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Home > Art, Film & Photography > Eso Objects Eso Objects: Westerlund 1, Sculptor Dwarf Galaxy, Sculptor Dwarf Irregulawesterlund 1, Sculptor Dwarf Galaxy, Sculptor Dwarf Irregular Galaxy, Eso 510-G13, Circi
Eso Objects Eso Objects: Westerlund 1, Sculptor Dwarf Galaxy, Sculptor Dwarf Irregulawesterlund 1, Sculptor Dwarf Galaxy, Sculptor Dwarf Irregular Galaxy, Eso 510-G13, Circi

Eso Objects Eso Objects: Westerlund 1, Sculptor Dwarf Galaxy, Sculptor Dwarf Irregulawesterlund 1, Sculptor Dwarf Galaxy, Sculptor Dwarf Irregular Galaxy, Eso 510-G13, Circi


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Chapters: Westerlund 1, Sculptor Dwarf Galaxy, Sculptor Dwarf Irregular Galaxy, Eso 510-G13, Circinus Galaxy, Eso 306-17, Eso 269-57, Am 2, Ngc 92, Ngc 87, Ngc 89, Leda 70742. Source: Wikipedia. Pages: 34. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: Westerlund 1 (sometimes abbreviated Wd1) is the most massive compact young star cluster known in the local group of galaxies and is about 3.5-5 kpc away from Earth. It was discovered by Bengt Westerlund in 1961 but remained largely unstudied for many years due to high interstellar extinction (absorption) in its direction. The cluster contains a large number of rare, evolved high-mass stars including 6 yellow hypergiants, 4 red supergiants, 24 Wolf-Rayet stars, a luminous blue variable, many OB supergiants and an unusual sgB star that has been proposed as the remnant of a recent stellar merger. In addition, X-ray observations have revealed the presence of the magnetar CXO J164710.2-455216 (also known as the Westerlund 1 magnetar), a slow X-ray pulsar that must have formed from a high-mass progenitor star. Westerlund 1 is believed to have formed in a single burst of star formation, implying the constituent stars have the same age and composition. Besides hosting some of the most massive and least-understood stars in the galaxy, it is useful as an analog to help astronomers determine what occurs within extragalactic super star clusters. Westerlund 1 at visible (left) and X-ray (right) wavelengths. Due to the large interstellar reddening the hot, blue OB supergiants appear red, as all the blue light from the stars has been absorbed. The Westerlund 1 magnetar is marked in the X-ray image.The brightest O7-8V main sequence stars in Wd1 have V-band photometric magnitudes around 20.5, and therefore at visual wavelengths Wd1 is dominated by highly l...More: http: //booksllc.net/?id=717568


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Product Details
  • ISBN-13: 9781157153122
  • Publisher: Books LLC
  • Publisher Imprint: Books LLC
  • Height: 152 mm
  • Sub Title: Westerlund 1, Sculptor Dwarf Galaxy, Sculptor Dwarf Irregulawesterlund 1, Sculptor Dwarf Galaxy, Sculptor Dwarf Irregular Galaxy, Eso 510-G13, Circi
  • Width: 229 mm
  • ISBN-10: 1157153127
  • Publisher Date: 15 Sep 2010
  • Binding: Paperback
  • Spine Width: 2 mm
  • Weight: 68 gr


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Eso Objects Eso Objects: Westerlund 1, Sculptor Dwarf Galaxy, Sculptor Dwarf Irregulawesterlund 1, Sculptor Dwarf Galaxy, Sculptor Dwarf Irregular Galaxy, Eso 510-G13, Circi
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