Photometric and spectroscopic analysis of high Galactic latitude molecular clouds. I - Distances and extinctions of stars toward 25 selected regions

Details Photometric and spectroscopic analysis of high Galactic latitude molecular clouds. I - Distances and extinctions of stars toward 25 selected regions Photometric and spectroscopic analysis of high Galactic latitude molecular clouds. I - Distances and extinctions of stars toward 25 selected regions

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apjs...83..273p&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 83, no. 2, p. 273-309.

Astronomy and Astrophysics

Astrophysics

40

Electrophotometers, Interstellar Extinction, Interstellar Matter, Molecular Clouds, Spectroscopic Analysis, H Beta Line, Milky Way Galaxy, Ubv Spectra

Scientific paper

The paper presents new photoelectric photometry in the UBV, uvby, and H-beta systems for 320 stars at high Galactic latitudes, selected for their proximity to the densest portions of a variety of high Galactic latitude atomic and molecular clouds. Low-resolution digital spectra are employed to classify 115 of the stars. Several novel techniques are developed for automatic digital spectral classification, and for dereddening Stromgren uvby-beta and Johnson UBV,H-beta photometry. An empirical determination of the errors in the derived dereddened colors, and techniques for converting between the two photometric systems are presented on the basis of the analysis of a statistically significant sample of 1480 stars with complete data sets in both photometric systems and with an accurate MK spectral type. New constraints on the distances to several clouds are presented.

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