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UBV beta Database for Case-Hamburg Northern and Southern Luminous Stars
A database of photoelectric UBV beta photometry for stars listed in theCase-Hamburg northern and southern Milky Way luminous stars surveys hasbeen compiled from the original research literature. Consisting of over16,000 observations of some 7300 stars from over 500 sources, thisdatabase constitutes the most complete compilation of such photometryavailable for intrinsically luminous stars around the Galactic plane.Over 5000 stars listed in the Case-Hamburg surveys still lackfundamental photometric data.
| Search for T Tauri Stars Based on the IRAS Point Source Catalog. II.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1995AJ....109.2146T&db_key=AST
| Candidate OH/IR stars in the outer parts of our Galaxy
The nature of a sample of IRAS candidate OH/IR stars outside the solarcircle is investigated with additional information from near infraredphotometry and radio OH(1612 MHz) measurements. It is shown that thesample is contaminated by a very large fraction (about 55 percent) ofobjects not on the Asymptotic-Giant Branch (AGB) and also by a smallfraction of carbon-rich AGB stars (about 10 percent). In contradictionto Habing (1988), we conclude that there is no thick disc of OH/IR starsin the outer Galaxy and no strict cutoff of the thin disc. The smallnumber of OH/IR stars in the outer Galaxy are most likely of a high mass(2-3 solar masses) based on their luminosity estimates in excess of 10exp 4 solar luminosities. We also discuss the differences in appearanceof the OH/IR stars in the outer Galaxy with those from the innerregions. We believe that the objects of larger galactic radii have lowerdust-mass-loss rates and that this is caused by a lower metallicity ofthese stars.
| SAO stars with infrared excess in the IRAS Point Source Catalog
We have undertaken a search for SAO stars with infrared excess in theIRAS Point Source Catalog. In contrast to previous searches, the entireIRAS (12)-(25)-(60) color-color diagram was used. This selection yieldeda sample of 462 stars, of which a significant number are stars withcircumstellar material. The stars selected can be identified aspre-main-sequence stars, Be stars, protoplanetary systems, post-AGBstars, etc. A number of objects are (visual) binary stars.Characteristic temperatures and IR excesses are calculated and theirrelations to spectral type are investigated.
| Photoelectric measurements of lunar occultation. VI. Further observational results.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1973AJ.....78..482D&db_key=AST
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