File:Halo of the Sombrero Galaxy (2020-08-4629).png

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The majestic Sombrero galaxy (M104) is a bright enigma, a hybrid that conforms to neither a spiral nor elliptical structure. It's also alone in the sky, not embedded inside a cluster of other galaxies.

Summary

Description	English: The majestic Sombrero galaxy (M104) is a bright enigma, a hybrid that conforms to neither a spiral nor elliptical structure. It's also alone in the sky, not embedded inside a cluster of other galaxies. How did it get this way? Astronomers used NASA's Hubble Space Telescope to investigate the history of this unusual galaxy, resolving tens of thousands of individual stars in the galaxy's vast halo, and measuring their metallicity — the presence of heavy elements — which can provide forensic clues to the galaxy's origin.
Date	20 February 2020 (upload date)
Source	Halo of the Sombrero Galaxy
Author	, Digitized Sky Survey, P. Goudfrooij () and The Hubble Heritage Team (/AURA)
Other versions	TIF version

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The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org.

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Author	Space Telescope Science Institute Office of Public Outreach
Image title	The massive Sombrero galaxy (M104) is a bright enigma, a hybrid that conforms to neither a spiral nor elliptical structure. It’s also alone in the sky, not embedded inside a cluster of other galaxies. How did it get this way? Astronomers used NASA’s Hubble Space Telescope to investigate the history of this unusual galaxy, resolving tens of thousands of individual stars in the galaxy’s vast halo, and measuring their metallicity — the presence of heavy elements — which can provide forensic clues to the galaxy’s origin.On the left is an image of the entire galaxy that includes a portion of the much fainter halo far outside its bright disk and bulge. Hubble photographed a region in the halo (white box). The images on the right zoom in to show the level of detail Hubble captured. The orange box, a small subset of Hubble’s view, contains myriad halo stars. The stellar population increases in density closer to the galaxy’s disk (bottom blue box). Each frame contains a bright globular cluster of stars, of which there are many in the Sombrero’s halo.The data gathered by Hubble surprised scientists, upending expectations set by the halos of other massive galaxies. The Sombrero’s halo contained more metal-rich stars than expected, but even stranger was the near-absence of old, metal-poor stars typically found in the halos of massive galaxies. Many of the globular clusters, however, contain metal-poor stars — why were they there, but not in the broader halo? Typically,stars migrate away from their parent clusters as they age. A possible explanation for the Sombrero’s perplexing features is that it is the product of the merger of massive galaxies billions of years ago, even though the smooth appearance of the galaxy’s disk and halo show no signs of such a huge disruption.
Short title	Hubble Indicates the Stately Sombrero Underwent Major Mergers
Credit/Provider	NASA, Digital Sky Survey, P. Goudfrooij (STScI) and The Hubble Heritage Team (STScI/AURA)
Source	STScI
Usage terms	http://hubblesite.org/copyright/
Date and time of data generation	18 February 2020
Color space	Uncalibrated
Exif version	2.31
Image width	1,136 px
Image height	1,148 px
Bits per component	8 8 8
Height	1,148 px
Width	1,136 px
Pixel composition	RGB
Number of components	3
Horizontal resolution	72 dpi
Vertical resolution	72 dpi
Contact information	outreach@stsci.edu http://hubblesite.org 3700 San Martin Drive Baltimore, MD, 21218 USA 410-338-4444
Keywords	Sombrero Galaxy M104
Date and time of digitizing	19:04, 9 January 2019
Software used	Adobe Photoshop 21.0 (Macintosh)
Date metadata was last modified	04:23, 18 February 2020
File change date and time	02:51, 18 February 2020
Unique ID of original document	xmp.did:d3046bb1-2b91-447a-9a22-d901ba35e49a

File:Halo of the Sombrero Galaxy (2020-08-4629).png

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