HM Sge, NQ Gem, and PU Vul. The EPIC-pn spectra hint at the presence of emission lines, which are further confirmed in the first-order RGS spectra of the three sources ...
Jesús A. Toalá +2 more
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The peculiar symbiotic object V1329 Cygni: single-star versus binary models [PDF]
International Astronomical Union Colloquium, 1982 The variable emission-line object V1329 Cyg (= HBV 475) was discover red by Kohoutek (1969).Crampton and Grygar (1969) identified more than 100 emission lines in the blue portion of the spectrum, while Andrillat (1969) found evidence for the late-type (M) spectrum in the near infrared. This justified the classification of the object among the symbiotic
Jiri Grygar, Drahomir Chochol
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Creation of Neutral Disk-like Zone Around the Active Hot Star in Symbiotic Binaries [PDF]
Proceedings of the International Astronomical Union, 2011 AbstractWe investigated the ionization structure of symbiotic binaries during their active phases. We found that a neutral disk-like zone around the hot star can be created as a result of its enhanced wind and fast, 200 - 300 km s−1, rotation. Calculated column densities of the neutral hydrogen atoms throughout the neutral zone and emission measures of
Cariková Z., Skopal A.
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Orbital Elements of visual binary stars with very short arcs: With application to double stars from the 1829 southern double star catalog of James Dunlop [PDF]
, 2022 Binary double stars are those whose binding energies are less than zero. Obtaining binary star orbits from short arcs has been a long-standing problem in astrophysics.
Roderick R. Letchford +5 more
core +1 more source
A Non-Eclipsing Binary Model of the Symbiotic Star AG Dra [PDF]
Symposium - International Astronomical Union, 1987 The light variation of AG Dra is considered as a result of a variation of free-free emission from a gaseous envelope around the hot component. The emission measure of the envelope at a light maximum is estimated to be about Ne2V = 6.5 × 1059 cm−3. The amplitude of the light variation in the U band should be less than 1.4 mag.
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The Symbiotic Neutron Star Binary GX 1+4/V2116 Ophiuchi [PDF]
The Astrophysical Journal, 1997 46 pages including 7 PS figures.
Chakrabarty, Deepto, Roche, Paul
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Illumination in Symbiotic Binary Stars: Non‐LTE Photoionization Models. II. Wind Case [PDF]
The Astrophysical Journal, 1998 We describe a non-LTE photoionization code to calculate the wind structure and emergent spectrum of a red giant wind illuminated by the hot component of a symbiotic binary system. We consider spherically symmetric winds with several different velocity and temperature laws and derive predicted line fluxes as a function of the red giant mass loss rate ...
Proga, Daniel +2 more
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The Central Binary and Surrounding Nebula of the Symbiotic Star V1016 Cygni
The Astrophysical Journal, 2002 We present HST/WFPC2 images of the symbiotic star V1016 Cyg which, for the first time, directly explore the inner regions of the nebula to AU scales at optical wavelengths. They also suggest that the [OIII] 4959,5007 emission takes place in a bipolar outflow.
Eyres, S. +5 more
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