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English: The sky is a jewelry box full of sparkling stars in these infrared images. The crown jewels are 14 massive stars on the verge of exploding as supernovae.

These hefty stars reside in one of the most massive star clusters in the Milky Way Galaxy. The bluish cluster is inside the white box in the large image, which shows the star-studded region around it. A close-up of the cluster can be seen in the inset photo.

These large stars are a tip-off to the mass of the young cluster. Astronomers estimate that the cluster is at least 20,000 times as massive as the Sun. Each red supergiant is about 20 times the Sun's mass.

The larger color-composite image was taken by the Spitzer Space Telescope for the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE) Legacy project. The survey penetrates obscuring dust along the thick disk of our galaxy to reveal never-before-seen stars and star clusters.

The false colors in the image correspond to infrared-light emission. The stars in the large color-composite image all appear blue because they emit most of their infrared light at shorter wavelengths.

The inset image, a false-color composite, was captured by the Two Micron All Sky Survey (2MASS). Astronomers identified the cluster as a potential behemoth after spotting it in the 2MASS catalogue. They then used the Infrared Multi-object Spectrograph at the Kitt Peak National Observatory in Arizona to analyze the cluster's colors. From that analysis, they discovered the red supergiants. They confirmed the red supergiants' pedigree by studying the colors of other red supergiants in data taken by the Spitzer Space Telescope.

The cluster lies 18,900 light-years away in the direction of the constellation Scutum. It is the first in a survey of 130 potentially massive star clusters in the Milky Way that astronomers will study over the next five years using a variety of telescopes, including the Spitzer and Hubble space telescopes.

The Spitzer image was taken April 4, 2004; the 2MASS image on July 4, 1999.

The science team that studied the star cluster consists of Don Figer, Space Telescope Science Institute/Rochester Institute of Techology; John MacKenty, Massimo Robberto, and Kester Smith, Space Telescope Science Institute; Francisco Najarro, Instituto de Estructura de la Materia in Madrid, Spain: Rolf Kudritzki, University of Hawaii in Honolulu; and Artemio Herrero, Universidad de La Laguna in Tenerife, Spain.
日期
來源 https://www.spitzer.caltech.edu/image/ssc2006-03a-a-hidden-massive-star-cluster-awash-with-red-supergiants
作者 NASA/JPL-Caltech, D. Figer (STScI/RIT)

Individual images

See https://www.spitzer.caltech.edu/image/ssc2006-03a-a-hidden-massive-star-cluster-awash-with-red-supergiants. High quality TIF files also available.

授權條款

Spitzer:

Public domain 本作品由NASA創作,屬於公有領域。根據NASA的版權政策:“NASA的創作除非另有聲明否則不受版權保護。”(參見:Template:PD-USGov/zhNASA版權政策JPL圖像使用政策
警告:

2MASS:

Public domain This work has been released into the public domain by its copyright holder, Two Micron All Sky Survey (2MASS). This applies worldwide.
這可能在某些國家不合法,如果是的話:
Two Micron All Sky Survey (2MASS)授予任何人有權利使用此作品於任何用途,除受法律約束外,不受任何限制。

Public domain
This image is from the Two Micron All Sky Survey (2MASS) project.

At http://www.ipac.caltech.edu/2mass/gallery/aboutimages.html it says:

"The images and image mosaics in the various Galleries are released into the public domain."

2MASS kindly requests acknowledgement in one of the following forms, the longer of which is preferred.

  • Atlas Image [or Atlas Image mosaic] obtained as part of the Two Micron All Sky Survey (2MASS), a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation.
  • Atlas Image [or Atlas Image mosaic] courtesy of 2MASS/UMass/IPAC-Caltech/NASA/NSF.

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目前2007年7月10日 (二) 19:55於 2007年7月10日 (二) 19:55 版本的縮圖3,000 × 2,400(8.83 MB)Anzibanonzi==Summary== The sky is a jewelry box full of sparkling stars in these infrared images. The crown jewels are 14 massive stars on the verge of exploding as supernovae. These hefty stars reside in one of the most massive star clusters in the Milky Way Galax

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