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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

A gamma-ray pulsar is a compact neutron star that accelerates charged particles to relativistic speeds in its extremely strong magnetic field.  2, record 1, English, - gamma%2Dray%20pulsar

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

[Le pulsar] s'appelle PSR J0540-6919, mais ce nom de code ne devrait pas masquer son caractère exceptionnel : c'est le premier pulsar gamma — une de ces étoiles très denses en rotation rapide sur elle-même émettant des rayons gamma de très haute énergie — que les astronomes ont pu repérer au sein d'une autre galaxie que la nôtre.  1, record 1, French, - pulsar%20gamma

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

A neutron star with a much stronger magnetic field than ordinary neutron stars.  1, record 2, English, - magnetar

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Étoile à neutron fortement magnétisée.  2, record 2, French, - magnetar

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

The stellar explosions are among the most energetic events in the universe ... They are the dominant source of all elements in the periodic table heavier than oxygen ... The dynamics of an exploding star, involving things like fluid flow and radiation transport, are described in equations known as partial differential equations.  2, record 3, English, - stellar%20explosion

Record number: 3, Textual support number: 2 CONT

A supernova is a violent stellar explosion which destroys a star, while ejecting the products of nuclear burning into the gas between stars. The energy for some supernova explosions comes from the collapse of a massive star to a compact neutron star, with the mass of the Sun, but the size of a city. Elements out of which the Earth is formed had their origin in ancient supernova explosions in our own Milky Way Galaxy.  3, record 3, English, - stellar%20explosion

Record number: 3, Textual support number: 1 OBS

Part of the information contained in the English module of this record was provided by students of the Introduction to Terminology and Terminography class, section A, U. of Ottawa, Fall 2004.  4, record 3, English, - stellar%20explosion

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Phénomène de l'expansion gazeuse plus ou moins violente qui touche certaines zones d'une étoile ou l'étoile entière. Dans le premier cas, le phénomène relève de l'activité normale de chaque étoile, alors que, dans le second, il s'agit d'un événement exceptionnel.  1, record 3, French, - explosion%20stellaire

Record number: 3, Textual support number: 1 OBS

Si l'explosion stellaire n'est pas très violente, l'étoile observée prend le nom de «flare star». Dans le cas contraire, on assiste à la naissance d'une nova ou d'une supernova.  1, record 3, French, - explosion%20stellaire

Record number: 3, Textual support number: 2 OBS

Certains renseignements inclus dans le module français de cette fiche ont été fournis par les étudiants du cours d'Initiation à la terminologie et à la terminographie, section A, U. d'Ottawa, automne 2004.  2, record 3, French, - explosion%20stellaire

Record 3,  Textual support,  Spanish

Record number: 3, Textual support number: 1 CONT

Un astrónomo [...] captó la imagen de una estrella en el momento de su explosión, y el Instituto de Astrofísica de Canarias (IAC) piensa que puede ser "un nuevo tipo de explosión estelar". La imagen captada permite observar el "eco de luz" alejándose de la estrella [...] El fenómeno del "eco de luz" captado por los astrónomos es muy poco frecuente, y se produce cuando tras la explosión de una estrella, la energía producida crea una burbuja de luz que se expande a gran velocidad y que en el caso de esta estrella provocó que su luminosidad aumentara 10.000 veces en apenas unas semanas, explica el IAC.  1, record 3, Spanish, - explosi%C3%B3n%20estelar

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

A star that has undergone gravitational collapse to such a degree that most of its material has been compressed into neutrons. Neutron stars... are thought to form when the mass of the stellar core remaining after a supernova explosion exceeds the Chandrasekhar limit, i. e. 1. 44 solar masses.  2, record 4, English, - neutron%20star

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 DEF

Étoile dont la matière comporte un gaz dégénéré de neutrons.  3, record 4, French, - %C3%A9toile%20%C3%A0%20neutrons

Record number: 4, Textual support number: 1 CONT

Comment se passe l'explosion d'une supernova? 1) Les deux étoiles décrivent une orbite circulaire autour de leur centre de gravité. 2) L'étoile de gauche explose; le noyau devient une étoile à neutrons, l'enveloppe est éjectée dans l'espace. [...]  4, record 4, French, - %C3%A9toile%20%C3%A0%20neutrons

Record 4,  Textual support,  Spanish

Record number: 4, Textual support number: 1 DEF

Estrella en cuya materia, los protones y los electrones se convierten en neutrones.  1, record 4, Spanish, - estrella%20de%20neutrones

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[...] así como en lamateria ordinaria las partículas se hallan separadas por un espacio vacío, considerablemente grande respecto al volumen de aquéllas, en una estrella de neutrones, donde no existen fuerzas repulsivas, las partículas se apiñan.  1, record 4, Spanish, - estrella%20de%20neutrones

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

Among the myriad stars of our Galaxy, a handful are observed regularly emitting pulses of X-rays.... The pulsing X-rays are detected with instruments on spacecraft orbiting above the Earth's atmosphere... The same material that produces the X-ray pulsations also cause the neutron stars to spin faster or slower so much can be learned about the details of the accretion process or the neutron star by monitoring its changes in pulse frequency, which measures the rotation rate.  2, record 5, English, - X%2Dray%20pulsation

Record 5,  Textual support,  French

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 CONT

Microquasars are thought to be binary-star systems with one of the stars either a superdense neutron star or a black hole. They emit X-rays and eject jets of subatomic particles at speeds approaching that of light.  2, record 6, English, - microquasar

Record number: 6, Textual support number: 1 OBS

Though the neutron stars or black holes in microquasars are only a few times the mass of the sun, the phenomena associated with them, such as the jets, are similar to those seen in active galaxies and quasars, believed to be powered by the gravitational energy of black holes with millions of times the mass of the sun. As such, the microquasars provide much closer "laboratories" for study of these phenomena, which remain poorly understood.  2, record 6, English, - microquasar

Record number: 6, Textual support number: 1 PHR

Stellar microquasar.  3, record 6, English, - microquasar

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 CONT

[...] les microquasars dus à des trous noirs [...] [ont] quelques masses solaires seulement. Ces microquasars sont identifiés par leur émission dans le domaine des rayonnements X dur et gamma et des jets relativistes mis en évidence par leur émission dans le domaine radiométrique.  1, record 6, French, - microquasar

Record number: 6, Textual support number: 1 OBS

[La] structure du microquasar découvert au centre de la Galaxie [...] [comporte] son disque d'accrétion, le nuage moléculaire source de matière, le trou soir «moteur» et [...] deux jets.  1, record 6, French, - microquasar

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 CONT

Should the star be sufficiently massive, it will build elements up to iron in its interior. But iron is at the limit of nuclear-fusion reactions and further contraction of a massive star's core can only result in catastrophic collapse, leading to a supernova explosion. The most likely end-products of massive stars are neutron stars and black holes.  2, record 7, English, - massive%20star

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 CONT

Des étoiles massives vivent nettement moins longtemps que les étoiles de faible masse: la grande pression et la haute température qui règnent à l'intérieur des étoiles massives accélèrent les réactions de fusion nucléaires, ce qui diminue leur durée de vie.  1, record 7, French, - %C3%A9toile%20massive

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 DEF

The rapid implosion of a star or other astronomical body from its initial, normal size to a size hundreds of thousands of times smaller.  2, record 8, English, - gravitational%20collapse

Record number: 8, Textual support number: 1 CONT

’gravitational collapse’ usually refers to the sudden collapse of the core of a massive star at the end of nuclear burning, when its internal gas pressure can no longer support its weight.... The eventual degree of gravitational collapse is determined by the mass that remains. The three most likely end-products(in order of increasing mass) are white dwarfs, neutron stars, and black holes.  3, record 8, English, - gravitational%20collapse

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 CONT

C'est l'astrophysicien indien Chandrasekhar qui prouva qu'au dessus d'une masse limite qui porte son nom, de l'ordre d'une masse solaire (...), aucun corps froid ne peut échapper à l'effondrement gravitationnel.  1, record 8, French, - effondrement%20gravitationnel

Record 8,  Textual support,  Spanish

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 OBS

X-ray binary. The most common type of luminous galactic x-ray source, involving a close binary system in which gas flows(via the inner Lagrangian point) or blows(by a strong stellar wind) from a normal nondegenerate star on to a compact companion. For the most luminous sources,... this companion is probably a neutron star or black hole;...  1, record 9, English, - compact%20companion

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 OBS

Ultérieurement, l'étoile à neutrons n'est quasiment pas détectable. De pareils systèmes d'étoiles brillantes avec un compagnon compact sont appelés des "systèmes dormants".  1, record 9, French, - compagnon%20compact

Record 9,  Textual support,  Spanish