Cited by 254Astrophysics and Star Formation StudiesStellar, planetary, and galactic studiesAstro and Planetary Science

An Edge-on Circumstellar Disk in the Young Binary System HK Tauri

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Stapelfeldt, Karl R., Krist, John E., Ménard, François, Bouvier, Jérôme, Padgett, Deborah L., Burrows, Christopher J.·1998·The Astrophysical Journal

Abstract

Hubble Space Telescope ( HST ) images of HK Tauri reveal that the companion star in this 2 4 (340 AU) pre-main-sequence binary system is an entirely nebulous object at visual wavelengths. HK Tau/c appears as two elongated reflection nebulosities separated by a dark lane. Near-infrared adaptive optics observations made at the Canada-France-Hawaii Telescope show a similar morphology and no directly visible star at λ≤2.2 μm. HK Tau/c is strikingly similar to scattered light models of an optically thick circumstellar disk seen close to edge-on and to the HST images of HH 30. HK Tau/c is therefore the first disk to be clearly resolved around an individual star in a young binary system. The disk properties have been constrained by fitting model reflection nebulae to the HST images. The disk has a radius of 105 AU, an inclination of about 5°, a scale height of 3.8 AU at r =50 AU, and is flared. The absence of a point source in the near-IR requires A V >50 mag toward the unseen central star. The thickness of the dark lane establishes a disk mass near 10 -4 M ☉ (~0.1 M Jupiter ) of dust and gas, if the dust grains have interstellar properties and remain fully mixed vertically. With the observed disk radius equal to one-third of the projected separation of the binary, there is a strong possibility that tidal truncation of the circumsecondary disk has occurred in this system.

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Research works printed but not linked: 2

  1. [24]24. Shu, F., Najita, J., Galli, D., Ostriker, E., & Lizano, S. 1993, in Protostars and Planets III, ed. E. H. Levy & J. I. Lunine (Tuscon: Univ. Arizona Press), 3
  2. [25]25. Stapelfeldt, K. R., Burrows, C. J., & Krist, J. E. 1997, in Proc. IAU Symp. 182, Herbig-Haro Flows and the Birth of Low-Mass Stars, ed. B. Reipurth & C. Bertout (Dordrecht: Kluwer), 355

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Authors
Stapelfeldt, K. R., Krist, J. E., Ménard, F., Bouvier, J., Padgett, D. L., & Burrows, C. J.
Affiliations
  • Jet Propulsion Laboratory (US)
  • Space Telescope Science Institute (US)
  • Université Joseph Fourier (FR)
  • California Institute of Technology (US)
Venue
The Astrophysical Journal
Published
1998-07-20
Volume
502
Issue
1
Pages
L65-L69
ISSN
0004-637X (ISSN-L)
OpenAlex
W2083293100
Cited by
252
References
23
Citations by year
2026: 3 · 2025: 5 · 2024: 1 · 2023: 1 · 2022: 4 · 2021: 4 · 2020: 10 · 2019: 3 · 2018: 6 · 2017: 5 · 2016: 8 · 2015: 4 · 2014: 8 · 2013: 10 · 2012: 10
FWCI
15.21
Type
journal article
Language
en
Open access
Locations
The Astrophysical Journal (publishedVersion)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysics and Star Formation Studies
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astro and Planetary Science
Keywords
circumstellar disks, edge-on disk, young binary stars, pre-main-sequence stars, reflection nebulae, scattered light, disk inclination, disk mass, tidal truncation, dark lanes, HH 30, disk flaring

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