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News Release 115 of 250

June 27, 2006 01:00 PM (EDT)

News Release Number: STScI-2006-25

Hubble Reveals Two Dust Disks Around Nearby Star Beta Pictoris


Image: Hubble Sees Two Dust Disks Around Beta Pictoris

Hubble Sees Two Dust Disks Around Beta PictorisSTScI-PRC2006-25a

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This Hubble Space Telescope view of Beta Pictoris clearly shows a primary dust disk and a much fainter secondary dust disk. The secondary disk extends at least 24 billion miles from the star and is tilted roughly 4 to 5 degrees from the primary disk. The secondary disk is circumstantial evidence for the existence of a planet in a similarly inclined orbit. The planet may have indirectly formed the secondary disk by sweeping up smaller planetesimals chunks of rock and/or ice from the main disk. The planetesimals then collide, producing the dust seen in the disk. The image, taken with the Advanced Camera for Surveys (ACS), is the sharpest visible-light view of the disks around Beta Pictoris.

Astronomers used the Advanced Camera's coronagraph to block out the light from the bright star. The black circle in the center of the image marks the coronagraphic mask. The colorful spike-like features and the speckled background are artifacts of the image processing which removed the residual starlight. The color image reveals that the disk is slightly red. The disk appeared gray in previous images taken by ground-based telescopes. Though astronomers are not sure why the disk is red, they think it is due to compact or fluffy grains of graphite and silicates, which may be as small as smoke particles.

The image was taken Oct. 1, 2003.

The Advanced Camera for Surveys images were obtained as part of the guaranteed observing time awarded to the ACS Investigation Definition Team led by Holland Ford (Johns Hopkins University) and Garth Illingworth (University of California at Santa Cruz).

Object Name: Beta Pic

Image Type: Astronomical/Illustration

Credit: Credit: NASA, ESA, D. Golimowski (Johns Hopkins University), D. Ardila (IPAC), J. Krist (JPL), M. Clampin (GSFC), H. Ford (JHU), and G. Illingworth (UCO/Lick) and the ACS Science Team


The above montage includes these images:

Beta Pictoris - Star with Disk - Not Annotated Image Type: Astronomical Beta Pictoris - Star with Disk - Not Annotated Beta Pictoris - Star with Disk - Annotated Image Type: Astronomical/Illustration Beta Pictoris - Star with Disk - Annotated

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