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The distance and structure of L379
UBV and H-beta photometry has been carried out on 107 stars locatedwithin the more obscured region of the dark galactic cloud L379. Most ofthe measured stars are fainter than 10.0 m and their spectralclassification is not available in the literature. Spectral types werefound for 47 stars using movement along the reddening line coupled withthe assumption that all stars are on the main sequence. For each star,the extinction A(v) (mag) and the distance r(kpc) were derived, and fromthe A(v)-r graph, an attempt was made to determine the structure ofL379.
| UBV photometry in the vicinity of L379
UBV photometric sequence is presented for 102 stars in the vicinity ofL379, which was obtained for distance determinations of L379, anisolated dark cloud which has been identified as a source of bipolarmolecular flow. Of these stars, 76 are those with known MK spectraltypes. The available data were insufficient for an accurate distancedetermination of L379, and additional UBV photometry within the cloud isplanned.
| Estimation of spectral classifications for bright southern stars with interesting Stromgren indices
This paper investigates the degree of success with which uvby photometrycan be applied to predict spectral classifications for 947 A, F, and Gstars brighter than an apparent magnitude of 8.3 and with four-colorindices indicating some kind of interesting, unusual, or peculiarspectrum. One or several possible spectral classifications are estimatedfor each star from photometry alone, double stars are distinguished, andthe estimates are compared with published classifications. The resultsshow that the framework provided by uvby photometry can be extended toinclude most G and K stars, reddened stars, peculiar stars, and certaintypes of double star.
| Carbon Stars in Two Northern Milky way Zones.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1957ApJ...125..195N&db_key=AST
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Kalkan |
| Sað Açýklýk: | 18h31m50.37s |
| Yükselim: | -15°10'57.6" |
| Görünürdeki Parlaklýk: | 7.295 |
| Uzaklýk: | 127.226 parsek |
| özdevim Sað Açýklýk: | -10 |
| özdevim Yükselim: | -6.5 |
| B-T magnitude: | 7.681 |
| V-T magnitude: | 7.327 |
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