CCD Stromgren Photometry of NGC3496 and MELOTTE:105

Details CCD Stromgren Photometry of NGC3496 and MELOTTE:105 CCD Stromgren Photometry of NGC3496 and MELOTTE:105

Nov 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.277..250b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 277, NO. 1/NOV1, P. 250, 1995

Other

12

Stars: Early-Type - Stars: Variables: Other - Open Clusters And Associations: Individual: Ngc 3496 - Open Clusters And Associations: Individual: Melotte 105

Scientific paper

We present uvbyβ photometry obtained with a CCD for the open clusters NGC 3496 and Melotte 105. The distance moduli and reddenings are determined. The field of NGC 3496 contains at least two populations: an intermediate-age group including a small number of late B- to early A-type stars and an older group most conspicuously represented by a red giant clump. Fitted isochrones give ages of about 400 and more than 630 Myr respectively. There is considerable differential reddening. We present data for a newly discovered 5.54-d Cepheid in the field on NGC 3496 which, judging by its age and reddening, is a background star. Three variables with periods of hours may be δ Scuti stars. Melotte 105 is a considerably younger cluster with an age of about 250 Myr. There is no evidence for differential reddening in this cluster and the main-sequence band is much better defined than in NGC 3496.

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