To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

Sagittarius Stream

From Wikipedia, the free encyclopedia

In astronomy, the Sagittarius Stream is a long, complex structure made of stars that wrap around the Milky Way galaxy in an orbit that nearly crosses the galactic poles. It consists of tidally stripped stars from the Sagittarius Dwarf Elliptical Galaxy, resulting from the process of merging with the Milky Way over a period of billions of years.

This stellar stream was originally proposed in 1995 by Donald Lynden-Bell after analyzing the distribution of globular clusters in the Milky Way.[1] The actual structure was identified by Newberg and associates (2002)[2] plus Majewski and associates (2003)[3] using data from the 2MASS and SDSS surveys. In 2006, Belokurov and his collaborators[4] found that the Sagittarius Stream has two branches.

When the progenitor object was shredded apart during the interaction, it sent oscillations (analogous to sound waves) through the Milky Way spiral arm structure. The effects of the oscillations are observed today as layers of alternately denser and sparser star distributions, above and below the Solar System. Presently, the position of the Sagittarius Stream relative to the observed layers[5] make the Sagittarius Dwarf Elliptical Galaxy the strongest candidate for this intruding object.

YouTube Encyclopedic

  • 1/1
    Views:
    787
  • The Sagittarius, Cetus and LMS1 streams populating the Milky Way halo

Transcription

See also

References

  1. ^ Lynden-Bell, R. M.; Lynden-Bell, D. (July 1995). "Ghostly streams from the formation of the Galaxy's halo". Monthly Notices of the Royal Astronomical Society. 275 (2): 429–442. Bibcode:1995MNRAS.275..429L. doi:10.1093/mnras/275.2.429.
  2. ^ Newberg, Heidi Jo; et al. (April 2002). "The Ghost of Sagittarius and Lumps in the Halo of the Milky Way". The Astrophysical Journal. 569 (1): 245–274. arXiv:astro-ph/0111095. Bibcode:2002ApJ...569..245N. doi:10.1086/338983. S2CID 16909562.
  3. ^ Majewski, Steven R.; et al. (December 2003). "A Two Micron All Sky Survey View of the Sagittarius Dwarf Galaxy. I. Morphology of the Sagittarius Core and Tidal Arms". The Astrophysical Journal. 599 (2): 1082–1115. arXiv:astro-ph/0304198. Bibcode:2003ApJ...599.1082M. doi:10.1086/379504. S2CID 2387702.
  4. ^ Belokurov, V.; et al. (May 2006). "The Field of Streams: Sagittarius and Its Siblings". The Astrophysical Journal. 642 (2): L137–L140. arXiv:astro-ph/0605025. Bibcode:2006ApJ...642L.137B. doi:10.1086/504797. S2CID 1774643.
  5. ^ Yanny, Brian; Gardner, Susan (Sep 2013). "The Stellar Number Density Distribution in the Local Solar Neighborhood is North-South Asymmetric". The Astrophysical Journal. 777 (2): 91. arXiv:1309.2300. Bibcode:2013ApJ...777...91Y. doi:10.1088/0004-637X/777/2/91. S2CID 118314811.

External links


This page was last edited on 11 September 2023, at 22:08
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.