Properties of Stars in the Subaru Deep Field

We investigate the properties of objects in the Subaru Deep Field (SDF), using public catalogs constructed from images in several optical passbands. Using a small subset of objects most likely to be stars, we construct a stellar locus in three-dimensional color space. We then compare the position of all objects relative to this locus to create larger samples of stars in the SDF with rough spectral types. The number counts of stars defined in this way are consistent with those of current models of the Galaxy.Comment: 14 pages, 9 figures, to appear in PASJ vol 57, number 6 (Dec 2005). Additional data available at http://spiff.rit.edu/sd

Proposal to encode Egyptian Hieroglyphs in the SMP of the UCS

This is a proposal to encode a subset of the Egyptian Hieroglyphs in the international character encoding standard Unicode. The script was published in Unicode Standard version 5.2 in October 2009. The character repertoire includes the "Gardiner set" of characters, with additional characters. Format characters which allow layout of characters in a quadrat are separately encoded (see: and Chapter 11.4 of The Unicode Standard)

Lip Synchronization by Acoustic Inversion

Talking computer animated characters are a common sight in video games and movies. Although doing the mouth animation by hand gives the best results it is not always feasible because of cost or time constraints. Therefore producing lip animation automatically is highly desirable. The problem can therefore be phrased as mapping from speech to lip animation or in other words as an acoustic inversion. In our work we propose a solution that takes a sequence of input frames of speech and maps it directly to an output sequence of animation frames. The key point is that there is no need for phonemes or visemes which cuts one step in the usual lip synchronization process

Modeling the Infrared Reverberation Response of the Circumnuclear Dusty Torus in AGN: The Effects of Cloud Orientation and Anisotropic Illumination

The obscuring circumnuclear torus of dusty molecular gas is one of the major components of active galactic nuclei (AGN). The torus can be studied by analyzing the time response of its infrared (IR) dust emission to variations in the AGN continuum luminosity, a technique known as reverberation mapping. The IR response is the convolution of the AGN ultraviolet/optical light curve with a transfer function that contains information about the size, geometry, and structure of the torus. Here, we describe a new computer model that simulates the reverberation response of a clumpy torus. Given an input optical light curve, the code computes the emission of a 3D ensemble of dust clouds as a function of time at selected IR wavelengths, taking into account light travel delays. We present simulated dust emission responses at 3.6, 4.5, and 30 $\mu$m that explore the effects of various geometrical and structural properties, dust cloud orientation, and anisotropy of the illuminating radiation field. We also briefly explore the effects of cloud shadowing (clouds are shielded from the AGN continuum source). Example synthetic light curves have also been generated, using the observed optical light curve of the Seyfert 1 galaxy NGC 6418 as the input. The torus response is strongly wavelength-dependent, due to the gradient in cloud surface temperature within the torus, and because the cloud emission is strongly anisotropic at shorter wavelengths. Anisotropic illumination of the torus also significantly modifies the torus response, reducing the lag between the IR and optical variations.Comment: 17 pages, 14 figures, published in the Astrophysical Journal (2017 July 1

Proper motions with Subaru II. A sample in the Subaru/XMM-Newton Deep Survey field

We search for stars with proper motions in a set of deep Subaru images, covering about 0.48 square degrees to a depth of $i' \simeq 26$, taken over a span of five and a half years. We follow the methods described in \citet{Richmond2009} to reduce and analyze this dataset. We present a sample of 69 stars with motions of high significance, and discuss briefly the populations from which they are likely drawn. Based on photometry and motions alone, we expect that 14 of the candidates may be white dwarfs. Our candidate with the largest proper motion is surprisingly faint and likely to prove interesting: its colors and motions suggest that it might be an M dwarf moving at over 500 km/sec or an L dwarf in the halo.Comment: 10 pages, 5 figures. Accepted by Publications of the Astronomical Society of Japan, to appear in volume 62, February 2010. Revised version: removed PASJ LaTeX tutorial which was mistakenly appended to pape