Using proper motion data for 894 stars in the Orion Nebula Cluster (ONC) compiled by Jones & Walker in 1988, we search for binaries with apparent separations in the range 1000–5000 AU, and find an upper limit of three. Using a Monte Carlo method, we test the consistency of this result with two hypotheses: i) that the cluster contains a binary population identical to that found in the solar neig...

with hisextensiveknowledgeof mythologicalstories, astronomy andalchemy, nezamicreatesin haft peykara mysterious narration, which offers new dimensions and colors in every reading.bahrām-egōr, the hero ofnezami’s narration, goes through sevenstages toachieveself-knowledgeand perfection. this process ofindividualityterminateson a friday by his marriage withthe iranian princess. bahrām’s (mars) ma...

In this paper, we investigate the usage of machine learning in the detection and recognition of double stars. To do this, numerous images including one star and double stars are simulated. Then, 100 terms of Zernike expansion with random coefficients are considered as aberrations to impose on the aforementioned images. Also, a telescope with a specific aperture is simulated. In this work, two k...

We carried out a search for M–type Vega–like stars by correlating the IRAS Faint Source Catalog with Hipparcos selected M–type stars. Three stars with apparent IRAS 25 μm excess emission are shown instead to be non–IR–excess stars from ground–based 11.7 and 17.9 μm photometry. Two stars previously suggested to have Vega–like mid–IR excess are also shown to be non–excess stars. These results imp...

We use a new technique to search for faint red stars in the Hubble Deep Field (HDF) imaged by the Wide Field Camera (WFC2) on the Hubble Space Telescope. We construct a densely sampled stellar light profile from a set of undersampled images of bright stars in a low-latitude field. Comparison of this stellar light profile to densely sampled profiles of individual objects in the HDF constructed f...