The Circumstellar Disk of HD 141569 Imaged with NICMOS

Details The Circumstellar Disk of HD 141569 Imaged with NICMOS The Circumstellar Disk of HD 141569 Imaged with NICMOS

1999-09-06

arxiv.org/abs/astro-ph/9909097v1

Astronomy and Astrophysics

Astrophysics

4 pages, LaTeX with emulateapj.sty and epsfig.sty, 4 postscript figures, Accepted to ApJ Letters

Scientific paper

10.1086/312334

Coronagraphic imaging with the Near Infrared Camera and Multi Object Spectrometer on the Hubble Space Telescope reveals a large, ~400 AU (4'') radius, circumstellar disk around the Herbig Ae/Be star HD 141569. A reflected light image at 1.1 micron shows the disk oriented at a position angle of 356 +/- 5 deg and inclined to our line of sight by 51 +/- 3 deg; the intrinsic scattering function of the dust in the disk makes the side inclined toward us, the eastern side, brighter. The disk flux density peaks 185 AU (1.''85) from the star and falls off to both larger and smaller radii. A region of depleted material, or a gap, in the disk is centered 250 AU from the star. The dynamical effect of one or more planets may be necessary to explain this morphology.

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