Observation of the Central Part of the Beta-Pictoris Disk with an Anti-Blooming CCD

Details Observation of the Central Part of the Beta-Pictoris Disk with an Anti-Blooming CCD Observation of the Central Part of the Beta-Pictoris Disk with an Anti-Blooming CCD

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...274..877l&link_type=abstract

Astronomy and Astrophysics, Vol. 274, NO. 3/JUL(III), P. 877, 1993

Astronomy and Astrophysics

Astrophysics

47

Stars: Β Pictoris, Stars: Circumstellar Matter, Techniques: Miscellaneous

Scientific paper

β Pictoris (A5V) possesses a circumstellar disk of gas and dust which is oriented edge-on to Earth. Possibly a planet may be indirectly responsible for spectroscopic events, presently interpreted as the signature of the vaporisation of comet-like bodies when grazing the star, and may have cleared up dust particles in the inner zone. Previous coronographic studies coupled with IRAS and ground based IR observations also seem to indicate that the inner regions of the disk may be possibly dust free. We have extended the coronographic studies closer to the star in order to directly observe this zone, through a different observational technique based on the use of an anti- blooming CCD. These new observations, recorded at La Silla (Chile), revealed the structure of the disk down to two arcsec from the star (30 AU from the star). A different nature of dust particles seems to be present in the inner regions of the disk, in possible relation with a planetary formation process. Also an inverted asymmetry is observed in the inner region of the disk when compared to the outer one, a structure possibly related to a non homogeneous distribution of the dust within the disk.

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