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HD 29709

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Photometric and spectroscopic analysis of high Galactic latitude molecular clouds. I - Distances and extinctions of stars toward 25 selected regions
The paper presents new photoelectric photometry in the UBV, uvby, andH-beta systems for 320 stars at high Galactic latitudes, selected fortheir proximity to the densest portions of a variety of high Galacticlatitude atomic and molecular clouds. Low-resolution digital spectra areemployed to classify 115 of the stars. Several novel techniques aredeveloped for automatic digital spectral classification, and fordereddening Stromgren uvby-beta and Johnson UBV,H-beta photometry. Anempirical determination of the errors in the derived dereddened colors,and techniques for converting between the two photometric systems arepresented on the basis of the analysis of a statistically significantsample of 1480 stars with complete data sets in both photometric systemsand with an accurate MK spectral type. New constraints on the distancesto several clouds are presented.

Stromgren and H-beta photometry of stars earlier than G0 in 5 areas containing high latitude molecular clouds
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1989A&AS...80..127F&db_key=AST

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:	Irmak
Sað Açýklýk:	04^h40^m13.68^s
Yükselim:	-13Â°00'55.2"
Görünürdeki Parlaklýk:	8.231
Uzaklýk:	190.84 parsek
özdevim Sað Açýklýk:	15.1
özdevim Yükselim:	8.1
B-T magnitude:	8.727
V-T magnitude:	8.272

Kataloglar ve belirtme:

Özgün isimleri
HD 1989	HD 29709
TYCHO-2 2000	TYC 5327-191-1
USNO-A2.0	USNO-A2 0750-01062399
HIP	HIP 21752

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