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Hubble Space TelescopeACS Coronagraphic Imaging of the Circumstellar Disk around HD 141569A
- Source :
- The Astronomical Journal. 126:385-392
- Publication Year :
- 2003
- Publisher :
- American Astronomical Society, 2003.
-
Abstract
- Multicolor coronagraphic images of the circumstellar disk around HD141569A have been obtained with the Hubble Space Telescope (HST) Advanced Camera for Surveys. B, V, and I images show that the disk's previously-described multiple-ring structure is actually a continuous distribution of dust with a tightly-wound spiral structure. Two, more open spiral arms extend from the disk, one of which appears to reach the nearby binary star HD141569BC. Diffuse dust is seen up to 1200AU from HD141569A. Although planets may exist in the inner region of the disk, tidal interaction with HD141569BC seems more likely to be the cause of these phenomena. The disk appears redder than the star (B-V = 0.21 and V-I = 0.25), and its color is spatially uniform. A scattering asymmetry factor of g = 0.25-0.35 is derived. The azimuthal density distribution is asymmetric, varying by a factor of ~3 at some radii.
- Subjects :
- Physics
Spiral galaxy
Scattering
media_common.quotation_subject
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Advanced Camera for Surveys
Asymmetry
Azimuth
Space and Planetary Science
Planet
Binary star
Astrophysics::Solar and Stellar Astrophysics
Astrophysics::Earth and Planetary Astrophysics
Astrophysics::Galaxy Astrophysics
Spiral
media_common
Subjects
Details
- ISSN :
- 15383881 and 00046256
- Volume :
- 126
- Database :
- OpenAIRE
- Journal :
- The Astronomical Journal
- Accession number :
- edsair.doi.dedup.....a921c472d8c0d74f1570d9b20ff55d73