Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-06-07
Astrophys.J. 577 (2002) 826-838
Astronomy and Astrophysics
Astrophysics
Appearing in Astrophysical Journal. 24 pages; 8 figures
Scientific paper
10.1086/342235
The Herbig Ae/Be star LkHalpha 101 has been imaged at high angular resolution at a number of wavelengths in the near-infrared (from 1 to 3 microns) using the Keck 1 Telescope, and also observed in the mid-infrared (11.15 microns) using the U.C. Berkeley Infrared Spatial Interferometer (ISI). The resolved circular disk with a central hole or cavity reported in Tuthill et al. (2001) is confirmed. This is consistent with an almost face-on view (inclination < 35 deg) onto a luminous pre- or early-main sequence object surrounded by a massive circumstellar disk. With a multiple-epoch study spanning almost four years, relative motion of the binary companion has been detected, together with evidence for changes in the brightness distribution of the central disk/star. The resolution of the LkHalpha 101 disk by ISI mid-infrared interferometry constitutes the first such measurement of a young stellar object in this wavelength region. The angular size was found to increase only slowly from 1.6 to 11.15 microns, inconsistent with standard power-law temperature profiles usually encountered in the literature, supporting instead models with a hot inner cavity and relatively rapid transition to a cool or tenuous outer disk. The radius of the dust-free inner cavity is consistent with a model of sublimation of dust in equilibrium with the stellar radiation field. Measurements from interferometry have been combined with published photometry enabling an investigation of the energetics and fundamental properties of this prototypical system.
Danchi William C.
Hale D. D. S.
Monnier John D.
Townes Charles H.
Tuthill Peter G.
No associations
LandOfFree
Imaging the disk around the luminous young star LkHalpha 101 with infrared interferometry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Imaging the disk around the luminous young star LkHalpha 101 with infrared interferometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Imaging the disk around the luminous young star LkHalpha 101 with infrared interferometry will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-522555