White Dwarf Stars in M4

Right Image

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

 

Left Image

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

Credit:

Harvey Richer (University of British Columbia, Vancouver, Canada), M. Bolte (University of California, Santa Cruz) and NASA/ESA

About the Image

NASA press release
NASA caption
Id:opo9532a
Type:Observation
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
• X - Stars Images/Videos
• X - Star Clusters Images/Videos
Distance:5500 light years

Colours & filters

BandWavelengthTelescope
Ultraviolet
U
336 nm Hubble Space Telescope
WFPC2
Optical
V
555 nm Hubble Space Telescope
WFPC2
Infrared
I
814 nm Hubble Space Telescope
WFPC2

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.


Image Formats

Large JPEG
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Screensize JPEG
241.2 KB

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