Hubble's unknown-type variables in M33 are Cepheids

Details Hubble's unknown-type variables in M33 are Cepheids Hubble's unknown-type variables in M33 are Cepheids

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pazh....9..653s&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 9, Nov.-Dec. 1983, p. 653-655) Soviet Astronomy Letters (ISSN 0360-0327), vol. 9, Nov.-

Astronomy and Astrophysics

Astronomy

Astronomical Photometry, Cepheid Variables, Variable Stars, Light Curve, Stellar Luminosity

Scientific paper

The variable objects V14, 15, 21, 32, and 45 in M33, all with periods that were studied but not defined by Hubble, were reexamined. The objects were confirmed to be Cepheids from their light curves, although no successful determination was made of the V15 period. The 51 (or 52) known Cepheids in M33 therefore have periods ranging from 3.23-74.88 d. Period-luminosity relations for the M33 Cepheids demonstrate the similarity with other Cepheids.

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