Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...501..841k&link_type=abstract
Astrophysical Journal v.501, p.841
Astronomy and Astrophysics
Astronomy
31
Stars: Binaries: Visual, Stars: Circumstellar Matter, Stars: Individual Name: Haro 6-5B, Stars: Individual Constellation Name: Fs Tauri, Ism: Jets And Outflows
Scientific paper
We have observed the field of FS Tauri (Haro 6-5) with the Wide Field Planetary Camera 2 on the Hubble Space Telescope. Centered on Haro 6-5B and adjacent to the nebulous binary system of FS Tauri A there is an extended complex of reflection nebulosity that includes a diffuse, hourglass-shaped structure. H6-5B, the source of a bipolar jet, is not directly visible but appears to illuminate a compact, bipolar nebula which we assume to be a protostellar disk similar to HH 30. The bipolar jet appears twisted, which explains the unusually broad width measured in ground-based images. We present the first resolved photometry of the FS Tau A components at visual wavelengths. The fluxes of the fainter, eastern component are well matched by a 3360 K blackbody with an extinction of AV = 8. For the western star, however, any reasonable, reddened blackbody energy distribution underestimates the K-band photometry by over 2 mag. This may indicate errors in the infrared photometry or errors in our visible measurements due to bright reflection nebulosity very close to the star. The binary was separated by 0."239 +/- 0."005 at a position angle of 84 deg +/- 1.dg5 on 1996 January 25. There is no nebulosity around FS Tau A at the orientation suggested for a disk based on previous, ground-based polarization measurements.
Ballester Gilda E.
Burrows Christopher J.
Clarke John T.
Crisp David
Evans Robin W.
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