Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...353l..11m&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 353, April 10, 1990, p. L11-L15.
Astronomy and Astrophysics
Astrophysics
27
Astronomical Photometry, Cepheid Variables, Magellanic Clouds, Star Clusters, Stellar Oscillations, Astronomical Models, Charge Coupled Devices, Color-Magnitude Diagram, Stellar Mass
Scientific paper
CCD survey data are employed to examine Cepheids in young Magellanic Cloud star clusters. The properties of three Cepheids observed in NGC 2157 are described. It is detected that the two short-period (3 days) Cepheids have photometric properties that correspond to overtone pulsators and the long-period (7.7 days) Cepheid pulses in the fundamental mode. The pulsational masses for the three Cepheids are calculated to be about 5 solar masses. This mass value does not correlate with the average pulsational mass for Cepheids of 3.0 + or - 0.4 solar masses. The potential cause of this deviation in evolutionary/pulsational mass is investigated.
Madore Barry F.
Mateo Mario
Olszewski Edward W.
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