Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21813305v&link_type=abstract
American Astronomical Society, AAS Meeting #218, #133.05; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Abstract. Tombaugh 5 is a little investigated open cluster located in the direction of the Camelopardalis complex of dust clouds (RA = 3h47.8m, DEC = +59d03.2m). We investigated the area of 20'x20' size, centered on the cluster, applying CCD frames taken with the 1 m telescope of the USNO Flagstaff Station in the seven-color Vilnius photometric system with the passbands at 345, 374, 405, 466, 516, 544 and 656 nm, supplemented by a broad-band I filter. Magnitudes and color indices for 674 stars down to V = 17.7 mag were obtained. Spectral types and luminosity classes were determined using interstellar reddening-free Q-parameters. These data allowed us to calculate interstellar extinctions and distances, and to plot the color-magnitude diagram for stars dereddened individually. This diagram is used to identify cluster members and to determine its age and distance. Magnitudes and color indices from the IPHAS survey, together with the data from the Vilnius system, were used to investigate the distribution of interstellar extinction with distance in various directions within the field.
Boyle Richard P.
Straizys Vytautas
Vrba Fred J.
Vygandas Laugalys
Zdanavicius Justas
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