Astronomy:Sagittarius B1

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Short description: Luminous H II region
In visible light the lion's share of stars are hidden behind thick clouds of dust. This obscuring dust becomes increasingly transparent at infrared wavelengths. This 2MASS image, covering a field roughly 10 x 8 degrees (about the area of your fist held out at arm's length) reveals multitudes of otherwise hidden stars, penetrating all the way to the central star cluster of the Galaxy. This central core, seen in the upper left portion of the image, is about 25,000 light years away and is thought to harbor a supermassive black hole. The reddening of the stars here and along the Galactic Plane is due to scattering by the dust; it is the same process by which the sun appears to redden as it sets. The densest fields of dust still show up in this mosaic. Also evident are several nebulae to the lower right, including the Cat's Paw Nebula. The 2MASS analysis software has identified and measured the properties of almost 10 million stars in this spectacular field alone.
The galactic center of the milky way galaxy in visible light.

Sagittarius B1 also known as Sgr B1 is a luminous H II region in the galactic center.[1] The region is home to a lot of star formation making up 10% of the milky ways star formation in the last 100 million years even when it makes up 1% of the volume of the milky way galaxy.[2] Around six massive stars are located in Sagittarius B1 and evidence that tens of thousands of massive stars formed in SgrB1 within ~10 million years.[3] Stars around ~2 to 7 billion years old seem to be rare inside the inner regions of the nuclear stellar disk and might indicate inside out formation.[4]

References

  1. ↑ Simpson, Janet P.; Colgan, Sean W. J.; Cotera, Angela S.; Kaufman, Michael J.; Stolovy, Susan R. (2021-02-13) (in en). Sagittarius B1 -- A Patchwork of H II Regions and PhotoDissociation Regions. doi:10.3847/1538-4357/abe636. https://arxiv.org/abs/2102.07031v1. 
  2. ↑ published, Robert Lea (2022-08-26). "'Star factory' at Milky Way's heart seen for the first time" (in en). https://www.space.com/star-factories-discovered-milky-way-center. 
  3. ↑ Anderson, Natali (2022-08-29). "Astronomers Detect Excess of Young Stars in Sagittarius B1 | Sci.News" (in en-US). https://www.sci.news/astronomy/sagittarius-b1-young-stars-11141.html. 
  4. ↑ Nogueras-Lara, Francisco; Schödel, Rainer; Neumayer, Nadine (2022-08-25). "Detection of an excess of young stars in the Galactic Centre Sagittarius B1 region" (in en). Nature Astronomy: 1–7. doi:10.1038/s41550-022-01755-3. ISSN 2397-3366. https://www.nature.com/articles/s41550-022-01755-3. 




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