AAS 201st Meeting, January, 2003
Session 25. Circumstellar Material and Mass Loss
Oral, Monday, January 6, 2003, 10:00-11:30am, 602-604

[Previous] | [Session 25] | [Next]

[25.01] ACS Coronagraphic Observations of the HD141569 Circumstellar Disk

M. Clampin, J. E. Krist (STScI), D. A. Golimowski, D. R. Ardila (JHU), F. Bartko (Bartko Sci. & Tech.), N. Ben\'itez, J.P. Blakeslee (JHU), R. Bouwens (UCO/Lick Observatory), T.J. Broadhurst (Racah Inst. Physics, Hebrew U.), R.A. Brown, C. Burrows (STScI), E. Cheng (GSFC), N. Cross, P.D. Feldman, H.C. Ford (JHU), M. Franx (Leiden Obs.), C. Gronwall (Pennsylvania State Univ.), G. Hartig (STScI), G.D. Illingworth (UCO/Lick Obs.), L. Infante (Pontificia Univ. Catolica de Chile), R.A. Kimble (GSFC), M. Lesser (Steward Obs.), A.R. Martel, F. Menanteau, G.R. Meurer (JHU), G. Miley (Leiden Obs.), M. Postman (STScI), P. Rosati (ESO), M. Sirianni (JHU), W.B. Sparks (STScI), H.D. Tran, Z.I. Tsvetanov (JHU), R.L. White (STScI), W. Zheng (JHU)

We report on the ACS Early Release Observations of the HD 141569A circumstellar disk. Images were obtained in B, V, and I equivalent filters using the ACS coronagraph. The images resolve the multizonal structures previously seen by NICMOS and STIS into thin, nested spirals. Two open spiral arms are seen to extend away from the outer region of the disk, and one appears to connect with the nearby binary system HD 141569BC. HD 141569A is also offset by 25 AU from the geometric center of the disk. We conclude that tidal interaction with the binary is a more likely cause for the disk structure than interaction with planets within the disk. The optically thin disk is redder than the star and has colors similar to the disk around HR 4796. No color gradients are seen within the disk itself.

ACS was developed under NASA contract NAS 5-32865, and this research is supported by NASA grant NAG5-7697. We are grateful for an equipment grant from the Sun Microsystems, Inc.

[Previous] | [Session 25] | [Next]

Bulletin of the American Astronomical Society, 34, #4
© 2002. The American Astronomical Soceity.