Nicmos Observations of Gg Tau's Circumbinary Disk
نویسنده
چکیده
GG Tau is an ideal system for studying the structure of a circumbinary disk. Separated by 0.0025 (35 AU at d=140pc; Ghez et al. 1993, AJ 106), the stellar components of the binary are surrounded by a massive disk. Originally detected through thermal dust emission at millimeter wavelengths (Dutrey et al. 1994, A&A 286; Guilloteau et al. 1999, A&A in press), the disk was subsequently imaged in scattered light at near-infrared wavelengths with adaptive optics (Roddier et al. 1996, ApJ 463). Both of these earlier studies characterize the integrated, large-scale, disk properties. In order to study the internal structure we have carried out a high resolution imaging program at 1.1, 1.6, and 2.0 m with NICMOS aboard the Hubble Space Telescope.
منابع مشابه
NICMOS images of the GG Tau Circumbinary Disk
We present deep, near-infrared images of the circumbinary disk surrounding the pre–main-sequence binary star, GG Tau A, obtained with NICMOS aboard the Hubble Space Telescope. The spatially resolved proto-planetary disk scatters ∼1.5% of the stellar flux, with a near-to-far side flux ratio of ∼1.4, independent of wavelength, and colors that are comparable to the central source all of these prop...
متن کاملGG Tauri: the ring world
We present sub-arcsecond images of the mm dust emission and 13CO J=2–1 line emission in the young quadruple system GG Tau. These observations unambiguously resolve the circumbinary disk of the close (∼ 0.3′′) binary system into two distinct components: an extremely dense, sharp-edged ring, surrounded by an extended disk. Continuum emission is also detected from the center of this structure; it ...
متن کاملHST/WFPC2 Images of the GG Tauri Circumbinary Disk
We present the first visible wavelength images of the GG Tauri circumbinary ring, obtained with the Hubble Space Telescope’s Wide Field and Planetary Camera 2. Scattered light from the ring is detected in both V and I band images. The images show that the ring is smooth, except for a small gap that could be a shadow caused by material between the stars and the ring. The spokes seen extending fr...
متن کاملDetection of H2 pure rotational line emission from the GG Tau binary system
We present the first detection of the low-lying pure rotational emission lines of H2 from circumstellar disks around T Tauri stars, using the Short Wavelength Spectrometer on the Infrared Space Observatory. These lines provide a direct measure of the total amount of warm molecular gas in disks. The J=2→0 S(0) line at 28.218 μm and the J=3→1 S(1) line at 17.035 μm have been observed toward the d...
متن کاملACS Images of the GG Tauri Circumbinary Disk
Hubble Space Telescope Advanced Camera for Surveys images of the young binary GG Tauri and its circumbinary disk in V and I bandpasses were obtained in 2002 and are the most detailed of this system to date. They confirm features previously seen in the disk including: a " gap " apparently caused by shadowing from circumstellar material; an asymmetrical distribution of light about the line of sig...
متن کامل