New infrared carbon stars in the IRAS point source catalog

Reconstruction Analysis of the Iras Point Source Catalog Redshift Survey

We present the results of reconstruction analysis of the galaxy distribution in a spherical region of radius 50 h~1 Mpc centered on the Local Group, as mapped by the IRAS Point Source Catalog Redshift Survey (PSCz). We reconstruct this galaxy distribution using 15 di†erent models for structure formation in the universe, each model consisting of a set of assumptions regarding the value of the co...

Tycho 2 stars with infrared excess in the MSX Point Source Catalogue

Stars of all evolutionary phases have been found to have excess infrared emission due to the presence of circumstellar material. To identify such stars, we have positionally correlated the infrared MSX point source catalogue and the Tycho 2 optical catalogue. A near/mid infrared colour criteria has been developed to select infrared excess stars. The search yielded 1938 excess stars, over half (...

The UCAC3 Star Catalog: A New Catalog of Optical Reference Stars for Space Surveillance

Version three of the U.S. Naval Observatory CCD Astrograph Catalog (UCAC3) was released in August 2009. As the first version of the UCAC to cover the entire sky, UCAC3 is a suitable source of optical reference stars in the R = 8 to 16 magnitude range. Containing just over 100 million objects and providing stellar positional accuracies of about 15 to 100 milliarcseconds (mas) per coordinate, UCA...

Photospheric composition of the carbon - rich 21 μ m post - AGB stars IRAS 22223 + 4327 and IRAS 04296 + 3429 ⋆

We present a detailed chemical analysis on the basis of high-resolution, high signal-to-noise optical spectra of two post-AGB objects IRAS 22223+4327 and IRAS 04296+3429. Both display the unidentified 21 μm feature in their IR-spectra. The analysis is performed using HR 1865(F0Ib) and HR 1017(F5Iab) as reference stars. The spectroscopic indicators provide accurate atmospheric parameters of Teff...

IRAS Observations of Scuti Stars