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- Lyman-alpha_blob_1 abstract "Lyman-alpha blob 1 (LAB-1) is a giant cosmic cloud of gas located at the southern constellation of Aquarius, some 11.5 billion light-years from Earth with a redshift (z) of 3.09. It was discovered unexpectedly in 2000 by Charles Steidel and colleagues, who were surveying for high-redshift galaxies using the 200 inch (5.08 m) Hale telescope at the Palomar Observatory. The researchers had been investigating the abundance of galaxies in the young Universe when they came across two objects which would become known as Lyman-alpha blobs—huge concentrations of gases emitting the Lyman-alpha emission line of hydrogen.LAB-1 is the first discovered Lyman-alpha blob, hence it has the number 1. It is the prototype of objects of this kind. It is also the largest of its kind, measuring 300,000 light years across, three times larger than the Milky Way. The blob appears green on the image because of the combination of the high redshift (z = 3) and the ultraviolet nature of the blob. Imaging with the European Southern Observatory's Very Large Telescope showed that much of the light from the blob is polarized, the proportion increasing and peaking at around 20% at a radius of 45 kiloparsecs (145,000 light-years), forming a huge ring around the blob.It is still unclear as to why this object is emitting the Lyman-alpha emission radiation. It is thought that the light is coming from galaxies within the central region of the blob. Light of such intensities could be from active galaxies or supermassive black holes actively absorbing matter. An alternate theory is that the light is from cooling gas falling into early galaxies, which has possibly come from cosmic filaments (as galaxies are thought to form at the intersections of these filaments), however the pattern of polarisation found argues against this.".
- Lyman-alpha_blob_1 thumbnail Lyman-alpha_blob_LAB-1.jpg?width=300.
- Lyman-alpha_blob_1 wikiPageID "41555316".
- Lyman-alpha_blob_1 wikiPageRevisionID "605097745".
- Lyman-alpha_blob_1 appmagB "27".
- Lyman-alpha_blob_1 appmagJ "24.41".
- Lyman-alpha_blob_1 appmagK "23.18".
- Lyman-alpha_blob_1 appmagR "24.49".
- Lyman-alpha_blob_1 caption "Polarized image of LAB-1, shown as the faint, green gas cloud.".
- Lyman-alpha_blob_1 constellation Aquarius_(constellation).
- Lyman-alpha_blob_1 credit European_Southern_Observatory.
- Lyman-alpha_blob_1 credit Very_Large_Telescope.
- Lyman-alpha_blob_1 distLy "1.15".
- Lyman-alpha_blob_1 name "Lyman-alpha blob 1".
- Lyman-alpha_blob_1 names "SMM J221726+0013".
- Lyman-alpha_blob_1 radiusLy "300000".
- Lyman-alpha_blob_1 type Lyman-alpha_blob.
- Lyman-alpha_blob_1 subject Category:Aquarius_(constellation).
- Lyman-alpha_blob_1 subject Category:Lyman-alpha_blobs.
- Lyman-alpha_blob_1 comment "Lyman-alpha blob 1 (LAB-1) is a giant cosmic cloud of gas located at the southern constellation of Aquarius, some 11.5 billion light-years from Earth with a redshift (z) of 3.09. It was discovered unexpectedly in 2000 by Charles Steidel and colleagues, who were surveying for high-redshift galaxies using the 200 inch (5.08 m) Hale telescope at the Palomar Observatory.".
- Lyman-alpha_blob_1 label "Lyman-alpha blob 1".
- Lyman-alpha_blob_1 sameAs m.0_853hd.
- Lyman-alpha_blob_1 sameAs Q16949697.
- Lyman-alpha_blob_1 sameAs Q16949697.
- Lyman-alpha_blob_1 wasDerivedFrom Lyman-alpha_blob_1?oldid=605097745.
- Lyman-alpha_blob_1 depiction Lyman-alpha_blob_LAB-1.jpg.
- Lyman-alpha_blob_1 isPrimaryTopicOf Lyman-alpha_blob_1.
