Veils
See also: Veil
The Voiles are one of the 88 Constellation S of the sky, primarily visible of the Southern hemisphere. Included originally by Ptolémée in the immense constellation of the Ship Argo, it was created by Nicolas-Louis de Lacaille when he divided the ship into four distinct constellations. The Veils are the second resulting constellation by the size.
History and mythology
The Navire Argo represented, in the Greek Mythologie, the ship with which Jason left to research the Golden Fleece. Ptolémée had indexed it in its Almageste . Because of its size (1 884 square degrees) and of its extent (70° of is in west), Nicolas-Louis de Lacaille divided it into three constellations in 1752 in order to be able to handle it more easily. The constellation of the Veils is one of the resulting parts.
Observation of the sky
See also: Ship Argo (constellation)
Principal stars
See also: List of stars of the Veils
The designation S with the Greek letters having been assigned with the star S more than one century before division of the Ship Argo, each of the four constellations resulting from the partition inherited some as of its letters. Consequently, it misses several of the letters in each.
γ Velorum (Suhail Al Muhlif)
α and β having fallen with the Hull, γ Velorum (or Suhail Al Muhlif) is the most brilliant star of the constellation of the Veils. It is a multiple star. γ 1 Vel is a blue under-giantess of apparent Magnitude 4,27 and it probably has a companion. γ 2 Vel consists of a blue supergéante, 30 times more massive than the Sun and 200 000 times more luminous, and of a star Wolf-Rayet, nearest and one to hottest (more 60 000 K on the surface) which one knows, which turns one around the other in 78,5 days. γ1 Vel and γ ² Vel are separated from 10 000 ua .Gamma Velorum is sometimes called Regor , in the honor of the astronaut Roger Chaffee who perishes in the fire of the capsule Apollo 1 in 1967, by writing his first name with back.
Other stars
λ Vel (Alsuhail) is an orange supergéante, as large as the orbit of the Ground.
Celestial objects
The Veils are on part of the sky crossed by the Milky Way and contain several Amas and Nébuleuse S, like the open Amas S NGC 2547, NGC 2670, NGC 3201, IC 2391 and IC 2395, or the Nébuleuse planet gear NGC 3132.
The Nébuleuse of Gum extends mainly on the Veils (it overflows a little on the Poupe). It is the Rémanent of supernova. Calved (XYZ), also called SNR G263.9-03.3, also results from a supernova, in fact that which produced the Pulsar of Calved (or PSR B0833-45), one of first most studied pulsars discovered and one from still at present. Remanent the young person than Vela (XYZ) was discovered, recovering this one partially. It is called X-ray J0852-4622, or more simply Vela Junior, by opposion with Vela (XYZ). Vela Junior one of young people remanent is indeed known, with an age of about 700 years. It is also one of closest, but it does not seem only the supernova which gave him birth was observed.
See too
- List of stars of the Veils
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