Chaotic variations in the eccentricity of the planet orbiting 16 Cygni B
Article Abstract:
The 16 Cygni B is a star that is companion to another star, the 16 Cygni A. A recently discovered extrasolar planet that orbits the 16 Cygni B has the largest orbital eccentricity of any known planet. Its orbital behavior is more characteristic of a brown dwarf than that of a planet. The high eccentricity may be due to gravitational interactions between 16 Cygni B and its planet and their distant companion 16 Cygni A. The planet's orbital eccentricity also suggests that the planet could spend some time in a low-eccentricity orbit while the rest is spent in a high one.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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Radio observations of the classical nova Cygni 92 eighty days after outburst
Article Abstract:
A subject of binary stellar systems results in classical novae, in which the thermonuclear processes on the surface of the white dwarf, a primary component, causes the causes eruption of stellar material. The radio emission noted in these ejections is a result of the thermal bremsstrahlung mechanism occurring within an isothermal, expanding shell of ionized gas. Nova Cygni 92 was observed through Multi-Element Radio Linked Interferometer Network (MERLIN) and its temperatures were calculated.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1993
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Li in V404 Cygni
Article Abstract:
The detection of the element lithium in the star V404 Cygni's spectrum indicates that the star is probably a triple binary system. This system may consist of a dwarf star, an unseen companion and a black hole. Analysis of V404 Cyg's spectrum bears out this hypothesis and also suggests that the system is approximately 1.5 kiloparsecs from the Sun and is producing a large amount of X-ray luminosity.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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