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High-contrast Polarimetry Observation of the T Tau Circumstellar Environment
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Number of Authors: 552018 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 861, no 2, article id 133Article in journal (Refereed) Published
Abstract [en]

We conducted high-contrast polarimetry observations of T Tau in the H-band, using the High Contrast Instrument for the Subaru Next Generation Adaptive Optics instrument mounted on the Subaru Telescope, revealing structures as near as 0 1 from the stars T Tau N and T Tau S. The whole T Tau system is found to be surrounded by nebulalike envelopes, and several outflow-related structures are detected in these envelopes. We analyzed the detailed polarization patterns of the circumstellar structures near each component of this triple young star system and determined constraints on the circumstellar disks and outflow structures. We suggest that the nearly face-on circumstellar disk of T Tau N is no larger than 0.''8, or 117 au, in the northwest, based on the existence of a hole in this direction, and no larger than 0.''27, or 40 au, in the south. A new structure, N5, extends to about 0.''42, or 59 au, southwest of the star, and is believed to be part of the disk. We suggest that T Tau S is surrounded by a highly inclined circumbinary disk with a radius of about 0.''3, or 44 au, with a position angle of about 30 degrees, that is misaligned with the orbit of the T Tau S binary. After analyzing the positions and polarization vector patterns of the outflow-related structures, we suggest that T Tau S should trigger the well-known E-W outflow, and is also likely to be responsible for a southwest precessing outflow coil and a possible south outflow.

Place, publisher, year, edition, pages
2018. Vol. 861, no 2, article id 133
Keywords [en]
protoplanetary disks, binaries: general (T Tau), stars: pre-main sequence, stars: variables: T Tauri, Herbig Ae/Be
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-159109DOI: 10.3847/1538-4357/aac6c8ISI: 000438684300013OAI: oai:DiVA.org:su-159109DiVA, id: diva2:1244267
Available from: 2018-08-31 Created: 2018-08-31 Last updated: 2018-08-31Bibliographically approved

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