Discovery of a sub-arcsec halo structure around Elias 1

Details Discovery of a sub-arcsec halo structure around Elias 1 Discovery of a sub-arcsec halo structure around Elias 1

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...248l...1k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 248, no. 1, Aug. 1991, p. L1-L4.

Astronomy and Astrophysics

Astrophysics

13

Halos, Molecular Clouds, Peculiar Stars, Pre-Main Sequence Stars, Stellar Envelopes, Stellar Structure, Dark Matter, Interstellar Matter, Power Spectra, Speckle Interferometry, Taurus Constellation

Scientific paper

The peculiar pre-main-sequence object Elias 1 in the Taurus dark cloud was observed with an infrared speckle interferometer using a 32 element linear array detector. From the observed visibility curves, it is found that an asymmetric sub-arcsec structure consisting of a core and a halo component in both the K and the L bands. The halo is highly flattened and elongated in the east-west direction. The characteristic half widths in this direction are 40 AU and 100 AU in the K and the L bands, respectively. It is interpreted that the halo component represents scattered light by the dust of a nearly edge-on circumstellar disk.

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