White Dwarf Stars in M4
A view of globular cluster M4 (fourth object in the Messier catalog of star clusters and nebulae). The nearest globular cluster to Earth (7, 000 light-years away), and containing more than 100, 000 stars, M4 was the target of a Hubble Space Telescope search for white dwarf stars.
The box (right of center) shows the small area that Hubble telescope probed.
Credit: M. Bolte (University of California, Santa Cruz) and Kitt Peak National Observatory 0.9-meter telescope
A Hubble Space Telescope colour image of a small portion of the cluster only 0.63 light-years across reveals eight white dwarf stars among the cluster's much brighter population of yellow sun-like stars and cooler red dwarf stars.
Hubble reveals a total of 75 white dwarfs in one small area within M4, out of the total of about 40, 000 white dwarfs that the cluster is predicted to contain.
Credit: Harvey Richer (University of British Columbia, Vancouver, Canada) and NASA
About the Image
|Release date:||28 August 1995, 06:00|
|Size:||800 x 480 px|
About the Object
|Name:||M 4, Messier 4, NGC 6121|
|Type:||• Milky Way : Star : Grouping : Cluster : Globular|
• Stars Images/Videos
• Star Clusters Images/Videos
|Distance:||5500 light years|
Colours & filters
|336 nm||Hubble Space Telescope|
|555 nm||Hubble Space Telescope|
|814 nm||Hubble Space Telescope|
Notes: The left image was captured by the Kitt Peak National Observatory 0.9-meter telescope, the right image is from the Hubble Space Telescope.